US296622A - Hand-screw - Google Patents

Description

(No Model.

T. RENO.

HAND SCREW.

No. 296,622. Patented Apr. 8, 1884.

.Z Z, WITNESSES II VVENTOR I, '3 m Afforney UNITED STATES PATENT Grinch.

THOMAS RENO, OF DETROIT, MICHIGAN.

HAND-SCREW.

SPECIFICATION forming part of Letters Patent No. 296,622, dated April 8, 1884.

Application filed January 14, LES 4.

tied, and more particularly pointed out in the claims.

In the drawings, Figure 1 is a front elevation of a device embodying my invention, showing parts in section. Fig. 2 is a separate view of one of the nuts. Fig. 3 is aseparate view of the thimble.

In the drawings, A and A represent the jaws; B and B, metallic screws provided with.

suitable handles, 2) and b. To receive the handle I prefer to square the end of the screwshaft, as shown at B or otherwise shape the end of said shaft so that it will not be liabl to turn in the handle. i

It is evident that in operation a drawing force will be exerted upon the screw B, whereby there will be more or less liability to draw the screw-shaft from the handle I). To prevent this, however, I prefer to screw-cut the end of the shaft, and to provide it with a suitable nut, as shown at E. On the other hand, on the screw B a forcingpressure is exerted, and consequently a tendency to draw the shaft of the screw from the handle-b does not need to be guarded against, so that the handle may be suitably located upon the shaft of the screw in any proper manner.

It will be seen that by employing metallic screws instead of the ordinary wooden ones, much smaller screws can be used, requiring less action to obtain a tight grip, while atthe ,same time a tighter grip may be obtained without any liability of twisting off the handle or shaft, and-without a liability of stripping the threads.

By manufacturing hand-screws in this manner, furthermore, longer screws can be employed for the same length of jaw than where (No model.)

wooden screws are employed, thus providing for a wider opening of the jaws, with less danger of stripping the threads orof twisting off the screw-a common occurrence with the old-fashioned hand-screw. In larger sizes, too, in consequence of having finer screwthreads than is common with ordinary wooden screws, when greater power is required to obtain a severe grip, it can be obtained much more readily.

While I do not wish to limit myself to any particular kind of screw-thread, instead, however, of constructing the screws and jaws with the V-thread, I prefer to construct said parts with a ratchet-threadi. e., with a thread having a square face, as shownas this construction of the thread is much better.

Instead of providing the jaws with ordinary wooden screw-threads to receive the screw, I

may locate in the jaws suitable metallic nuts, 0

and 0, without departing from the principle of my invention. These nuts may be' secured in thejaws in any suitable manner. A suitable socket may be provided in the jaws to receive said nuts, which may then be riveted in place; but I prefer to provide said nuts with ribs 0, and to force the nuts into place by pressure, said ribs running parallel with the grain of the wood, which construction will prevent the ne cessity of rivets to hold the nutsin place. I do not, however, limit myself to any particular method of securing the nuts in the jaws. By providing the nuts with the ribs 0 they will be prevented from turning in the jaws.

D is a thimble adapted to receive the end of the screw B, the end of said screw being preferably reamed down to fit the thimble, the thimble being sufficiently deep to give the proper length, in order that the screw may work freely in the sockets of thethiinble. By the employment of this thimble there is no liability of wearing upon the wood, as would otherwise be the case. The thimble might, however, be omitted without departing from the principle of my invention. Moreover, the various parts which are constructed of metal may readily be made in duplicatesi. a, the nuts 0 and O are the duplicates of each other. The thimble D may also be manufactured in duplicates of any desired number, and each of the screws B and B, so that each like part is interchangeablca fact of considerable importance in the manufacture of the device, and should any repairs become necessary.

Ahand-screw thus constructed is more durable, more easily operated, and provides for. a firmer grip than has hitherto been the case with hand-screws of this nature as commonly manufactured.

What I claim is 1. A hand-screw consisting of jaws, having in combination therewith suitable metallic screws, one of said jaws being provided with metallic nuts inserted therein from opposite facesof said jaw, substantially as described.

2. A hand-screw consisting of the combination, with the jaws, of metallic screws, one of said jaws being provided with metallic nuts 0 O, inserted therein from opposite faces of said jaw, and the other jaw provided with a suitable thimble, substantially as described.

3. A hand-screw consisting of the combina tion, with the j aws, of suitable metallic screws, B B, one of said jaws being provided with metallic nuts inserted from opposite faces of the jaw, to receive said screws, the screw B being provided with a suitable handle, and a nut, E, to preventthe screw from being withdrawn from the handle, substantially as described.

4. In a hand-screw, the combination of the two jaws, one of them being provided with metallic nuts inserted therein'from opposite faces of the jaw, and the other provided with a metallic thimble inserted from the inner face of the jaw, the metallic screws B B, provided with suitable handles, and a nut, E, to the screw B, to hold the handle thereon, substantially as described.

5. In a hand-screw, the combination of the jaws A A, metallic nuts 0 0, provided with ribs and inserted in jaw A from opposite faces of the jaw, and the metallic screws B B, substantiallyas described.

In testimony whereof I sign this specification in the presence of two witnesses.

THOMAS RENO.

W'itnesses:

N. S. WRIGHT, M. B. ODOGIIERTY.

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