Improvements in Electric Switches.
Year: 1889

page_text: Date of Application, 21st Oct., 1889
Complete Specification Left, 23rd June, 1890-Accepted, 26th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Electric Switches.
We, THOMAS MARCHER, Engineer of Neumarkt near Nuremburg in the Kingdom
of Bavaria, German Empire, and FERDINAND ERNECKE, Manufacturer of 112, König-
grätzer Strasse, Berlin, German Empire, do hereby declare the nature of this invention
to be as follows:-
Our invention relates to some new and useful improvements in circuit closers, of
which the following is an exact description.
In order to make our invention more clear, we refer to the accompanying
drawings, in which similar letters denote similar parts throughout the several
views.
Fig. 1 is a vertical section of our contact closer.
Fig. 2 is a side elevation with the cover m in section.
Fig. 3 is a sectional plan.
Figs. 4, 5, 6 and 7 are elevations showing the various positions of the closer.
The object of our invention is to prevent any possibility of a middle position of a
circuit closer. Closers made on our principle are forced always to be in one extreme
position or the other. Further although this effect results from the working of a
spring, the handle for operating the circuit closer is not affected, that is to say, forced
to turn round, under the influence of the spring. The operator may therefore turn the
handle to connect or disconnect the current, either slowly or quickly, but the con-
nection or interruption only takes place at a given point in each turn of the handle
and is consequently sudden, thus preventing any effusion of sparks.
To the vulcanite sole plate k is screwed the bridge e, in which the tumbler i is
pivoted on pin f
The spindle c is turned down and is screwed into the hole in the top of the bridge
up to its shoulder.
Spindle c has a collar in the middle. On spindle c slides the cylinder 6 for
operating the tumbler. The lower end of cylinder bis cut off in form of a screw
thread as may be clearly seen in fig. 7 of the drawings. Two points in the circum-
ference of the lower end of cylinder b rest on the tumbler i.
The upper end y of the cylinder is formed to a four-sided nut, and bored out to
slide over the collar of spindle c. Underneath the collar of spindle c and encircling
the spindle is a spiral spring r, this spring presses on a plate o screwed on to the
upper inside end of the cylinder and has the tendency to press the cylinder down on
to the tumbler. a is the key for operating the circuit closer and fits over the four-
sided nut y, being fixed to spindle e by means of a washer d and split pin n.
To one end of the tumbler is attached by means of a screw, insulated by a push p of
some non-conducting material, the contact piece h. On falling, contact piece h
completes the circuit by connecting the two poles g g'. The pieces g and g' are
screwed on to the sole plate k.
The conducting wires may be secured in any suitable manner to the contact pieces g
and g'; m is a protecting cover for the circuit closer.
The operation of the closer takes place in the following manner:
The current is connected as in fig. 4; by turning the key, the tumbler will remain
in the same position, the cylinder only rising and compressing the spring 0. As soon
as the vertical surface in the end of the cylinder has passed the end of the tumbler,
the spring presses the cylinder down on the other end of tumbler and consequently
the current is disconnected, as in fig. 6; on turning the key further round as in

page_text: fig. 7, the tumbler snaps back and connects the current, as soon as the cylinder has
reached the position in fig. 4.
DL1000
COMPLETE SPECIFICATION.
Improvements in Electric Switches.
We, THOMAS MARCHER, of Neumarkt near Nuremburg in the Kingdom of Bavaria,
Germany, Engineer, and FERDINAND ERNECKE, of 112 Königgrätzer Strasse, Berlin,
Germany, Manufacturer, 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:-
Our invention relates to some new and useful improvements in circuit closers, of
which the following is an exact description.
In order to make our invention more clear, we refer to the drawings sent in with
provisional specification, in which
Fig. 1 is a vertical section of our contact closer.
Fig. 2 is a side elevation with the cover m in section.
Fig. 3 is a sectional plan.
Figs. 4 to 7 are elevations showing the various positions of the closer.
The object of our invention is to prevent any possibility of middle position of a
circuit closer. Closers made on our principle are forced always to be in one extreme
position or the other. Further, that although this effect results from the working of
a spring, the handle for operating the circuit closer is not affected, that is to say,
forced to turn round under the influence of the spring. The operator may therefore
turn the handle to connect or disconnect the current, either slowly or quickly but the
connection or interruption only takes place at a given point in each turn of the handle
and is consequently sudden thus preventing any effusion of sparks.
To the vulcanite base plate & is screwed the bridge e in which the tumbler ? is
pivoted on pin f
The spindle c is turned down and screwed into the hole in the top of the bridge up
to its shoulder. Spindle has a collar in the middle; on spindle c slides the
cylinder for operating the tumbler. The lower end of cylinder bis cut off in form
of a screw thread, as may be clearly seen in Fig. 7 of the drawing. Two points in
the circumference of the lower end of cylinder & rest on the tumbler i. The upper
end y of the cylinder is formed to a four-sided nut, and bored out to slide over the
collar of spindle c. Underneath the collar of spindle c and encircling the spindle is a
spiral spring r, this spring presses on a plate o screwed on to the upper inside end of
a is
the cylinder and has the tendency to press the cylinder down on to the tumbler.
the key for operating the circuit closer and fits over the four-sided nut y, being fixed
to spindle c by means of a washer d and split pin n.
P
To one end of the tumbler is attached by means of a screw, insulated by a bush
of some non-conducting material the contact piece h. On falling contact piece h
completes the circuit by connecting the two poles 9 g¹. The conducting wires may
be secured in any suitable manner to the contact pieces g and g¹; m is a protecting
cover for the circuit closer.
The operation of the closer takes place in the following manner:
The circuit is shown connected in Fig. 4, by turning the key the tumbler will
remain in the same position, the cylinder only rising and compressing the spring o.
As soon as the vertical surface in the end of the cylinder has passed the end of the
tumbler, the spring presses the cylinder down on the other end of tumbler and

page_text: consequently the current is disconnected, as in Fig. 6; on turning the key further
round as in Fig. 7, the tumbler snaps back and connects the current as soon as the
cylinder has reached the position in Fig. 4.
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. A pivoted tumbler, circuit terminals co-operating therewith, and a hollow, rotary
downwardly spring-pressed cylinder, having a screw thread on its under side for
actuating the tumbler.
2. The vertical spindle, a hollow cylinder rotarily mounted thereon, having a screw-
thread on its under side, a spring for pressing the cylinder downward, a pivoted
tumbler actuated thereby and circuit terminals co-operating with the tumbler.
3. In an electric switch, the combination of the tumbler i, pivoted in bridge e, the
co-operating terminals gg, the spindle c mounted in bridge e, the hollow cylinder b,
mounted upen and guided by spindle c, the lower end of cylinder spirally cut for
actuating tumbler i, the upper end of cylinder 6 keyed for engagement with the
handle and the spring pressing cylinder b into engagement with tumbler 2, the
whole supported on base-plate k, substantially as described.
Dated this 93rd day of June 1890
THOMAS MARCHER.
FERDINAND ERNECKE.
By Fredk. Walker & Hyde,
4, Moorfields, Fore Street, London, E.C., Agents for the Applicants.