Circuits in Connection with Call or Alarm Boxes.
Year: 1887

page_text: Date of Application, 4th Apr.. 1887
Complete Left, 4th Jan., 1888
Complete Accepted, 10th Feb., 1888
Circuits in Connection with Call or Alarm Boxes.
I, FREDERICK THOMAS SCHMIDT, of Hustlergate, Bradford, in the County of York,
Electrician, do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in closed circuit apparatus, and has
for its object the automatic breaking and closing of the electric circuit in such a
manner, that when the apparatus is put in operation, the electric current will operate
an apparatus at the central or distant station, and thereby indicate the box and district
from whence the alarm or call has been sent.
I accomplish my object in the following manner. The apparatus is secured inside
a box and consists of a series of wheels mounted in suitable framework, and around
the axles and secured to a wheel thereon is a coiled spring, and on the said axle is
secured a lever. The spring is coiled up tight somewhat like the spring of a clock,
and when the before mentioned lever is operated, the spring is coiled tighter by which
the wheels are put into operation.
On one of the shafts is a disc having a number of pegs or pins inserted which
project therefrom and as the disc rotates the pegs come in contact with an arm
attached to a lever forming part of the electric circuit with one of the terminals,
raising the lever out of contact with the other terminal, thereby breaking the circuit
as often as there are pegs in the disc, thus indicating at the central or distant station
the number of breakages, by which the attendant knows the box and district from
whence the alarm has been sent.
Dated this and dave of Anril 1887
JOHN WAUGH,
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Making and Breaking Electrical
Circuits in Connection with Call or Alarm Boxes.
I, FREDERICK THOMAS SCHMIDT, of Hustlergate, Bradford, in the County of
York, Electrician, 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 relates to certain improvements in closed circuit apparatus, and has
for its object, the automatic breaking and closing of the electric circuit in such a
manner that, when the apparatus is put in operation, the electric current will operate
an apparatus at the central or distant station, and thereby indicate the box or district
from whence the alarm or call has been sent; and consists in mounting a series of
wheels in framework, and placing around the axle of one of the wheels a coiled spring,
and on the said axle a disc or wheel having a nuinber of pins projecting therefrom;
so that on the said disc a wheel being liberated, the coiled spring causes the same to
revolve, and the pins to come in contact with an arm, and thereby to break the circuit
as often as the pins raise the said arm, and thus indicate at the central station the
number of breakages.
In describing my apparatus more in detail, reference is made to the accompanying
drawings, in which Fig. I represents a front elevation of a portion of my apparatus
as it may be fixed inside a box. Fig. 2 a side view, a portion of the box being
removed for better illustration, and Fig. 3 a detail of the liberating lever and spring
fixed in front of the mechanism shown by Fig. 1.
The apparatus is secured inside a box indicated by the letter A, and consists of a
series of spur wheels and "fly" F, supported by a suitable frame, and arranged
similar to the ordinary striking part and "fly" of a time clock; the spring S being
coiled tightly round what is termed in clocks as the "click wheel shaft" C, and to
which is also secured a disc or wheel D, having a number of pins E. projecting
therefrom, and an arm D' extending for some distance beyond the periphery.
When the disc or wheel D is moved round in the direction of the arrow, until the
arm D is in the position as shown by dotted lines, it is there held by a catch spring G
in a position ready for being moved in the opposite direction to that shown by the
arrow and giving an alarm when released, which is effected by pulling down at the
knob H, attached to the liberating lever J shown by detail Fig. 3, and mounted on
the inside of the inner door D2, the outer door or plate G being by preference of
glass.
By pulling down at the knob H, the short arm of liberating lever J is moved such
a distance that, the catch spring G, releases the arm D¹, thereby allowing the coiled
spring S to move or rotate slowly in the direction opposite to that indicated by the
arrow, until the arm D¹ of the disce or wheel D is back against the stop stud K, as
shown on drawing Fig. 1; the pins or projections E coming by rotation in contact
1

page_text: with an arm L, mounted on the lever M, which is in metallic connection with
terminal N; so that on the lever M being raised out of contact with the terminal
connection N¹, the circuit is broken as often as the said lever is raised by the pins or
projections E on the disc or wheel D; thus indicating at the central. or distant
station by any well known apparatus fixed at the said station, the number of breakages
by which the attendant will know the box or district from whence the alarm has
been sent.
In order that the person sending the alarm may know that the same has received
attention, the attendant breaks the circuit, thereby causing the hammer R, to strike
the gong
the wheel or disc D, can then be turned until the arm D' is held again
by the catch spring G ready for sending another alarm or call..
R¹ ;
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
An apparatus for automatically making and breaking electrical circuits any pre-
determined number of times in a manner by which the attendant may know from
whence the alarm has been sent, all being arranged substantially in the manner shown
and described.
JOHN WAUGH,
Agent.