IMPROVEMENTS IN BELL ALARMS
Year: 1882

page_text: LETTERS PATENT to William Phillips Thompson of the Agency for Foreign
Patent Solicitors 6 Lord Street Liverpool in the County of Lancaster and of
323 High Holborn in the County of Middlesex Civil Engineer for an invention
of "IMPROVEMENTS IN BELL ALARMS A communication to him from abroad
by Freeman Norton Cottle, of Boston Massachusetts United States of
Americe
"
PROVISIONAL SPECIFICATION left by the said William Phillips Thompson
at the Office of the Commissioners of Patents on the 24th May 1882.
WILLIAM PHILLIPS THOMPSON of the Agency for Foreign Patent Solicitors
6 Lord Street Liverpool in the county of Lancaster and of 323 High Holborn, in
the county of Middlesex, Civil Engineer. IMPROVEMENTS IN BELL ALARMS,"
a communication to me from abroad by Freeman Norton Cottle of Boston,
Massachusetts, United States of America.
This invention relates to improvements in bell alarms particularly adapted as a
burglar alarm for doors windows or money drawers and, with a slight modification,
as a gong or automatic bell aların for bicycles.
On an ordinary window frame with the usual up and down movable window
sash the alarm is fixed. A bell is firmly secured by means of a nut or equivalent
device to a spindle, the inner end of which is fastened to a plate hinged to another
plate which is secured by means of suitable screws to the window frame; a ratchet
wheel is made in one piece with, or secured to the spindle. On the spindle is
loosely supported a grooved circular wheel provided on its outer periphery with a
yielding ring or band made of india-rubber or other suitable material and adapted
to touch and rest against the window sash so as to cause the wheel to turn around
the spindle when the window sash is raised or lowered.
The interior of the wheel is provided with teeth or projections which actuate
the hammer lever that is hinged to a loose disc supported in the spindle. A pawl
is made to engage with the teeth of the ratchet wheel by the influence of a coiled
spring which connects the rear of the hammer lever and an angular extension of
the pawl. This spring serves also for the purpose of automatically bolding the
En

page_text: outer end of hammer lever in contact with the teeth or projections on the inside of
the loose wheel.
The hammer is connected to the hammer lever by means of a wire.
By means of a spring secured to a plate and pressing on the edge of another
plate I obtain an automatic pressure device for holding a rubber ring on the wheel
properly in contact with the window sash so as to cause the said wheel to rotate,
during the up and down motion of the window sash. The operation of the
improved alarm is as follows: By raising the window sash the ring and its wheel
are caused to turn and in so doing the teeth on the inside actuate the hammer
lever and causes the hammer to intermittently strike against the inside of the bell
during which operation the disc is locked firmly to the spindle and its ratchet
wheel by means of the pawl and coiled spring. By lowering the sash the ring and
wheel move in the opposite direction to that above described causing the lever to
be locked into one of the teeth and to turn with the wheel and disc around the
spindle without giving an alarm.
The mechanism may however if so desired be so arranged as to cause an alarm
to be given on the bell by the motion of the window sash or sliding door or
shutter in either direction.
The invention is not confined to the precise intermediate alarm-mechanism
described as this may be changed without affecting its merit.
In the modification adapted for tricycles or other such vehicles it is attached to
a suitable frame in which the ends of the spindle are secured. A pair of bells are
secured to the spindle and a metallic disc is placed loose on the spindle, which disc
when brought into contact with the rotary tire of the bicycle wheel causes the
gong or gongs to be sounded automatically in the same manner as above described
in relation to the window or door or money drawer alarm. Any suitable lever or
its equivalent may be used in connection with this bicycle alarm to operate it
without departing from the spirit of this invention.

page_text: burgia atau 10 VOIS, VILLOWS, Or money urawers, and with a sight
as a gong or automatic bell alarm for bicycles as will hereinafter be more fully
shown and described; references being had to the accompanying drawings on
which,
Fig. 1, represents a front elevation of the Bell alarm as attached to a window
frame;
Fig. 2, represents a similar view showing the bell as being removed;
Fig. 3, represents a rear view of the alarm; and
Fig. 4, represents a central longitudinal section on the line A. B. shown in
Fig. 2.
Fig. 5, represents a modification of the alarm as applied to Bicycles.
Similar letters refer to similar parts wherever they occur on the different parts
of the drawings.
a represents an ordinary window frame on which 6 is the usual up and down
movable window sash and c the glass pane; d is a bell firmly secured by means of
a nut e¹, or equivalent device, to the spindle e, the inner end of which is fastened to
a plate f, which latter is hinged at f¹ to another plate g, which is secured by means
of suitable screws g'. g. to the window frame a; h is a ratchet wheel made in one
piece with, or secured to the spindle e; On the spindle e is loosely supported the
grooved circular wheel i provided on its outer periphery with a yielding ring or
band k made of india rubber or other suitable material and adapted to touch and
rest against the window sash b as shown in Figs. 1 and 2 so as to cause the wheel i
to turn around the spindle e when the window sash is raised or lowered.
The interior of the wheel i is provided with teeth or projections ¹, ¹, which
actuate the hammer lever 1, that is hinged at m³ to the loose disc m supported in
the spindle e as shown in Figs. 2 and 4. n is a pawl hinged at n' to the disc m,
which pawl is made to engage with the teeth of the ratchet wheel h, by the
influence of the coiled spring o which connects the rear of the hammer lever and
the angular extension n¹¹ of the pawl n as shown in Fig. 2. The spring o serves
also for the purpose of automatically holding the outer end of hammer lever
in contact with the teeth or projections i¹, i, on the inside of the loose wheel i as
represented in Fig. 2.
is the hammer connected to the hammer lever by means of wire as
shown.
By means of the spring G secured to the plate g and pressing on the edge of the
plate fas shown in Fig. 3, an automatic pressure device is obtained for holding the
rubber ring on the wheel i, properly in contact with the window sash b, so as to
cause the said wheel i to rotate during the up and down motion of the window
sash. The operation of the improved alarm is as follows: By raising the window
sash b in the direction as represented by arrows in Figs. 1 and 2, the ring k and
its wheel are caused to turn in the direction marked on said ring in Figs 1 and 2

page_text: .
and in so doing its teeth i¹, ¹, actuate the hammer lever and causes its hammer ¹
to intermittently strike against the inside of the bell d, during which operation the
disc m is locked firmly to the spindle e and its ratchet wheel h by means of the
pawl n and coiled spring o: By lowering the sash b the ring k and wheel i move
in the opposite direction to that above described causing the lever 1 to be locked
into one of the teeth i¹, and to turn with the wheel i and disc m around the
spindle e without giving an alarm.
The mechanism may however, if so desired be so arranged as to cause an alarm
to be given on the bell by the motion of the window sash or sliding door or shutter
in either direction.
The invention is not confined to the precise intermediate alarm-mechanism
as shown and described as this may be changed without affecting the merit of the
invention.
In the modification shown in Fig. 5 p represents a portion of a bicycle driving
wheel and q is its rubber tire as usual; represents a suitable frame in which the
ends of the spindle E are secured. D, D represent a pair of bells which are
secured to the spindle E, and I represents a metallic disc loose on the spindle E
which disc I when brought into contact with the rotary tire q of the bicycle
wheel p, causes the gong or gongs to be sounded automatically in the same
manner as above described in relation to the window or door or money drawer
alarm. Any suitable lever or its equivalent may be used in connection with this
bicycle alarm to operate it without departing from the spirit of this invention.
Having thus fully described the nature construction and operation of the
Invention as communicated to me I wish to secure by Letters Patent and claim :
1st In a bell alarm, the bell d, attached to the spindle e, with loose disc i on
said spindle for actuating the striker mechanism by the motion of the window
sash b or its equivalent as set forth.
2nd A bell alarm composed of bell d, attached to spindle e, with the loose
disc i, for actuating the striker mechanisın, combined with the automatic pressure
device G for holding the wheel i, k in contact with the window sash b or its
equivalent as set forth.
3rd The herein described Bicycle Alarm consisting of one or more bells D, D,
and wheel I arranged upon a common spindle located in a frame r, adapted to
be operated to and from the bicycle tire gas and for the purpose set forth.
In witness whereof I the said William Phillips Thompson have hereunto set.
my hand and seal this twenty second day of November in the year of our
Lord one thousand eight hundred and eighty two.