AN IMPROVED METHOD OF OPERATING ELECTRICAL SWITCHES TO ENSURE POSITIVE MAKE AND BREAK ACTION OF SAME to be as follows:-
Year: 1884

page_text: We HENRY BLECKLY BOURNE Electrician, and HENRY RICHARD FOX BOURNE,
Gentleman both of 8 Queen Anne's Grove, Bedford Park London do hereby declare
the nature of our said invention for "AN IMPROVED METHOD OF OPERATING
ELECTRICAL SWITCHES TO ENSURE POSITIVE MAKE AND BREAK ACTION OF SAME
to be as follows:-
"
For the purpose of our invention we provide the bridge or movable contact piece
with one or more studs or pins which when the bridge is moved causes the stud or
pin to press against and put tension on a spring attached to the bridge so that
after the bridge has passed a certain point the spring escapes an abutting pin and
causes, the bridge to fly rapidly off and out of contact to break circuit other pins
being arranged that another movement of the bridge causes the spring to be put
into tension so that it can make circuit.
The spring may be flat, spiral or of other shape and the contact piece after being
moved in a circular direction for a given distance can escape under the tension of
the spring or be put into contact.
By this arrangement supposing the bridge or contact piece to have been moved it
is impossible for it to return or be moved back to make imperfect contact.
H. GARDNER,
166, Fleet Street, London,
Agent for the Applicants.

page_text: We HENRY BLECKLY BOURNE Electrician and HENRY RICHARD Fox BOURNE,
Gentleman both of 8 Queen Annes Grove, Bedford Park, London do hereby declare
the nature of our said invention for "AN IMPROVED METHOD OF OPERATING
ELECTRICAL SWITCHES TO ENSURE POSITIVE MAKE AND BREAK ACTION OF SAME
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
""
The object of our invention is to arrange appliances in connection with electrical
switches so as to prevent the switch being left partly on and partly off.
For the purpose of our invention which will be understood by reference to the
accompanying drawings in which Figure 1 represents in plan a switch constructed
according to our invention we provide the bridge or movable contact piece A. with
one or more studs or pins B, B, which when the bridge is moved presses against
and puts tension on a spring C attached to the said bridge so that after the
bridge has passed a certain point the spring Cescapes an abutting pin D and causes
the bridge to fly rapidly off and out-of-contact_to_break_circuit other-pins-being-
arranged that another movement of the bridge causes the spring to be put into
ténsion so that it can make circuit.
The spring may be flat, spiral or other shape and the contact piece after being
moved in a circular direction for a given distance can escape under the tension of
the spring or be put into contact.
By this arrangement supposing the bridge or contact piece to have been moved
it is impossible for it to return or be moved back to make imperfect contact.
Figure 2 shows another arrangement of switch in which the bridge A can be
moved off the contact in either direction. The bridge A has a slot E as seen at
Figure 3 through which the pin F passes. Fixed to the said pin F is a block G
for carrying the spring C, said block G having a pin or stud H depending or pro-
jecting therefrom into a hole I in the bridge A. D, D, are rollers or studs at each
side of the contact piece J for preventing the bridge A when off the said contact
piece J from returning thereto accidentally.
Figure 4 is a section of a switch arranged as at Figure 2.
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
First The construction of an electric switch wherein the movable contact piece
is not directly under the control of the person_ using such switch, but is actuated

page_text: by a spring or equivalent device connected with the handle substantially as
described.
Secondly The improved electrical switches constructed as described and sub-
stantially as shown in the annexed drawings to ensure positive make.and break of
the circuit.