Improvements in or connected with Means or Devices for Fixing the Limit to which Sliding Window Sashes can be Opened.
Year: 1892

page_text: Date of Application, 2nd Apr., 1892
Complete Specification Left, 2nd Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Means or Devices for Fixing
the Limit to which Sliding Window Sashes can be Opened.
I, JOSEPH TAYLOR MARTIN, of Grove Road, Wallasey, in the County of
Chester, Merchant, do hereby declare the nature of this invention to be as
follows :-
This invention relates to apparatus to be employed to prevent the sliding
sashes of windows being opened beyond a certain limit for wrong purposes.
According to this invention there is provided a weighted catch so pivoted by a
pin and slot to a holding plate that it is free to rock or be rocked. In its normal
position the catch projects outside the edge of the plate, but when the catch is
raised (which it may be by a cord or other means) it lies flush with the edge of
the plate. This catch is secured to a vertical bar of the frame of the upper sash
at the point which is to determine the limit to which the window may be opened.
On the horizontal upper bar of the lower sash there is provided a stop or catch
piece which comes in contact or engages with the projecting catch on the upper
sash when the window is opened to the given limit, by raising the lower sash or
by lowering the upper sash.
When it is desired to open the window sashes to the full extent the rocking
catch is raised by the cord and falls flush with the edge of its plate and sash bar.
In this position the stop or catch on the bar of the lower sash will pass the rocking
catch and the window can be opened to the full extent. The outer edge of the
rocking catch is bevelled to allow the stop to pass so that the sashes can be closed
without pulling the cord.
Amongst other advantages, the apparatus according to my invention provides a
means for preventing sliding windows from being opened except to a certain limit
top or bottom, sufficient for ventilating purposes, but insufficient for admittance for
burglarious or like purposes.
Dated thin 1
LA
*1.1000
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Means or Devices for Fixing
the Limit to which Sliding Window Sashes can be Opened.
I, JOSEPH TAYLOR MARTIN, of Grove Road, Wallasey, in the County of
Chester, Merchant, 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 :—
This invention relates to apparatus to be employed to prevent the sliding
sashes of windows being opened beyond a certain limit for wrong purposes.
In its
According to this invention there provided a weighted catch so pivoted by
a pin and slot to a holding plate that it is free to rock or be rocked.
normal position the catch projects outside the edge of the plate, but when the
catch is raised (which it may be by a cord or other means) it lies flush with
the edge of the plate. This catch is secured to a vertical bar of the frame of the
upper sash at the point which is to determine the limit to which the window may
be opened. On the horizontal upper bar of the lower sash there is provided
[Price Rd 1

page_text: a stop or catch piece which comes in contact or engages with the projecting
catch on the upper sash when the window is opened to the given limit by raising
the lower sash or by lowering the upper sash.
When it is desired to open the window sashes to the full extent the rocking
catch is raised by the cord and falls flush with the edge of the plate and sash
bar. In this position the stop or catch on the bar of the lower sash will pass
the rocking catch and the window can be opened to the full extent. The rocking
catch allows the stop to pass so that the sashes can be closed without pulling the
cord.
'
Having thus generally described the object, nature, and effects of my invention,
I will now proceed to describe it with reference to the sheet of accompanying
drawings. In the various figures the same parts are designated by the same
letters, and they correspond with those used in the following explanation of the
example.
Figure 1 of the drawings is a side elevation shewing a portion of an upper and
lower window sash provided with means according to my invention for fixing the
limit of opening, the window being shewn open.
Figure 2 is a front view of the parts shewn in Figure 1.
Figure 3 shews in side elevation and on a larger scale the window sashes in
a closed position and the catch device raised so as to permit of the window being
opened to its full, or any desired extent, the normal position of the catch device
being shewn in dotted lines.
With reference to the drawings, a designates the lower and 6 the upper sash of
a window; c is the weighted catch which is pivoted by the pin d to the holding
plate e fixed to the upper sash at any suitable point to limit the opening of the
window, the pin d passing through the slot h in the catch c, the slot h allowing an
up and down and a rocking movement to the catch c. The catch c is weighted
at c¹ so as to cause its normal position to be that shewn in dotted lines Figure 3.
The catch has a projecting lipi which acts as a stop to the catch piece k which
is fixed on the upper bar of the lower sash in the same vertical line as the lip i of
the catch c so that when the lower sash a is raised or the upper sash b is lowered,
the parts and come in contact as shewn in Figures 1 and 2, thus limiting the
amount of opening. The normal position of the catch c and the lip i being that
shewn in dotted lines in Figure 3.
To open the window beyond the limit allowed by the catch e, the catch c is
moved back so that the catch k will pass the lip i. This is most conveniently done
by means of the cord g which is fastened to the top of the catch c and led over a
pulley the end of the cord being brought down within reach. By pulling the cord
the catch c is raised and the lip i is brought out of the line of travel of the catch_k,
and the window can be opened to any desired extent. In closing the window, the
catch c swings back out of the way of the catch k as the catch k passes it.
Amongst other advantages, the apparatus according to my invention provides a
means for preventing sliding windows from being opened except to a certain limit
top or bottom sufficient for ventilating purposes, but insufficient for admittance for
burglarious or like purposes.
I would have it understood that the device according to this invention may also
be used as a catch for locking sliding window sashes when closed, as well as for
limiting the opening thereof, the position at which the catch c is fixed governing
the amount of opening, if any, allowed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a device for limiting the opening or locking of window sashes, a rocking
catch attached to the upper sash or window and adapted in its normal position to
automatically stand or project in the path of the lower sash or window and to act
as a catch or stop or lock; substantially as set forth.

page_text: 2. The automatic device for limiting the opening or locking of window sashes,
having its parts arranged and adapted to operate as set forth with reference to the
drawings.
Dated this 30th day of December 1892.
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.