US830453A - Bolt-clipper. - Google Patents

Description

PATENTED SEPT. 4, 190e. E K PORTER BOLT GLITTER.

AFPLIOATION FILED AUG. 31, 1905.

UNITED 'sTATEs PATENT oEEioE.

Specification of Letters Patent. Appiication med August 31, 1905. serial No. 276,513.

Patented sepa-1,1906.

To @ZZ whom, it may concern.'

Be it known that I, HENRY K. PORTER, a citizen ofthe United States, residing at Chelsea, in the county of Suffolk and State of Massachusetts, have invented a new and use- Improvement in Bolt-Clippers, of which the following is a specification.

My invention relates to the class of such tools in which the cutting-blades are operated through compound levers, and is made adjustable by means of a novel construction. illustrated in the accompanying drawings, in which Figure 1 is a plan of the tool embodying my invention, including a cross-section of the cutting blades or edges. Fig. 2 is an edge view of the same. Fig. 3 is an inner edge view of one of the Fig. 4 is alperspective of one of the pivotal handle-lever bolts and its cutting-lever bushing-block, which are em loyed to adjustably connect the handleevers and cutter-levers. Fig. 5 is an elevation of the notched cutter-lever bolt and an under side plan of same. Fig. 6 is a cross-section on the devious line 6 6, Fig. 1. Figs. 7, 8, and 9 are different views of a modification which show a device independent of the handle-levers for preventing the movement with the cutter-levers of the adjustingscrews.

This clipper differs from others heretofore invented and `patented by me mainly in the mode of adjusting the cutting edges through their actuating-levers. It comprises the usual p'air of cutter-levers A A, having the cutting blades or edges v ing teeth on the meeting edges of the cutterlevers, as shown-inbreken lines. The cutter-levers are pivoted by bolts C C', which pass through cross straps or plates D on 0p-l posite sides of the levers. The bolts C C have left and right screw-threads, respectively, by which they are screwed into the lower cross-strap D, bolt C being left-handed and C right-handed, corresponding to the movements of their respective cutter-levers .when operated to cut, thus avoiding the tendency whichmight exist to turn the pivotbolts by friction between the levers and bolts under the stress of cutting and to such an extent as to so clamp the levers between the 'straps as to render the use of the tool impracticable or impossible. To more positively guard the bolts against such frictional turning, I form notches or ratchet-teeth C2 handle-levers detachedf from the cutter-lever.

B B and interlock-v in the under sides of the heads of the bolts, as shown in Fig. 5. The salient angles of l these notches or teeth being properly temjpered will resist such frictional turning of j the bolts by biting into the softer surface of j the strap against which they are turned, the

j ratchet-teeth under the heads being formed right-handed and left-handed, respectively, l corresponding with the screw-threads on thc bolts. The levers A and A are also joined by bolts to the handle-levers E E at A2 A3, while the handles are pivoted together at'EZ. Thus far, with the exception of the ratchetteeth under the heads of the bolts, this is old. Theiddescription will now depart from what 1s o The lever-handles are formed with branches G G, each of which describes an arc of a circle whose center is the pivot E2. In the actuated ends H H of the cutter-levers A A are formed slots, one of which is shown in dotted lines at I, Fig. 1. These slots afford a limited movement of the ends of the cutter-levers independently of the action of the handle-levers with which they are joined. This is for purposes of adjustment, as follows: A block J forming a partial bushing, is fitted yin each of said slots, and through the block is passed the pivotal bolt K, as shown in the perspective, Fig. 4, and also through the handle-lever E', where it is secured by nut K. able only with handle E E around the pivot E2., To accomplish the adjustment of the cutter-levers referred to above, a pair of adjusting-screws L L are threaded laterally into the ends of the cutter-levers and extended through to the blocks. The arms or branches G G on the handles embrace the ends of the pair of cutter-levers, somewhat like a Spanner and serve as stops against the outer ends of the adjusting-screws to prevent their movement with the cutter-levers outwardly, and the blocks serve as stops against the inner ends of the screws to prevent such movement inwardly. To adjust the cutterlevers with reference to the cutting edges B B in case of a wearing or breaking away of the edges so that it becomes necessary or desirable to adjust the edges closer together, the screws L L are turned in a direction to screw them toward the blocks; but being confined between the blocks and handle branches no lineal advancement of the screws is practicable. Hence the action of the screws upon the cutter-levers is to draw the These bolts and blocks are movroo V IIO levers toward the heads of the screws, and thus to close the cutting edges nearer together. A reversal of the adjusting-screws operates in like manner to separate the cutting edges. The slots I afford sufficient, play of the levers to effect such adjustment.

In lieu of the branches G, formed on the handles E, as shown and described, a device which I term a bail, clearly shown in Fig. S and marked M, may be employed to support the adjusting-screws against endwise movement independently of the handles. The bail M is formed and adapted to embrace the combined cutter -levers and handle levers and to be secured thereto by the pivotal bolt K, the screw L in this case being formed with' a pintle L2, Which passes through a hole in the bail, as shown, to keep the bail in right relation to the end of the screw to hold the latter from endwise movement, thus serving the same purpose and as effectively as the branches G on the handles E.

I claim- 1. A bolt-clipper embodying the combination of a pair of pivoted cutter-levers having slotted ends; a pair of handle-levers pivoted to each other, and joined to the cutter-levers by bolts through the slots in their ends; a pair of adjusting-screws threaded into the slotted ends of the cutter-levers; and means arranged to hold the adjusting-screws in place against endWise movement thereof; all ulstantially as andfor the purposes speci- 2. In a bolt-clipper, the combination of a pair of pivoted cutter-levers, h'aving slotted ends; a pair of handle-levers, having curved arms Jformed thereon, and pivoted together and to the slotted ends ofthe cutter-levers; a pair of bushing-blocks fitted to the slots in the cutter-levers, and heldin place by the pivotal bolts, and a pair of adjusting-screws threaded into the slotted ends of'the cutterlevers; all substantially as and for the purposes specified.

HENRY K. PORTER.

Witnesses:

EUGENE HUMPHREY, JAMES E. LEACH. y

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