A Detached Serrated Appliance, applicable to Spanners, Wrenches, and other Tools, for Gripping Tubes and other Cylindrical Objects.
Year: 1895

page_text: Date of Application, 9th Jan., 1895
Complete Specification Left, 3rd Oct., 1895-Accepted, 9th Nov., 1895
PROVISIONAL SPECIFICATION.
A Detached Serrated Appliance, applicable to Spanners, Wrenches,
and other Tools, for Gripping Tubes and other Cylindrical
Objects.
I, FREDERICK THEODORE WOODSON, of 375 Glossop Road, in the City of
Sheffield, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a simple detached appliance or jaw which can be
applied to and used with either solid screw keys, adjustable spanners or wrenches,
vices, and other gripping tools or implements, to enable them to hold or grip such
objects as gas or water tubes, round bars and other like cylindrical objects.
It consists of a wedge shaped piece of steel, (or iron faced with steel,) having its
upper inclined surface serrated transversely, and then hardened and tempered.
The edges of the teeth are inclined upwards or towards the thick end of the wedge,
and may be of any suitable form, number and size. The flat underside may be
roughed if desired, but this is not essential.
When the open jaws of a spanner, for example are placed over a piece of tubing
and the serrated thin end of the wedge is pushed in between the tube and the jaw
with its teeth against the tube, the tube will be gripped and can be turned, and by
reversing the wedge so that its serrations are on the opposite side of the tube, the
tube can be turned in the opposite direction.
Dated the 8th day of January 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
A Detached Serrated Appliance, applicable to Spanners, Wrenches,
and other Tools, for Gripping Tubes and other Cylindrical
Objects.
I, FREDERICK THEODORE WOODSON, of 375 Glossop Road, in the City of
Sheffield, Manufacturer, do hereby declare the nature of this invention and in
what manner the same has to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to a detached, serrated, wedgeshaped appliance to be used
either with the common screw-key, adjustable spanner, or other like tool, for the
purpose of enabling such tools to grip and turn, gas pipes, and other round objects
like the ordinary pipe wrenches or hooks.
Its small size enables a workman to carry it without inconvenience, and any
screw-key can be instantly transformed into a pipe wrench without alteration
The appliance is illustrated in the annexed drawing, in which;
Fig. 1, is a perspective view of the appliance.
Fig. 2, shows the method of using it.

page_text: It consists of a wedge-shaped piece of wrought steel, or of iron faced with steel,
of any suitable length and width, having one of its faces cut or serrated, or
otherwise toothed, the serrated side being hardened and tempered.
Preferably it is toothed as shown, the teeth A, inclining upwards or towards the
thick end of the wedge B, and the teeth which are made sharp and hard may be of
any desired size and number.
The underside may be roughened if preferred but this is not essential.
When the open mouth of the screw-key C, is passed over a length of pipe D,
and the thin end of the appliance is inserted between the jaw of the screw-key and
the pipe, with the teeth towards the pipe, and the screw-key turned in the proper
direction, the pipe will be firmly gripped by the sharp teeth aforesaid, and can
be turned. The greater the force applied, the firmer will be the grip upon the
pipe.
If the appliance is inserted above the pipe, the grip will be in the opposite
direction, and if the screw-key is turned in the contrary direction, the pipe will be
at once released.
I am aware that cast metal serrated wedges are used for "wedging "purposes
and I therefore make no claim for such broadly.
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
-
1. A serrated wedge-shaped appliance, or detached jaw, for use with screw-keys
or spanners, to enable such tools by means of its sharp and hardened teeth to grip
piping and other round objects, as herein set forth and illustrated.
2. A loose or detached wedge-shaped appliance having one of its flat or slightly
rounded sides serrated, the teeth being sharp and hardened and the opposite
side plain, for the purpose specified, and substantially as described and shown.
Dated the 2nd day of October 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.