Improvements in Combined Burglar Alarms and Sash Looks.
Year: 1889

page_text: Date of Application, 6th May, 1889-Accepted, 15th June, 1889
COMPLETE SPECIFICATION.
Improvements in Combined Burglar Alarms and Sash Looks.
I, ARCHIE BENJAMIN CAUDLE, of the town of Monroe, in the County of Union, and
State of North Carolina, United States of America, Artist in Photography do hereby
doclare 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:
This invention relates to a device for locking a window sash, which also serves,
when an attempt is made to raise the window to give an alarm to the inmates of the
house.
The invention has for its object to provide a simple and effective device for this
purpose constructed and arranged as hereinafter described and claimed.
Reference is to be had to the accompanying drawings, forming a part of. this
specification in which similar figures of reference indicate corresponding parts in all
the views.
5:
Fig 1 represents a portion of a window sash and frame showing the device in
position.
Fig 2 is a detail view of the alarm mechanism and Fig. 3 is a sectional detail
view of the locking device.
In the construction of this invention the window sash is provided with a catch
which engages a projection secured to and adapted to slide upon the window-frame and
having connected therewith an automatic device for operating an alarm.
In carrying out my invention, a plate 1, of metal or other suitable material, is
fastened to a window-frame 2, by means of screws 3, or in any other suitable way. The
plate 1, is formed with a slot 4, having beveled sides 5, with which a correspondingly-
shaped rib or tongue 6, secured to a sliding block 7, by screws 38 engages
The rib
or tongue 6 equals in length a portion of the slot 4 so as to permit the block 7 to be
moved a limited distance on the plate 1. The block 7 is provided at one side with a
slot 8 which is protected by a slotted plate 9 fastened to the block 7.
At the upper end of the slot 8 is located the end of a wire 10, with which the
shoulder 11; of a curved catch 12, pivoted to the plate 9 is in contact. The curved
ends 13, 14, of the catch 12, are acted upon by an arm 15, fastened to the plate 1,
having its end 16, bent over the plate 9, in the line of movement of the arms 13, 14
of the catch 12. The wire 10, 15 pivoted to a stud 17, on the plate 1, by being bent
around the same, and has at its upper end a hammer 18, which is adapted to strike against
the bell 19 mounted on the plate 1. It will be seen that the wire 10 is bent to form
a bell crank lever consisting of arms 20, 21, the arm 20 having connected thereto a
The latter
retracting spring 22, fastened at its other end to a stud 23 on the plate 1
is hollowed out as at 24, to permit of the movement of the connection of the spring 22
with the arm 20 A stud or pin 25 on the plate 1, limits the action of the spring 22
on the arm 20.
Upon the block 7 are pivoted two curved arms 26, having their pivoted ends formed
with racks 27, whereby they operate in unison. The pivoted arms 26 are adapted to be
thrown toward each other by means of a spring 28 fastened to the block 7, and are
limited in their movement by means of a stop 32 on the block 7. The ends of the
curved arms 26 engage a catch 29, consisting of a strip of metal having bent ends 30
secured to a window sash 31. The curved arms 26 are thrown into engagement with
the bent end: 30 of the catch 29 by means of the spring 28.
The operation of my device is as follows
The curved arms 26 being in engagement with the bent ends 30 of the catch 29 if
an attempt is made to raise the sash 31. the catch 29 and arms 26 engaging therewith,
will move with the window sash and carry the block 7 upward until the upper end of

page_text: the rib 6, sliding in the groove 4, strikes the upper end of the groove 4. The
block 7 sliding upward carries with it the catch 12, having its shoulder 11,
engaging the wire 10 and the latter is raised until the block 7 has reached
the limit of its upward movement when the curved portion 1+ of the catch 12, having
moved under the bent end 16 of the arm 15 finally releases the shoulder 11 from the
wire 10, and the spring 22, thereupon throws the hammer 18 against the bell 19 to
sound the alarm. Upon sliding the block 7, down again to its normal position the
end 13 of the catch 12 is brought under the bent end 16 of the arm 15 to throw the
shoulder 11 again into engagement with the wire 10.
By means of the construction heretofore described it will be seen that the device
not only serves to give an aların when the sash is partly raised, but also acts as a lock.
If ventilation is desired, the sash may be raised a little way without tripping the alarm
mechanism. The window sash may also be raised entirely up by throwing the
arms 26 out of engagement with the catch 29. The upper sash may be fastened
in any suitable way, or the device herein described may be attached thereto with
tripping mechanism reversed.
While I have described a specific construction of parts I do not intend to limit
myself thereto, as I regard my invention as covering any construction whereby a
catch on the sash will serve in connection with a sliding projection on the window-
frame and an alarm-tripping mechanism to act as a lock and an automatic alarm.
The advantages of my device are that it is simple in construction and easily
operated, it provides a lock for the sash which operates the alarm, the sash may
be partly raised for ventilation, there is no danger of its getting out of order, and
the alarm may automatically reset itself.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be perfornied I declare that what
I claim is
1 In a burglar-alarm, the combination with the attaching plate, the alarm and
its operating or sounding arm or lever, of a movable block on the attaching plate
a catch carried by said block and engaging said arm or lever when retracted, and
a relatively stationary tripping projection or arm in the path of the said catch to
move it and release the alarm-operating arm or lever after it has been projected or
thrown by said block and catch, substantially as set forth.
2. In a burglar alarm, the combination with the attaching-plate, the alarm, and
the spring actuated arm or lever for operating or sounding the same of a block
movable upon the attaching plate and provided with a pivoted catch engaging said
spring operated arm or lever to move it against the action of its spring, and a stationary
tripping projection or arm in the path of the said catch to throw the same and release
said pivoted arm or lever, and a stop linting the return movement of the arm or
lever, substantially as set forth.
3. The combination, with the attaching plate and the alarm sounding or operating
arm or lever, of the vertically movable block, a catch pivoted between its ends to the
block, and having its ends projecting outward, the inner face of the catch having
a shoulder to engage the arm or lever in its normal position and project it against
the action of the spring when the block is moved, and a projection or arm secured
to the attaching-plate and extending tiansversely across the said pivoted bodily
movable catch between its ends and in the paths thereof whereby when the block
moves the catch in one direction one end of the catch will strike the said projection
and throw the shouldered end outward and when moved in the opposite direction the
other end of the catch will be struck and its notched end thrown to again engage
the alarm operating or sounding arm or lever, substantially as set forth.
4 The combination, in a burglar alarm for windows, with an alarm having an
operating or sounding arm or lever and a movable block for operating said arm
or lever, of a sash-fastener secured to the block to engage a sash and operate
the block when a sash is opened, substantially as set forth
5. In a burglar-alarm for windows, the combination with an alarm, having an

page_text: operating or sounding arm or lever and a movable block for operating said arm or
lever, of two oppositely inclined sash-fastener arms pivoted upon said block and
connected at their inner ends for simultaneous movement, substantially as set forth.
6. In a burglar-alarm for windows, the combination with the alarm having a
a catch pivoted
spring-actuated operating lever or arm, of the sliding block having
upon it to move independently and to engage the said lever or arm and project it against
the action of its spring, a stationary projection or arm projecting across the said catch
in the paths of the ends to throw it into and out of engagement with the alarm
sounding or operating arm or lever and the two sash-fastening arms secured to the
block to engage the sash at higher and lower points, whereby when the sash is
opened the alarm operating or sounding lever will be projected and released,
and when the movement of the sash is reversed the catch will be thrown into
engagement with said lever or arm substantially as set forth.
7. A combined burglar-alarm and sash fastener comprising the base plate 3,
gong 19. the operating or hammer lever 20, 21, its spring 22, and stop 10, the
Block 7, having a limited vertical movement on plate 3, the plate 9 on the inner
vertical edge of block 7, and slotted to receive the end of hammer lover, the catch 12,
pivoted to plate 9 having projecting ends 13, 14, and shoulder 11, engaging the
hammer lever the plate 15, secured to plate 3, and having a projection or arm 16
extending across the catch 12, to be struck by the projecting ends thereof the two
sash fastening arms 26, pivoted at their inner toothed engaging ends to the block 7,
the spring throwing said arms outward and the stop-plate 29 having end projections 30
for the ends of the arms 26, substantially as set forth.
Ja4a
TES
ven day
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.