Year: 1889

page_text: Date of Application, 12th Feb., 1889
Specification Accepted, 11th May, 1889
EDWARD ODELL ELY of Boston in the County of Suffolk, in the State of
Massachusetts one of the United States of America, Gentleman, and of 55 Chancery
Lane in the County of Middlesex (a communication from abroad by John H. Vinton
of Boston aforesaid, Inventor) 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 has for its object the production of a durable low cost wrench, which
may be quickly applied to pipe and other objects to be turned without removing the
wrench.
My invention consists in a pipe wrench or other wrench composed essentially
of a fixed jaw having at one end serrations or teeth, and at one edge
two sets of ears or lugs and a seat, a movable 7-shaped jaw having serrations
or teeth and having its shank threaded, a rocker mounted in the seat on the
fixed jaw between the said ears, and a ring-nut applied to the shank of the movable
jaw between the said ears, one end of the said nut when the wrench is under strain
taking bearing entirely about the shank of the movable jaw and against the edges
of the ears between which the rocker is mounted, as will be described.
With the foregoing I have combined a second rocker against which the outer
edge of the shank of the movable jaw bears at times.
I have also provided the wrench described with a spring pressed plunger which
acts upon the shank of the movable jaw to prevent the jaw from being set or fixed to
a pipe, so that it cannot be readily removed, this being useful when the wrench is
being used in a contracted space.
My invention also consists in a wrench having a movable jaw provided along its
edges with teeth, the threads of which are convexed in cross section, the bottoms
of the spaces between the teeth being concaved in cross section, the said jaw receiving
upon it a ring-nut the teeth of which are made to closely fit the teeth and spaces
of the jaw.
Fig. 1, in elevation shows a wrench embodying my invention, the handle being
nartially hroken off

page_text: 212. 4, 18 long"
SCCTION Hercot, and
Fig. 3, n section in the line .r.
The fixed jaw A of the wrench will preferably be cast, but it may be formed
by forging.
The fixed jaw is provided at one ond with a toothed surface a', and at one edge
of the said jaw near the said toothed surface, the said fixed jaw has two strong
parallel ears a, a, and yet further from the said toothed surface a' the said fixed
jaw has two other shoulders or ears a³, a².
The fixed jaw between the cars a², a² is provided as shown with a curved seat a to
receive a icat at the hack of the inner rouker block which is mounted loosely
between the said ears, and also between the threaded inner edge of the shank of the
said movable jaw and the fixed jaw, the shape of the fixed jaw and the block 61
being such as to permit the said block to tip for a limited distance on the fixed jaw.
The outer ends of the ears a, a, are united by a pin or bult e on which is pivoted
and free to rock the outer rocker block c¹.
The opposite smooth faces of these two rocker blocks receive against them the
threaded edges 6, 6, of the shank of the movable-shaped jaw B, having tho
serrated biting teeth d, the said shank below the said rocker block or at its end
and between the said ears a², receiving upon it the threaded adjusting ring-nute, it
being shown as placed between the two upper ears a², a², and the lower ears a³, a³,
before described, the upper and lower edges of the said ring-nute being rounded
as at 4, and entering a pocket in the fixed jaw, the rounded edges of the not
permitting it to rock readily with the movable jaw and not come in contact with
the fixed jaw in such way as to be in any way retarded in its free movement as the
jaw is loosened from and made to grasp the pipe or other article as the wronch is boing
used.
And further it will be expressly noticed that the end of the nut e next the ears a³
bears against the said ears entirely about the shank of the movable jaw when power is
applied to the wrench, the contact of the nut with the said cars a' as described
preventing crushing strain of the wrench on the pipe.
The wrench herein shown has great strength and may be cheaply constructed.
It will be noticed, see Figs. 2 and 3, that the fixed jaw A is bored to receive a
spring as d³ and the shank of a spring pressed plunger having a head 5, the said
head being limited as to its outward movement by shoulders 8 at the inner sides of
the ears or lugs a³.
In the working of the wrench the spring pressed plunger normally stands in the
condition shown in Fig. 2, so that should the movable jaw bo set the operator may
take hold of the shank of the movable jaw and nove it in the direction of the arrow
Fig. 2, to compress the spring which will disengage the jaw quickly from the pipe,
so that the wrench may be readily moved about the pipe for a new hold.
Prior to my invention the threads of the movable shank of wrenches of the class
herein described have been made square, and the bottoms of the grooves between the
threads have been made square; but in practice it has been found that this shape of
thread and groove is objectionable, and adds greatly to the liability of the jaw
breaking when submitted to strain.
In practice it has been found that by shaping the threads of the inovable jaw as
shown and described herein, that the movable jaw has very much greater strength
with the same amount of metal.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, 1 declare that what I
clain is:
1 The herein described pipe wrench or wrench for other uses composed
essentially of a fixed jaw having at one ond serrations or teeth, and at one edge two
sets of cars or lugs and a seat, a movable 7-shaped jaw having serrations or teeth and
having its shank threaded, a rocker mounted in the seat on the fixed jaw between the
said ears, and a ring-nut applied to the shank of the movable jaw between the said

page_text: ears, one end of the said nut when the wrench is under strain taking bearing entirely
about the shank of the movable jaw and against the edges of the ears between which
the rocker is mounted, substantially as described.
2: The fixed jaw A of the wrench it having the serrated portion a¹, ears a³, a²,
and a², a³, and seat a; and the movable-shaped jaw having the serrated portion di
and threaded shank, combined with the rockers 6', c' mounted between the ears a³, a³
the rocker 6' being placed between the inner threaded edge of the movable jaw and
the fixed jaw, and with the ring-nut applied to the threaded shank of the movable
jaw outside the said ears a³ and at the ends of the said rockers, the combination
being in operation as shown and described.
3:-The heroin described pipe wrench or wrench for other uses composed essentially
of a fixed jaw having at one end serrations or teeth, and at one edge two sets of
ears or lugs and a seat, a movable 7-shaped jaw having serrations or teeth and
having its shank threaded, a rocker mounted in the seat on the fixed jaw between
the said ears, and a ring-aut applied to the shauk of the movable jaw between the
said ears, one end of the said nut when the wrench is under strain taking bearing
entirely about the shank of the movable jaw and against the edges of the ears between
which the rocker is mounted, and a spring pressed plunger acting upon the shank of
the movable jaw to operate, substantially as described.
4: The combination with the fixed jaw having serrations, of a movable -shaped
jaw having serrations, and having a shank the threads of which are convexed in cross
section, and having grooves between the said teeth which are concaved in cross
section at their bottom, and a ring-nut engaging the said threaded shank to operate,
substantially as described
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.