Year: 1896

page_text: I, GUSTAV BINSWANGER of 71 Queen Victoria Street in the City and County of
London, Electrical Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to certain improvements in electrical switches, more
particularly applicable to that type of switch now commonly known as the "link
switch," and described and claimed in the Specification of Letters Patent granted to
me, No. 3664 of 1891.
In this instance, in carrying my invention into effect, I employ two pivotted switch
bars with rubbing contacts, constructed upon the principle of, and according to the
prior specification already quoted. The two switch bars are connected so as to form
a bi-polar branch switch, and are operated by one handle or lever, so that contact is
established or broken by both bars with the same movement.
The essential feature of my present invention is in the connection of the two
switch bars by a transverse coupling bar of vulcanized fibre, indurated wood or any
insulating material or substance. The handle or lever is pivotted upon a suitable
support centrally, or approximately so, between the switch bars to which said trans-
verse insulating bar is rigidly fixed, the link connecting the handle or lever thereto
in the usual manner.
A high degree of insulation is obtained in the bi-polar switch according to my
invention by the adaptation of the transverse insulating bar, and also by the general
construction of said switch, in which the contacts are set widely apart, and a base of
china, stoneware, or like insulating material or substance is employed to prevent
leakage or accidental short-circuiting under any circumstances.
The bi-polar switch may be of any suitable shape, and the parts thereof as herein
described may be arranged to conform thereto, without departing from my said
invention.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicant.
I, GUSTAV BINSWANGER of 71 Queen Victoria Street, in the City and County of
London, Electrical Engineer 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 :-
My invention relates to certain improvements in electrical switches, more particu-
larly applicable to that type of switch now commonly known as the "link switch,"

page_text: and described and claimed in the Specification of Letters Patent granted to me,
No. 3664 of A.D. 1891.
In order that my invention may be the better understood, I have appended the
accompanying sheet of drawings, in which
Figure 1 is a plan view of the device, shown in the position of contact, and Figure 2
is a front elevation thereof. Figure 3 is an end elevation, showing the position when
contact is broken, and
Figure 4 is a plan view of the switch bars shown detached.
Similar letters of reference indicate corresponding parts throughout the several
views.
In carrying my invention into effect I employ two pivotted. switch bars A A¹
Figures 1, 2, 3 and 4, with rubbing contacts a a¹, constructed upon the principle of
and according to, the prior specification already quoted. The two switch bars A A'
are connected so as to form a bipolar switch for a branch circuit, and are operated by
one handle or lever H, so that contact is established or broken by both bars A A¹
between the contacts a a¹ by the same action or movement. Said bars A A' are
connected by a transverse coupling bar B, of vulcanized fibre, indurated wood, or any
insulating material or substance. The handle or lever H is pivotted upon a suitable
support, or bracket C centrally or approximately so, between the switch bars A A¹ to
which the transverse coupling bar B is rigidly fixed, the link L connecting the handle
or lever H thereto by a pivot in the slots formed in the extension b especially shown
by Figure 4. Any equivalent method of, or means for attaching said link may be
employed.
A high degree of insulation is obtained in the bipolar switch according to my
invention by the adaptation of the transverse insulating bar B, and also by the general
construction, in which the contacts a a¹ are set widely apart and a base D of china,
stoneware or like insulating material or substance is employed to prevent leakage or
accidental short-circuiting under any circumstances.
The bipolar switch may be of any suitable shape or conformation, and the several
parts arranged to conform thereto without departing from my said invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
First. The construction and insulation of a bipolar link switch as described and
shown by the drawings.
Second. In a bipolar switch the employment of two switch bars connected by an
insulating transverse bar in combination with a lever or handle and link substantially
as herein described and shown by the appended drawings.
Dated this 3rd day of March 1897
FREDK. WALKER,
73 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicant.
FREDK. WALKER,
73 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicant.