Improved Electric Tumbler Switch.
Year: 1899

page_text: Improved Electric Tumbler Switch.
We, HEINRICH JULIUS FERDINAND VOIGT and JACOB ADOLF HAEFFNER, of the
Electrotechnical Works, Bockenheim, near Frankfort on Maine, Germany,
Electrical Engineers, do hereby declare the nature of this invention to be as
follows:-
The present invention relates to an electric so-called tumbler-switch, the handle
the
of which is formed as a double-armed lever and is movable on
same axis together with the bars bearing the contact piece. The inner prolonga-
tion of the handle is connected with the bars close to the contact piece by means
of a slotted plate, and a spring coiled round the plate strives to keep the rails
and consequently the contact piece continually pressed away from the said
prolongation. If the handle is reversed, the spring alone is first compressed
whilst the contact piece, however, remains stationary. As soon as the prolonga-
tion is moved over the dead point, however, the spring pulls the contact piece
out of its former position and forces it into the opposite one.
The new switch has been illustrated in the accompanying drawing partly in
section and partly in elevation and respectively in and out of action in Figures 1
and 2.
Figure 3 is the side view of Figure 2.
Figure 4 is the ground plan of Figure 2.
On the base a made of porcelain or the like, which contains the holes for the
fixing and contact screws and so forth, the bracket bis fastened. The upper
tubular part thereof is placed over the middle of the base and is screw threaded
on the outside for receiving the cover c.
In this tubular part is inserted the pin d which forms both the axle for the
handle e and for the bars f. The latter are formed of a U-shaped strip of sheet
iron to whose lower end the insulated bridge piece g is fastened.
The bars are joined to each other close to the bridge piece by a pin h and
upon this the link i can rotate, the other slotted end of which contains the pin /
inserted in the inner extension of the handle e. A spring m surrounds the
link and strives to separate the pins and h.
If the switch is placed in the operative position (Figure 1) the bridge piece
is between the two spring contacts n and o, whereas in the other position (Figure 2)
it rests against a projection or the like.
When the circuit is to be broken, the handle e is turned in direction of the
arrow I during which the bridge piece g remains stationary. The pin / approaches
the pin h, and consequently the spring m is compressed. As soon, however, as
the extension passes the axis of the bars f the spring removes the bridge piece
suddenly from between the spring contacts, and throws it into the opposite
position.
The like movement takes place in making the circuit, (see arrow II).

page_text: Improved Electric Tumbler Switch.
We, HEINRICH JULIUS FERDINAND VOIGT and JACOB ADOLF HAEFFNER, of the
Electrotechnical Works, Bockenheim, near Frankfort on Maine, Germany,
Electrical Engineers, 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:----
The present invention relates to an electric so-called tumbler-switch; the handle
of which is formed as a double-armed lever and is..movable on the
same axis together with the bars bearing the contact piece. The inner prolonga-
tion of the handle is connected with the bars close to the contact piece by means
of a slotted plate, and a spring coiled round the plate strives to keep the rails
and consequently the contact piece continually pressed away from the said
prolongation. If the handle is reversed, the spring alone is first compressed
whilst the contact piece, however, remains stationary. As soon as the prolonga-
tion is moved over the dead point, however, the spring pulls the contact piece
out of its former position and forces it into the opposite one.
The new switch has been illustrated in the drawing filed with the Provisional
Specification partly in section and partly in elevation and respectively in and out
of action in Figures 1 and 2.
Figure 3 is the side view of Figure 2.
Figure 4 is the ground plan of Figure 2.
On the base a made of porcelain or the like, which contains the holes for the
fixing and contact screws and so forth, the bracket bis fastened. The upper
tubular part thereof is placed over the middle of the base and is screw-threaded
on the outside for receiving the cover c.
In this tubular part is inserted the pin d which forms both the axle for the
handle e and for the bars f. The latter are formed of a U-shaped strip of sheet
iron to whose lower end the insulated bridge piece 9 is fastened.
g
The bars are joined to each other close to the bridge piece by a pin h and
upon this the link i can rotate, the other slotted end of which contains the pin
inserted in the inner extension k of the handle e. A spring m surrounds the
link and strives to separate the pins and h.
If the switch is placed in the operative position (Figure 1) the bridge piece g
is between the two spring contacts n and o, whereas in the other position (Figure 2)
it rests against a projection or the like.
When the circuit is to be broken, the handle & is turned in direction of the
arrow I during which the bridge piece g remains stationary. The pin / approaches
the pin h, and consequently the spring m is compressed. As soon, however, as
the extension passes the axis of the bars f the spring removes the bridge piece
suddenly from between the spring contacts and throws it into the opposite
position.
The like movement takes place in making the circuit, (see arrow II).
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
1. An electric switch having a handle e formed as a two armed lever rotating
upon the same axis with the bars f bearing the movable bridge piece g the inner
prolongation of said handle being connected on the other side close to the
contact piece g with the link i revolubly connected with the rails f and in which a

page_text: spring m continually strives to press the bars f and consequently also the bridge
piece g away from the extension h substantially as described.
2. The improved electric switch constructed and operating substantially as
described with reference to the drawings.
Dated the 9th day of February 1900.
W. P. THOMPSON & Co.,
Of London, Liverpool, Manchester and Birmingham.