Improvements in Wrenches.
Year: 1898

page_text: Date of Application, 17th Oct., 1898-Accepted, 4th Feb., 1899
COMPLETE SPECIFICATION.
Improvements in Wrenches.
I, SAMUEL S. GROVE, Blacksmith, of Summit, Cambria County, State of
Pennsylvania, United States of America, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement: —
This invention relates to improvements in wrenches, and the object thereof is
to provide a device of this character which is adapted for use in connection with
an ordinary bit-stock or brace. The device is so constructed that pressure exerted
against the brace when the wrench is attached thereto causes the jaws of the
wrench to securely grip the bolt or nut being operated upon; and it is simple in
construction, inexpensive, compact and durable, and it is designed as a valuable
addition to an artisan's kit.
The invention will be hereinafter fully described and specifically set forth in
the annexed claims.
In the accompanying drawings forming part of this specification, Figure 1 is
a side elevation of my improved device showing the jaws thereof in closed position;
Figure 2 is an edge elevation; Figure 3 is a side elevation showing the jaws in
open position, and Figure 4 is an inverted plan view.
In the practice of my invention, I provide primarily, an ordinary square bit-
shank A, having an elongated squared extension a, projected therefrom and formed
integrally therewith. This said extension is connected with a conical projection
a, which has a head a², formed upon the face thereof. It is further supplied
with a recess at a³, adapted to receive the end of a bolt during the operation of
tightening a nut. Surrounding the squared extension a, of the bit-shank A, is
a slide B having downwardly extended hangers 6, formed upon each side thereof.
These said hangers engage swinging levers C, which said levers are curved out-
wardly and pass downwardly through apertures of the head a², their lower ends
forming part of jaws C, which have squared recesses c therein, for engagement
with the head of a nut or bolt; the levers C, being pivotally connected to thic
hangers b, by means of rivets b¹.
It will be noted that the upper portion of the cone a¹, extends laterally from
each side of the shank extension a, whereby shoulders a³, are formed to limit the
downward movement of the slide B, thus preventing the straight portions of the
levers C, from being jammed within the apertures a, by the act of opening the
jaws.
In the operation and use of the device, the adjacent jaws C¹, are brought into
contact with the opposing corners of a nut or bolt head; then pressure being
brought against the bit-shank by means of a brace adapted to be attached thereto,
will cause the jaws to tightly clamp the bolt or nut head, whereupon the same
may be readily turned to any desired degree, and as soon as pressure is released
from the end of the same, the jaws may be readily removed from contact with
the head of the bolt or nut being operated upon.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A wrench adapted for use in connection with a bit-stock or brace, compris-
ing a bit-shank having an extended head at the lower end thereof and a slide
thereon, the said slide being supplied with swinging jaws which engage apertures
of the said head, whereby downward movement of the slide will open the jaws,
substantially as shown and described..
2. In a wrench adapted for use in connection with a bit-stock, the combination
of a bit-shank and a movable slide thereon, the said slide being supplied with
pivotally attached levers having jaws upon their outer ends, said jaws having
recesses therein for receiving a bolt or nut head, substantially as shown and
described.
3. As a wrench, the combination of a bit-shank adapted for engagement with
an ordinary bit-stock, and a slide engaging the said bit-stock, the said slide hav-
ing swinging levers thereon which pass through an extended head of the bit-
shank, and form part of jaws having square recesses therein for engagement with
a bolt head or nut, substantially as shown and described.
Dated this 17th day of October 1898.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C.; Agents.