Improvements in the Construction of Adjustable Spanners, Wrenches, or Keys.
Year: 1894

page_text: Date of Application, 5th Nov., 1894-Accepted, 8th Dec., 1894
COMPLETE SPECIFICATION.
Improvements in the Construction of Adjustable Spanners, Wrenches,
or Keys.
I, CARL BECHER of Eckesey in Westfalia in the Empire of 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 :-
This invention relates to keys for moving bolts and nuts and similar operations,
usually termed spanners or wrenches and it consists in providing a handle, having a
rigid jaw, with a passage way transversely through said handle in the plane of said
jaw but at an angle to the key face of said jaw, this passage way being intended for
reception and longitudinal guiding of the shank of a movable jaw which movable
jaw is fixed or made integral with its shank and has its key face parallel to the key
face of the jaw which is fixed to or integral with the handle.
This construction is shown in the annexed drawing in side elevation in Fig. 1, in
plan in Fig. 2, and a section of the handle is shown in Fig. 4. Fig. 3 shows a
double or twin spanner on the same system.
a is the handle which for reducing its weight may be of H or dumb-bell section
as shown in Fig. 4. is the fixed jaw which projects laterally from the end of the
handle and preferably so that its key face forms an angle of 120 degrees with the
handle. d is the passage way through the handle a, which passage way is shown
as passing perpendicularly to the side faces of the handle, thus being at an angle
with the key face of jaw b, this angle being preferably 30 degrees. e is the jaw at
the end of shank c which is guided in passage d, the key face of said jaw e being in
this instance at an angle of 150 degrees to its shank so that it is always parallel
to the face of jaw b. f is a pin preventing the shank from falling out of the
passage d.
It will be obvious from the positions and nuts shown in dotted lines that the
sliding of shank c causes the faces of jaws 6 and e to approach or recede within
limits.
The twin spanner shown in Fig. 3 can be adjusted at the one or other of its ends
to nuts or bolt heads between the relative diameters of one and three.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
1. The key, spanner, or wrench having a handle with passage way d and jaw b,
and a jaw e with shank e guided in said passage way these several parts or features
being relatively placed in the manner described.
C
2. The twin spanner key or wrench having at each end an arrangement of parts
comprising jaw e on shank c adapted to slide in passage way d transversely placed
in handle a and at an angle to jaw bon said handle with which jaw b the jaw e is in
parallel, substantially as set forth.
3. The improved spanner key or wrench constructed as described and illustrated.
Dated this 5th day of November 1894.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.