Improved Window-sash Stop.
Year: 1890

page_text: Date of Application, 13th Feb., 1890
Complete Specification Left. 13th Nov., 1890-Accepted, 13th Feb., 1891
PROVISIONAL SPECIFICATION.
Improved Window-sash Stop.
JOHN POLLOCK Papermaker's Agent 11 Queen Victoria Street London do
hereby declare the nature of this invention to be as follows:-
The above prevents the sashes from being raised or lowered beyond certain limits
which is regulated by a split pin.
•
It is a window stop and consists of two pieces the one being a boss or plug which
is fitted into side of upper sash about 3 inches above the lower one and has a hole
in it the other being a split pin which fits into the hole of boss tight and projects
over the under sash preventing either sash going beyond it.
13th February 1890.
JOHN POLLOCK.
COMPLETE SPECIFICATION.
Improved Window-sash Stop.
JOHN POLLOCK, Papermaker's Agent 11, Queen Victoria Street, London, 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 a removeable stop adapted for application to the sash of
a window to regulate the extent of movement thereof and to prevent the sash or
sashes from being raised or lowered beyond certain limited distances determined by
the position of the stop or stops.
The improved stop consists of two principal parts, and means of attachment for
the removeable part is preferably provided suitable for connecting it to some
stationary portion of the framing to prevent its being mislaid and yet keep it when
ont of use in a position readily handy for application. The parts may be of metal
or other suitable material.
ont of use in a position ready mandy for application. The parts may be of metal
or other suitable material.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a sectional view and Figure 2 an exterior view taken at right
angles to Figure 1 of part of a window with sliding sashes in the upper one of
which the stop is shewn applied.
Figure 3 shews the stop apart from the sash with the one part or plug in the
other part or socket.
Figure 4 shews the plug separately.
Figure 5 shews the socket separately.
a is the upper sash, the lower sash, c a fixed part of the framing, d is the plug
or bolt which is preferably made to fit with a spring holding in its socket or
thimble e by forming it tubular say from 1 to 2 with slots cut in two or other
number of places from the bottom edge 2 to say about 3, the thimble or socket e
is preferably formed with two or other number of small wings or projecting stay
pieces adapted to aid in securely holding the socket in the woodwork of the
upper sash.
This socket or thimble may conveniently be applied by boring with a centrebit
or other tool the approximate size of the socket and then driving the socket into
its place flush with the surface of the sash.
In use the plug when inserted in its socket will serve to control extent of opening
of the window say to a few inches for ventilation whilst when the plug is removed

page_text: and allowed to hang against the frame the socket which remains in the upper sash
being let in flush with the sash forms no obstacle to the sashes being slidden past
each other in the ordinary manner such as for cleaning the glasses.
A stop may be employed at each side of a window sash and more than one socket
may be provided to one plug, the sockets being fixed at different adjusted
distances.
The part of the lower sash against which the outer end of the plug or plugs abut
or strike when moved to the fullest extent permitted by the stop may be protected
by a metal plate but such will not generally be requisite.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to. be performed, declare that what I
claim is
1. The improved window sash stop consisting of a socket applied in a window
sash and a stop piece or plug adapted to be held therein as and for the purposes
hereinbefore set forth.
2. In a window sash stop, a sunk socket e, co-operating with a spring plug or
stop piece d so as to form a removable regulator for the distance of opening of the
sash or sashes, substantially as set forth.
Dated the 13th day of November 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.