Improvement in Metallic Window-Blinds. Page: 2 of 2
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UNITED STATES PATENT OFFICE.
WILLIAM S. MACKRELL, OF BRENHAM, TEXAS, ASSIGNOR TO HIMSELF,
WILLIAM B. WILLSON, AND CURTIS T. ROFF, OF SAME PLACE.
IMPROVEMENT IN METALLIC WINDOW-BLINDS.
Specification forming part of Letters Patent No. 166,535, dated August 10, 1875; application iled
June 1, 1875.
To all whom it may concern: bar D, and thus secure the shutter at any de-
Be it known that I, WILLIAM S. MACKREELL, sired opening, as well as when the shutter is
of Brenham, in the county of Washington and closed, to be turned down completely, so that,
State of Texas, have invented certain new and as one of the notches c' seats itself in the
useful Improvements in Fire-Proof Window- I cross-bar D, it may form a safe and secure lock
Blinds; and I do hereby declare the follow- for the blind, which can only be opened by an
ing to be a full, clear, and exact description approach from the interior.
of the invention, such as will enable others There may be any number of these little
skilled in the art to which it pertains to make notches d', to correspond with the necessity or
and use it, reference being had to the accom- desire of the case; but the last notch nearest
paying drawings, which form part of this the section A, to which the arm is attached,
specification. should be so situated that when it connects
My invention relates to an improvement in with the cross-bar it will cause the shutter to
fire-proof window blinds or shutters; and con- be closely engaged with the window-casing.
sists in the appliances and devices hereinafter I E are any suitable cleats on the sides of the
specified and claimed. window, to which the cross-bars D are at-
It is well known that extensive conflagra- tached.
tions frequently occur by means of the lute- The operation of my invention is readily
rior casings of the windows of adjacent build- seen.
ings being inflamed from a neighboring build- The shutter is more easily closed and opened
ing. than if the sections or leaves were hung ver-
I have discovered a blind which acts both tically, since oftentimes the wind or other ele-
as a barrier to the progress of flames attack- ments interfere with their proper operation,
ing windows and as a convenient shutter for while by my invention a person from the in-
the common purposes, and is adapted to be terior,withoutexposinghimself totheweather,
adjusted and securely locked in an open or may promptly close the shutter; also, blasts
closed position, as hereinafter more fully set and gusts of wind do not cause an obstruction
forth and claimed, to the closing.
The material of my invention may be of any By means of the arm C any desired opening
suitable substanceto resist the action of flames; may be effected and securely maintained.
but I prefer wrought-iron or cast-iron. What I claim as new, and desire to secure
In the drawings, Figure 1 represents my by Letters Patent, is-
shutter as open; Fig. 2, when closed. The fire-proof window-blind consisting of
A are sections, which are hung vertically horizontal leaves or sections A, vertical cleats
instead of longitudinally, as is the old prac- B, and locking-arm C, all arranged substan-
tice, and are fastened by cross-bars a extend- tially as and for the purpose described.
ing across the window. .B are two vertical In testimony that I claim the foregoing I
cleats attached in any suitable manner to the have hereunto set my hand this 7th day of
sections A. C is an arm or bar provided with May, 1875.
an elbow-joint, c, placed at any suitable dis- WILLIAM S. MACKRELL.
tance thereon, by means of which the bar may
be flexed at an angle, so as to cause any one Witnesses:
of the little notches o', with which said bar is JOHN DOOLAN,
provided, to be readily engaged with the cross- T. J. NEwmnaN.
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Mackrell, William S. Improvement in Metallic Window-Blinds., patent, August 10, 1875; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166463/m1/2/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.