Improvements in Window Sash and like Fastenings.
Year: 1895

page_text: Date of Application, 19th Mar., 1895-Accepted, 20th Apr., 1895
CUMI MIM
DIMITTUATION.
Improvements in Window Sash and like Fastenings.
We, WALTER THOMAS CHRISTIAN, of Clarence House, Loughton, in the
County of Essex, Mercantile Clerk, and ANDREW WILSON, of 18 Glaucus.
Street, Bow, in the County of London, Engineer, do hereby declare the nature
of this invention, and in what mauner the same is to be performed, to be
particularly described and ascertained, in and by the following statement:—
This invention relates to window sash and like fastenings.
Figure is a vertical longitudinal section, and
Figure 2 is a plan of our improved fastening shown applied to a pair of window
sashes.
Figures 3 and 4 are similar views of a modified form of fastening in which the
spring for shooting the fastening bolt is dispensed with.
A is the lower sash, and B the upper sash; C is the sliding bolt of the
fastening.
In the construction shown in Figures 1 and 2 the bolt C is mounted with a
capability of sliding in a box D secured to the sash A. The bolt projects through
holes in the front and rear walls of the box and its inner end is furnished with a
knob or head C¹ by which it can be drawn back to unlock the fastening. E is a
spiral spring surrounding the bolt and compressed between the front wall of the
box and a shoulder C2 on the bolt. Secured to the sash B is the eye-piece F into
which the bolt C enters to lock the sashes as shown in Figure 1.
The bolt when shot is retained in the locked position by a catch H carried by
a spring H which is secured to the box D at H2. The said catch automatically
engages with a shoulder C³ of the bolt when the latter is shot. To draw back the
bolt it is necessary first to depress the spring catch H which is done by pressing
down upon the end of the spring at H³.
G is a catch carried by a spring G¹ that is fixed to the box D at G². When
the bolt C is drawn back and either of the window sashes opened the spring
catch G engages with the outer end of the bolt and retains the bolt in the unlocked
position. The spring G¹ is so arranged that its outer end is raised and supported
by the eye-piece F when the window sashes are closed, the catch G being thereby
disengaged from the bolt. By this means the closing of the window operates to
free the bolt C whereupon the said bolt is shot by its spring E into the eye-
piece F. It will thus be seen that when the bolt C is drawn back and the window
opened, the spring catch G retains the bolt in its withdrawn or unlocked position,
and when the window is again closed the spring catch G is raised by the eye-
piece F to release the bolt which latter then shoots into the eye-piece and is
locked therein by the spring catch H.
The shoulder C of the bolt, and the face of the spring catch H are preferably
serrated or grooved to ensure a secure hold and prevent the slipping of the catch
when the bolt C is pulled or pushed in the direction for withdrawing it from the
eye-piece.
In Figures 3 and 4 we have shown a fastening in which the spring E is
dispensed with, and one therefore in which there is no need for the spring
catch G. In this instance the bolt is shot by hand when the windows are closed.
The box D of Figures 1 and 2 is replaced by a plate K having a raised part K'
through a hole in which the bolt C slides. The bolt is attached to a plate L that
is slotted at L' and is guided by a stud M that passes through the said slot and is

page_text: fixed to the plate K. The inner end of the plate K being turned up forms a
convenient handle L' for operating the bolt.
The aforesaid improved fastenings can obviously be applied to flaps, doors and
the like as well as to window sashes.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is :-
1. A window sash or like fastening provided with a spring-controlled bolt and
with two retaining catches therefor, one of said catches being arranged to be
automatically disengaged from the bolt by the closing of the sash to ensure that
the bolt shall be shot and locked when the window is closed, substantially as
described.
2. A window sash or like fastening constructed substantially as described with
reference to Figures 1 and 2 or to Figures 3 and 4.
Dated this 19th day of March 1895.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.