Tag: Charles E. Mitchell

No. 930,307 – Plane (Charles E. Mitchell And Edmund A. Schade) (1909)

[paiddownloads id=”664″]930307

UNITED STATES PATENT OFFICE.

_________________

CHARLES E. MITCHELL, OF NEW YORK, N. Y., AND EDMUND A. SCHADE, OF NEW BRITAIN, CONNECTICUT, ASSIGNORS TO THE STANLEY RULE & LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PLANE.

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930,307. Specification of Letters Patent. Patented Aug. 3, 1909.
Application filed May 6, 1902. Serial No. 106,200.

_________________

To all whom it may concern:

Be it known that we, CHARLES E. MICHELL and EDMUND A. SCHADE, citizens of the United States, residing at New York, N. Y., and New Britain, Connecticut, respectively, have invented certain new and useful Improvements in Planes, of which the following is a full, clear, and exact description.

Our invention relates to improvements in the construction of planes, and particularly to the parts which are adapted to carry and provide adjustment for plane irons in that class known as bench planes.

The part of the plane which immediately supports the cutting tool or plane iron is commonly termed a frog. This part is so constructed as to bear upon and be supported by the stock portion of the plane and to itself carry and provide means for adjusting the position of the iron. This frog is commonly constructed of cast iron and separate from the base or stock portion of the plane. Frogs constructed in this manner of cast metal are heavy, and having the usual characteristics of such metal, are easily broken and but poorly adapted to withstand the strains to which such a structure is subjected. The great weight is also a material element in considering the usefulness and general utility of a plane. For this reason, it is desirable that the parts shall he made as light as possible and consistent with a requisite strength. In casting such a body as this, it is not feasible to make it of such a finish as to be immediately useful in the final construction which is desired. For this reason it is necessary that it should be put through several finishing operations under machine tools in which the surfaces are given the proper angles relatively to one another and finished to present satisfactory bearing surfaces and appearance. Being of irregular and peculiar shape, there are moreover set up in a frog strains due to the unequal cooling of the metal in different parts of the frog consequent upon the casting operation. These strains are likely to and often do cause checks and irregularities in the structure to such a degree that the parts are the more easily subject to fracture when used in the ordinary course of business. Even if actual defects do not appear on the surface of the metal, there sometimes are such initial strains in the interior as to seriously impair the strength of the parts. For these reasons and in order to make the structure in a more simple and economical manner we have constructed the parts of sheet metal which may he for instance cold rolled steel. ln this way a very light, reliable and economical structure is effected which in its use is most satisfactory and durable.

ln the drawings: Figure 1 is a side elevation partly in section of a plane embodying the improvements of our invention. 2 is a perspective view from the rear of the parts which immediately support a plane iron. Fig. 3 is a rear elevation of the same with what may be termed yoke portion of Fig. 4. Fig. 4 is a perspective view from the front of this so-called yoke portion. Fig. 5 is a view partly in section of the Y-adjustment lever which is used with the part of Fig. 2. Fig. 6 is a side elevation and section of the plane iron supporting member and adjusting devices.

In Fig. I the stock or base portion of the plane is represented as shown at 1 which may have as usual a rear handle and a forward knob for convenience in handling the same. In the base of the stock portion is provided the usual throat or opening 10, and to the rear a chair or seat 13. Above the chair is supported the part 2 which may he herein termed the frog and which provides the immiediate support or bearing for a plane iron. Beneath this frog is what may be conveniently termed a yoke portion 3 which may he attached to the frog as hereinafter set forth. The plane iron 4 which rests upon the face of the frog is in the form shown provided with a plate 5 at its upper surface. These are in turn held in place by a cap iron 6 and are provided with the Y-adjustment lever 7 coacting with an adjusting nut 8. A laterally adjusting lever 9 is secured at the top of the frog.

The yoke portion 3 which is formed at the lease in a manner suitable to cooperate with the chair portion 13 of the stock 1, is provided with slots or holes 30. Through these holes pass the screws 31 which secure the yoke portion to the base and thus provide a forward and backward adjustment for the position of the frog. The front end 32 of the base portion of the yoke may be bent downward at an angle to correspond with the under surface of the face of the frog to which it may be secured, as for example by rivets. The upright portion or back of the yoke extends upward and is secured at the downwardly bent portion 36 to the frog at a point just above the opening 20 in the face of the frog. Through this opening access may be had readily to the securing screws 31 in the base.

When the plane iron and plate are adjusted in position and secured to the frog by means of the cap iron 6 and cap screw 61, the frog is subjected to stresses of considerable amounts. To provide for meeting these stresses it is desirable that the sides of the frog should be bent down and depressed to form reinforcing flanges. It will be noted that these flanges as shown are substantially triangular in form and correspond in depth from the face of the frog very closely to the diagram of changes in bending moments which would occur in a beam loaded in the center and supported at the ends, which is the case that we have herein. The cap iron 6 is provided with a cam lever 65 for effecting the requisite pressure between the cap and the plane iron or the plane iron plate for holding the parts in place.

The upper end of the bearing face of the frog is depressed in a truss-like form at 29 to provide a recess in which the lower end of the aterally adjusting lever 9 may be pivoted at 92 and operate. The end of this lever 9 may be provided as is usual in planes of this character with a disk 94 which cooperates with a slot 40 in the plane iron 4 to effect the desired lateral adjustment. The depth of the cutting edge of the instrument may be adjusted by means of what is known as a Y-adjustment 7 in which the nose 75 projects forward through an opening in the face of the frog into a hole 50 in the plate which is above the plane iron. The plane-iron and plate being secured together by the screw 45, movement up and down of the Y-adjustment will also operate the plane iron itself.

The face of the frog is provided with a perforation or recess to receive the head of the securing screw which is thus let into the platform and allows the plane iron to have a smooth and even bearing upon the face of the frog. Above this recess the metal of the frog may be cut out and bent back in the form of ears 27 which will provide bearings for the pivot of the Y-adjustment. In order that these ears may be bent back at convenient angles and with as little injury to the metal as possible, it is desirable that the sides of the recess should be cut back both above and below the ears and at the base thereof as shown particularly in Fig. 3. ln order that the Y adjustment 7 may have a secure and even bearing and also to increase the economy and efficiency of the device, we have made the Y-adjusting lever 7 of sheet metal as shown in Fig. 5, in which 70, 70 are perforations in the two opposite sides of the lever to provide for the pivot pin. It will thus be seen that the lever has two bearings and that they are spaced apart a considerable distance. The lower ends of the arms 78 coact with the adjusting nut 8 which operates on the screw 81. in this construction as shown particularly in Fig. 6 the adjusting screw 81 is conveniently seated in the back of the yoke at a point near the top thereof where the strength and rigidity of the same would be sufficient to give it a secure bearing. lt is also desirable that the face of the frog should have a reinforcing piece at the point where the cap screw 61 is attached thereto. The bent down portion 36 of the yoke provides this in a most satisfactory manner. By this structure also the cap screw tends to aid in holding the yoke and the frog more securely together. The upper portion 33 of the back of the yoke may be out away as appears most clearly in Fig. 3, and thus provide an easy and convenient access for the purpose if desired of riveting the plate 36 to the frog 2. The lower front end of the yoke acts also as a reinforcement to the lower front edge or toe of the frog in the structure herein shown, and materially adds to the strength and efficiency of the parts since the pressure of the lower end of the cap iron 6 is applied near this point. The cutting edge of the plane iron may be projected through the throat or slot 10 in the base of the stock portion just in front of the toe of the frog. The face of the frog is also reinforced as shown by the depressed portion 29 which in stamping the article forms a corrugation at that point substantially opposite the point of application of the pressure applied by the cam lever 65 at the upper end of the cap iron.

The whole structure is exceedingly light in weight and although very simple and economical in its construction is durable and efficient.

The yoke 3 forms a backing for the plane-iron and may be referred to in some of the claims by the term backing or frog backing.

What we claim is:

1. In a plane the combination of a stock-portion having a throat therein for the passage of a plane-iron, a chair at the rear of said throat, a sheet metal frog adapted to sit upon said chair, a plane-iron bearing against the face of said frog, a plate for said plane-iron, a screw for securing said plane-iron and said plate together, a perforation through the face of said frog forming a cavity to receive the head of said screw the head of said screw being accessible from the rear of said frog, the sides of said frog being depressed to form supporting flanges, substantially as described.

2. In a plane the combination of a stock-portion having a throat therein for the passage of a plane-iron, a chair at the rear of said throat, a sheet metal frog sitting upon said chair, a plane-iron bearing against the face of said frog, a plate reinforcing said plane-iron, a screw for securing said plane-iron and said plate together, a recess in the face of said frog forming a cavity to receive the head of said screw, pivot ears formed from the metal of the face of said frog and bent above said recess forming bearings for the pivot of an adjustment lever.

3. In a plane the combination of a stock-portion having a throat therein for the passage of a plane-iron, a chair at the rear of said throat, a sheet metal frog sitting upon said chair, a plane-iron bearing against the face of said frog, a plate for said plane-iron, a screw for securing said plane-iron and said plate together, a perforation through the face of said frog forniing a cavity to receive the head of said screw, pivot ears formed frori the metal of said frog and above said cavity forming bearings for the pivot of an adjustment lever, said adjustinent lever being formed of sheet metal and having bearings in the opposite sides thereof, substantially as described.

4. In a plane the combination of a stock-portion having a throat therein for the passage of a plane-iron, a raised chair at the rear of said throat, a sheet metal frog for said chair, a plane-iron bearing against the face of said frog, a plate over said plane-iron, a screw for securing said plane-iron and said plate together, a perforation through the face of said frog forming a cavity to receive the head of said screw the head of said screw being accessible from the rear of said frog, the sides of said frog being depressed and forrning triangular shaped supporting flanges for said frog resting on said chair, the forward edge of said frog projecting downward beyond the chair and resting on the sole back of the throat and forward of the chair.

5. In a plane, a stock-portion having a chair seat therein, a frog adapted to support a plane-iron and adjacent parts, the sides of said frog being depressed to form supporting and reinforcing flanges and a sheet metal yoke portion secured to said frog, and means for securing said yoke portion to said frog portion, substantially as described.

6. In a plane, the combination of a stock-portion, a frog for supporting a plane-iron, the said frog being formed of sheet metal having the opposite sides depressed to forrn supporting and reinforcing flanges, a yoke secured to said frog forming a seat for said frog, and a screw secured in said yoke portion and adapted to carry a means for adjusting the cutting depth of a plane-iron.

7. In a plane, a stock-portion having a chair therein, a sheet metal frog adapted to support a plane-iron, screws for securing said frog to said stock-portion, a perforation through the face of said frog to permit of access to the said screws, a plane-iron having a plate at the top thereof, a screw for securing said plate and said iron together, a perforation in the face of said frog to receive the head of said screw, a lever for laterally adjusting the position of said plane-iron, a depressed portion from the face of said frog to form a recess to receive said laterally adjusting lever, pivot ears struck from the metal of said frog and bent down to form bearings for an adjustment lever, the metal of the face of said frog being cut away above and below at the sides of said ears, substantially as described.

8. ln a plane, a stock-portion having a chair therein, a sheet metal frog adapted to support a plane-iron, screws for securing said frog to said stock-portion, a perforation through the face of said frog to permit of access to said screws, a plane-iron having a plate at the top thereof, a screw for securing said plate and said iron together, a perforation in the face of said frog to receive the head of said screw, a lever for laterally adjusting the position of said plane-iron, a depressed portion from the face of said frog to form a recess to receive said laterally adjusting lever, pivot ears struck from the metal of said frog and bent down to forrn bearings for an adiustrnent lever, the metal of the face of said frog being out away at the sides of said ears, and a yoke portion secured to said frog forming a reinforce therefor, and providing a bearing for a cap screw and also a bearing for an adjusting screw.

9. ln a plane, a sheet metal frog forrned with depressed side flanges, a sheet metal yoke having slots in the base thereof for adjusting-screws, said yoke being bent down at the upper portion and secured to the underside of the face of said frog, substantially as described.

10. ln a plane, a sheet metal frog formed with depressed side flanges, a sheet metal yoke having slots in the base thereof for adjusting-screws, said yoke being bent down at the upper-portion and secured to said frog, and a cut out portion in the face of said frog below the point of attachrnent of the upper end of said yoke, whereby access may be had to the slots in the base of said yoke, as and for the purpose specified.

11. In a plane, a frog formed of sheet metal having the sides depressed to form supporting flanges , a yoke formed of sheet metal and separately therefrom but united to the underside of the face thereof at the lower end and also at the upper end by a bent down portion, substantially as described.

12. ln a plane, a stock-portion, a frog for and forming a bearing for a plane-iron, means for securing said frog to said stock-portion, a plane-iron secured to the face of said frog, a plate secured to said plane-iron, a screw for fastening said plate to said iron, a recess in the face of said frog forming a cavity to receive the head of said screw, bearings formed integral with said frog and above said recess, an adjustment lever formed of sheet metal and having its nose projecting upward into a hole in said plate and having bearings in the two opposite sides thereof for a pivot therefor, and means for operating said adjusting lever, substantially as described.

13. In a plane, a stock-portion, a frog for and forming a bearing for a plane-iron, means for securing said frog to said stock-portion, a plane-iron secured to the face of said frog, a plate secured to said plane-iron, a screw for fastening said plate to said iron, a recess in the face of said frog forming a cavity to receive the head of said screw, pivot bearing ears formed integral with said frog, the face of said frog being out away at the sides near the upper and lower edges of each pivot bearing ears for the purpose specified.

14. In a plane, a stock-portion, a frog for supporting a plane-iron, a yoke portion formed of sheet metal and secured to said frog portion and having slots in the base thereof for receiving securing screws and a support in the rear thereof for carrying a Y-adjustment screw.

15. In a plane, a frog formed of sheet metal having a perforation near the top thereof to receive a screw-head, a yoke portion formed of sheet metal and at its lower forward edge parallel to the face of said frog portion, the base of said yoke portion being bent back from the face of said frog to form a bearing surface and slotted to receive securing screws, the back of said yoke portion being adapted to form a bearing for an adjustment lever screw, and means for securing the upper end of said yoke to said frog.

16. In a plane, a frog formed of sheet metal having a recess near the top thereof to receive a screw-head, a yoke portion formed of sheet metal and secured at its lower forward edge to said frog portion, the base of said yoke portion being bent back from said frog and having holes to receive securing screws, the back of said yoke portion being adapted to form a bearing for an adjustment screw, the upper end of said yoke being bent downward and forward and parallel to the face of said frog, and means for securing said bent down portion to said frog.

17. In a plane, a frog formed of sheet metal adapted to support a plane iron, a yoke portion formed of sheet metal and at its lower forward edge secured to said frog portion, the base of said yoke portion having holes to receive securing screws, the back of said yoke portion being adapted to form a bearing for an adjustment screw, the upper end of said yoke forming a supporting means for a cap screw.

18. In a plane, a frog formed of sheet metal adapted to form a bearing for a plane iron, a yoke-portion formed of sheet metal and secured at its lower edge to said frog portion, the base of said yoke portion having holes to receive securing screws, the back of said yoke portion being adapted to form a bearing for an adjustment screw, and means for securing the upper end of said yoke to said frog, the sides of said frog being depressed to form reinforcing flanges about said yoke portion.

19. In a plane, a plane stock, a chair portion therein, a frog adapted to carry a plane-iron, a sheet metal yoke secured to said frog having a base portion and being secured at its upper portion to the said frog and having a back portion extending from said upper portion to said base, said back portion being narrowed at the top adjacent said top portion to facilitate attaching the said top portion to the said frog.

20. A frog for a plane said frog being formed of wrought metal, the opposite edges being turned downwardly, a sheet metal frog-backing to the rear and underneath said frog, permanently secured to the frog, and means for removably securing the backing to the plane stock.

21. In a plane, the combination of a stock portion, a frog formed of sheet metal and adapted to support a plane iron said frog having downwardly extending flanges formed integrally with its face, a rearwardly extending sheet metal member carried by said frog and substantially parallel to the upper surface of the sole of said stock portion an upward extension therefrom secured to the back of the frog and means for securing said frog to said stock portion whereby it may be adjusted backward and forward on its seat.

22. In a plane, a plane stock, a frog formed of sheet metal and having reinforcing side flanges, a sheet metal frog-backing formed separately from said stock and said frog, means for securing said backing to said frog and means for adjustably securing said backing to said stock to permit said frog to be adjusted to and fro and a passage through the frog to afford access to the last mentioned means.

23. A frog for a plane, said frog being formed of sheet metal, downwardly extending integral side flanges and a separately formed sheet metal downwardly extending and reinforcing backing secured to the frog.

24. A frog for planes, said frog being formed of sheet metal, a separate backing attached thereto and extending downwardly and to the rear thereof, screws for securing said frog to the plane, a passage through the face of the frog to afford access to the screws, an opening in the upper part of the frog and integral lugs adjacent to said opening and a lever pivot-ed between said lugs.

25. In a plane, a stock portion, a frog therefor formed of sheet metal and having at downwardly extending backing securely fixed at the rear thereof end resting on the stock, and means for removably securing the same thereto.

26. In a plane, the combination of a stock portion, a sheet metal frog adapted to support a plane iron and a reinforcing sheet metal yoke portion secured to said frog, said yoke portion having a downwardly extending member, a forwardly extending member and a further downwardly and forwardly extending member, the letter being secured to said frog adjacent its foward lower end.

27. In plane, a stock portion, a frog carried thereby, a plane iron and cap carried by said frog, a lever for adjusting said plane iron formed of sheet metal and having side arms connected by an integral bend forming a double nose for engagement with the plane iron, and an adjusting member cooperating with said side arms for moving said lever.

Signed at New Britain, Conn., this 2d day of May 1902.

CHARLES E. MITCHELL.
EDMUND A. SCHADE.

Witnesses:
H. S. WALTER,
W. J. WORAM.

No. 814,718 – Plane (Charles E. Mitchell) (1906)

[paiddownloads id=”626″]814718

UNITED STATES PATENT OFFICE.

_________________

CHARLES E. MITCHELL, OF NEW YORK, N. Y.

PLANE.

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814,718. Specification of Letters Patent. Patented March 13, 1906.
Application filed March 26, 1902. Serial No. 100,012.

_________________

To all whom it may concern:

Be it known that I, CHARLES E. MITCHELL, a citizen of the United States, residing at New York city, county and State of New York, have invented certain new and useful Improvements in Planes, of which the following is a full, clear, and exact description.

My invention relates to planes.

Among the main objects of my invention are to provide a plane construction which is simple, inexpensive, effective, and durable. These objects I attain by the use of a new form and arrangement of parts permitting the employment of wrought or sheet metal in the formation of several of the important elements.

ln the drawings, Figure 1 is a side elevation of a plane embodying my invention. Fig. 2 is a longitudinal section through the same. Fig. 3 is a front elevation. Fig. 4 is a perspective view of a detail. Fig. 5 is a perspective view of another detail. Fig. 6 is a plan view of a blank. Fig. 7 is a perspective view of said blank after it has been partially formed. Fig. 8 is a perspective view of a detail of construction formed from the blank 6, and Fig. 9 is a perspective view of another detail.

The stock — that is, the body — of the plane is preferably formed of sheet metal, in which the bottom portion 1 and the sides or cheek-pieces 2 2 may be formed from a blank of a single thickness of sheet metal of proper shape — for example, such a shape as shown in Fig. 6. In the preferable construction this blank is first bent upwardly or crowned, and the sides are also bent upwardly, so as to give to the blank the shape indicated in Fig. 7. When the bottom or floor 1 is flattened down, it will cause the sides or cheek-pieces 2 2 to converge, so that they will assume practically a vertical position. Manifestly the manipulation of the metal in order to produce the desired form may be modified in various ways. ln practice it is customary to provide a transverse passage in the bottom or floor 1, termed the “throat,” through which the cutting edge of the plane-iron projects in use. The throat 3 is indicated in dotted outline in Fig. 6 and may be formed at any time, either before or after the shaping of the stock.

ln the operation of planes of any considerable size it is customary to use both hands, and to that end two handles are usually employed. ln the drawings, 4 is a rear handle, and 5 is a knob constituting a forward handle. The knob 5 may be carried upon a plate 6, which performs the double function of supporting said knob and of reinforcing and strengthening the fioor of the said stock. This plate 6 is provided, by preference, with an integral angular bend 7 at its rear edge so positioned relatively to the throat 3 as to stand closely in front of the same, as best seen in the sectional view Fig. 2. This angular bend also serves to further stiffen the floor directly adjacent to the throat. The handle 4 is carried by the plate 8, which performs the double function of supporting said handle and of reinforcing the floor 1 to the rear of the throat 3.

9 is a supporting chair or bearing, preferably formed near the forward edge of the plate 9, giving further strength to the parts and performing an additional function — to wit, that of a bearing for the frog 10, against which the plane-iron, hereinafter referred to, is clamped. ln the preferable construction the chair or bearing 9 is so formed that the frog will rest upon the rear portion thereof. The forward end of the frog 10 bears upon the floor 1 or upon an extension of the plate 8, if it is desired to extend said plate close to the throat.

11 is a screw-bolt (any desire d number may be provided) which serves to clamp the frog securely in place upon the two bearings-the floor 1 and the chair 9. The bolt 11 is so positioned that it is intermediate of said bearings and will cause the frog to hug tightly thereon, thus preventing chattering of the parts when in use. The frog 10 supports the plane-iron 12, which is clamped thereto by means of a cap-piece 13, which engages with a cap-screw 14, carried by the frog, said engagement being effected in the usual manner.

17 is a cam carried by the cap-piece 13, the same being of the usual construction and performing the usual function — to wit, putting the parts under such tension as to properly clamp the cap-piece and plane-iron against the frog.

15 is a lever carried by a portion of the frog and operated by an adjusting-nut 16, a portion of the lever engaging the plane-iron, so that by means of the nut 16 said plane-iron may be adjusted accurately in the usual way.

I preferably employ a long plate 11a in place of an ordinary nut to coact with the screw-bolt 11. This is a preferable construction, because usually two screw-bolts are employed, both of which may engage with said plate 11a , which gives abroad bearing against the under side of the angular portion formed in the plate 8.

The plates 6 8 may be secured in place against the floor 1 in any well-known manner. One method of attaching the plates is shown in Fig. 3, in which the sides 2 2, close to the floor 1, may be milled out or undercut, and the edges of the plates 6 8 may be correspondingly beveled to take into said undercut recesses. Thus by making a tight fit the plates 6 8 may be driven tightly into place to reinforce and strengthen the floor. The handles 4 5 may be secured in any desired way; but by preference I secure them by means of rivet-bars 41 and 51, respectively. The heads of said rivet-bars engage in countersunk openings in the plates 8 6, respectively, while nuts 42 52 at the upper ends of said rivet-bars serve to clamp the handles 4 5 thereon, respectively.

Additional clamping devices may be employed-for example, a screw-bolt 43, having a nut 44. By this arrangement it will be observed the superposed parts may be securely fastened to the floor without projecting through the same, thus avoiding any danger of marring the wood upon which the plane is used by reason of any irregular projections from the under side of the plane, the surface of which should be smooth and even.

Various modifications may be made without departing from the spirit and scope of my invention, the essential feature of which is to provide a plane of such a construction that sheet metal may be utilized to form the stock or body portion thereof, which stock or body portion will possess all of the advantages of a cast-metal stock in addition to the advantages inherent in the use of sheet metal. This invention permits the use of comparatively thin sheet metal in forming the stock, since the floor is of duplex construction, giving to it the desirable or necessary thickness and strength.

What I claim is —

1. A plane comprising, a body formed of sheet metal and having a sole portion and integral upturned reinforcing-flanges forming the sides, a reinforcing and strengthening plate secured between the side flanges having a stiffening-rib adjacent the throat and a handle separately formed but secured to said reinforcing-plate.

2. A plane comprising a body portion having a sole and sides of sheet metal integral therewith and reinforcing and strengthening plates secured in place against the top of the sole and between the sides having stiffening-ribs adjacent the throat and handle members for said plates, a frog mounted above one of said plates and means for adjusting said frog.

3. A plane comdprising a body portion having a sole and sides of metal integral therewith, and a reinforcing and strengthening piece situated above the sole and between the sides, a chair portion integral therewith between the said sides and supported above the sole leaving a space beneath the seat of the chair, and a separate frog mounted on said chair and secured thereto.

4. A plane comprising a body portion formed of sheet metal and having a sole and sides integral therewith, a sheet-metal chair portion supported by the sole and mounted between the sides, a frog supported on said chair, a pair of securing-screws passing through said frog and said chair and a single plate having screw-threaded openings to act as a nut for both of said securing-screws.

5. A plane comprising, a body portion with integral upturned side flanges, a chair portion supported by the sole and mounted between the sides having a recess below the same, afrog mounted on said chair, a plurality of securing-screws passing through said frog, and the top of said chair, and a plate having screw-threaded openings mounted in the recess beneath said chair and coacting with all of the adjusting-screws.

6. A plane comprising a body portion formed of sheet metal and having a sole and integral side flanges, a reinforcing-plate mounted in a groove in the said side flanges and immediately above the sole portion but resting thereon, a chair portion integral with the reinforcing-plate and a frog mounted on the chair portion and secured thereto.

7. A plane comprising a body portion of sheet metal having a sole and upturned flange portions, a reinforcing-plate secured between said side flanges and coacting with the upper surface ofthe sole portion, a supporting-chair formed integrally with the reinforcing-plate and mounted between the side flanges and a frog mounted upon the said chair.

8. A plane comprising the combination of a body portion having upwardly-extending reinforcing side flanges and a throat between said flanges, means for mounting a plane-iron and a reinforcing-plate supported above the bottom of said body portion and having an integral bend or reinforcing portion 7 immediately in front of said throat.

Signed at New York this 25th day of March, A. D. 1902.

CHARLES E. MITCHELL.

Witnesses:
R. C. MITCHELL,
ROBT. S. ALLYN.