Improvements in Wrenches and Screw Keys.
Year: 1891

page_text: Date of Application, 10th Mar., 1891
¡omplete Specification Left, 10th Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Wrenches and Screw Keys.
We, ALBERT HORROBIN, of 87, Manchester Road, Hollinwood, Gentleman,
and FREDERICK LEECH LEECH, of Wade Street, Middleton Junction, Engineer,
both in the County of Lancaster, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in pipe wrenches and screw keys and has
for its object to simplify their construction and manipulation and give the same a
larger range of grasp than heretofore has been the case.
To this end we form the pipe wrench or screw key with a movable and a
relatively fixed jaw the former being hinged to the latter. The said movable jaw
at the back passed its fulcrum is formed with a nose adapted to bear against an
incline, projection or dog arranged on the relatively fixed jaw. The said incline,
projection or dog, by means of a suitable screw, is made adjustable at the back of
the relatively fixed jaw, so as to be retained in position thereon nearer to or
further away from the nose of the said movable jaw and thus permit of regulating
the range of grasp of the wrench or screw key accordingly.
The inner surface of one or both of the said jaws may be furnished with teeth or
otherwise formed to serve either as a pipe wrench or screw key.
Dated this 9th day of March 1891.
F. BOSSHARDT & Ce
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements in Wrenches and Screw Keys.
We, ALBERT HORROBIN, of 87, Manchester Road, Hollinwood, Gentleman,
and FREDERICK LEECH LEECH, of Wade Street, Middleton Junction, Engineer,
both in the County of Lancaster, 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 relates to improvements in pipe wrenches and screw keys and has
for its object to simplify their construction and manipulation and give the same a
larger range of grasp than heretofore has been the case.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a side view and
Fig. 2 a plan of a pipe wrench and
Fig. 3 a side view of a screw key, constructed in accordance with our
invention.
In carrying out our invention and referring to the figures generally, we form the
pipe wrench or screw key with a movable and a relatively fixed jaw a & b
respectively, the former being hinged to the latter by means of a stud c passed
through the same and rivetted at each end. The jaw b is formed with a lug b' and
the movable jaw a with a slot a¹ which receives the lug b' or otherwise as may be
found most convenient. The movable jaw a at the back passed its fulcrum C is
formed with a nose d, adapted to bear against an inclined projection or dog e
arranged to slide on the relatively fixed jaw b. The inclined projection or dog e,
by means of a suitable screw, is made adjustable at the back of the relatively
ID... Ը

page_text: fixed jaw b so as to be retained in position thereon nearer to or further away from
the nose d of the movable jaw a and thus permit of regulating the range of grasp
of the wrench accordingly, as shown in dotted lines Fig. 1.
The inner surfaces of one or both of the said jaws a & b may be furnished with
teeth, as shown in Fig. 1, or otherwise formed, for instance as shown in Fig. 3, so
as to serve respectively as a pipe wrench or screw-key.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is―
A pipe wrench or screw-key, having a pivoted jaw a in combination with an
inclined projection or dog e, rendered adjustable on the relatively fixed jaw b and
forming a support for the nose d of the movable jaw a for the purpose of increasing
or decreasing the grasp of the pipe wrench or screw key, substantially as
get forth.
Dated this 9th day of December 1891.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.