Year: 1899

page_text: Date of Application, 8th Nov., 1899
Complete Specification Left, 18th June, 1900-Accepted, 28th July,
1900
We, EVERED AND COMPY. LIMITED, of Barnet Works, Birmingham, in the
County of Warwick, Manufacturers, and STANLEY EVERED, Manager at Barnet
Works, aforesaid, do hereby declare the nature of this invention to be as
follows:-
-
The said invention relates to electrical switches of the kind commonly called
two way switches which switches are generally employed to control two electrical.
circuits one of the said circuits being cut off and the other simultaneously switched
on when the switch is operated.
In constructing a switch according to the said invention we arrange on an
insulating base three terminals at nearly equi-distant points the terminal of the
main electrical conductor being situated midway between the two terminals of
the electrical circuits.
We employ a contact bar working in a plane parallel to the base the said
contact bar being of a shape somewhat resembling the letters V or U. The
said V or U shaped contact bar is pivoted to the base at the junction of its two
arms or branches and when in one extreme position connects the terminal of
one lamp conductor with the terminal of the main electrical conductor and when
in its other extreme position connects the terminal of the other lamp conductor
with the terminal of the main conductor. The angular motion of the V or
Ushaped contact bar is effected by a tumbler lever pivoted to a bracket or half
bridge the lower or acting end of the said tumbler lever carrying a loosely
fitting insulating sleeve the end of which is situated between and engages the
two arms or branches of the contact bar. A spring between the bracket or half
bridge and a shoulder on the insulating sleeve effects the quick make and break
contact. The end of the insulating sleeve which engages the arms or branches
of the Vor U shaped contact bar works in a cross slot in the insulating base
of the switch.

page_text: the position which it occupies when connecting the other branch terminal o to
the main terminal b. A spring on the stem of the tumbler lever effects the
quick break and make contact on the operation of the switch. The switch is
covered by a dome 1 (see Figure 3) as is usual.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
First: The construction and arrangement or combination of parts herein-
before described and illustrated in the accompanying drawing constituting a two-
way electrical switch, the said construction and arrangement of parts consisting
essentially of a V or U shaped contact bar pivotted at its middle to the base of
the switch and working in conjunction with three electrical terminals; a tumbler
lever with insulated end engaging between and actuating, the two arms or branches
of the contact bar, a spring on the stem, of the insulated tumbler lever effecting
the quick break and make contact, the several parts being constructed and arranged
substantially as hereinbefore described and illustrated.
Secondly-In a two way electrical switch, the employment of a contact bar
having a shape somewhat resembling the letter V or U the said contact bar having
an angular motion in a plane parallel to the base of the switch substantially as
and for the purpose hereinbefore described and illustrated in the accompanying
drawing.
Dated in inhinh - at T1000