Improvements relating to Switches for Electrical Purposes.
Year: 1887

page_text: Date of Application, 5th Apr., 1887
Complete Left, 4th Jan., 1888
Complete Accepted, 10th Feb., 1888
PROVISIONAL SPECIFICATION.
Improvements relating to Switches for Electrical Purposes.
I, BELA EGGER, of Kleine, Neugasse 23, Vienna, Austria, Manufacturer of.
telegraphic appliances do hereby declare the nature of this invention to be as
follows:-
This invention relates to improved switches, which are advantageous for use in
combination with electric conductors and incandescent-lamp holders.
The said invention comprises a novel arrangement of joint levers with springs
for the purpose of rapidly making and breaking contact, in such a manner that
to an optionally slow or rapid movement of the hand lever or slide corresponds to
a greatly accelerated movement of the contact lever.
The improved switch comprises a hand lever and a contact lever which are placed
together upon an axis, so that they may be turned with facility and, which when
the circuit is interrupted, are pressed against stop pins in a determined angular
position by a spring already a little under tension. On turning the hand lever in
one direction it will pass into a position in line with the said contact lever which
continues to hear against the stop pin, and the said spring is under the greatest
tension in this straight position ready for the succeeding operation.
When this dead point, as it were, is exceeded by the further movement of the lever
and the angle between the two levers has become less than 180 degrees the spring
contracts and moves the contact lever away from the stop pin to another pin having a
contact spring attached thereto, the circuit is thus closed. The same operations tako
place during the return movement for the purpose of breaking or interrupting the
circuit.
As will be seen the exact and sudden making and breaking of the contact takes
place whether the movement of the hand lever, or in lieu thereof a slide, is either slow
or rapid, in contradistinction to the systems in which a jerking motion attained in one
direction over an inclined and descending surface is caused by spring power without
however attaining a distance of the contact surfaces that is proportional to the initial
velocity.

page_text: I sometimes make a large switch, according to my invention, in which a rod that
can slide to and fro acts upon a lever by means of an arın slotted laterally and imparts
to it the required motion. In other respects the construction is similar to that above
described.
The peculiar mode of operation, causing the most exact breaking of the circuit,
admits of a diversity of forms without prejudice to solidity.
DL:
L 1
A
+1 1007
HASELTINE, LAKE & Co..
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to Switches for Electrical Purposes.
I BELA EGGER of Kleine Neugasse 23 Vienna, Austria, Manufacturer of
telegraphic appliances, 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 und by the following statement:-
-
This invention relates to improved switches which are advantageous for use in
combination with electric conductors and incandescent-lamp holders.
The said invention comprises a novel arrangement of joint levers with springs for
the purpose of rapidly making and breaking contact, in such a manner that an
optionally slow or rapid movement of the hand lever or slide corresponds to a
greatly accelerated movement of the contact lever, which it is decidedly desirable to
attain.
The mode of operation of the improved switch is shown by way of example in the
accompanying drawings the figures of which are hereinafter referred to.
The improved switch comprises a hand lever A and a contact lever B which are
placed together upon an axis C so that they may be turned with facility and, which
when the circuit is interrupted are pressed against stop pins D and E, Figure!1,ința
determined angular position by a spring already a little under tension. On turning
the hand lever A in the direction ef the arrow Figure 1, it will pass into aiposition
shown in Figure 2, whilst the contact lever B continues to bear against the stop pin D
and the said spring is under the greatest tension in this straight position ready for
the succeeding operation. When this dead point, as it were, is exceeded by-the
further movement of the lever A, as represented in Figure 3, the angle between the
two levers has become less than 180 degroes the spring contracts and moves
the contact lever B in the direction of the arrows Figure 3, from the stop pin D to the
pin F having a contact spring attached thereto, the circuit is thus closed. In this
position as shown in Figure 4 the spring presses the lever B against the conductor
contact F, whilst the lover B is connected through the axis C with the second cor-
responding conductor part. The same operations take place during the return
movement for the purpose of breaking or interrupting the circuit.
As will be seen the exact and sudden making and breaking of the contact takes
place whether the movement of the hand lever, or in lieu thereof a slide, is either
slow or rapid, in contradistinction to the systems in which a jerking motion attained
in one direction over an inclined and descending surface is caused by spring power
without however attaining a distance of the contact surfaces that is proportional to
the initial velocity.
Figures 5, 6 and 7 illustrate a small switch constructed according to the above
described diagram, namely in the position shown in figure 4.
Figures 8 and 9 show a larger switch constructed according to this invention, in
which a rod that can slide to and fro-acts upon the lever A by means of an arm

page_text: slotted laterally, and imparts to it the required motion.
construction is similar to that above described.
In other respects the
Figures 10, 11, 12 and 13 show the arrangement of the hand lever construction
in an incandescent-lamp holder. Figure 12, is a plan and Figure 10 an elevation
of the two levers with the spring in the position shown in Figure 2 of the diagrams.
The peculiar mode of operation, causing the most exact breaking of the circuit,
admits of a diversity of forms without prejudice to solidity.
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 :-
In switches for electric conductors in general, and for combined incandescent-
lamp holders in particular, the employment of joint levers in combination with
springs in such a manner that to an optionally slow or quick-movement of a hand
lever, slide, or any other secondary mechanical part taking this place, corresponds
an extremely rapid movement of the contact lever proper, for the purpose of rapidly
making and breaking contact, and the movements in both directions
accompanied by similar mechanical actions substantially as described and represented
in the drawings.
are
1000