Year: 1888

page_text: Date of Application, 21st Jan., 1888
Complete Specification Left, 19th Oct., 1888
Complete Specification Accepted, 23rd Nov., 1888
I, HENRY WILLIAM ATWATER, of East Orange, county of Essex, state of New
Jersey, U.S.A. Manufacturer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide a cheap and simple construction for the
removable jaw which is sometimes applied to the bar of a monkey wrench, which class
of wrenches have a fixed and movable jaw adjustable to grip the desired object.
It is common in pipe wrenches to incline the jaws toward one another, and to
roughen one of such jaws that a pipe or bolt may be rolled by such roughened jaw
into the converging space and become jammed, so that it may be turned by the move-
ment of the wrench.
The teeth formed upon the roughened jaw are subjected to great wear and strain,
and when worn smooth cease to operate. By forming such teeth upon an auxiliary
jaw which may be readily applied to the bar of the wrench, and lie upon the face of
one of the permanent jaws; an artificial wearing surface is provided which may be
renewed at slight expense, and the removal of which fits the wrench for use upon nuts
and bolt heads.
Heretofore such removable jaws have been made with a fork or slot at their rear
ends to fit the bar of the wrench, requiring long lugs extended beyond the bar, and
necessitating attachments of a more or less expensive character to hold the jaw upon
the bar.
The improvement consists in making the jaw with the required opening in the form
of a permanently open socket upon the side of the jaw, the bar being embraced
between the jaw and a single short lug at the rear of the socket.
The lug may be made thin and adapted to hold the jaw upon the bar by elastic
pressure, or it may be made rigid and a plain thumb screw inserted through it to
alamn the rear side of the bar.

page_text: By this construction the socket is made much more shallow than heretofore, and is
so presented upon the side of the jaw, that the jaw may be wholly formed of steel by
the process of drop forging, and the shallow socket readily milled out with much less
expense than a deep notch or slot in the rear of the jaw, which requires milling
cutters of very large diameter.
The form of the removable jaw may be considerably modified without departing
from my invention, provided the socket be formed in the side of the jaw.
The serrated face of the jaw may therefore be tapered toward the bar or outward
from the bar, or it may be made of V-form or concave, in which latter case it is
adapted to grip a round object when turning the wrench in either direction.
Dated this 21st day of January 1888.
ALLISON BROS.,
Agents for the Applicant.

page_text: I, HENRY WILLIAM ATWATER, of East Orange, county of Essex, state of New
Jersey, U.S.A. Manufacturer, 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 :-
The object of this invention is to provide a cheap and simple construction for the
removable jaw which is sometimes applied to the bar of a monkey wrench, which
class of wrenches have a fixed and movable jaw adjustable to grip the desired
article.
It is common in pipe wrenches to incline the jaws toward one another, and to
roughen one of such jaws that a pipe or bolt may be rolled by such roughened jaw
into the converging space and become jammed, so that it may be turned by the move-
ment of the wrench.
The teeth formed upon the roughened jaw are subjected to great wear and strain,
and when worn smooth cease to operate. By forming such teeth upon an auxiliary
jaw which may be readily applied to the bar of the wrench, and lie upon the face of
one of the permanent jaws, an artificial wearing surface is provided, which may be
renewed at slight expense, and the removal of which fits the wrench for use upon nuts
and bolt heads.
Heretofore such removable jaws have been made with a fork or slot at their rear
ends to fit the bar of the wrench, requiring long lugs extended beyond the bar, and
necessitating attachments of a more or less expensive character to hold the jaw upon
the bar.
The improvement consists in making the jaw with the required opening in the form
of a permanently open socket upon the side of the jaw, the bar being embraced
between the jaw and a single short lug at the rear of the socket.
The lug may be made thin and adapted to hold the jaw upon the bar by elastic
pressure, or it may be made rigid and a plain thumb screw inserted through it to clamp
the rear side of the bar.
By this construction the socket is made much more shallow than heretofore, and is
so presented upon the side of the jaw, that the jaw may be wholly formed of steel by
the process of drop forging, and the shallow socket readily milled out with much less
expense than a deep notch or slot in the rear of the jaw, which requires milling cutters
of very large diameter.
'
The invention will be understood by reference to the annexed drawing in which
Fig. 1 is a side view of a wrench of the class shown in my Patent No. 2598
of 1883.
Fig. 2 is a side view of the upper part of such wrench with the removable jaw
formed with a sloping serrated face at right angles to the bar.
Fig. 3 and 4 are side views of the jaw detached from the wrench, that in Fig. 3
having the serrated face i inclined from both directions toward the middle of the jaw,
and Fig. 4 having a concave serrated face j.

page_text: Fig. 5 represents in plan all of the jaws shown in the other figures.
a is the bar of the wrench, the handle, c the head, and d the slide; the latter
being shown at right angles with the bar in Fig. 1, and the serrated face of the jaw
being sloped or tapered to co-operate therewith in grasping a pipe or bolt.
In Fig. 2 the slide is formed with a sloping face d' adapted to co-operate with the
jaw h which is made of parallel thickness to fit the inner side of the head c.
The socket upon the jaw is shown at e in Fig. 5, with the clamp screw of shown
inserted through the lug at its rear side to press upon the block of the bar a, as shown
in Figs. 1 and 2.
The removable jaw may be applied to the face of the slide d if desired, instead of
the under side of the head c.
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 :-
1st. The removable jaw for bar wrenches provided with the socket e open at one
side and fitted to the bar of the wrench, as and for the purpose set forth.
2nd. The removable serrated jaw for bar wrenches provided with the socket e open
at one side and fitted to the bar of the wrench, and having a set screw inserted through
the rear side of the socket to press upon the bar of the wrench, as and for the purpose
set forth.
בד