Improvements in Wrenches.
Year: 1893

page_text: Date of Application, 6th Feb., 1893
Complete Specification Left, 8th Feb., 1893-Accepted. 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Wrenches.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., The
General Patent Office, No. 4, South Street, Finsbury, in the County of London,
Patent Agents, do hereby declare the nature of this invention (a communication to
me by William Henry Smith of 456, West 14th Street, New York in the United
States of America, Contractor) to be as follows:-
This invention relates to wrenches and it has for its object the provision
of a device, simple in construction, inexpensive in manufacture, that is readily
adjustable, is self locking and that has a strong grip, thus forming an efficient tool
in practical use.
In carrying out this invention I employ a body bar or shank which terminates
in a laterally projecting stationary and preferably integral portion, forming a jaw,
provided with a grooved or serrated inner edge. The shank is provided with a
longitudinal series of grooves or serrations located on one edge of the same, and
terminates at its lower end in an exteriorly screw threaded rod upon which may be
placed a handle constructed of wood or other approved material, the parts being
held in a proper relation by means of a nut constructed and arranged to work on
the screw threaded rod.
A laterally projecting movable jaw is carried by a casing capable of sliding on
the shank and is pivoted within a recess of the same. The movable jaw has a heel
below the pivot thereof and a spring bears against the said heel, holding the same
normally in an inward relation. The said spring is inserted in a screw threaded
orifice formed in the said casing and is held in proper position by means of a
securing screw. The upper edge of the jaw is also grooved or serrated.
Below the movable jaw and also located within the casing is placed in the recess
a self locking pivotted dog provided at its lower extremity with a sharp pointed
edge constructed and arranged to engage with the serrations of the shank. The
upper portion of the dog is held in an outward relation by means of a spring
located between the said dog and the wall of the casing.
In order to disengage the parts so that the casing and movable jaw may be slid
along the shank, the thumb of the operator may be pressed against the upper
portion of the dog above the pivot and the forefinger may be placed in a recess
resting against the finger lug.
Dated this 6th dox of Fehru 1802
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wrenches.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., The
General Patent Office, No. 4, South Street, Finsbury, in the County of London,
Patent Agents, do hereby declare the nature of this invention (a communication
to me by William Henry Smith, of 456, West 14th Street, New York, in the
United States of America, Contractor) 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 wrenches and it has for its object the provision of a
device, simple in construction, inexpensive in manufacture, that is readily

page_text: adjustable, is self locking, and that has a strong grip thus forming an efficient tool
in practical use; and it consists in the construction and arrangement of parts
pointed out in the following Specification and claims, and illustrated in the accom-
panying drawings in which A, represents the body bar or shank of my wrench
which terminates in a laterally projecting stationary and preferably integral
portion A², forming a jaw, provided with a grooved or serrated inner edge a², the
shank A, is provided with a longitudinal series of grooves or serrations a, located
on one edge of the same, and terminates at its lower end in an exteriorly screw
threaded rod a', upon which may be placed a handle B, constructed of wood or
other approved material, the parts being held in a proper relation by means of a
nut B¹, constructed and arranged to work on the screw threaded rod a¹.
A laterally projecting movable jaw C, is carried by a casing F, slidable on the
shank A, and is pivoted at C, within a recess f; of the same. The movable
jaw C, has a heel C³, below the pivot C, thereof, and a spring D, bears against
said heel, holding the same normally in an inward relation. The said spring D, is
inserted in a screw threaded orifice f2, formed in said casing F, and is held in
proper position by means of the securing screw E, the upper edge C2, of the
jaw C, is also grooved or serrated-the serrations a², and C³, both preferably
projecting away from the shank A.
Below the movable jaw C, and also located within the casing F, is placed in the
recess, a self locking dog G, pivoted at G¹, and provided at its lower extremity
with a sharp pointed edge G2, constructed and arranged to engage with the
serrations a, of the shank A. The upper portion of the dog G, is held in an
outward relation by means of the spring D', located between the said dog G, and
the wall of the casing F.
In order to disengage the parts so that the casing F, and movable jaw C, may
be slid along the shank F, the thumb of the operator may be pressed against the
upper portion of the dog G, above the pivot G', and the forefinger may be placed
in the recess F¹, resting against the finger lug F2.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :
1-A wrench substantially as herein shown and described.
2-In a wrench, a jaw rigid with the shank, in combination with another
movable jaw pivoted in a casing slidable on the shank of said wrench, and with a
spring bearing against the heel of the movable jaw.
3-In a wrench, a jaw rigid with the shank, in combination with another
movable jaw pivoted in a self-locking casing slidable on the shank of the wrench.
4-In a wrench, a jaw rigid with the shank provided with a series of serrations,
in combination with another movable jaw pivoted in a casing slidable on the
shank of said wrench, and with a self acting locking dog fulcrumed in the casing,
and constructed and arranged to engage with the serrations of the shank.
5 In a wrench, a shank terminating at one end in a rigid jaw, and at the
opposite end with a handle in combination with a laterally movable jaw pivoted in
a casing slidable thereon, and with self locking means whereby the said jaw may
be held at any desired point.
6-In a wrench, a jaw rigid with the shank and provided with serrations, and a
casing sliding on the said shank, the said casing carrying a jaw and being provided
with a recess F1 and finger lug F³.
7-In a wrench, a jaw rigid with the shank and a movable casing_slidable
thereon carrying a jaw and provided with a spring D. and securing screw E.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicaut.