US1560748A - Work clamp for woodworking machines - Google Patents

Description

- C. G. WILDERSON WORK'- CLAMP FOR WOODVIORKING MACHINES Filed May 29' 1924 '2 Sheets-Sheet 1 INVENTOR Nov. l0l 1925- INVENToR 2 Sheets-Sheet 2 I I I I I I I I I Fned My 29.

C G -WILDERSON WORK CLAMP FOR WOQDWORKING MACHINES by a filler plate 41 slidably mounted in a I shown in Figure-V3, the lever 27 is depressed and the clamping foot moved into engagement with the work andl positively held in such position. lVhen the cam portion is turned into a position to bring its flat surface 33'parallel to the upper side of the lever 27, the spring 24 is permitted to raise the clamping foot out of engagement with t-he work. It will be apparent that the adjustable collar 22 enables the position of the clamping -foot to be adjusted in accordance with the thickness ofthe work to be clamped, whereby the cam v will exert the proper clamping pressure thereon. When either of the bushings 25 is removed from its open` ing, the shaftI 29 and its cainpoition 30 can be removed from the arm 6 through such opening. Y u

Integral with the lower end portion of the hub portion 7 of the arm 6 is a horizontal sleeve 34. VThis sleeve receives a bar 3,5, `which may be of Wood or any other suitable material, having a series of spaced holes 36 therein. The sleeve 34 carries a pin 37 adapted to engage in any one ofsaid holes and thereby hold the bar inl adjusted position. This bar vis adapted to abutat one end against a side of the work WV.

A. work guide is mounted upon the end i portion of the base opposite that which carvries the ypost 4. This work guide is in the form of a plate 38 having a vertical flange 39 at one redge thereof for 'engagement with the side of the work W opposite the side enf gaged by the end of the bar 35. The plate 38 is pivoted at the longitudinal center thereof upon a pin 40. Thispin is carried slot 42 extending from the end of the base longitudinally7 thereof. The pin projects upwardly from the filler plate into a recess 43 in the under side of the plate 38 adjacent the flange 39. The base has a longitudinal slot 44 thereinbeneath the filler plate and in line with thepivot pin 40. A bolt 45 extends vertically through this slot, through lthe filler plate and through an arcuate slot y 46 in the plate 38, the said arcuate slot hav ing itsfcenter coincident with the center of the -plvot piny 40. The lowerend of the `bolt 45 has ahead 47 engaging the under side of the base, and the upper end ofthe t j bolt is screw threaded and' has mounted j as an axis.

thereon a wing nut 48, whereby the guide plate 38l may be clamped in any desired angular position, the plate being adapted toghe swung about thecenter of the pivot pin 4() It will also be seen that the guide plate 38. may be shifted bodily longitudinally of the table by loosening the wing nut and shiftingthe filler plate 41 in the slot 42, the longitudinal movement of the filler plate benglimited onlyA by the length of the slot 44 Obviously this slot maybe unade any desired'length.

In using this work clamp, the collar 22 will be adjusted on the stem 17 into a position such that when the fiat side 33 of the cam 30 is parallel to the upper surface of the lever 27, the coil spring 24 will elevate the clamping foot 19 to a position slightly above the` upper surface ofthe piece of work to be clamped. The arm 6 is adapted to be swung about the post 4 into any desired angular position to suit the angle at whiohit is 'desired that vthe work be positioned on the base. When'the arm 6 is swung into such angular osition thebar v b C 7 35 moves with it, so that when the arm 6 is adjusted into the desired positiomthe bar y35 maybe adjusted so as to engage the side of the work. lThe guide plate 38 may then be adjusted vinto the desired angular position vpreferred embodiment of my invention, it

will be understood that changes fnay be made in the details ofconstruotion without departing from the spirit of 'the invention or scope of the appended claims.

I claim:

1. A work clamp, comprising a support, a vertical stem slidably mounted in said support, a clamping foot carried by the lower end of said stem, a coil spring surrounding said stem and engaging at itslower end a fixed portion of the support and atits upper end a collar adjustably mounted onfsaid stem, and means engageable with said collar for moving said foot to and positively holding it in clamping engagement with `the work, substantially as described. i

2. A. work'elamp, comprising an arm a1.'- ranged to overlie the work to be clamped, a vertical stem slidably mounted in said arm. a clamp-ing foot carried by the lower end of said stem, a coil spring surrounding said stem and engaging a fixed .support on 'the arm at-its lower end and at its upper end a collar adjustably mounted on said stem, a lever pivoted to said arm and enga-ging the upper side of said collar, a cam journaled in said arm and engaging the upper side of said lever formoving said foot to and holding it in'clamping engagement with the work, and means 4Afor operating said cam, substantially as 'described 3; "AQ-i work clamp, comprising a hollow arm .arranged tov overlie the work to be d, vertical stem slidably mounted gianni, a clamping foot Qarried by the;

lll)

"insegue erating said cam portion, substantially as described.

et. A work clamp, con'ipi'ising a hollow arm arranged to overlie the worl: to be clamped, a vertical stem slidably mounted inV said arm, a clamping footY carried by the lower end of said stem, a coil spring surrounding said stem and engaging a fixed support on the arm at its lower end and at its upper end a collar adjustably mounted on said stem, a lever pivoted on said arm and having a bifurcated end straddling said stem and engaging the upper side of said collar,` bushings removably mounted in aligned openings in the sides oi"- said arm, a shaft ouinaled in said bushings and having a cam portion engaging the upper side of said lever for moving said clamping foot to and holding it in clamping engagement with the work, said shaft and itscam portion being removable through one of said openings, and means for operating said cam portion, substantially as described.

A work clamp, comprising a. base, an arm arranged vto overlie the work to be clamped and mounted for swinging movement about a vertical axis, said axis being` shiit'table longitudinally of the base to enable bodily adjustment of the arm, va clamp device mounted in said arm for vertical movement, yielding means tending to elevate said clamp device, and means `for moving said device. to and holding it in clamping engagement with the work, substantially as described.

6. A Work clamp, comprising an arm arrangedto overlie the work to be clamped and mounted for swinging movement about avertical axis, means for limiting the swinging movement of said arm about said axis, said means being adjustable to a position to permit unlimited swinging movement of said arm about said axis, a cla-mp device mounted in said arm for verticalmovement, lvielding means tending to elevate said clamp device, and Ameans for moving said device to and holding itin clamping engagement -ivith the work, substantially as described.

'7. A work clamp, comprising a base, a vertical post mounted upon said base for bodily adjustment longitudinally thereof, means for holding said post in adjusted po- `sition, an arm arranged to overlie the work ab i idA clamping engagement with the work, sub

stantially as described.

8. A work clamp, comprising a base hav- ,mams aan-.

ing an inverted T slotk extending longitudi'- nally thereof, a hollow post mounted on said base and having meansprojecting from its lower end into the narrow vportion of said slot for preventing rotation of said post While permitting adjustmentthereof longitudinally of said base,ran arm arranged to overlie the work to be clamped andl having a hub portion journaled on.v said post and through which the latter extends, a bolt extending-'through said post and having a head on its lower end positioned in the wide portion o'l' said slot, said head engaging the sides of said slot to prevent turning of the bolt, removable means mounted on the upper end of said bolt and engaging the'upper end of said post and 'overlyingthe upper end of said hub portion to prevent removal of the post and arm while permitting the arm to swing freely on said post, and work cla-mpingv means carried by said arm, .substantiallyV as described.,r

9. A workclamp, comprising abase hav- ,y ing anv inverted'T slot extending longitudi- Y nally thereof, a hollow post mounted on said base and having means projecting from its lower end into the narrow portion of said slot for preventing' rotation of said post While permitting adjustment thereof longitudinally of said base, an arm arranged to overlie the work to be clamped and having a hub portion journaled on said post, a bolt extending through said post and having a head on its lower end positioned in the wide portion of said slot, said head engaging the sidesl of said slot to prevent turning of the bolt, a nut mounted on the upper end of said sa f iiov

bolt, a washer interposed between said nut] and the upper end of said hub portion, .and Work Vclamping means carried by said arm, substantially as described. i Y

10. A Work clamp, coinprisinga base, a vertical post mounted on said base and having a horizontal slot therein, `an arm arranged to overlie the Work to be clamped and having a hub portion journaled on said post, a pin adjustably mounted in vsaid hub portion and having its inner end'A normally positioned in said slotv to limitfswingingn movements of said arm, and worlgjcl'ampin'g means carried by said arm, substantially as described. f v 1-1. A Work clamp, comprising ,.a base,a

horizontally extending arm arranged to overliethegwork to be clamped and having Cil fg. Y 1,560,748

a hub portion` at lone end thereof joul'naled lany of said openings, said bal' being adapted upon a vertical support carried bythe base, toy abut at one end against thel Work to be a horizontalV guide carried by said hubl porclamped, and Work clamping means carried l0 tionY adjacent said base, a bar mounted to by said arm, Substantially as described.

slide in Said guide vand having a, series of In testimony whereof I have hereunto set spaced openngstheren, a pin mounted in my hand. y said guide and adapted to be positioned in CLINTON G. IVILDERSOIXT.I

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