Improvements in Apparatus for Connecting and Disconnecting Electric Circuits.
Year: 1890

page_text: Date of Application 7th Mar., 1890
Complete Specification Left, 6th Dec., 1890-Accepted, 24th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Connecting and Disconnecting
Electric Circuits.
I, SAMUEL BARTON MCLELLAN, of 10, Norfolk Terrace, Sidcup, in the County of
Kent, Telegraphic Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of my invention is to obtain a more simple and efficient means than
hitherto for connecting and disconnecting electric circuits.
According to my invention I employ a rod mounted in bearings so as to be capable
of sliding longitudinally when required. There may be a spring placed on this rod so
as to give it a tendency to advance in one direction longitudinally. On this rod I
provide screw or other contact pieces which connect or disconnect electric circuits on
the movement of the rod in a longitudinal direction.
In applying my invention to a burglar or other alarm, I place the rod carrying the
contact pieces parallel to an armature on which I provide a projection, I also place a
projection or catch on the longitudinally sliding rod which catch comes against and
is held by the projection on the armature when the spring on the longitudinally
sliding rod is compressed. On the armature being withdrawn (by for example con-
necting or making the current through the opening of a door or by the burning of a
fire fuse) the projection on said armature comes away from the catch on the longi-
tudinally sliding rod so allowing the said rod to move longitudinally by means of its
spring and thereby to connect the circuit to a bell or bells which latter ring until the
longitudinally sliding rod is pushed back to its normal position.
By my invention any number of circuits may be connected or disconnected at one
and the same time or otherwise and the rod may be lengthened or shortened to suit
the number of contacts required to be made or disconnected. Apparatus constructed
according to my invention can be placed and used in any position and so possess a
great advantage in this respect over those at present in use.
Dated this 7th day of March 1800
COMPLETE SPECIFICATION.
Improvements in Apparatus for Connecting and Disconnecting
Electric Circuits.
1, SAMUEL BARTON MCLELLAN, of 10, Norfolk Terrace, Sidcup, in the County
of Kent, Telegraphic Engineer, 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 object of my invention is to obtain a more simple and efficient means than
hitherto for connecting and disconnecting electric circuits, and the invention consists
in the employment therefor of a rod free to slide longitudinally but controlled by a
spring and projection on the rod which projection takes into a projection on, or
slot in, an armature, all as hereafter described and illustrated with reference to the
accompanying drawings.
Figure 1 shows such an apparatus for connecting and disconnecting electric circuits
constructed according to my invention;
Figure 2 shows a similar apparatus as applied to an alarum, and
Finn 2:
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page_text: Similar letters of reference refer to like parts in all the figures.
A is the rod mounted in bearings B so as to be capable of sliding longitudinally
when required. Cis the controlling spring placed on the rod A so as to give this
rod a tendency to advance in one direction longitudinally. On this rod A I provide
screw or other suitable contact pieces DE which connect or disconnect electric circuits
on the movement of the rod A in a longitudinal direction; D'E' are the corresponding
contact plates on the base plate of the apparatus.
In applying my invention to a burglar or other alarm, I place the rod A carrying
the contact pieces D E parallel to an armature G of an electro-magnet or magnets J
on which I provide a projection G, or instead of a projection on the armature Ga
slot may be made therein such as is shown at G2 in the detail view Figure 3, which
latter view shows a side view of the armature (+ detached. His a projection or catch
on the longitudinally sliding rod A which catch comes against and is held by the
projection G or by the slot G2 on the armatare when the spring Con the longi-
tudinally sliding rod A is compressed; on the armature being withdrawn (by for
example connecting or making the current through the opening of a door, or by the
burning of a fire fuse) the projection G¹ on the armature G comes away from the
catch or projection H on the longitudinally sliding rod A as shown at Figure 2 and so
allowing the said rod to move longitudinally by means of its spring and thereby
to connect a circuit for a bell or series of bells, thus causing the latter to ring until
the longitudinally sliding rod A is pushed back to its normal position as shown at
Figure 1.
By my invention any number of circuits may be connected or disconnected at one
and the same time or otherwise and the rod A may be lengthened or shortened to suit
the number of contacts required to be made or disconnected. Apparatus constructed
according to my invention can be placed and used in any position and in this respect
possess a great advantage over those at present in use.
At Fig. 1 the rod A is brought back by hand. At Fig. 2 this is accomplished by
the lever K which may be operated by a rod or cord from a distance.
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 :-
First: In apparatus for connecting and disconnecting electric currents the
longitudinal controlled sliding rod A as and for the purposes set forth.
Second In apparatus for connecting and disconnecting electric circuits the
spring controlled longitudinally sliding rod having projection on same for acting on
a projection on or a slot in a corresponding armature of an electro magnet whereby
electric currents may be connected and disconnected, constructed, arranged and
operated substantially as and for the purposes hereinbefore described with reference to
the accompanying drawings.
Third The apparatus for connecting and disconnecting electric circuits constructed
arranged and acting substantially as and for the purposes set forth.
Dated this 8th day of December 1890.
Dated GITIS VUL Qay on Decemide 1.
S. B. MOCLELLAN.
By Brewer & Son,
33, Chancery Lane, London, Agents.