Improvements in Electrical Switches.
Year: 1891

page_text: Date of Application, 8th Oct., 1891
Complete Specification Left, 8th July, 1892-Accepted. 27th Aug.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Electrical Switches.
WILLIAM CHARLES CHEESEWRIGHT, of 96 Wardour Street London in the
County of Middlesex, Decorator, do hereby declare the nature of this invention to
be as follows:-
My invention relates to the improved construction of switch used for connecting
electric currents in a more compact form than any switch hitherto in use, and is
shown on the accompanying drawing, on reference to which it will be seen that the
switch can be fitted to any wall flush with its face the only projection being the
handle "A," therefore what I claim for my invention is that it can be adapted any-
where without disfiguring decorations whatsoever.
TULLA HADLED CHEER.
COMPLETE SPECIFICATION.
Improvements in Electrical Switches.
I WILLIAM CHARLES CHEESEWRIGHT of 96 Wardour Street, Soho in the
County of Middlesex, Decorator do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention consists of an improved electrical switch for domestic purposes,
constructed in such manner that when affixed to a wall it shall not project beyond.
the surface but shall be flush therewith.
I secure these results in the following manner. The body or case of the switch
is a square or other shaped shallow box formed of vulcanite porcelain or other
material that will secure perfect insulation see H Figs. 1 & 2. Attached to the
bottom of this box and inside thereof is the mechanism of the switch. The box is
provided with a lid see B Fig. 2 of desired form which may be constructed of metal
or other suitable material. The said lid being provided at its centre with a rocking
lever "A" Fig. 2 the external portion of which may be of various forms to suit
special conditions Figs. 4, 5, 6 & 7 such as, partly flush Fig. 5 or countersunk
Fig. 7. The lever at its internal extremity is of such form that it shall engage in
a notch cut in the bolt E Figs. 1 & 2 insulated with vulcanite "N" Fig. 2. The
rocking lever "A" is also provided at "D" Fig. 2 with a projecting pin which
engages and depresses the spring "C" Fig. 2. The spring "C" being attached to
the lid "B" Fig. 2. The action of such spring by its resistance being to partially
lock the lever "A" Fig. 2 when said lever is at the full extremity at either end of
the stroke. The lid "B" Fig. 2 is secured to the body or box by means of the
screws "M" Figs. 1 & 3. The body of the box is provided round its upper surface
with a rebate which carries a water-tight packing ring "O" Fig. 2, such ring being
compressed and so forming a joint when the lid "B" Fig. 2 is screwed on. The
switch proper consists of the following parts. "E" Figs. 1 & 2 is the switch bolt

page_text: .carried by the double bracket "F" Figs. 1 & 2 (said bolt being provided with an
insulated notch "N" Fig. 2 and secured to the body of the switch. This bolt has
an end on movement transmitted to it by means of the rocking lever above described.
"L" "L" Fig. 1 are two brackets to which are made fast the electric cables
between which it is desired to make or break contact. The brackets "L" "L"
Fig. also carry the spring contact makera "G" "G" Fig. 1 between the rubbing
surfaces of which the switch bolt "E" makes or breaks the contact. The whole
switch is attached to whatever surface it may be desired to affix it, by means of the
screws "I" Fig. 1.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
That my switch is more compact and of shallower depth than switches hitherto
manufactured. That its whole depth being not more than the plaster depth of any
wall it can consequently lie flush with such wall and so avoid disfigurement. Also
that it is so secure in its action due to the locking of the lever "A" Fig. 2 that it
cannot by any but wilful means fail in its purpose.
Dated July 8th 1892.