Improvements in Window Sash Fasteners.
Year: 1890

page_text: Date of Application, 27th Nov., 1890
Complete Specification Left. 24th Sept., 1891-Accepted, 27th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Window Sash Fasteners.
ARTHUR EDWARD WHITEHEAD and. JOHN ARTHUR BROOKFIELD both of
25 Change Alley Sheffield Iron Merchants do hereby declare the nature of this
invention to be as follows:-
The object of this invention is to provide a secure and safe fastener for window
sashes, so as the same cannot be undone from the outside of the window as is the
case with the ordinary window-catches now used.
The invention consists in providing the catch bar with a suitable joint at one end,
so as it will fold over the guide piece and lock itself or down over, the window sash
bar or meeting rail. We may if desired modify the invention by dispensing with
the hinge or joint and provide the handle of the catch bar with a loose spindle
which engages when desired with a recess cut in the plate carrying the catch piece
guide. If desired we may provide a fixed spindle or a projecting piece on the
bottom or underside of the handle or knob, but in such case we prefer to bevel the
plate or groove same so as to guide the said projecting piece into the recess which
secures it likewise the sashes.
In employing the hinged piece we do not confine ourselves to any particular
method of securing the hinged portion when folded over; any suitable method .may
be used in conjunction herewith.
Dated this 27th day of November 1890.
E. EATON,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Window Sash Fasteners.
ARTHUR EDWARD WHITEHEAD, and JOHN ARTHUR BROOKFIELD, both of
25 Change Alley, Sheffield, Iron Merchants do hereby declare 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 :-
The object of this invention is to construct a window sash-fastener that cannot
be opened from the outside, by the insertion of a knife blade or the like; sash
fasteners of ordinary construction being liable to this method of violation.
In the annexed sheet of drawings I have shown the method of construction we
prefer which is exceedingly simple and efficient.
Fig. 1, is a plan of the complete fastener with the catch bar midway between
open and shut."
Fig. 2, elevation of catch bar, locked.
Fig. 3, section of catch bar locked in position.
Fig. 4, section of catch bar, released.
Similar letters of reference indicate similar parts in any of the figures.
The fastener consists as usual of two plates A. and B, a catch bar C, and a guide
and tightener D. As will be readily understood the part A, is to be fixed upon the
upper sash, and the part B, on the lower sash.
The catch bar C, may be provided with a spring to force the catch bar into
either the open or closed position, but the spring may be dispensed with if
desired.
Through the centre of the handle or knob E of the catch bar we fix a vertically
moving pin F, that can be raised by the fingers, by means of its head F', and that

page_text: will fall into its normal position, by gravity, or it may be assisted by a spring if
preferred.
At each end of the are described by the catch.bar is a hole or recess in the plates,
marked G, and H, into which the end of the pin F, falls when brought directly
over it; thus when the catch bar is moved back to open the window the pin will
drop into G, and when moved forward to fasten the window it will drop into H,
and in either case, the pin must be raised before the catch bar can be moved.
If preferred, and if a closing spring is used to the catch bar, the hole G may be
dispensed with.
We may instead of a fixed knob E, have a hinged fall down piece at the end of
the catch bar to lock itself over the window sash bar, but we prefer the method
above particularly described.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same may be carried into effect, we declare that
what we claim is:
-
1-In a sash fastener, the method of locking the catch bar in either the open or
closed position, by means of a drop pin in the handle or knob of the catch bar, and
corresponding holes or recesses in the plates to receive the end of the pin, substan-
tially as hereinbefore described, and illustrated in the drawings.
2-In a sash fastener, the method of locking the catch bar when closed by
making a hinged piece on the end of the catch bar, that will turn down over the
window sash bar, and thus prevent a lateral movement.
...Dated the 21st, day of September 1891.
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent. for Applicants.