US2347570A - Carpenter's plane - Google Patents

Description

7 April 1944- A. H. LAVIEVTES I 2,347,570

CARPENTER S PLANE Filed Dec. 28, 1942 M 'II n'wv 0 ma 1 flnocnfoa WM 11/ w M h5 0;

Patented Apr. 25, 1944 UNITED STATE S PATENT' OFFICE,

This invention relates to carpenters planes" andhas for an object to provide an improved adjusting'means for the blade of this type of plane,

and one which is simple and requires a very small number of parts, willbe inexpensive to manufacture; and particularly a construction in which not only longitudinal adjustment of the blade may be efiected to adjust the depth of cut, but also lateral or angular adjustment may be easily made so that the cutting edge. may be easily located parallel to the. bearing surface of the bottom plate'of the. frame to give a uniform depth of out.

, With the foregoing and other objects. in view,

I have devised the construction illustrated in the accompanying drawing forming a part of this specification. It is, however, to be understood that the invention is. not limited to the specific details and arrangement shown, but may employ various changes and modifications within the scope of the invention.

In this drawing:

Fig. 1 is a top plan view of the device;

Fig. 2 is a vertical longitudinal section;

Fig. 3 is a top plan view of a portion of the adjusting mechanism;

Fig. 4 is a transverse section substantially on line 4-4 of Fig. 3;

Fig. 5 is an elevation of the adjusting screw beforeassembly, and

Fig. 6 is a side and elevation of the adjusting head for the screw.

The device comprises the body ll] having the usual bottom plate I I provided with a fiat smooth undersurface to ride on the surface of the work, with upright side walls or strengthening ribs L2 at the opposite edges thereof. At the front of the bottom plate is a hand knob 13 mounted in any suitable way, as by the bolt l4, and at the rear and is another hand grip 15 mounted on the base by a bolt I6. The bottom plate is provided with a transverse slot I! through which may project the cutting edge 18 of the blade I 9 supported on the upright transverse rib 20 and the inclined transverse wall or rib 2!. At the upper side of the blade, to hold it in position, is the clamp plate or block 22 adapted to press at its lower end 23 on the top of the blade a short distance above the cutting edge, and it has a transverse groove 24 in its top wall in which may seat the transverse rod 25 mounted at its opposite ends in the upright side walls or ribs l2. The top surface of the lower edge 23 may be curved or rounded to form a breaker for the chips. The clamp plate 22 also carries a clamping screw 26 threaded in the plate and adapted to press against the blade [9 at its lower end.

The clamp plate 22 is provided with twoupright longitudinally spaced lugs 21 and 28 which may be formed integral with the plate and be tween them the plate is provided with a longitudinal slot 29 extending therethrough. These lugs 21 and 28 formbearings for the adjusting screw 30, the inner or lower end of the screw being reduced as indicated at 3| for bearing in the lug 21,

thereduction forming a shoulder 32 to engage the. upper surface of. the lug while the upper endportion 33 is left smooth for bearing in the lug 28. The upper endis reduced'at 34 to receive a 1 knurled knob or head 35 which forms a finger grip for operating the screw. This can be a disc ofsui'table. thicknessv with a centralopening 3.6 made slightly smaller than the reduced portion 34 so that it may be mounted on the screw by merely forcing this reduced .portion into the opening, but it is a forced fit so that the friction is sufilcient to retain the knob on the screw and to operate the screw. The inner end 3| is bored or recessed longitudinally as indicated at 31 and the reduced portion 3| is somewhat longer than the thickness of the lug 21.

Threaded on the screw between the lugs 21 and 28 is an adjusting nut 38 which has a downward extension 39 within the slot 29 of the clamping plate and projecting at its free end into an opening 40 in the blade l9. Above the screw 30 this nut has an extension 4| forming a finger grip by means of which the nut may be adjusted or swung laterally. The screw may be assembled in the clamping plate 22 by inserting it through the lug 28 and threading it into the nut 38. The reduced lower end 3| can then be inserted in the lug 21 and the free end of the recessed portion can be spread outwardly or rolled over, as indicated at 42, to retain it in the lug. It will be seen that this is a very simple assembly operation and one by which the necessary assembling operations may be reduced to a minimum. It also greatly simplifies the construction of the screw, as it may be made from a piece of round rod merely threaded the proper length and all the turning required is for the reduced portions 3| and 34 at its opposite ends. The screw can therefore be readily made in an automatic screw machine with simple operations and giving very little scrap or waste material.

In use, when it is desired to shift the blade Hi to adjust the depth of the cut, all that is necessary is to loosen the clamping screw 26 and then adjust the blade I9 longitudinally by turning screw 30. This shifts the nut 38 longitudinally which, acting through its extension 39 in the opening 40 in the blade, will carry the blade with the movements of the nut. If the cutting edge 18 is not parallel with the surface of the base plate H the blade can be easily and quickly adjusted to make this cutting edge parallel with the surface by means of the finger grip 4| on the nut 38. That is, by gripping this finger grip 4| and moving it laterally either to the right or left, the lower extension 39 of the nut will be swung laterally and through its action on the sides of the opening 40 in the blade will adjust the upper end of the blade laterally in either direction and thus adjusting the angular position of the cutting edge, and by this means the cutting edge l8 may be located parallel with the under surface of the base ll. When the blade has been adjusted longitudinally, or laterally or angularly to the desired position, it may be clamped in this position by'means of the clamping screw 26. The width of the bladeis less than the distance between the side walls l2 to permit this angular or lateral movement of the blade. It will be seen that the slot 29 in the clamping plate 22 is considerably wider than the extension 39 of the nut so as to permit suificient lateral movement of the extension 39 in efiecting the angular adjustment of the blade. The. cross rod 25 seating in groove 24 insthe top of the clamp plate 22 forms a fulcrum for this plate, and the rod and groove coact to hold the plate against longitudinal movement.

It will be seen from the-above that this provides a very simple and effective structure which can be manufactured and assembled with a minimum number of operations and with a minimum loss of material in scrap; also that the blade may not only be readily adjusted longitudinally to properly locate the blade to give the desired projection of the cutting edge below the bearing surface II for the desired depth of cut, but further that it may be readily adjusted angularly to insure that this cutting edge is parallel to the surface of the plate II to insure a uniform depth of cut throughout the entire width of the blade. As the blade can be thus adjusted, it is not necessary for the operator to insurethat the cutting edge is ground at exactly right angles to the sides of the blade, and it readily insures that there is no danger of one edge of the blade being lower than the other to dig into the surface of the work and make a slight ridge in the surface.

Having thus described the nature of my invention, what I claim is:

In a plane of the character described, a base having a transverse slot, an inclined blade having a cutting edge adapted to project through said slot and its opposite end adapted for lateral movement to adjust the cutting edge into parallelism with the base, a clamp lplate above the blade, a longitudinally extending adjusting screw carried by the plate, a longitudinal slot through the plate, an adjusting nut on the screw provided with an extension projecting through the second slot and into an opening in the blade to cause the blade to move with the nut, said latter slot being Widenthan the extension to peri mit lateral movement of the extension in the slot, and an extension on the nut opposite the first extension providing a lever for turning the nut laterally on the screw to shift the upper end of the blade laterally to adjust the angular position of its cutting edge in the base.

ABRAHAM H. LAVIETES.

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