Improvements in Portable Burglar Alarm Fastenings for Doors and Windows.
Year: 1889

page_text: Date of Application, 19th June, 1889
Complete Specification Left, 4th Sept., 1889-Accepted, 19th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Portable Burglar Alarm Fastenings for Doors
and Windows.
GEORGE JOHN BELLINGHAM 21 Warner Street Barnsbury London N. Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
A wedge shape block having teeth at each side of its base to prevent it from slideing
when the door or window is being forced. It also has sharp pins at its base, to enable
it to be fixed at any required distance from the door, or lower half of window. It has
a hole through from top to base, to allow a hammer-lever & springs to work & lay
down clear of the top & bottom. It is worked in the following manner, a flat steel
spring along the centre clear of its base, fastened at the thickest end of the Wedge
Block close to the hammer block; at such an angle that gives the other end of the said
spring a upward tension, which, pressing upon the base of the hammer arm which
forms an eccentric; it having a hole through near the said end of the hammer arm,
& a hole through across the wedge block, through which a pin is fixed for the
hammer to work upon, which strikes upon a block with a hole sunk in it to allow an
alarm cap to be pressed in it, which by its being so confined gives a loud report. The
hammer block is hollow for the purpose of holding a quantity of the alarm caps which
are kept in by a cork. The lever or distance piece works in a slott in the hammer arm,
by means of a hole through them both, & a pin through it for the lever to work on,
a flat spring with one end fastened on to the under part of the hammer arm allowing
the other end to lay over the bottom of the slott, pressing against the flats at the end
of the lever, which comes through when open or shut up. It opens to form a right
angle with the hammer arm, & extends beyond the thinnest end of the wedge block,
when the hammer arm is pulled right back, the least touch being sufficient to release
the hammer which gives the alarm, before the door or window reaches the wedge
part of the block.
The reason of my having this my invention so constructed is that upon it being
placed in position on the floor, or the front side of the top half of a window frame
inside any apartment, immediately the door or lower half of the window touches the
lever. The hammer flies down striking a sharp blow upon the alarm cap, making a
tremendious noise. The wedge block through having teeth at its base making it
impossible to enter the apartment until it is removed from the inside.
Dated th: 10th Jan of Tune 1000
GEORGE JOHN BELLINGHAM.
COMPLETE SPECIFICATION.
Improvements in Portable Burglar Alarm Fastenings for Doors
and Windows.
GEORGE JOHN BELLINGHAM 21 Warner Street Barnsbury London N. Mechanical
Engineer 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 :-
A hollow wedge shape block A having sharp pointed teeth 6 along each side of its
base, to prevent it from slipping when the door or window against which it is placed
is being forced. It has sharp pointed pins c projecting above the points of the teeth
for fixing it any required distance from the door or lower half of a window. The
inside fittings consist of a hammer d block E, lever, or distance piece, F and two flat
springs; arranged in such a manner, that when the alarm is fired both hammer
& lever, lay down quite clear of the top & bottom of the wedge block, shutting down

page_text: towards the thickest end; & it is worked in the following mannor: a flat spring H
along the centre, fastened at one end to a piece I projecting from the hammer block,
at such an angle that gives the other end, a upward tension, pressing upon the base J
of the hammer arm which forms an eccentric; by having a hole through near the said
end of the hammer arm, & a pin through the sides of the wedge block, for the
hammer to work upon which when moved, by a door or bottom window sash coming
in contact with the end of the lever F, strikes a sharp blow upon the block E, having
a recess sunk in it to allow an alarm cap being pressed in which, by its being so
confined, gives a loud report when fired off. The jar occasioned by the hammer
striking the block is sufficient to cause the lever F to fold down. The hammer block E
is recessed also from underneath, for holding a quantity of alarm caps in reserve.
The
lever F works in a slott K through the hammer arm on a pin across & it can be
folded down only towards the thickest end of the wedge block, it has a flat spring G
with one end fastened the other laying over the underpart of the slott pressing upon
the end of the lever projecting through, when the hammer is pulled back, the lever
being open extends beyond the thinnest end of the wedge block; the least touch being
sufficient to release the hammer; thus giving the alarm before the wedge block com-
mences to be jammed between the floor & the bottom of the door, or between the two
window sashes, which when the invention is used for windows the sharp pointed pins C
are pressed into the top sash, the lever F pointing downward is moved by the action of
the bottom sash coming in contact with it.
The reason of my having this my invention so constructed is that upon its being
placed in position at a door or window, immediately either are attempted to be opened
the hammer flies down making loud report by firing off a cap, the wedge block through
having teeth & pins at its base prevents anyone from entering until it is removed.
Having now particularly described & ascertained the nature of my said
invention, & in what manner the same is to be performed, I declare that what
I claim is
1st. An improved portable appliance, through having sharp pointed teeth, & pins
at its base, allows it to be fixed any required distance from a door or lower half of a
window, preventing anyone from entering an apartment against the wish of the
occupier.
2nd. An improved portable appliance, having a recess sunk in its hammer block for
making a loud report when a cap is fired off.
3rd. An improved portable appliance, having a lever so constructed that the jar
occasioned by the firing off the alarm will fold it down out of the way.
Dated this 4th day of September 1889.
GEORGE JOHN BELLINGHAM.