Improvements in the Construction of Electrical Switches.
Year: 1892

page_text: Date of Application, 13th Oct. 1892
Complete Specification Left. 13th July 1893--Accented 2nd Sept. 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Electrical Switches.
We SAMUEL THOMAS WYAND Builder and LOUIS SCHRAMM, Electrician both
of 15 Lower Grosvenor Place Eaton Square, in the County of Middlesex, do
hereby declare the nature of this invention to be as follows:-
This invention relates to a simple construction of electrical switch.
According to this invention we make the base of switch of any suitable material
and so formed as to be a bearing and guide for a contact sliding shoe, and a
handle also with a channel for a spring and fixing contact lugs.
To the lower portion of the handle we suitably pivot a link the other end of
which is pivotted to the upper portion of a sliding shoe under the said shoe is
placed a suitable spring over which it rides by means of the action of the handle
so as to make and break contact between the contact lugs when the shoe is moved
over its centre of motion.
By this invention a most rapid and effective "make and break" for switches is
obtained.
Dated thin 19th
1000
BROWNE & Co.,
9, Warwick Court, W.C., Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in the Construction of Electrical Switches.
We SAMUEL THOMAS WYAND, Builder and LOUIS SCHRAMM Electrician both
of 15 Lower Grosvenor Place, Eaton Square, in the County of Middlesex, do
hereby declare the nature of this invention and in what manner the same is to
he performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to a simple construction of electrical switch.
According to this invention we make the base of switch of any suitable material
and on to this we mount a contact sliding shoe and a handle and we form a channel
in the base for a spring and fixing contact lugs.
To the lower portion of the handle we suitably pivot a link the other end of
which is pivotted to the upper portion of a sliding shoe under the said shoe is
placed a suitable spring over which it rides by means of the action of the handle
so as to make and break contact between the contact lugs when the shoe is moved
over its centre of motion.
By this invention a most rapid and effective "make and break" for switches is
obtained.
And in order that our said invention may be fully understood we will describe
the same with reference to the accompanying sheet of drawings in which :-
Fig. 1 shews elevation of switch complete.
Fig. 2 top plan of same.
Fig. 3 elevation of switch with cover removed.
Fig. 4 plan of Fig. 3.
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Fig. 5 cross section with cover removed shewing switch "off."
Fig. 6 cross section with cover removed shewing switch ". on.
The same letters denote the same parts in all the views.
:—
a. shews base made preferably in earthenware this is formed with hollow body b.
or this body may be formed separately and of any material or combination of
LD
.

page_text: materials having slots c. c. at back and front, d is a sliding shoe of metal to form
the contact this is fitted so as to slide over the spring e. this spring is placed loosely
in the channel m. f is the handle this we prefer to make of earthenware but it may
be of any other suitable material or even metal but in this latter case it would of
course be insulated from the shoe d. g is a link pivotted at A. to the handle ƒ. and
at to the shoe d. i. i. are the two contact pieces secured to the base by the
screws k. is the cover.
The action of a switch constructed as above is as follows:-Supposing the
switch to be "off" as shewn at Fig. 5. in order to switch "on" the handle fis
pushed or pulled over in the direction of the arrows flight which will pull the
shoe d. forward over the spring e. and cause it to assume the position shewn at
Fig. 6. the shoe sliding and being tipped down between the contact pieces i i so
as to complete the circuit.
The cover screws onto the body b so as to be flush with the base as shewn at
Fig. 1.
Switches may be made any size according to this invention.
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 :-
1. In an electrical switch the sliding shoe d. in combination with handle flink g.
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this 13th day of July 1893.
BROWNE & Co.,
9, Warwick Court, Gray's Inn, W.C., Agents for Applicants.