An Improved Pipe Wrench.
Year: 1895

page_text: Date of Application, 11th Sept., 1895
Complete Specification Left, 6th June, 1896-Accepted, 11th July, 1896
KRUVIDIONAL
DI MUITIVATIVA.
An Improved Pipe Wrench.
We, WILLIAM HOUGHTON, Blacksmith and JOHN LINDSAY, Machinist, both
of the Paris Tool Manufacturing Company, Limited, Paris, County of Brant,
Province Ontario, Dominion of Canada, do hereby declare the nature of this
invention to be as follows:-
The pipe wrench of this invention comprises firstly, a hollow double clip and
toothed tail piece terminating in two lugs, all in one piece. Secondly, a stem
having ratchet teeth on the lower side in which engage corresponding teeth formed
in the hollow double clip. Thirdly, a jaw head provided with ratchet teeth and
pivotted to one end of the double clip with a little play or slightly movable on its
pin to permit the easy release of the jaws. Fourthly, a spiral spring located in a
recess in the back part of the double clip and having for object to lock the jaws
at any desired distance apart, by springing the teeth of the clip upwards into
engagement with the teeth of the stem, one end of the stem having teeth which
come opposite the teeth of the jaw head and between which two sets of teeth the
pipe is gripped.
Dated this 11th day of September 1895.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.
We, WILLIAM HOUGHTON, Blacksmith and JOHN LINDSAY, Machinist, both
of the Paris Tool Manufacturing Company, Limited, Paris, County of Brant,
Province Ontario, Dominion of Canada, 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 :-
In the accompanying drawing
Fig. 1 is a side view of a pipe wrench of this invention and locked.
Fig. 2 a similar view of the wrench unlocked.
Fig. 3 an end view of a double clip.
Fig. 4 a side view of the movable head, or front working jaw detached.
Fig. 5 a side view of the seat lock detached.
Fig. 6 a top view of the wrench.
A is the double clip formed with two hollow projections a, b, through which
may slide forward and backward the stem B which underneath at about the middle
portion is provided with ratchet teeth d made to engage with corresponding ratchet
teeth e formed in the under or horizontal part of the clip A, the said part of the
clip being elongated and terminating in two lugs f which pass up on cach side of
the stem B and keep it steady and in alignment with the clip.
C is the head or front working jaw pivotted to the double clip A by a pin D
passing through the hole g. The rear end of said head is slightly tapering at the
points, x, and the extreme end y is bevelled so as to permit a slight upward

page_text: movement of the head before it abuts against the clip for the purpose of allowing
the head to release a gripped pipe, which may be done when the handle of the
stem is raised, this being an important advantage as the releasing can be quickly
effected without readjustment of the wrench.
In order to lock the teeth of the stem and clip firmly together a recess his
formed in the rear end of the double clip A, leaving an external orifice i into
which is inserted a seat lock E formed as shewn in Fig. 5, having a projecting
toej provided with a stud s, a heel projection k, a recess l, a thumb projection m
and two planes n, o, so that when one plane is exactly horizontal the other will be
at a slight upward angle. A spiral spring G is made to rest in the recess / when
the seat lock is placed in the recess h, the studs serving to steady the spring. q is
a notch in the outside of the clip A above the entrance to the recess h to hold the
lock E by its heel k when unlocked.
The teeth c on the end of the stem B are formed to draw downwards on a pipe F
whilst the teeth p on the head C are formed to draw on a pipe upwards, which
facilitates its rotation.
The operation of the device is as follows:- -The seat lock E is drawn out and
pulled upwards until its heel k falls into the notch in the clip A. It is held
in that position by the spiral spring G, as in Fig. 2, while the jaws are adjusted to
the width required of the pipe to be operated on. The teeth d on the stem B and
the teeth e on the clip A are then immovably engaged by simply pressing the outer
end of the lock E downwards, the spring G then drawing said lock into the
recess as far as it will go and the parts are rigidly held together as in Fig. 1, for
operating on a pipe, which is done from the handle. A tight grip on the pipe is
further secured by making the teeth p of a different pitch to the teeth c, and the
slight movability of the head C enables the jaws to grip tight and release easily as
they cannot wedge.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a pipe wrench, a double clip constructed with two openings to receive a
toothed headed stem provided with ratchet teeth, to slide therein, the upper face of
the lower portion of the clip having ratchet teeth cut therein, the said portion
elongated and terminating in two lugs which pass up on each side of the stem,
when inserted in the double clip, and a spring seat lock to lock the jaws at any
desired distance apart, substantially as described and shewn.
2. In a pipe wrench, a double clip A having openings a, b, ratchet teeth e on the
lower portion and terminating in two lugs f, a stem B having corresponding ratchet
teeth d made to slide in the clip portions a, b, and to engage in the ratchet teeth e
on the clip, the head of the stem B having ratchet teeth con a bevel and a movable
jaw head with an inward pitch of its teeth constructed as shewn and pivotted to
the clip A by the pin D, substantially as described and shewn.
3. In combination with the stem B, movable jaw head C, and double clip A,
the recess h in the clip, the seat lock E with two bottom planes n, o, toe piece j,
studs, heel k, recess 1, thumb piece m, and a spiral spring G, let into the recess to
operate said seat lock to hold the ratchet teeth d, e, together to lock the gripping
jaws of stem and head at any desired distance apart, substantially as described
and shewn.
4. In combination with the double clip A and seat lock E, the notch q formed in
the end of the rear part of the clip to receive the heel of the seat lock when
drawn out to unlock the teeth, substantially as described and shewn.
Dated this 6th day of June 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.