Tant
Year: 1886

page_text: Date of Application, 8th Apr., 1886.
Complete Left, 24th Dec., 1886.
Complete Accepted, 7th Apr., 1887
JOSEPH MAY, 119 Maysoule Road, Plough Lane, Clapham Junction London,
Electrician & GEORGE JAMES HUTTON, 4 Eaton Terrace Edward Street East
Greenwich Commission Agent do hereby declare the nature of this invention to be as
follows:-
JOSEPH MAY, 119 Maysoule Road, Plough Lane, Clapham Junction London,
Electrician & GEORGE JAMES HUTTON, 4 Eaton Terrace Edward Street East
Greenwich Commission Agent do hereby declare the nature of this invention to be as
follows:-
This invention embraces an Electric Bell, Relay, and double acting Switch, and
Pas 9/thune) Tantrical Circuits as follows:

page_text: the constant current circuit, when door is open the springs are released, and the
constant current circuit is broken the line wire is attached to both springs.
CONTACTS TO ORDINARY WINDOW FASTENINGS.
Brass plates 2" long 1" wide are inserted in side of window frame and on side of
window sash, with a spring fixed to plate on sash to ensure good contact, a brass wire
or strap is inserted in sash from plate to window fastening fastenings being provided
with platinum contacts, one set of plates fitted to bottom sash & one to top sash, and
line wire fixed to each sash.
CONTACT MAKERS.
The advantages of this Pattern Contact Maker is that when Switch springs are
closed, if any window or door is not properly closed, or any contact maker defective,
or if fitted to ordinary window fastenings, not properly secured, the Circuit will be
broken and the Bell will continue ringing until the defect is remedied.
The ordinary window fastenings may be altered to act as Contact Makers if
desired.
The Contact Makers would be fixed above the sash, instead of at the bottom, as in
the ordinary "Open" Circuit Alarms thereby ensuring greater safety, as if window
is opened the Contact Maker cannot be tampered with.
If put at the bottom as in the ordinary alarms the Burglar can easily follow the
sash up and prevent the Contact Makers acting, and of course, rendering Alarm Bell
useless.

page_text: JOSEPH MAY of 119, Maysoule Road, Plough Lane, Clapham Junction S.W. in
the county of Surrey Electrician and GEORGE JAMES HUTTON of Eaton Terrace,
Edward Street, East Greenwich, in the county of Kent, Commission Agent 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 consists of an Electric Bell, Relay and Double Acting Switch, and
comprises three independent electrical circuits.
The windows and doors are fitted with contact makers made to break the current,
when either of them are opened. When the Alarm is required to be ready for use,
the switch inust be placed to "On." This completes the circuit through the door and
window contact makers, and passes a permanent current through them, and also
through the Bell coils, causing the armature to be drawn to the coils and to hold fast
to them.
Should a door or window be opened, thus breaking this circuit, the armature will
drop back on to the Bell Spring, and there pick up a local current. This local
current passes through the relay coils (the armature of relay forms a connecting link
of the constant current circuit) and also through the bell.
Therefore When the circuit is broken and the armature released, the local current
causes the hell to commence ringing and pulling the armature of relay to the coils
breaks the constant current circuit.
Thus, should the door or window be again closed (or supposing the wire to have
been cut should that be repaired); it cannot complete the circuit and stop the Bell,
which can only be stopped by placing the switch back to "Off."
To prevent the relay armature from vibrating and completing the constant current
circuit again, it is so constructed that immediately the armature is drawn to the coils,
a local current is passed permanently through the relay coils causing the armature to
hold fast to the coils and prevent all possibility of the circuit being restored.
Contact pieces may be arranged in or on safes jewel cases plate chests and similar
receptacles and the constant current passed through-the contact pieces being
arranged so that the current is broken if any of them are opened and an alarm is
given the same as when a door or window is opened.
It will be obvious that our apparatus can be readily adapted for street fire alarms
and would always be sure of being ready and in order or would at once indicate if it
were not so

page_text: DESCRIPTION OF THE DRAWINGS.
is the constant current battery, y the relay battery, and the bell battery. The
various circuits working from these batteries being traced out by the dotted lines the
constant current circuit from the battery a being marked 1, the relay current circuit from
the battery y marked 2, and the bell current circuit from the battery marked 3; the
two latter currents passing over the same wire for a considerable part of the circuit.
When the switch W stands to "On" the constant current is passing through the
relay armature and spring A to the contact screw B thus completing the circuit.
If this circuit is broken a local current is passed through the relay coils G
by the bell armature E falling back on the spring F (as is well understood)
and thus causing the armature A to be drawn to them thus again breaking the
constant circuit by parting A and B, and also by pressing spring to D passing a
permanent local current through the coils G and causing the armature A. to hold fast
to these relay coils and prevents the constant current circuit being restored through A
and B. When the switch W is placed back to "Off" the currents are all disconnected
and the armature A resumes its normal position, viz-drops back onto the contact
screw B thus dispensing with replacing gear as used in ordinary continuous ringing
bells. The switch W when moved to the position "On" first closes the constant
current circuit C* D* by the end S of the switch-pushing together the contact pieces C¹
and D while the end T of the switch subsequently pushes together the contact
pieces A B thus closing circuit A* B* the current C* D* being thus first passed
through the Bell coils and thereby drawing up thereto the Bell armature .E.
:
Greater safety is ensured by the circuits being closed instead of open as in existing
alarms should any person enter a house or premises (fitted with our improved electric
alarm) by any way not provided with contacts and seeing the wires of our apparatus
and were to cut them, thinking thus to render the alarm Bell useless (as would be the
case in the ordinary electric alarm with open circuits) the constant current would at
once be broken, and the bell would ring the same as if a door or window were opened.
The ordinary window fastenings H and J may be utilised to act as contact makers
completing the circuit through the springs M. and N arranged in the window frame or
as shewn at 0 (or otherwise conveniently arranged) and the door may be fitted as
shewn at P or in any other convenient manner and should any of these fastenings so
fitted have been neglected or a door or window left open or the wires cut as before
described or injured in any way so as to break the circuit when the switch W is placed
to "On" for the night, the bell will commence ringing and will continue to do so
until the defect is remedied thus ensuring that all parts of a house or premises are
properly secured as it will at once show something is wrong.
Contact makers constructed to break current are more certain in their action than
those made to make current, the latter being liable to get dirty and make imperfect
connection.
Should the former get dirty the defect will be discovered immediately the
switch W is placed over to "On" to bring the alarm into uso; by causing the Bell
to ring.
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 we claim is :-
1st. In an electrical burglar alarm the combination of an electric hell relay with a
double acting switch W and three independent circuits arranged to act substantially
in the manner and for the purposes hereinbefore described and represented in the
drawings annexed,

page_text: 2. The use and application of an electric relay as and for the purposes herein before
set forth.
3. The improved arrangement and construction of electric burglar alarms in which
a constant current circuit is completed through the ordinary fastenings or special
contact pieces arranged in or on the doors or windows or on plate chests safes and
similar receptacles, and-if any
of them are opened disconnected or unfastened the
wires severed or the circuit otherwise broken-an alarm given substantially in the
manner hereinbefore described and represented in the drawings annexed.
4. The improved construction of electrical burglar alarms arranged to act substan-
tially in the manner and for the purposes hereinbefore described and represented in the
accompanying drawings.