Improvements in Alarm Locks.
Year: 1899

page_text: Improvements in Alarm Locks.
I, WILLIAM CLARK LEET, of 60, N. Main Street, Town of Washington, County
of Washington, State of Pennsylvania, U.S.A., Physician, do hereby declare
the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to an improved alarm-lock, and has for its object to
provide a lock for temporary use designed to be easily and quickly applied and
to combine therewith an alarm adapted to be sounded upon a slight movement of
the door.
Figure 1 of the accompanying drawings is a perspective view of the device in
use.
Fig. 3 is an enlarged perspective of the device, and Figs. 3, 4, and 5 are
perspective views of details.
In the drawing, 1 is a lock-plate having at its inner edge spurs 2 for driving
into the face of the door-casing 3. Holes 4 in the lock-plate receive a staple-
shaped key 5 (shown in Fig. 5) to prevent the opening of the door 6, as illustrated
in Fig. 1.
7 is an alarm-bell secured on a plate 8, the latter having at one end lateral
arms 9. the ends of which are bent downward at a right angle to form lips 10.
Either lip is adapted to fit into a socket 11, formed by an extension 12 of the
lock plate, thus holding the bell in proper relation to the lock-plate. The bell
shown is of an ordinary automatic type, the sounding being effected through a
push-pin 13.
In operation, the lock-plate being secured between the door and casing by
spurs 2, taking into the casing, the door is closed and key 5 placed in holes 4,
locking the door against being opened. The bell is then placed in position by
forcing either lip 10 into socket 11, the push-pin 13 projecting toward the door
and but a slight distance therefrom. Any slight movement of the door will
contact with pin 13 and sound the alarm.
Should spurs 2 be improperly placed to secure the parts in correct situation,
as may be the case in very thin door-casings, a screw may be used to secure the
lock-plate in place, and for this purpose hole 14 is formed in the lock-plate.
The purpose of forming two lips 10 on opposite sides of plate 8 is to permit the

page_text: bell to be placed in proper position to operate with a door opening either right
or left, as will be apparent.
My device is designed for temporary use, as by guests at hotels or the like, and
it is rendered more valuable through the ease with which it may be assembled
or taken apart, enabling it to be easily carried in the pocket or satchel without
inconvenience. The simplicity of construction practically prevents its becoming
inoperative.
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. A lock-plate removably secured to the door-casing, a key carried by the
lock-plate to prevent opening the door, and an alarm carried by a plate having a
plurality of downwardly-turned lips, either lip being adapted to enter a socket
formed on the lock-plate to vary the situation of the alarm.
2. A lock-plate removably secured to the door-casing, a key adapted to enter
holes in the lock-plate, an alarm-holding plate having oppositely-disposed lips,
a socket on the lock-plate to receive either of said lips, and an alarm carried by
the plate.
Dated this 15th day of August 1899
THOMAS R. SHILLITO,
15, Tooks Court, London, E.C., Agent for the Applicant.