Safety Window-Screen. Page: 2 of 3
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UNITED STATESPATENT OFFICE.
MATTHEW G. CROSBY, OF PALESTINE, TEXAS.
SAFETY WINDOW-SCREEN.Mo. 851,498.
Specification of Letters Patent.
Application filed September 17, 1906. Serial No. 334,8270To all whom it mai/ cou"cerm:
Be it known that I, 1M u riTrw G. CosBY,
a citizen of the United States of America, re-
siding at Palestine, in the county of Ander-
5 son and State of Texas, have invented new
and useful Improvements in Safety Window-
Screens, of which the following is a specifica-
tion.
This invention relates to a safety window
0 screen, its object being to provide a screen
which is adjustable for different sized win-
(lows and is provided with means for fasten-
ing the same to the. window frame and lock-
ing the sections thereof in adjusted position,
15 so as to effectually prevent the entrance of
unauthorized persons into the house when a
sash is opened for ventilation.
In the accompanying drawings,--Figure 1
is an inner elevation of the lower portion of a
20 window frame, showing the application of
the invention. Fig. 2is an inner elevation
of the folded screen, a portion being broken
away to show one of the locking devices.
Fig. 3 is a vertical front to rear section
25 through the screen on line 3-3 of Fig. 2. Fig.
4 is a horizontal section thereof on line 4-4
of Fig. 2. Fig. 5 is a detail of one of the lock-
ing devices.
The screen is of the adjustable type, and
30 consists of grated sections 1 and 2, each sec-
tion comprising a pair of side rails 3, top andi
bottom rails 4 and 5 and spaced bars or grate
rods 6 connecting the side rails between said
top and bottom rails, the parts being prefer-
35 ably constructed of metal of the requisite
strength. Each section is provided upon
the outer rail thereof with spurs 7 adapted to
be embedded in the jambs of the window
frame when the screen sections are extended
40 to hold the screen securely in applied posi-
tion against vertical and inward and outward
movement through the opening in the win-
dow frame. The side rails of the section 2
are arranged to slide upon the grate bars of
45 the section 1, thus permitting said sections,
to have relative inward and outward move-
ment to adjust the screen for application to
windows varying in width.
Means are provided upon the top and bot-
50 tom rails of the two screen sections to lock
said sections in relatively adjusted position,
such locking means being duplicates in con-
struction, so that a description of one will,
except as to the arrangement of the same,
55 will suffice for both. The upper rail 4 of the
section 2 is provided with a longitudinal rowratenteci April 23, 1907.
of rack teeth 8, while the adjacent rail 5 of
the section 1 carries a locking pawl or dog 9 to
engage said rack teeth. The rail 5 is of ciin-
ineled form which incloses and slidambly en- 6o
gages the teeth S and forms a casing or hous-
ing for the pawl 9. The said pawl is pivot-
ally mounted within the housing, and its
toothed portion is properly inclined to en-
gage the rack teeth, which latter are inclined 65
properly to ride over the teeth and permit
outward adjustment of the section 2 upon the
section 1 and to engage said teeth and lock
said section 2 against inward movement.
A locking device is provided to hold the 70
pawl in locking position. the same compris-
ing a rotary head 10 journaled in an opening
in the inner wall or plate of the rail 5 and
provided with recesses 11 to receive bits or
projections upon a suitable form of key. 75
The head 10 carries a tumbler 12 from which
projects a locking lug or tongue 13 adapted
to enter a recess 14 in the upper edge of the
pawl to hold the same in engagement with
the ratchet teeth. From the tumbler ex- 8o
tends i journal 15 mounted in a suitable
hearing opening in the outer wall or plate of
the rail 5, thus revolubly mounting the lock-
ing device so that it may be turned by the
key to throw the lug 13 into and out of en- 85
gagement with the pawl. The pawl is pro-
vided at its free end with a shoulder 16 adapt-
ed to be engaged by a bit 17 oni a rotary re-
tracting device 18 journaled in the rail 5 and
provided upon the inner side of the latter 90
with an operating knob or finger piece 19.
B~y this construction it will be seen that
when the pawl is in locking position the
screen sections will be held extended, thus
preventing any person from the exterior 95
opening or removing the screen to gain ac-
cess to the house through the window.
Upon singing the lockin(g device out of en-
gagement with the pawl the latter may be
lifted and retracted by the bit 17 upon turn- oo
ing the finger piece 19, thus releasing the sec-
tions from locking engagement so that the
spring can be folded or collapsed for removal
or other purposes.
I have not deemed it necessary to show the ro5
internal construction of the locking means
upon the bottom rails of the screen section,
it being only necessary to state that the rack
8 in this instance is formed upon the lower
rail of the section 1, while the locking dog in
and cooperating parts are formed upon the
channeled bottom rail of the section 2. It
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Crosby, Matthew G. Safety Window-Screen., patent, April 23, 1907; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512181/m1/2/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.