Improvements in or relating to Electric Tumbler Switch Appliances and their Base Plates.
Year: 1898

page_text: Date of Application, 12th Aug., 1898
Complete Specification Left, 4th Oct., 1898-Accepted, 19th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Electric Tumbler Switch Appliances
and their Base Plates.
I, CHARLES MARKT, of the Firm of Markt Bros. & Co., of 38 and 39, Beech
Street, Barbican, City of London, Merchant, do hereby declare the nature of this
invention to be as follows:-
This invention has for object, certain improvements in or relating to electric
tumbler switch appliances and their base plates to render them more efficient in
their action with regard to the appliances and with a permanent stop when on
or off, the base being of pottery or compressed insulating compounds with raised
cheeks for the support and attachment of brackets above the level of the surface
and with a partitioned aperture for the separate affixture of the lips of the screw
sockets or contacts betweeen which the conductor lugs of the tumbler can find a
lodgment, said lugs being formed from bent down ends of a plate secured at the
front of a rearwardly pivotted insulated tumbler and of a plate with stops, on
which plate a roller of the throw over lever has a bearing. The throw over lever
is of curved form from the ball socket downwardly and when moved into either
the on or off positions it fixes itself against the stops.
The base is very thin compared to those at present in use and by reason of the
raised cheeks plenty of room is formed for the tumbler to work in there being a
spring in the base to retain the tumbler in either position.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Charles Markt.
Improvements in or relating to Electric Tumbler Switch Appliances
and their Base Plates.
I, CHARLES MARKT, of the Firm of Markt Bros. & Co., of 38 and 39, Beech
Street, Barbican, City of London, Merchant, 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:-
This invention has for object, certain improvements in or relating to electric
tumbler switch appliances and their base plates to render them more efficient in
their action with regard to the appliances and with a permanent stop when on
077

page_text: or off, the base being of pottery or compressed insulating compounds with raised
cheeks for the support and attachment of brackets above the level of the surface
and with a partitioned aperture for the separate affixture of the lips of the screw
sockets or contacts betweeen which the conductor lugs of the tumbler can find a
lodgment, said lugs being formed from bent down ends of a plate secured at the 5
front of a rearwardly pivotted insulated tumbler and of a plate with stops, on
which plate a roller of the throw over lever has a bearing. The throw over lever
is of curved form from the ball socket downwardly and when moved into either
the on or off positions it fixes itself against the stops.
The base is very thin compared to those at present in use and by reason of the 1
raised cheeks plenty of room is formed for the tumbler to work in, there being a
spring in the base to retain the tumbler in either position.
.
My invention is clearly represented on the annexed drawings.
Figure 1 sectional elevation of base on line x, x, of Figure 2 which is a plan
of same.
Figure 3 sectional elevation of base on line y, y, of Figure 2.
Figures 4 and 5 side and front elevation respectively of bracket of saddle forma-
tion.
Figures 6 and 7 side and front elevation of tumbler lever.
Figures 8 and 9 plans and side elevation of the switch appliances with the top 2
plate and lever stops in position.
Figures 10 and 11 plan and under side views of the switch appliances with the
contact lips.
Figures 12 and 13 plan and side. elevation of one of the contact lugs.
Figure 14 side elevation partly in section of the complete apparatus with the
tumbler switch "off."
Figure 15 similar elevation and part section of the apparatus with the switch
on.
35
Figure 16 plan of apparatus complete with switch
Figure 17 perspective elevation of base.
on."
The base A of pottery or compressed insulating compound is moulded or pro-
vided with two raised cheeks B, B, in which screw holes C, C, are formed.
D, D, are two pockets with a partition E. F, F, are holes by which the base
can be secured by screws to a backing of any kind. G, G, holes for the passage
of the conduct or circuit wires.
H, H, holes for screw pins to fix the coupling plates I, I.
J, hole slightly rearwardly arranged for the reception of a coiled or helical
spring K by which the tumbler L is held firmly in an
"
on or off" position.
"
M, bracket or saddle consisting of two sides, two bottom spread out flaaiges N, N,
and a top central hollow post P screw threaded on the outside for a cover or cap 4
not shown.
Q, a hole through the wall of the hollow top P for the pivot pin of the tumbler
lever R.
S, hole in each wall M of the bracket or saddle for the pivot pin of the tumbler
switch L, the upper face of which has a bearing plate T for the roller U rotatable 4
in the curved leg R¹ to ride on, said plate being adjustable as to height by a
slotted wedge V, which when the stops (screws) W, W, are loosened can be pushed
along on the tumbler L, and the stops (screws) tightened up to fix it as desired.
The tumbler L and the wedge V are of insulated material and the tumbler has
at each of its two sides a plate X of conductive metal with inwardly projecting
and turned down lips Y, Y, which when the tumbler L is down and
the pockets D, D, one on either side of the partition E with a slight springy action
go into
against the partition E and are thereby pressed outwardly against the lugs Y of
the contact plates I,'I, to which the terminals of the circuit wires are affixed by
the screws (t.
66
on
"
The spiral or helical spring K has one end entered into a hole or recess in
the lower face of the tumbler switch L and rests within the hole of the base A,
5

page_text: the bearing being behind the vertical centre of the base ensures the action of the
tumbler switch and its retention in an <
off" position at which it may
be placed by the lever R.
on or
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. An electrical tumbler switch base, such as A, with raised cheeks, such as B,
rearwardly of the centre, substantially as represented, and on which cheeks B, B,
the saddle shape of bracket M is fixed for the purpose described.
2. Pivotting an electrical tumbler switch L rearwardly of the saddle shaped
bracket M in combination with a curved leg R¹ of the tumbler lever R, sub-
stantially as indicated as and for the purpose set forth.
3. Providing an electrical switch tumbler L with a wedge V between said
tumbler L and a top plate T for adjustment purposes, as described.
4. Providing an electrical tumbler switch base with a partition E, and forming
two pockets D, D, in said base for the reception of bent down or depending
lips Y, Y, of contact plates X, X, and I, I, respectively, as and for the purpose
explained.
5. Assembling the several foregoing features of novelty and constituting an
electrical tumbler switch in their combination, as represented at Figures 14, 15,
and 16 of the annexed drawings.
VILIS
DIG
veloper 1000.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for C. Markt.