Year: 1897

page_text: I, EDMUND GEORGE KENDALL, of 53, High Street, Harborne, in the County of
Warwick, Architect, do hereby declare the nature of my said invention to be as
follows:-
My invention has for its object an improved burglar alarm which is suitable
for speedy attachment to doors, windows, drawers and other places and positions
which are likely to be touched or otherwise opened or interfered with by burglars
or meddlers.
My device or burglar alarm consists of a spring lever and percussion cap holder
or its equivalent and I prefer to make the main portion of the device from one
strip of spring or other steel or metal. The strip of steel is bent round in such
a manner that the ends have a powerful tendency to go apart and to so remain.
One end of the spring projects and is cranked to receive a guide plate by preference
carved to the circle made by the other end of the spring and it is slotted to embrace
the guide piece, the guide piece being bent to limit the travel of the loose end of
the spring, the bent piece forming the hammer of the alarm. Then a little
distance from the hammer or bent piece the plate is bulged upwards to form a raised
anvil or nipple for the cap which may be a paper percussion cap. To hold the
cap in the right position I apply a spring clutch under which the cap is tightly
held. In applying the device the two ends of the springs are pressed together
and then thrust between the door window drawer etc., which holds the device and
spring in compression. Immediately the device is liberated such as by opening
the door drawer or window the spring is liberated and the cap is struck and the
alarm made,
D1 11011
11007
GEORGE BARKER
Agent for Applicant,
77, Colmore Row, Birmingham.
I, EDMUND GEORGE KENDALL, of 53, High Street, Harborne, in the County of
Warwick, Architect, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention has for its object an improved burglar alarm which is suitable

page_text: for speedy attachment to doors windows, drawers, and other places and positions
which are likely to be touched or otherwise opened or interfered with by burglars
or meddlers.
My device or burglar alarm consists of a spring lever and percussion cap holder
or its equivalent and I prefer to make the main portion of the device from one
strip of spring or other steel or metal. The strip of steel is bent round in such
a manner that the ends have a powerful tendency to go apart and to so remain.
One end of the spring is cranked to receive a guide plate by preference
curved to the circle made by the other end of the spring and it is slotted to embrace
the guide piece, the guide piece being bent to limit the travel of the loose end of
the spring, the bent piece forming the hammer of the alarm. Then a little
distance from the hammer or bent piece the plate is bulged upwards to form a raised
anvil or nipple for the cap, which may be a paper percussion cap. To hold the
cap in the right position I apply a spring clutch under which the cap is tightly
held. In applying the device the two ends of the spring are pressed together
and then thrust between the door window drawer &c. which holds the device and
spring in compression. Immediately the device is liberated such as by opening
the door, drawer or window the spring is liberated and the cap is struck and the
alarm made.
In order that my invention may be more clearly understood and easily carried
into practical effect I have appended hereunto a double sized sheet of drawings
upon which I have illustrated examples of my improved burglar alarm.
Figure 1 is a part sectional elevation shewing my alarm fixed in position in a
drawer.
Figure 2 is a side elevation of my burglar alarm shewing the jaws open.
Figure 3 is a plan view of Figure 3.
Figure 4 is a similar view to Figure 2 shewing a modified form of my alarm.
Figure 5 is a similar view to Figure 4 shewing the part where the paper per-
cussion cap fits in section.
Figure 6 is a similar view to Figure 2 shewing a further modification.
In carrying my invention into practice I prefer to make the main portion of jaws
of my device from a single strip of flat spring steel or metal A. This strip of steel
is bent round in such a manner so that the jaws or ends a¹ and a² have a powerful
tendency to separate or go apart and to remain in that position as shewn at
Figures 2, 4 5 and 6. The end or jaw a¹ is cranked at a³ and to this cranked part
the guide plate a' is fixed which guide plate is by preference curved to the circle
made by the opening and closing of the jaw a² and passes through the slot a
formed in this jaw the end as of the guide piece being bent to limit the travel
or expansion of the jaws the bent part a also forming the hammer of the alarm for
striking the percussion or the jaw a² may work in a slot formed in the guide
plate a as shown at Figure 7. The part of the jaw upon which the hammer
strikes is bent upwards to form a raised anvil upon which the percussion cap is
placed and in order to hold this cap in proper position I provide the spring
catch as the head of which clips or holds the cap B as shewn at Figure 1. To fix
my alarm in position the jaws are pressed together and then thrust between a
drawer as shewn at Figure 1 or between a door, window or other convenient part
which holds them in compression. Immediately the drawer or other place where
the alarm is placed is opened the jaws are released and fly back thus striking the
percussion cap and the alarm is given.
In the method as shewn at Figures 4 and 5 I have shewn a slight modification.
In this case I dispense with the spring a8 and form the groove a³ for the per-
cussion cap to fit into.
At Figure 6 I have shewn my alarm adapted for using as a metal percussion
cap. In this case I fix the nipple a¹ into the jaw a² underneath the hammer so
that when a cap is placed on the nipple and the jaws released the hammer will
strike it and sound the alarm. The alarm may be provided with the chain D for
attaching it to the drawer, window, door, or other part when it is placed.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
CLAIMS.
First. The improved burglar alarm consisting essentially of the spring jaws a¹
and a² and a guide plate such as at or its equivalent working in a slot in the
jaw a² or in the guide the end a of the said guide plate being bent so as to form
the hammer for striking the percussion cap with the arrangement for securing or
receiving the cap substantially as herein set forth and as shewn upon the drawings.
Second. The burglar device herein set forth and shewn upon the accompanying
drawings by Figures 1 to 7 inclusive.
355
VILLO
Fellow of The
EDMUND GEORGE KENDALL,
By George Barker,
Chartered Institute of Patent Agents,
Agent for Applicant,
77, Colmore Row, Birmingham.