Improvements in Tools for Fixing or Extracting Screw-studs, and for other like purposes.
Year: 1895

page_text: Date of Application, 28th May, 1895
Complete Specification Left, 6th Aug., 1895-Accepted, 7th Sept., 1995
PROVISIONAL SPECIFICATION.
Improvements in Tools for Fixing or Extracting Screw-studs, and
for other like purposes.
I. WALTER Fox, of 40 Wood Street, Ladywood, in the City of Birminghain,
Engineers' Foreman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in tools for fixing or extracting screw
studs and for other like purposes, my object being to construct a compact and
simple tool with which screw studs and other articles may be rapidly and securely
gripped and turned in the required direction for fixing or for extracting.
In carrying my invention into effect I turn or form the body of my improved
tool from steel or other metal providing an enlarged head or flange at one end,
with a square or other stalk at the opposite end for attachment of a spanner, key,
or other suitable and ordinary appliance for turning or revolving the tool. Through
the head or flange I cut or form a groove or slot, preferably slightly dovetailed or
undercut, for the reception of steel sliding jaws or grip wedges which are placed
on opposite sides of the central hole formed partially or entirely through the tool.
To more effectually retain the sliding jaws or grip wedges in position, I sometimes
attach a cover plate to the extremity of the head or flange preferably by means of
small studs or counter-sunk head screws, slots or apertures being formed through
the cover plate to receive retaining lugs projecting from the jaws or wedges, and a
central hole being also provided to pass over the stud or other article to be
gripped.
The face of the sliding jaws or wedges have teeth or serrations and the jaws are
so placed in the slotted head of the tool that when caused to slide in opposite
directions, the thick ends approach each other and the interposed stud or other
article is very tightly gripped in the jaws. The central hole formed in the tool
permits of its being passed over the stud or other article, and when the tool is
turned or revolved the initial contact of the article with the wedges causes them
to slide in opposite directions and thus to take a very tight hold.
I sometimes so form the jaws as to permit of their reversal thus making the one
tool with one pair of wedges available either for fixing or for extracting studs; or
I employ two pairs of jaws or wedges, the one set being formed suitably for fixing
and the other set for extracting studs and like articles.
I vary the form of my improved tool and the arrangement of the sliding jaws or
wedges to suit special services or requirements without departing from the essential
features of my invention.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.

page_text: Improvements in Tools for Fixing or Extracting Screw-studs, and
for other like purposes.
I, WALTER Fox, of 40 Wood Street, Ladywood, in the City of Birmingham,
Engineer, 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 tools for fixing or for extracting screw
studs and for other like purposes, my object being to construct a compact and
simple tool with which screw studs and other articles may be rapidly and securely
gripped and turned in the required direction for fixing or for extracting.
In the two accompanying sheets of explanatory drawings to be hereinafter
referred to;—
Figure Sheet 1 is a front elevation representing my improved tool with a
screw stud gripped between its jaws.
Figure 2 is an inverted plan of the tool and Figure a similar view with the
cover plate removed.
Figure 4 is a side elevation and Figure 5 a plan of one of the sliding jaws or
wedges.
Figure 6 Sheet 2 is a plan and Figure 8 an end elevation representing my
improved tool as arranged for gripping and turning screwed piping and for like
purposes.
Figure 7 is a plan of the tool with the cover plate removed.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I turn or form the body A of my improved
tool from steel or other metal providing an enlarged head or flange such as A at
one end with a square or other stalk A at the opposite end, as shown in Sheet 1,
for attachment of a spanner, key or other suitable and ordinary appliance for
turning or revolving the tool. Through the head or flange I cut or form a groove
or slot A, preferably slightly dovetailed or undercut, for the reception of steel
sliding jaws or grip wedges B, which are placed on opposite sides of the central
hole A, formed partially or entirely through the tool. To more effectually retain
the sliding jaws or grip wedges B in position, I sometimes attach a cover plate C
to the extremity of the head or flange A, preferably by means of small studs or
counter sunk head screws C¹, slots or apertures C³, being formed through the
cover plate to receive retaining lugs B', projecting from the jaws or wedges, and a
central hole being also provided to pass over the stud D, or other article to be
gripped.
The inclined faces of the sliding jaws or wedges have teeth or serrations as
shown at Figures 4 and 5, and the jaws are so placed in the slotted head of the
tool or holder that when caused to slide in opposite directions, the thick ends
approach each other and the interposed stud or other article is very tightly gripped
in the jaws. The central hole formed in the tool permits of its being passed over
the stud or other article, and when the tool is turned or revolved, the initial
contact of the article with the wedges causes them to slide in opposite directions
and thus to take a very tight hold.
To prevent the retaining lugs B', from pressing hard against the ends of the
slots C, in the cover plate C, 1 sometimes grind or cut away the ends B2,
(Figures 4 and 5). I thus ensure that the grip of the jaws or wedges on the screw
stud shall be released before the ends of the lugs B', come into contact with the
ends of the slots C³.
I sometinies so form the jaws as to permit of their reversal, thus making the one
tool with one pair of wedges available either for fixing or for extracting studs; or

page_text: I employ two pairs of jaws or wedges, the one set being formed suitably for fixing,
and the other set for extracting studs and like articles. In the construction of my
improved tool for the purpose of gripping and turning screwed piping and for
other purposes, I preferably mount the sliding bars or grip wedges B in the wrench
or like tool head E as shown on Sheet 2. The wedges are retained in position
preferably by means of a cover plate E', and the movement of the wedges is
limited by pegs such as F and by the hook like attachment G, or by other suitable
means.
I vary the form of my improved tool and the arrangement of the sliding jaws
or wedges to suit special services or requirements without departing from the
essential features of my invention.
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 tool for fixing or extracting screw studs and for other purposes having a
pair of gripping jaws or wedges arranged substantially as herein described.
2. In tools for extracting screw studs and for other like purposes the combination
of a pair of sliding jaws or wedges with a tool or holder having a central hole for
the admission of the screw stud, a slotted head or flange at one end of the body
and a square or other stalk at the opposite end, substantially as hereinbefore
described and as illustrated in the accompanying drawings.
3. The combination and arrangement of gripping jaws or wedges with a wrench
or like tool substantially as and for the purposes herein before described and as
illustrated in the accompanying drawings.
Dated this 6th day of Awoust 1895
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.