Improvements in Folding Pocket Screw-wrenches or Spanners.
Year: 1898

page_text: COMPLETE SPECIFICATION.
Improvements in Folding Pocket Screw-wrenches or Spanners.
I, CARL BACH, of Dortmund, in the Empire of Germany, Civil 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:-
The present invention relates to folding screw-wrenches or spanners adapted to
be carried in the pocket or the pouch of the cyclist, and has for object to provide
a tool of the said description which, consisting of several parts suitably hinged
together and having each one or more differently sized and shaped jaws, can
easily be folded up into a small compass and will serve for operating nuts of
various sizes and conformations. Owing to its handy size when folded up the
new or improved screw-wrench or spanner will be found specially adapted for the
use of cyclists and other persons requiring an efficient tool of that class which,
without inconvenience, can be carried in the pocket. .
Reference being had to the accompanying sheet of drawings in which the new.
folding screw-wrench or spanner is fully illustrated, Fig. 1 is a top view, one of
the component parts being opened, ready for use;
Fig. 2 is a side view of Fig. 1.
Fig. 3 shows a longitudinal section through the centre of the screw-wrench in
its folded up state.
Fig. 4 shows longitudinal sections of the component parts of the tool.
The new or improved screw-wrench or spanner consists of the middle or main
part A and two side pieces B and C which in their contours or outline follow
that of the centre piece and are hinged to the latter in such manner that, when
folded up, they will enter the projecting rims D of part A and lie close against
the plate of A.
Both side pieces B and C have their free ends widened in the form of a circle
and are there provided with several jaws of various sizes and forms, three
jaws being shown in the drawing, while the centre piece A has in the centre of
its circular end one hexagonal jaw aperture F which may be made to correspond
with the largest sized nut for which the tool may be intended to serve.
The tool as described may be improved by the addition of screw driver G which
may be secured to the upper end of centre piece A as shown in the drawing.
It is obvious that a screw-wrench or spanner constructed in accordance with
this invention may be so arranged as to fit all the nuts occurring in any parti-
cular piece of machineary, for instance a cycle. The tool can be carried in the
pocket without inconvenience, owing to its capacity of being folded up, its com-
pactness, its small size and its comparatively light weight.
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:
A new or improved screw-wrench or spanner, consisting of three component
parts AB and C. corresponding to each other in their sine
11°

page_text: tours, and hinged together in such manner as to admit of their being folded up
against each other, the two side portions B and C being provided at their free
ends with several differently sized and shaped jaws E, while the part A has one⚫
central jaw aperture F, preferably of hexagonal shape and suitable size, and
carries, secured to its rim, a screw-driver G, substantially as hereinbefore
described and illustrated in the accompanying drawings.