Improvements in Shifting Spanners.
Year: 1893

page_text: Date of Application, 20th Oct., 1893-Accepted, 25th Nov., 1893
COMPLETE SPECIFICATION.
Improvements in Shifting Spanners.
I, AUGUST BODENSTEDT Junior of Kaiserstrasse Bremen, Germany, Manu-
facturer 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 :-
One part of this invention consists in the means whereby the two main parts of
the shifting spanner are held together viz. by a special spring connection; another
part consists in means for preventing undue strain ou and wear of the jaws, while
also assisting in holding the two parts together.
In the accompanying drawing I show the invention applied to a shifting screw
spanner, Figure 1 being an elevation and Figure 2 part longitudinal section ;
Figure 3 is a part longitudinal section of a modified form of screw spanner.
The screw spanner Figures 1 and 2 consists of the hollow handle b provided
with the jaw c in this case as an example made two sided or T shaped. The
hollow handle is bored out to receive the sleeve d provided with nut part e and
with end part or head f which latter may be hexagon as shewn or milled or of other
suitable form.
Near the head f the sleeve d has a transverse through hole or recess wherein
is fitted a spring bolt a consisting of a helical spring with one or two heads pro-
truding into an annular recess 9 formed in the interior of the handle b for the
purpose of thus retaining the sleeve d in the handle 6 while capable of turning
therein to the right or left. The upper jaw c' has a stem i terminating in a screw
which engages with the nut e so that by turning the sleeve d the jaws can be
shifted apart or towards each other. The set screw 7 engaging with a length
groove k in the stem i serves as a guide during its longitudinal movement and as a
stop to prevent it from coming quite out. The handle and jaw c may be made
in one or more parts.
If it is required to take the tool to pieces the set screw is removed and the
two heads of the bolt a are pushed in by means of pegs inserted in the small holes m,
the spring bolt having been brought exactly opposite them.
In the modification Figure 3 the two parts d and are held together by means
of a feathering metal ring h connected to the hollow handle b by means of screws ¿¹,
the said ring fitting an annular recess g formed in the sleeve d so as to turn therein.
The sleeve d is at its lower end made to fit in the hollow handle band has a round
(or otherwise shaped) head f. In order to prevent undue wear and strain on the
jaws and bending of the stem k as well as for in many cases preserving the nut, or
other part gripped by the jaws, from injury; the jaw c is provided with a set
screw n which when screwed up with its head against the jaw c¹ receives a great
part of the strain and prevents the stem k from bending while at the same time
preventing undue strain and wear on the gripping faces of the jaws. This screw n
is also applicable to the construction shewn in Figures 1 and 2. To remove the
sleeve d the screws ¹ have merely to be screwed out of the feathering ring h.
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. In a shifting spanner the application and use of the spring bolt or feathering
ring working in an annular recess g as set forth for the purpose of securely
connecting the parts and for easy disconnecting.

page_text: 2. In a shifting spanner the application and use of the set screw n as set forth
for the purpose of preventing bending of the stem of the outer jaw and preventing
undue strain and wear of the gripping surfaces of the jaws.
3. The constructions of shifting spanner shewn and described.
Dated this 20th day of October 1803
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.