Improvements in Means or Apparatus for Securing Window Sashes.
Year: 1892

page_text: Date of Application, 4th Oct., 1892
Complete Specification Left, 4th July, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for Securing Window Sashes.
I, JOHN POLLOCK of 29 Queen Street, in the City of London, Paper Merchant
do hereby declare the nature of this invention to be as follows:-
In carrying out my invention I employ a base plate which may be screwed to
the upper sash on its meeting rail and from this plate projects vertically, a stem,
or pin having a screw thread formed around it and upon this stem is mounted
a pedestal bored to clear the said screw thread and to rotate thereon and
externally with a projecting tongue piece or finger. Over the pedestal on the
screwed stem is a screwed and milled travelling and locking nut. Upon the end
of the screwed stem is a button or head adapted to control the extent of relative
movement of the pedestal. In the base plate are holes one at an angle say
of 45° to the others into which a downwardly projecting pin from the underside
of the pedestal can be alternatively engaged.
In operation the travelling nut is raised and the pedestal partially raised and
turned so as to bring the finger, or locking piece over the lower sash meeting
rail and so prevent its rising; or to remove the locking finger.
When the finger is over the lower sash meeting rail and the travelling nut is
screwed down, no force applied by means of a knife or such like means will
turn the finger because of the downwardly projecting pin engaged in the hole in
the base plate, or equivalent engagement and furthermore this locking down of
the finger serves by its pressing on the lower sash meeting rail plate to lock
and secure both sashes against rattling.
Dated the 4th day of October 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the applicant.
COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Securing Window Sashes.
I
1 JOHN POLLOCK of 29 Queen Street in the City of London Paper 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 :-
In carrying out my invention I employ a base plate which may be screwed to the
upper sash on its meeting rail and from this plate projects vertically, a stem, or pin
having a screw thread formed around it and upon this stem is mounted a pedestal
bored to clear the said screw thread and to rotate thereon and externally with a
projecting tongue piece or finger. Over the pedestal on the screw stem is a
screwed and milled travelling and locking nut. Upon the end of the screwed stem
is a button or head adapted to control the extent of relative movement of the
pedestal. In the base plate of the pedestal as herein after more particularly
described are two holes in a right line one with the other and there is also another
one as will be more particularly described located at a point about at a right angle
to the others into which a downwardly projecting pin from the underside of the
pedestal can be alternatively engaged.
In operation the travelling nut is raised and the pedestal partially raised and
turned so as to bring the finger, or locking piece over the lower sash meeting rail
and so prevent its rising; or to remove the locking finger. When the finger is
over the lower sash meeting rail and the travelling uut is screwed down no force

page_text: engagement and furthermore this locking down of the finger serves by its pressing
on the lower sash meeting rail plate to lock and secure both sashes against
rattling.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shews a front view in perspective of the improved fastening, unlocked, and
Fig. 2 shews the same, locked.
Fig. 3 shews a vertical section of the parts shewn by Fig. 2 taken in the same
plane as the line of meeting of the sashes, and Fig. 4 shews a similar section taken
at a right angle to the previous figure.
Fig. 5 shews a front view partly in section of a modification of the pedestal and
stem whereby the pin cl may be dispensed with, and
Fig. 6 shews an underside view of the same.
Fig. 7 shews the travelling and locking nut a' in section separately, and
Fig. shews a plan of the same.
a is the base plate screwed to the upper sash ; rising from this plate is the
screwed stem a¹ and this is crowned by the head a². a is a pedestal riding freely
on the stem a¹ but not engaging its screw thread and a is the travelling and
locking nut which by being rotated on the stem a' is caused to lock or unlock the
pedestal on or from the pin c¹ when the finger a³ thereof is placed with its hole a
over said pin. This pin c¹ is mounted on a base plate c secured upon the meeting
rail of lower sash d.
In accordance with a modification of my invention I dispense with the pin c¹ and
employ a plain base plate for the finger a³ to rest upon and hence the hole a
becomes unnecessary.
To prevent the pedestal being turned by means of a thin blade placed between
the two sashes I provide a downwardly projecting pin a' from the underside of the
finger and this pin a' drops into a hole as in the base plate a and when the locking
nut a comes down upon the top of the pedestal a³ the fastening is immovable from
the exterior. This pin a' by being dropped into either of the side holes a, a
keeps the finger correctly in its unlocked position at right angles to its position
shewn in Fig. 2, i.e., as shewn in Fig. 1.
The like locking effect may be attained by an analogous device, as by a square
hole al for a part of the way up the stem of the pedestal a³ which fits a similarly
squared lower part a" of the screw stem a'; the pedestal as being lifted on the
stem a¹ for turning and dropped down for locking (see Figs. 5 & 6).
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
1. The arrangement or combination and use of parts of window sash fastenings
consisting of a screwed stem, a pedestal or barrel and projecting finger secured by
a locking nut or screwed following nut adapted to coöperate together substantially
as set forth.
2. The improved window sash fastening or locking device constructed and
operating substantially as set forth.
Dated this 2nd day of Jul 1902
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.