US2325613A - Toggle c. clamp - Google Patents

Description

Aug. 3, 1943. o, M. KIRLIN TOGGLE C CLAMP Fi ked March 5, 1941 2 Sheets-Sheet 1 fzjszacis New " jpplioation Mar-chi,

V Q I p (cum-cos) "The present inventionrelates;to the art-ol' ad-i justable clamps 1 in general and provides a ue= vice -of this character whereby "anydesired adjustment 01' the same may be very speedily accompiished without-disturbingthe "arrangement of parts in the clamping process while the same are being machined. V '-Whil -this clamp possesses almost unlimited use, it is particularly-adapted for arc or gas welding-operations; i '9 In meow type 000 -'clam'p*wherein the throat member 'is providedwith an elongated-screwihav 'lnga pivotal shoe uponthe lower-end thereof, the rotating of the-screw, lntightening tends to-disturb theposition of-clampedparts, and with this type; of clamp and particularly in weiamgbp ra- V tions, it 'is common for splashingof hot metal to become embedded within the threads of the screw thus making it inoperative, and it is usually impossible to remove this splashed metal from the screw.

' stood herewith that all portions oftthe device 1 beingassociated therewithandnota part there 7 of will :be :designated byi consecutive'ly arranged alphabetical letters, while the invention properf numerals;

,In' the toggle C clamp herein disclosed,it is more easily to operate andto accuratelyretain r the clamped objects in their proper relative position at all times, the toggle and rack serving as arapid means i'or'variable adjustment, andthe tightening of the clamp does not tendtovdistur b the position of the clamped parts; and any splashed hot metal rinding or filing.

With the foregoing in mind, it will become vreadily apparent that the invention possesses further advantages; all of which will become readily apparent during the course of theiollowing'detailed description, illustrated throughout the accompanying drawings, and more fully pointed 'out'in the appended claims. With reference to the drawings: i

Figure 1 is aside elevation of the complete 4 Iwhen the clamp is tightened by the screwing clamp showing the same beingadjusted to a relatively thin piece of metal; and Figure 2 is a similar view showing the clamp being 7 adjusted to objects or decidedly greater thickness. Figure 331s an enlarged sectional view exposing the toggle mechanism, and in normal position;

maybe easily removed by lower portion of the rack; the iwithinlsaid rack rbeing clearly visible; I

finlcarryingout my invention, let-it be underwill'.-he;characterlzed by the customary reference In further carrying-cutrny invention I employ C clamp frame A, and referring more partlcu-' larly'ito Figures 3 and 4 it isiseen that theupper portionoi: said frame is enlarged as at "-B, and having pocket I' therein, so as to accommodate the tree action oi*-oneendportion of link 2,

while the-o pposite-end portion or said-link" being similarly disposed impeach! cram 4, said l as ati, andbelng likewise pivoted to arm 4 as at Referring now to Figures 1 to 4 inclusive, it is observed that rack 1 is provided, and that by virtue of the toggle mechanism and the slidable motion of rack 1 quick or instant adjust ment is made with this clamp whereas in the old a .type of c clamp wherein the screw'is used/by changing the adjustment of this type, the screw must bebacked off the work in a slow manner and consistent with the time required for this' link-being pivoted to frame A Toggle screw I2 is provided and threadedly 1 engages arm 4, and it is readily seen that in Figure 3 the toggle arm 4 is held upon rack 1 by spring l3when the device is in a clamping position, and in Figure 4 it is very clear how the,

toggle is pulled over so as to and thereby releasing the same.

disengage rack l Toggle screw I 2 contacts at its lower enda concave portion of frame A, this concave portion tending to force and retain the other-end of arm 4 into proper and accurate engagement with rack down of toggle screw l2.

and Figure 4 is a similar view showing the toggle mechanism disengaged from the rack.

Figure 5 is an enlarged sectional view taken upon line 55 of Figure 1. l t

Figure 61s on enlargedbottom view of athe j 881c member..

Figure 7 is an enlargedsection taken upon" 7 line ll-I of Figure 2.

Figure gig a sectiono f the rack"shoeand Shoe 9 is loosely attached to the end of rack 1 to permit of its more accurate contact with the surface of parts clamped. Q

In conclusion, let it be understood that the 1 complete disclosure herewith is merely illustrative of the general principle of the invention sought to' be protected by Letters Patent, and it will be readily understood by those skilled in the art to which the same pertains that various ychangesin detail may be made to suit any par- 'ticular orpeculiar requirement without departing from the spirit'of the invention as defined in the appended claims. r I i V elongated slot 7 Having thus fully described my invention, what I claim as new is: v

' 1. In a clamp, the combination with a C- shaped frame, the inner end thereof terminating in arfixed work engaging jaw, the outer opposite end being provided with an opening, a rack bar freely slidable through said opening, a coasting work engaging jaw mounted on th inner end of the slidable rack bar, an arm disposed adjacent" the outer end portion of the frame, a link pivotally connecting the intermediate portion of the arm to the outer end portion of the frame, a locking dog formed on the inner end of the arm, and

means for normally holding the dog in looking engagement with the teeth of the rack bar for locking the latter and its jaw against sliding movement in one direction, said means comprising a leaf spring secured at oneend on the frame, the free end of said leaf spring bearing against the outerrside edge of the link.

,2. In a clamp, the combination with a C- shaped frame, the .innerend thereof terminating,

7 the latter andits jaw against sliding movement in one direction, said means comprising a leaf spring secured at one end on the frame, the free end of said leaf spring bearing against the outer side edge of the link, and a thumbv screwthreaded rection.

through the outer end of the arm and having its inner end bearingagainst the adjacent portion of the frame, said thumb screw forming a handle for shifting the arm and the link away from the rack bar, and dispose thelocking dog in an inoperativeposition, to permit the free sliding movement of the rack 'bar and its jaw in either di- 3. 'In a clamp, the combination with a C- shaped frame, the inner end thereof terminating in a work engaging-jaw, the outer opposite'end being provided with a non-circular opening, a rack bar of the same cross sectional shape as the opening slid'able therethrough, a coacting work engaging jaw mounted on the inner end ofrthe rack, banan arm disposed adjacent the I outer endof the frame, a link pivotally connect 'ing the intermediate portion of the arm to the V outer end portion of the frame, a locking dog formed on the inner end of the farm, means for normally holding the locking dog in looking engagernent with the teethof the rack bar for locking the rack bar and the jaw carried there by against sliding movement in one direction, and a thumb screw threaded through the outer end portion of the arm for manually shifting the latter outwardly to disposed 'thelocking dog in an inoperative'position and permit the free sliding movement of the rack bar and its jaw in either direction, the portion of the frame against which the inner end of, the thumb screw normally-bears being ooncaved to form a seat for said thumb screw, said thumb screw coacting with said seat to cause the dog'to move the'rack bar into a clamping position when the thumb screw is turned in one direction. v

a OTIS M. KIRLIN.

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