A Time Electric Switch.
Year: 1893

page_text: A Time Electric Switch.
We, EDWARD CARSTENSEN DE SEGUNDO, of 28 Victoria Street, Westminster,
Consulting Engineer, and WALTER DERHAM, of 76 Lancaster Gate, in the
County of Middlesex, Barrister at Law, 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 an electric switch combined with clockwork so that, at
the lapse of a predetermined time after contact is made by it, contact is suddenly
and completely broken, as we shall describe referring to the accompanying
drawings.
Fig. 1 is a plan of a time switch according to our invention.
Figs. 2 and 3 are side views of parts as hereinafter referred to.
We gear a spindle A to an escapement, flyer or other clockwork regulator so
that when it is caused to revolve by a spring it will make a certain part of a
revolution in the predetermined time. On this spindle we mount, free to turn, a
lever arm B which is urged in one direction by a spring S and has a fork F' F'
engaging within its gab a pin or stud projecting from another arm C which is
loose upon the spindle A and has at its end a piece of metal M insulated upon it.
Two contact pieces of metal N N' fixed insulated on the base of the instrument
are respectively connected to the circuit wires.
A spring D fixed at d carries at its end a latch E and has attached to it a spring
pawl F engaging a ratchet wheel G which is fixed on the spindle A. A roller R
is mounted on the base. The switch is operated in the following manuer.
As the
The spring arm B is turned by hand, or it might be by a key, straining the
spring S until it is caught by the latch E. The prong F' of its fork pushes the
arm C into the position where the metal M at its end makes conducting connection
of the two contact pieces N N₁ thus closing the circuit. The arm B is drawn
back by the spring S but as the spring arm D must move back with it, and its
pawl F is engaged with the ratchet G, the spindle. A is caused to turn.
rotation of this spindle is governed by the escapement or flyer, a certain time
determined by the clockwork elapses until the latch E and the arm B held by it
attain the position indicated by the dotted lines E' B' Fig. 3. In this position of
the parts, the latch E' passing under the roller R is urged down, allowing B' to
escape from it whereupon the arm B makes a rapid back stroke to the position
indicated by the dotted line B' in Fig. 1 the prong 2 of its fork suddenly throwing
the arm C to the position C' where its metal piece M' no longer makes conducting
connection of the pieces N N', the circuit being thus opened.
Under the base of the instrument there is a space H occupied by suitable
clockwork or time regulator of any known kind governing the movement of the
spindle A.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is
-
A time electric switch, substantially as described with reference to the accom-
panying drawings.
ليوم
1
1000
ABEL & IMRAY,
Agents for the Applicants...