Improvements in Automatic Alarm Bells or Gongs for use as Burglar Alarms and for other Analogous Purposes.
Year: 1889

page_text: Date of Application, 23rd May, 1889
Complete Specification Left, 24th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Automatic Alarm Bells or Gongs for use as
Burglar Alarms and for other Analogous Purposes.
I JOSEPH HENRY DA FONSECA of 51 Shaw Road Heaton Moor, near Stockport in
the county of Lancaster Designer do hereby declare the nature of this invention to be
as follows:-
My invention relates to apparatus for use as what are known as "burglar
alarms" and for other analogous purposes and consists in a simple but effective
arrangement of apparatus by means of which a spring previously wound up may
upon any movement of the parts to which such apparatus is applied be allowed
to cause an alarm to be sounded by means of a bell or gong. The arrangement
of apparatus in which my invention consists is particularly applicable to the handles
of doors and to the catches or sash fasteners and sashes of windows.
I will. for convenience in the first place describe my invention as applied to a
door.
According to my invention I provide any suitable arrangement of alarm apparatus
which is caused to "sound" when a spring previously wound up is liberated. I
provide the said alarm-apparatus with a catch or detent which catch or detent
is prevented from liberating the spring by means of a double-ended lever to the
opposite ends of which I connect a band of indiarubber or other suitable material
which is passed around the handle of the door to which my invention is applied.
Upon the handle of the door being turned the catch or detent will be allowed to
liberate the spring and the alarm-apparatus may be caused to sound. The aların
apparatus may be permanently secured to the door or may be secured to the
door by a projecting part which may pass into a socket secured to the door or a
projecting part may be secured to the door and have placed upon it a socket
formed or provided upon the alarm-apparatus. At such times as it is desired to
render the alarm-apparatus inoperative the band of indiarubber or other suitable
material may be removed from the door and the alarm apparatus may, if not
permanently secured to the door be removed from the door, to be again replaced
when desired. I provide the alarm-apparatus with an index or finger or other
device which indicates when the double-ended lever is in position to prevent the catch
or detent from liberating the spring. I also provide the alarm apparatus with an
index which indicates when the spring is "wound up" and when it is "unwound."
In applying my invention to a handle which is moved in a straight line or curve
instead of being turned, when the door to which such handle is attached is to be
opened I employ a knob or pulley around which I pass the band of indiarubber or other
suitable material above referred to and I cause the moving of the handle of the door
to cause the knob or pully above mentioned to turn and thus allow the catch or
detent to liberate the spring of the alarm-apparatus.
In applying my invention to window sashes or casements I may pass the band of
indiarubber or other suitable material around the knobs of the catches or fasteners by
means of which such window sashes or casements are secured, so that upon such
catches or fasteners being turned or moved the double-ended lever of an alarm-
apparatus similar in construction to that above described will be moved so as to allow
the catch or detent of the alarm-apparatus to liberate the spring and cause an alarm
to be sounded. In some cases I provide the sash or casement with a knob or part or
lever which when the window-sash or casement is raised or opened so acts upon the
band of indiarubber or other suitable material as to reduce or increase the tension of
one portion of such band of indiarubber or other suitable material so as to cause the
double-ended lever to be moved so as to liberate the spring of the alarm-apparatus.
which previously had been "wound up."
"

page_text: My invention besides being applicable for use as a
applicable for other analogous purposes.
'burglar alarm" is also
D
11
W. T. CHEETHAM,
Manchester, Agent to the Applicant.
COMPLETE SPECIFICATION.
Improvements in Automatic Alarm Bells or Gongs for use as
Burglar Alarms and for other Analogous. Purposes.
I, JOSEPH HENRY DA FONSECA of 51 Shaw Road, Heaton Moor near Stockport in
the county of Lancaster, Designer, 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 :-
"
My invention relates to apparatus for use as what are known as burglar alarms"
and for other analogous purposes and consists in a simple but effective arrangement
of apparatus by means of which a spring previously wound up may upon any move-
ment of the parts to which such apparatus is applied be allowed to cause an alarm to
be sounded by means of a bell or gong. The arrangement of apparatus in which my
invention consists is particularly applicable to the handles of doors and to the catches
or sash-fasteners and sashes of windows.
I will for convenience in the first place describe my invention as applied to
a door.
According to my invention I provide any suitable arrangement of alarm apparatus
which is caused to sound when a spring previously wound up is liberated. I provide
the said alarm apparatus with a catch or detent, which catch or detent is prevented
from liberating the spring by means of a double ended lever to the opposite ends of
which I connect a band of indiarubber or other suitable material which is passed
around the handle of the door to which my invention is applied. Upon the handle
of the door being turned the catch or detent will be allowed to liberate the spring
and the alarm apparatus may be caused to sound. The alarm apparatus may be
permanently secured to the door or may be secured to the door by a projecting part
which may pass into a socket secured to the door or a projecting part may be
secured to the door and have placed upon it a socket formed or provided upon the
alarm apparatus. At such times as it is desired to render the alarm apparatus
inoperative the band of indiarubber or other suitable material may be removed from
the door and the alarm apparatus may if not permanently secured to the door be
removed from the door to be again replaced when desired. I provide the alarm
apparatus with an index or finger or other device which indicates when the double
ended lever is in position to prevent the catch or détent from liberating the spring.
I also provide the alarm apparatus with an index which indicates when the spring is
wound up and when it is unwound."
I
Iz
Figs. 1, 2, 3, and 4 of the accompanying drawings illustrate one method of carrying
my invention into effect. Fig. 1 is an elevation and Fig. 2 a plan of that which is
shown in Fig. 1. Figs. 3 and 4 are respectively an elevation and an end view showing
portions detached.
1
...
a, a are plates secured together by pillars b. Carried by the plates a, a¹ is an
axle c. To the axle c is secured one end of a coiled spring d the other end of the
coiled spring d being secured to one of the pillars b. The axle c'is provided with a
key e by means of which it may be turned in order to "wind up" the spring d.
Mounted loose upon the axle c is a toothed wheelf which at times is rotated by the
spring d which acts by means of a ratchet wheel'g fast upon the axle c' and a click h
upon the wheel. The axle 'c and the parts carried thereby are shown detached
in Fig. 5.
"
T
The wheel gears into the teeth of a pinion j fast upon the axle k, fast upon
which axle k is a pallet wheel l' which by means of a pallet m at times vibrates a
hammer n so as to cause a bell o to be sounded.

page_text: The pallet
m and hammer n are mounted upon an axle p. Fast upon an axle
is a double ended lever r. Upon the double ended lever is a projecting part
against which at times rests a projecting part s' upon a spring-levers secured at one
end to the plate a. Projecting from the spring-levers is an arms which at times
is in the path of an arm t fast upon the axle p.
The plates a, a¹ and parts carried thereby are secured to a base board A to which
is secured a box A' by which the various parts are secured from injury and dust.
To the end of the two ended lever is jointed a wire u which passes through a
hole formed through the side of the box A'.
When the above described apparatus is being applied to a door, the said apparatus
may be secured to the door in any convenient manner. To the end of the two
armed lever I secure one end of a band v of indiarubber which band v of india-
rubber is passed around the knob w of the handle of the door and is secured by its
other end to the wire u as illustrated in Fig. 6 of the accompanying drawings. The
tension of the band v of indiarubber is so adjusted that when the door is shut and
latched the double ended lever r will be held in such position that the projecting
part of such lever will be upon the projecting parts of the spring-levers so as
to maintain the spring-levers in such position that the arm s² thereon will be in
the path of the arint and thereby prevent the axle p and hammer n from vibrating.
The spring d is now wound up by means of the key e. In order that the part
upon the double ended lever may be readily retained upon the part s upon the
spring levers while the spring d is being wound up the lower parts of the double
ended lever r and spring levers are held in position by the person who is winding
up the spring d.
So long as the knob to remains unturned the parts will remain in the position
described but if the knob w be turned either in the direction indicated by the arrow B
or in the opposite direction, the double ended lever r will be turned upon its axis
and the projecting part r will be carried away from the part s'. The spring lever s
will then be at liberty to move in the direction indicated by the arrow C and carry
the arms clear of the arm t thus leaving the axle p and hammer n at liberty to be
vibrated by the spring d and pallet m and cause the bello to be sounded by the
hammer n and thus sound an alarm.
Resting upon one of the coils of the spring d is one end of a slide x capable of
being, slidden in a guide y secured to the board A. When the spring d is being
"wound up" its diameter will be reduced, thereby allowing the slide x to descend.
When the spring d is fully wound up, an inscription "wound up "marked upon the
slide is brought opposite to an opening al in the guide . When the spring d is
"unwound" the slide a will be raised until an inscription" not wound" thereon is
brought opposite the opening x¹. By means of the slider and the inscriptions
thereon, it may be readily ascertained whether the apparatus is "wound up" or
"unwound."
In applying my invention to a handle which is moved in a straight line or curve
instead of being turned when the door to which such handle is attached is to be
opened I employ a knob. or pulley around which I pass the band of indiarubber or
other. suitable material above referred to and I cause the moving of the handle of
the door to cause the knob or pulley above mentioned to turn and thus allow the
catch or detent to liberate the spring of the alarm apparatus.
This portion of my invention is shown in Fig. 7 of the accompanying drawings.
is the handle of the door which is capable of being moved in the direction of a
line D, D. 2 is a handle capable of being turned upon a stud or pin 3. The
band of.indiarubber or other suitable material by which the alarm apparatus is
brought into operation is passed around the handle 2. Secured to the handle z is
one end.ofta.cord or band 4. which band is passed once or two or more times around
the handle 2 and to the other end of which cord or band 4 is hung a weight 5. When
the alarm apparatus has been "wound up" and the cord or band 4 arranged as
above described any movement of the handle in the direction of the line D, D
will cause the handle 2 to be rotated, thereby causing an alarm to be sounded.

page_text: In applying my invention to window-sashes or casements I may pass the band of
indiarubber or other suitable material around the knobs of the catches or fasteners
by means of which such window-sashes or casements are secured, so that upon such
catches or fasteners being turned or moved the double ended lever of an alarm
apparatus similar in construction to that above described will be moved so as to allow
the catch or detent of the alarm apparatus to liberate the spring and cause an alarm
to be sounded. In some cases I provide the sash or casement with a knob or part or
lever which when the window-sash or casement is raised or opened so acts upon the
band of indiarubber or other suitable material as to reduce or increase the tension
of one portion of such band of indiarubber or other suitable material so as to cause
the double ended lever to be moved so as to liberate the spring of the alarm apparatus
which previously had been "wound up."
Figs. 8 and 9 are respectively an elevation and a plan showing one method of
applying my invention to window-sashes or casements.
zº
The band v of elastic or other material from the two armed lever I pass around
the knob 6 of the catch 7 of the sash fastener and the part 8 of the sash fastener.
Should the catch 7 of the sash fastener be moved the two armed lever would be
turned and an alarm would be sounded.
↓
Another method of applying my invention to a window sash or casement is shown
in Fig. 10. According to this method I secure to the movable sash 9 of the window
a knob 10 and to the framing 11 of the window I secure two pegs 12 and 13. The
band of elastic or other suitable material connected by its ends to the double ended
lever and wire u I pass around the knob 10 and pegs 12, 13.
Should the sash 9 be raised or lowered, the tension of the portion or the
portion of the band of elastic or other material will be increased and thereby
cause the double ended lever to be turned and cause an alarm to be sounded.
7"
In order to enable the alarm apparatus to be secured to and removed from the
door, window or other part when required, I provide the alarm apparatus with
plates 14 formed or provided with holes by means of which the apparatus may be
hooked upon nails or hooks secured to the door or other part to which the alarm
apparatus is to be attached. When desired the alarm, apparatus can be removed
from the said nails or hooks.
Instead of the plates 14 I may secure a projecting part to the alarm apparatus or
to the door or other part which projecting part may pass into a bracket or mortice
fixed to the door or other part to which the alarm apparatus is to be attached or to
the alarm apparatus.
My invention besides being applicable for use as a "burglar alarm" is also
applicable for other analogous purposes.
r
It is obvious that parts of the apparatus constructed; according to my invention
may be considerably modified without departure from the principles of my invention.
An apparatus constructed according to my invention may be readily applied to a
door or window-sash and the handle of the door or the sash-fastener. of the window
being only employed to put the apparatus in action the apparatus may be readily
applied to one door or window or to another door or window.
An apparatus constructed according to my invention may be applied to two doors
or windows so that upon either of the doors or windows being opened an alarm will
be sounded.
2
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 :-
1. The herein before described arrangement of automatic alarm bell. or gong which
consists in an arrangement of, apparatus for sounding an alarm when a certain part
of such apparatus is by the movement of the handle of a door or the movement of
any other part to which the said part of the said apparatus is connected, moved so
as to release the mechanism by which the alarm is sounded..
2. The hereinbefore described arrangement of automatic alarm apparatus con-
sisting in a bell sounded by mechanism released or allowed to act when a certain

page_text: part is moved by means of bands or cords of elastic or other material connected to or
placed around the handle of a door or connected to any other part so as to be
moved thereby, substantially as herein before described.
3. The hereinbefore described arrangement of alarm apparatus consisting in a
double ended lever such as r, spring lever such as s, arm such as t, spring such as d,
wheel such as f, pinion such as j, pallet wheel such as l, pallet such as m, and
hammer such as n, all constructed arranged, and operating in conjunction with a bell
or gong such as o, substantially as herein before described in reference to and illustrated
in and by the accompanying drawings.
Dated this Twenty-second day of February 1890.
W. T. CHEETHAM,
Manchester, Agent to the Applicant.