Improvements in and connected with Electrical Switches.
Year: 1896

page_text: Date of Application, 11th May, 1896
Complete Specification Left, 8th Feb., 1897-Accepted, 3rd Apr., 1897
Improvements in and connected with Electrical Switches.
We MAX BINS WANGER Electrician and FRANCIS GEORGE BELL, Electrician
both of No. 71 Queen Victoria Street, in the City and County of London do hereby
declare the nature of this invention to be as follows:-
Our invention relates to certain improvements in, and connected with electrical
switches, and has for its object the opening or closing of a circuit or circuits or the
making or breaking of an electrical contact by moving a switch arm other than
that operated by the mere contact of said arni with the stud or studs. This
we effect by constructing a hollow or tubular stud in which a telescopic or plunger
stud is depressed by the switch arm against the tension or torsion of a spring or
springs.
In order that our invention may be the better understood we have appended the
accompanying sheet of drawings in which Figure 1 is a plan, and Figure 2 a
sectional elevation of one form of stud according to our said invention, and
Figure 3 is a plan view of a modification, showing the switch arm or lever, and
Figure 4 is a sectional elevation thereof. Figures 5, 6, and 7 are sectional
elevations of other modifications.
Similar letters of reference indicate corresponding parts throughout the several
views.
Referring to Figures 1 and 2, the hollow stud B is fitted into the base C of a
switch, and the pin stud A fits freely within the bore, and is retained in position
by the spring D. When the switch arm or lever passes over the rounded projecting
end of the pin stud A, it is depressed, and contact is established between E and D,
or between the switch arni and E and D, or between the tubular stud B, the
switch arm and E and D, or any of them. In Figures 3 and 4 the pin stud A is
held in position by a spiral spring s within the hollow or tubular stud B, until
depressed by the switch arm or lever F', when contact is established between A
and E, F, A and E or F A B and E or any of them with each other. Figure 5
shows a modification in which the pin stud A is hollow, and kept in place by a
spiral spring s so that when it is depressed by the action of the switch arm or
lever, contact is established between A and E, B, A and E, or the switch arm or
lever with either of them or any of them with each other. In Figure 6 the
pressure of the switch arni upon the pin stud A breaks the electrical contact
between B and E and establishes contact between E and D, or the switch arm
and A, B, F, D, or any of them or with each other. Figure 7 shews a modification
in which the movement of the switch_arm depressing A causes G to break contact
with D and establish contact with E, or the switch arm with G and E, or
A BGE or any of them or with each other. In any of the modifications shown
the pin stud A may be of metal, or any insulating substance or be provided with
an insulating lining.
Dated this 7th day of May 1896.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Electrical Switches.
We, MAX BINSWANGER, Electrician and FRANCIS GEORGE BELL, both of
No. 71 Queen Victoria Street, in the City and County of Londoa 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 :-
Our invention relates to certain improvements in and connected with electrical
switches, and has for its object the opening or closing of a circuit or circuits or the
making or breaking of an electrical contact by moving a switch arm other than
that operated by the mere contact of said arm with the stud or studs. This we
effect. by constructing a hollow or tubular stud in which a telescope or plunger
stud is depressed by the switch arm against the tension or torsion of a spring or
springs.
In order that our invention may be the better understood, we have appended the
accompanying sheet of drawings to our Provisional Specification to which reference
may be had in following the description, in which Figure 1 is a plan and Figure 2
a sectional elevation of one form of stud according to our said invention, and
Figure 3 is a plan view of a modification, showing the switch arm or lever, and
Figure 4 is a sectional elevation thereof. Figures 5, 6, and 7 are sectional
elevations of other modifications.
Similar letters of reference indicate corresponding parts throughout the several
views.
Referring to Figures 1 and 2, the hollow stud B is fitted into the base C of a
switch, and the pin stud A fits freely within the bore, and is retained in position
by the spring D. When the switch arm or lever passes over the rounded projecting
end of the pin stud A, it is depressed, and contact is established between E and D,
or between the switch arm and E and D, or between the tubular stud B, the
switch arm and E and D, or any of them. In Figures 3 and 4 the pin stud A is
held in position by a spiral spring s within the hollow or tubular stud B, until
depressed by the switch arm or lever F, when contact is established between A
and E, F, A and E or F, A, B and E or any of them with each other. Figure 5
shows a modification in which the pin stud A is hollow, and kept in place by a
spiral springs so that when it is depressed by the action of the switch arm or lever,
contact is established between A and E, B, A and E, or the switch arm or lever
with either of them or any of them with each other. In Figure 6 the pressure
of the switch arm upon the pin stud A breaks the electrical contact between B
and E, and establishes contact between E and D, or the switch arin, and
A, B, E, D, or any of them or with each other. Figure 7 shows a modification in
which the movement of the switch arm depressing A causes G to break contact
with D and establish contact with E, or the switch arm with G and E, or
A, B, G, E, or any of them or with each other. In any of the modifications
shown the pin stud A may be of metal, or any insulating substance, or the tubular
stud B may be of metal or any insulating substance, or be provided with an
insulating lining.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
In an electrical switch the construction and employment of a pin stud working
frecly within a fixed tubular stud, and depressed against the tension or torsion of

page_text: a spring, by the action of the switch arm, making or breaking an electrical contact
or contacts by said depression, substantially as herein described and shown by the
appended drawings.
Dated this 6th day of Mon 1906
FREDK. WALKER,
73 St. Stephen's Road, Upton Park, E., Agent for the Applicants..