Spanners.
Year: 1885

page_text: Spanners.
I HENRY BROCKAS of 105 Gilmore Road Lewisham in the County of Kent, Agent,
do hereby declare the nature of this invention to be as follows:-
I construct my improved wrench or spanner by joining two jaws in such a
manner as to be capable of sliding towards each other, their opposing faces being
always at one constant angle to the line of motion.
To one of these jaws is hinged a lever one end of which acts as the handle of the
spanner and the other or shorter, end forms a cam abutting on and supporting the
other jaw, it will be readily understood that if one jaw be arrested by a nut or
other object, the other jaw will be brought up to it by pressure on the lever thus
grasping the nut or other object with a force varying in proportion to the pressure
applied.
In order to grip hexagon nuts securely each jaw is cut to a V shape, the angle
being one of 120 degrees. I sometimes also make. the jaws double ended, one
pair of ends for hexagon nuts and round objects the other pair of ends having
flat faces.
This spanner may be made with the sliding parts closed so as to form a box
spanner or else open so as to be readily put on nuts from the side.
The jaws of this spanner may be formed with recesses capable of holding a pair
of dies for cutting threads on tubes or bars of metal, when the instrument is
intended for this purpose the hinged jaw is preferably provided with a small handle
or with a spring tending to keep it bent over towards the lever.
T
.
1007
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.

page_text: I, HENRY BROCKAS of 105 Gilmore Road Lewisham in the County of Kent,
Agent do hereby declare the nature of my invention for AN IMPROVED AUTOMATIC
WRENCH OR SPANNER and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention will be most readily understood by referring to the accompanying
drawings in which Figs. 1, 5, and 6 illustrate different forms of spanners, all
constructed on the same principle.
Two pieces of metal A & B are fitted to one another so that the part B cannot
be readily detached from A but is capable of sliding along A. Two opposing parts
or faces of A and B are shaped to an angle of 120° each in such a way that as these
faces approach each other or recede from one another the relative position of the
sides of these angles is constant and that these sides would always form four sides
of an enclosed hexagon.
Hinged to part A is the lever C, one end of which forms a handle to grasp the
spanner by, and the other end of which forms a cam abutting against part B. It
will be understood that if a hexagon nut be interposed between the opposing
jaws A and B and the lever moved so that the cam end moves towards the nut,
this cam will press the jaw B towards the nut, which will thus be firmly gripped;
the greater the pressure is applied to the end of the lever the firmer will be the
grip on the nut.
Fig. 2. shows the spanner illustrated at Fig. 1 closed; Fig. 3. shews part B
separately as suited to this form of spanner, and Fig. 4 shews side and end views
of part A separately as suited to the first described spanner.
Fig. 5 shews an open spanner with the part B separate; Fig. 6 shews an open
double-ended spanner.
Any of these spanners may have the jaws so constructed as to hold dies for the
purpose of cutting threads on tubes or cylindrical articles.
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 Wrench or Spanner composed of three pieces so joined that nuts or other
articles may be gripped by it without the intervention of any screw, rack or
connecting rod.

page_text: 2. An automatic wrench or spanner in which four sides of a hexagon nut may be
gripped simultaneously.
3. An automatic wrench or spanner composed of two jaws capable of motion
towards each other, such motion being produced by the action of a cam.
4. The box spanner illustrated in Figs. 1 and 2.
5. The open spanners illustrated in Figs. 5 and 6 of the drawings accompanying
this specification.