Improvements in Portable Alarm Fastenings for Doors and Windows.
Year: 1888

page_text: Date of Application, 1st Sept., 1888
Complete Specification Left, 25th Oct., 1888
Complete Specification Accepted, 21st Dec., 1888
PROVISIONAL SPECIFICATION.
Improvements in Portable Alarm Fastenings for Doors and
Windows.
GEORGE JOHN BELLINGHAM 21 Warner Street Barusbury London N. Engineer do
hereby declare the nature of this invention to be as follows:-
A Hollow wedge shaped Block having sharp projections at its base for preventing
it being moved when in position, it is fitted internally with a hammer & Lever,
worked by two springs in the following manner, a flat spring along the centre of its
base fastened one end, the other resting upon a cross bar, this springs upward
tension keeps the Hammer arm in its bearings. The trigger action of the Hammer
being occasioned by an eccentric at its base being compressed upon the said spring &
striking upon a block upon which a paper percussion cap is fixed on points round
edge of said block. The adjustinent fever having a pinless hinge is held in position
& worked by a flat spring on arm.
The reason of my having this my Invention so constructed, is that upon it being
put into position, on the floor or window the inside of any door or window the instant
that door or window is attempted to be opened the adjustment lever is moved by the
door or window which causes the hammer to strike a sharp blow upon the Block
and gives an alarm, the wedge shape block proventing the possibility of an entrance
into the apartment untill it is removed.

page_text: COMPLETE SPECIFICATION.
Improvements in Portable Alarm Fastenings for Doors and
Windows.
GEORGE JOHN BELLINGHAM 21 Warner Street Barnsbury N. 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, having sharp projections at its base for preventing it
being moved when in position. It is fitted internally with a hammer and lever,
worked by two springs in the following manner.
A flat circular spring a along the centre of its base one end pressing against the
base of wedge block the other end a¹ fastened up under the thinest end of the wedge
block, this springs upward tension keeps the hammer arm d in its bearings. The
trigger action being occasioned by an eccentric eat its base being compressed upon
the said spring a, and striking upon a block d¹ upon which a paper percussion cap is
fixed on points round the edge of said block 1, this block is hollow e for storing a
quantity of caps in reserve having a stopper at its base. The adjustment lever h
having a pinless hinge will only open to form a right angle with the hammer
arm d, it is hold in position & worked by a flat spring J fastened on the said arm d
when not in position it together with the hammer arm d lays down clear of the
top part of the wedge block b.
The reason of my having this my Invention so constructed is that upon it being
put into position on the floor or window, the inside of any door or window, the
instant that door or window is attempted to be opened, the adjustment lever is moved
by the door or window which causes the hammer to strike a sharp blow upon the
block, and gives an alarm by firing off a paper cap. The wedge shape block
preventing the possibility of an entrance into the apartment untill it is removed.
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:
1st. An improved portable appliance for preventing persons from entering an
apartment against the wish of the occupier.
2nd. An improved portable appliance having such arrangements & fittings as to
give an alarm by the firing off of a cap occasioned by the would be intruder attempting
to open the door or window.
Dated this 24th day of October 1888.
GEORGE JOHN BELLINGHAM.