Year: 1889

page_text: Date of Application, 29th Jan.. 1889
Specification Accepted, 2nd Mar., 1889
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings in the County of Middlesex, 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 :-
My invention relates to that class of pipe wrenches that are provided with a
sliding jaw, and it consists in certain details of construction hereinafter fully described
and pointed out in the claims.
Referring to the accompanying drawings
Fig. 1, represents a side view of a pipe wrench embodying my invention.
Fig. 2, is a longitudinal section through the centre of the wrench.
Fig. 3, is a view of the underside of the wrench.
Fig. 4, shows a modification of the spring for keeping the tail end of the jaw in
contact with the shank.
A, represents a shank provided at its outer end with a fixed jaw B, and at its other
end provided with a handle C.
D, D¹, is a jointed movable jaw, the two parts being connected together by a hinge
as shown or otherwise locked together in any suitable manner, the tail portion D¹,
is provided on its upper side with teeth which fit into corresponding ratchet teeth cut
in the underside of the shank A.
To the forward end of the portion D, of the movable jaw, is rigidly secured a
saddle shaped piece of metal E, and a spring F, is inserted in a recess d, formed in
the portion D, the upper end of the spring bearing upon the under side of the shank A,
and to the portion D¹, is secured another saddle shaped piece of metal G, provided
with a projection g, in which a recess is formed to receive a spring H, which bears
upon the upper side of the shank A, so as to keep the teeth on the portion D', in
contact with the teeth in the under side of the shank A; but by means of the spring H,
the saddle G, may be depressed to force the teeth out of contact with each other when
it is desired to open out the jaws.

page_text: If desired a flat spring H', as shown in Fig. 4 may be employed instead of a spiral
spring as before described and a flat spring may also be employed instead of the
spiral spring F.
In using the wrench, the sliding jaw D, D¹, is first drawn back by depressing the
projection g, the jaws are then placed over the pipe and the jaw D, is then pushed
forward by pressing against the projection 9, until both jaws are in contact with the
pipe, the spring H, allowing the teeth on the portion D', to ride over the teeth in the
shank A, when the jaws are adjusted and the wrench turned in the proper direction
the jaws gripping the pipe will cause the jaw D, to be forced towards the shank A,
the spring F, allowing the jaw to be pressed inwards while the teeth firmly hold the
outer end so that the greator the pressure on the handle of the wrench the greater
will be the grip of the jaws. When desired to release the hold upon the pipe, the
wrench is turned in the opposite direction, the teeth in the face of the jaw D, being
cut in the reverse direction to those in the jaw B, so that they will grip only when the
wrench is turned in one direction.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated to me by my
foreign Correspondent I declare that what I claim is :-
1. In a pipe wrench the combination of a fixed jaw and shank provided on its
under side with ratchet teeth, with a movable jaw D, provided with a hinged portion D',
provided with teeth to fit the ratchet teeth in the shank, the movable jaw being
held to the shank by saddles, and springs substantially as shown and described.
2. In a pipe wrench a fixed jaw B, and shank A, provided on its underside with
ratchet teeth in combination with the jointed movable jaw D, D', the portion D¹,
being provided with teeth to fit the teeth in the underside of the shank, saddles E, G,
and springs F, H, substantially as shown and described.
3. The combination of a wrench shank provided with ratchet teeth on its inner side
a jaw fixed on said shank and having inwardly inclined serrations, a sliding jaw having
outwardly inclined serrations and movably connected to a tail piece having ratchet
teeth for engaging the teeth on the shank, a saddle embracing said shank and fixed to
the sliding jaw and a spring interposed between the sliding jaw and the inner side
of said shank, and a saddle embracing said shank and fixed to the tail of the sliding
jaw and a spring interposed between the outside of the shank and the said saddle
substantially as described.
4. The combination of a wrench shank provided with ratchet teeth on its under
side, a fixed jaw on said shank having inwardly inclined serrations, a jointed sliding
jaw having outwardly inclined serrations and the tail portion having ratchet teeth for
engaging the teeth on the shank loops or saddles embracing said shank one being
⚫fixed to the forward end of the movable jaw and the other to the tail portion said
loops being considerably larger than said shank whereby the movable jaw has lateral
play thereon, a socket in the inner face of the movable jaw near its outer end, a
spiral spring inserted in said socket, bearing against the underside of said shank
for pressing the movable jaw outward therefrom and a spring interposed between
the rear loop and the upper side of said shank for drawing the tail portion of the
sliding jaw towards the shank to cause the teeth thereon to engage the teeth on the
shank substantially as described.
Dated this 29th day of January 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.