Burglar-Alarm. Page: 2 of 3
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UNITED STATESPATENT OFFICE.
EDWARD OGLE, OF DALLAS, TEXAS.
BURGLAR-ALARM.Specification of Letters Patent. Patented Nov.11, 1913.
Application filed April 18, 1912. Serial No. 691,687.To all whom it may concern:
Be it known that I, EDWARD OGLE, citizen
of the United States, residing at Dallas, in
the county of Dallas and State of Texas,
5 have invented certain new and useful Im-
provements in Burglar-Alarms, of which
the following is a specification.
My invention relates to new and useful
improvements in burglar alarms, and relates
10 more particularly to that class of burglar
alarms which are adapted to protect the
windows of a building against intruders, the
alarm being automatically operated when
the window is raised.
15 The object of the invention is to provide
a burglar alarm of the class above-specified,
that will begin to operate as soon as either
window sash is slightly opened, and which
will continue to produce an alarm as long
20 as the window remains open.
The object, more specifically stated, is to
mount a pair of elongated strips of metal in
one of the channels which receive the lat-
eral edges of a window sash, and to mount
25 upon the sash a resilient member that will
bear upon said strips as soon as the sash
is shifted from its closed position, thereby
closing an electric circuit containing an alarm
bell in which circuit said strips are included.
so Finally, the object is to provide a device
of the character described that will be
strong, durable, simple and efficient, and
one, the various parts of which will not be
likely to get out of working order.
35 With these and various other objects in
view, my invention has relation to certain
novel features of the construction and opera-
tion, an example of which is described in the
following specification, and illustrated in
40 the accompanying drawing, wherein:
Figure 1 is a view in front elevation of the
lateral portion of a window, certain portions
of the frame and of the lower sash being
broken away to show devices mounted upon
45 the sashes for the purpose of closing the
aforesaid electric circuit. Fig. 2 is a trans-
verse, vertical, sectional view of the window,
with the sashes removed therefrom, the sec-
tion being taken upon the line A-A of Fig.
50 1, a diagram of the electrical connections
being also included in this view. Fig. 3
is another transverse, vertical, sectional
view, the section being taken this time upon
the line B-B of Fig. 1, and the sashes being
55 shown, with the circuit-closing devices which
they carry. Fig. 4 is a detail, perspectiveview of one of said circuit-closing devices.
Fig. 5 is a detail, sectional view of the other
circuit - closing device, the section being
taken upon the line C-C of Fig. 1. Fig. 6 60
is a detail, perspective view, showing a
modified form of the device illustrated in
Fig. 4. Fig. 7 is a duplication on a large
scale of a portion of the structure shown
in Fig. 1, the parts shown being a block 65
formed on the upper portion of one of the
sashes to receive one of the devices which
are shown in Figs. 4 and 6.
Referring now more particularly to the
drawing, wherein like reference characters 70
designate similar parts in all the figures, the
numeral 1 denotes a wall in which is framed
a window equipped with the herein - de-
scribed novel burglar alarm. The upper and
lower horizontal sill members of said win- 76
dow are respectively denoted by the numer-
als 2 and 3, and the side jamb (one only be-
ing shown in the drawing), being designated
by the numeral 4. At the top of the window
a pair of horizontal face-boards 5 are mount- 80
ed, one within and one outside of the win-
dow, their lower edges being substantially
flush with the under surface of the upper
sill 2. A similar pair of vertical face-boards
6 are mounted upon the side jamb 4, one in- g5
side and one outside of the window, the in-
side board being made to project into the
window aperture slightly beyond the side
jamb 4 so as to form a guide for one of the
sashes. The upper and lower sashes which 90
are respectively denoted by the numerals 7
and 8, are adapted to slide vertically in
channels separated by a parting strip 9
mounted upon the side jamb 4. The parting
strip 9 in conjunction with the front or in- 95
side face-board 6 forms a channel for the
lower sash 8, and said parting strip in con-
junction with a vertical strip 10 mounted
upon the side jamb 4 forms a guide for the
upper sash 7. 100
In the channel formed by the strips 9 and
10 a pair of elongated metal strips 11 are
mounted upon the opposite faces of the
strips 9 and 10, as shown in Fig. 2 of the
drawing. At the top of that edge of the 105
sash 7 which is adjacent to the strip 11, an
arch-shaped member 12 is mounted strad-
dling a block 13, the down-turned extremi-
ties of said member being adapted to contact
with the strips 11, after the sash has been 110
slightly lowered from its closed position.
The free ends of the legs of the member 121,078,550.
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Ogle, Edward. Burglar-Alarm., patent, November 11, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth860083/m1/2/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.