Year: 1897

page_text: Date of Application, 31st Aug., 1897
Complete Specification Left, 24th May, 1898-Accepted, 2nd July,
1898
I, JAY KYLE SHEFFY, of Number 507, Ashland Block, in the City of Chicago,
United States of America, Manufacturer, do hereby declare the nature of this
invention to be as follows:
The invention relates to improvements in pipe wrenches, and particularly to
that type known as chain wrenches, in which a chain is attached to a rigid handle-
bar, and is adapted to be wound about the pipe so as to grip the latter.
The objects
of the invention are, to adapt the chain feature to wrenches of small size; to pro-
vide an implement of great power and of extreme simplicity of action, and which
may be operated with great speed.
I accomplish these objects by attaching, by a swiveled connection, a chain to
the end of a handle-bar upon which is sleeved a tubular shank having flaring jaws
at its end from between which the chain protrudes. One or both of these jaws
is transversely serrated, and the jaws are bifurcated so as to allow the chain to
fall between their two members.
The chain is composed of a number of short plate sections, pivoted together, the
pivot-pin being prolonged in each direction so as to constitute laterally projecting
studs. Upon the back of one of the jaws, being that one which has a serrated
face, if only one is provided with such serration', form one or more notches or
hooks adapted for the engagement of the laterally projecting studs of the chain,
such hooks being formed upon both members of the bifurcated jaw.
The jaw carrying shank is in screw-threaded engagement with the handle-bar,
so that when the jaws/have been applied to a pipe and the chain passed around
the same and brought into engagement with the notches or hooks upon the back
of the jaw, the handle-bar may be rotated, the tubular shank will be prevented
from turning by reason of the engagement of its jaws with the pipe, the chain
may thereby be drawn into this shank so that its grip upon the pipe will be in-
creased to any desired degree, the swiveled connection of the chain to the handle-
bar permitting the rotation of the latter independently of the former.
Dated this 31st day of August 1807
5
Improvements in Pipe Wrenches.
I, JAY KYLE SHEFFY, of Number 507, Ashland Block, in the City of Chicago,
United States of America, Manufacturer, do hereby declare the nature of this in-
[Price 8d.]

page_text: vention and in what manner the same is to be performed, to be particularly de-
scribed and ascertained in and by the following statement:---
The invention relates to that class of pipe wrenches in which a chain is used
in co-operation with a serrated jaw, and its object is to provide a simple, durable,
and strong construction whereby the chain may be used to bring the jaw firmly
to the work. The invention consists in the various parts, and arrangements as
hereinafter fully set forth.
In the accompanying drawings,
Fig. 1 is a central longitudinal section of the wrench;.
Fig. 2 is a detail elevation of the swivel block by means of which the chain is
secured to the handle-bar of the wrench;
Fig. 3 is a detail elevation of the end of the handle-bar which engages the swivel
block;
Fig. 4 is an end elevation of the wrench looking toward the jaws;
Fig. 5 is a side elevation of the jaws:
The jaws, A, B, are in fixed relation and diverge in V-form; both jaws being
bifurcated and the jaw A having its contacting face transversely serrated.
These jaws are formed integrally with a tubular shank, C, which fits upon the
handle-bar D. A chain, E, is secured to the end of the handle-bar and protrudes
from the end of the shank C, so as to play between the two members of each of
the jaws, A, B, so that it may encircle a pipe, as X, to which the jaws may be
applied and be locked thereto by being caught upon suitable notches, a, a, formed
on the back of the jaw A. The links of this chain consist of short plate sections
pivoted together, the ends of the pivot-pins, e, projecting beyond the plates so
as to form studs which will engage the notches a, a.
The chain E is secured to the handle-bar by means of a swivel block, F, trans-
versely slotted at one end for the reception of the first link of the chain which
is secured therein by means of a suitable pivot-pin, and having at its other end
a T-socket, f, with which a T-shank formed on the end of the handle-bar 1 co-
operates, thereby forming a swiveled joint so as to permit of the rotation of the
handle-bar within the shank C, without turning the chain.
It will be seen that the T-shank may, if desired, be formed upon the swivel block
and the T-socket in the end of the handle-bar, and accomplish the same result.
This construction is so obvious that I have not deemed it necessary to show it in
the drawings.
The handle-bar D and shank C are in screw-threaded connection, the screw-
threads, however, being formed only in the middle section of their contacting sur-
faces, leaving smooth contacting surfaces at each end as shown at c, c', thereby
providing for ample bearing surfaces to carry the strain to which the wrench is
subjected without throwing this strain upon the screw-threaded portion. The
diameter of the section of the handle-bar and of the socket of the shank C is
less than the maximum diameter of their screw-threaded sections, and that of
the sections e¹ is as great as the maximum diameter of these screw-threaded
sections so that the handle-bar may be withdrawn from the shank.
The end of the bore of the shank Cas it issues between the jaws A, B, is somewhat
contracted in line with the bifurcating slot of the jaws, and the second joint of the
chain E is thickened by the application to the ends of its pivot-pin of suitable
nuts; or lagging blocks, H, H, which prevent this joint from entering the throat
of the bore of the shank until the chain has been turned one quarter of a revolution,
thereby preventing a careless operator from drawing the chain too far within the
bore of the shank in using the wrench.
In using the wrench the jaws are held to the pipe with the chain turned back-
wardly between the members of the smooth faced jaw B, the chain then being
turned about the pipe and drawn up as tight as possible and caught by means of
its laterally projecting studs in the nutches a, a, the handle-bar being now turned
backwardly within the shank C, so as to draw the chain within the bore of the
latter, the jaws are forced firmly to the pipe and grip it securely. To permit the

page_text: This
wrench to be turned backwardly upon the pipe for a new grip, the handle-bar
is slightly turned within the shank so as to loosen the hold of the chain, being
turned in the opposite direction as power is again applied to the wrench.
turning of the handle-bar to release and tighten the chain is so slight that the
operator accomplishes it by a slight movement of the wrist, and without delaying
his work.
A suitable wood handle piece, as K, is preferably applied to the handle-bar as
is usual in implements of this character.
The smooth faced jaw B is of service only in applying the implement to a pipe,
and serves also as a bearing as the wrench is drawn backward.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:
1. In a pipe wrench the combination with a handle-bar, and a chain attached
to the end of the bar by a swiveled joint, of a shank sleeved upon the handle-bar
and in screw-threaded engagement therewith, and a serrated jaw carried by the
shank and having its back adapted to engage the chain.
2. In a pipe wrench, the combination with a handle-bar, and a chain attached
to the handle-bar by a swiveled joint, of a shank sleeved upon and in screw-
threaded engagement with the handle-bar, the shank and handle-bar having
smooth co-operating bearing surfaces upon each side of their co-operating screw-
threaded portions, and a jaw fixed upon the shank for co-operating with the chain
and having its back adapted to engage the chain.
3. In a pipe-wrench, the combination with a handle-bar, and a chain attached
to the end of the handle-bar by a swiveled joint, of a shank sleeved upon and in
screw-threaded engagement with the handle-bar and carrying a jaw for co-
operating with the chain, the throat of the shank aperture being oblong in cross-
section, its major diameter being parallel with the plane of action of the chain,
the chain having a thickened portion near its attached end to limit its inward
movement.
4. In a pipe wrench, the combination with a tubular jaw carrying shank, and
a handle-bar adapted to fit within the shank and being in screw-threaded engage-
ment therewith, of a chain and a swivel block attached to the chain, such block
being attached to the end of the handle-bar by means of a T-shank on one of
said members and a co-operating T-socket in the other of said members.
5. In a pipe wrench, the combination with a tubular jaw carrying shank, and
a handle-bar adapted to fit within the shank and being in screw-threaded
engagement therewith, of a chain, a swivel block attached to the chain, and
having a transverse T-socket in one end, and a T-shank on the end of the handle-
bar for engaging the socket.
6. The combination with a handle-bar, a chain attached to the handle-bar
by a swiveled joint, and a tubular shank sleeveed upon the bar and in screw-
threaded engagement therewith, the shank and bar having co-operating smooth
bearing surfaces upon each side of their screw-threaded sections, of a pair of
relatively flaring bifurcated jaws mounted upon the end of the shank, one of such
jaws having a serrated face, hooks or notches on the back of such jaw, and laterally
projecting studs carried by the chain for engaging such hooks or notches, all
sulistantially as described and for the purposes set forth.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.