Improvements in Switches for Controlling Electric Currents for Lamps and other purposes.
Year: 1890

page_text: Date of Application, 30th Apr., 1890
Complete Specification Left, 29th Jan., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Switches for Controlling Electric Currents for
Lamps and other purposes.
JOSEPH WARDEN and GEORGE SMITH, of the firm of R. Ciardner & Co.,
66. Granville Street, Birmingham, Manufacturers, do hereby declare the nature of
this invention to be as follows:-
An insulating block of any non conducting material, enclosed in a case of metal
or other inaterial, and the shape of which may vary. The block is held in position
in the case either by screws, slots or dovetails. Attached to the block are the
two electrodes which may be metal bands, wires or screws and means are provided
for attaching wires to the electrodes. A metallic spring or bridge is attached to
one of the electrodes leaving one end free to move to and from the other electrode
on pressure being applied or taken off and the current between the electrodes made
or broken thereby. The normal condition of the spring is to he out of contact. A
cam, lever or other device is employed to give the pressure to the spring to make
the contact. This cam, lever or other device is inserted in the end of a metal
plug, attached to but rotating independently of the case and which plug, is
moved by a thumb piece, knob, lever or key as in the case of an ordinary gas tap.
We claim as the essential features of our invention the direct acting spring or
bridge, controlled by cam, lever or other device the pressure from which is exerted
on the spring or bridge by the one motion of rotation only, & in the absence of
complicated parts or coiled springs whereby accessibility and perfect contact are
secured.
Dated this 20+1 2ow at 1900
JOSEPH WARDEN.
GEO. SMITH.
COMPLETE SPECIFICATION.
Improvements in Switches for Controlling Electric Currents for
Lamps and other purposes.
JOSEPH WARDEN and GEORGE SMITH, of the firm of R. Gardner & Co.,
66. Granville Street, Birmingham, Manufacturers, 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 :-
An insulating block marked A in drawings, of any non conducting material,
curlosed in a case marked B in drawings of metal or other material, and the shape
of which may vary. The block is held in position in the case either by screws,
slots or dovetails. Attached to the block are the two electrodes marked "C. ("¹ in
drawings which may be metal bands, wire or screws and means are provided for
attaching wires to the electrodes. A metallic spring or bridge marked D on
drawings is attached to one of the electrodes leaving one end free to move to
and from the other electrode on pressure being applied or taken off and the current
between the electrodes made or broken thereby. The normal condition of the
spring is to be out of contact. A cam, lever or other device marked E on drawings
is employed to give the pressure to the spring, to make the contact. This cam,
lever or other device is inserted in the end of a metal plug marked F in the
drawings attached to, but rotating independently of the case, and which plug is
moved by a thumb piece, knob, lever, or key as in the case of an ordinary gas tap
as shown at G in drawings.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A direct acting spring or bridge to make or break the contact between the
electrodes.
2. Control of the spring or bridge by the cam, lever or other device without the
aid of coiled springs.
3. The contact is made or broken by the one motion of rotation only, applied to
the plug as in an ordinary gas tap.
Dated this 28th day of January 1891.
JOSEPH WARDEN.
GEORGE SMITH.