US1918750A - Plane - Google Patents

Description

E. V. HIGBEE July 18, 1933.

PLANE Filed July 18, 1932 3mm Earl VHzybee w;

Patented July 18, 1933 UNITED STATES PATENT OFFICE EARL v. irreiann, or New B'EITAIN, CONNECTICUT, ASSIG-NOE ro'rnn IsTANLEY WORKS, OF NEW BRITAIN, CONNECTICUT, A CORPORATION or CONNECTICUT PLAN E Application filed July 18,

The present invention relates to planes such as disclosed in the Patent No. 1,812,820, granted June 30, 1931, to James M. Burdic In planes of this character, when the cutter is constantly adjusted forwardly and backwardly, the clamping lever tends to move back and loosen on the lever screw.

It is an object of the present invention to provide an improved clamping lever for lever but which will obtain the advantageous results pointed out above.

A still further object of the present invention is to provide an improved clamping lever for devices of this character which may be manufactured at substantially the same cost as the old style lever.

Other objects will be in part obvious, and in part pointed out more in detail hereinattern V j The invention accordingly consists in the features of construction, combination ofelements and arrangement of parts which will be exemplified in the COl'lStlLlCtlOll hereinafter set forth and the scope of the-application of which will be indicated in the appended claims.

In the accompanying drawing, wherein is shown, for illustrative purposes, one embodiment which the present invention may take,

Fig. 1 is a side view, partly in section, and partly in elevation, of, a plane showing my improved clamping lever applied thereto; i i

Fig. 2 is a front elevation of my improved clamping lever; and i Fig. 3 is a longitudinal section of the same.

Referring more particularly to thedrawing, A generally represents a plane of a well known type, and B generally represents my improved clamping lever applied thereto. The plane A may be of the usual construction and comprises a plane bottom .10 which. supports a Wedge-shaped block member 11 slot 31.

1932. Serial No. 623,159.

against which bears a blade 12 having a cutting edge 13 extending through an opening 14 in the plane bottomv 10. A cap plate 15 bears upon the upper surface of the blade 12 and is clamped thereagainst by the lever B which is held in position by a lever screw 16,

a cam 17 and a spring 18 of usual construction. Y

Theblade12is providedwith a centrally disposed longitudinally extending slot 19 which extends from a point a rearwardly to a point 6 and the cap plate 15is provided 'with an opening 20 registering with a lower portion ofthe slot 19 in the blade 12. The blade 12 and the cap plate 15 are secured together by a screw 21 in the usual manner so that. they move together. The screw 16 passes through the slot 19 and the opening 20 and is receivedby a screwv threaded socket 22 in the block 11. i

.In order to adjust the blade backwardly and :forwardly, an adj usting mechanism, generally. indicated at C, is provided. The mechanism C comprises a screw threaded bar 23 iron-rotatably secured in the block 11. A 1 V nut 24- is threaded upon the bar 23 and is provided with a pair of spaced apart collars 25 between which are confined the heads 26 (only one of which is shown) of a lever27 which is pivoted, as at 28, intermediate its ends tothe block 11., The free end 29 ot' the' lever 27 passes through the slot 19 in the blade 12 and. engages in an opening 30 in the cap plate 15. The end 29 of the lever 27 engages theends of the opening; 30 so that the cap plate 15 andblade 12 are moved forwardly or baekwardly by the lever 27 dependent upon the direction of movement of the nut 24 with which the lever is operatively connected. I q

The clamping lever B is of substantially the same construction as the old style lever with the exception that, instead of the usual keyhole slot, my improved clamping lever B is provided with asoinewhat kidnev'shaped This slotis provided with an en larged forward portion 32 and a restricted rearward portion 33 0t less wi'dth than the diameter of thejhead of the screw 16. Between the enlarged portion'and the restricted port-ion, thewall 3 1 of the slot 31 is provided with an inwardly extending projection whereby an offset 36, is formed at one SlClG. of

and rearwardly facing shoulder 35a and with an inwardly and'forwardly facing shoulder 35?). The opposite wall 37 of the slot is curved inwardly and rearwardly, as at 38,

towards the ofli'set 36 and merges with the rear end wall 39 of the slot.

In the use of the device, after the'blade 12 and the cap plate 15 have been properly placed upon the block 11, the lever screw 16 is screwed into the block 11. the lever B with the cam 17 in a position at substantially right angles to that shown in Fig. 1 is then placed upon the cap plate by threa d in a: the enlarged portion 32 of the slot 31 over the head of the screw'16. The lever'B is now moved downwardlvand forwardly and should the wall.

37 of the slot 31 engage the shank of the screw 16 due to the curvature 38 of the wall 37. the lever will be guided by the shank of the screw 16 so that the offset 360i the slot 31 willbe caused to receive the shank of the screw 16. 7

It will he noted. that the shoulder 35b of the projection 35 is curved inwardly and rearwardly so that, in assembling the lever B upon the screw 16, should the shank of the screw become engaged against the shoulder 35b, forward movement of the lever will earn the same to one side so that the projection 35 will clear the shank of the screw and the curved portion 38 of the wall 37 will engage the shank of the screw and the lever B will be guided so that the offset 36 will receive the shank of the screw 16. It is thus apparent that regardless of whether the shoulder 35?) or the wall 37 of the slot 31 engages the shank of the screw the lever will be so guided that the offset-36 will be caused to receive the shank of the screw. At this time, the shank of the screw 16 will he engaged at its front and rear sides bvthe shoulder and the wall" I ea'rwardlv curv d portion. said nroiection 39 respectively. The cam 1.7 is then swung to the position shown in Fig. 1; whereupon the rear end of the clamping lever B is moved. outwardly with res ect to the blade 12 to bind the upper surfaces of the walls of the restricted portion" 33 of the slot 31 against the under surface of the head of the screw 16. lever B will now he held positively aga nst auv longitudinal movement since the shank oi'the screw 16 is confine between and .enrra fled bv the s oulder 35mand the end wall 39, of the slot. The adiustino' means C isnow mani ulated to prooerlv adiust the blade .12 to the. desired position. When the adiustinrrmeans C is manipulat d to adiust the blade 12 hack. the shoulder 35a en aging the front wall of the screw shank will prevent the clamping lever B from moving hack and loosening on thelever screw 16.

j Asmany changes could be made in the above construction and many apparently widely different embodiments of this invenion could bemade without departing from said to fall therebetween.

I claim as my invention:

1.-A clainpinn lever for planes substantially kidnevshaped slot. having an enlarged port-i and 1. portion and an inwardly etwi'iding projecting on one wall or" said slot and d mo. he tween said portions, d pro gcction having:

aninwardlv and rearwardly mm s oulder,

2. A clamping lever for planes having: a substantially kidney-shaped s ot. said slot having an enlarged portion and rest icted portion and an inwardlv extendins' pr -icetion on one wall of said slot and disposed hetween said portions provide an in said. restricted portion. the opposite wall of said slot (nirvinn inwardly and rearwardly towards said ofi'set.

3. A plane comprising a lever screw. and a clamping lever having a slot therein. said slot having an enlarqed forward portion "adapted to initially receive said screw and aflrestricted rearward portion adapted to subsequently receive said screw, one wall of said slot having an inwardly extending pro-iection adapted to ensragre the for- 'ward wall of s id screw when the latter is disposed. in said restricted nortionthe oppos te wall of said. slot having an inwardlv and having: a forwardl and inwardly tacinsz shoulder which is curved inwardly and rearwa dlv.

4. In a plane. a cutter blade. means for adiustins said hlade v orwardlv and backwardlv. a. clamninc' lever for holdine: said hladev in adiusted osition. a lever screw. and a cam carried hv said lever and adapted to cooperate with said screw to ho -said lever n clamping: position. sa d ver havinrr a s ot therein provid d an enlarged. po tion ada ted to initiall receive sa screw and a restric ed portion ada td to suhseeuentlv eceive said screw one wall of said slot havin an inwa d eYt ndin/q' Dr iectiop ad pt ed to engraere the forward wall oi the shank of said screw to maintain the lever arrainst rearward longitudina movement. whereby the lever is prevented from escapinq from the screw while the blade is heinn adiusted.

EARL V. HIGBEE.

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