Improvements relating to the Locking or Fastening of Sliding Sashes and the like and to Apparatus therefor.
Year: 1889

page_text: .Date of Application, 16th Apr., 1889
Complete Specification Left, 23rd Aug., 1889-Accepted, 26th Oct.,
4889
PROVISIONAL SPECIFICATION.
Improvements relating to the Locking or Fastening of Sliding
Sashes and the like and to Apparatus therefor.
I, HARRY ALGAR, of Saint Mary Cray, in the county of Kent, Schoolmaster, do
hereby declare the nature of this invention to be as follows:-
My invention relates to improved means for locking sliding sashes and the like
in any position in which it may be required to place them.
According to my said invention two notched plates or racks are secured on the
side bars of the sashes opposite to each other and through the window frame
extends a bolt adapted to enter a notch in each of the plates simultaneously so that
when the bolt is in such engagement neither sash can be moved.
The bolt is advantageously operated by a rod extending some distance into the
wall adjacent to the window frame so that a person by passing his arm through the
window from the outside or by cutting away a portion of the window frame cannot
operate the bolt. A spring, screw or other device is provided at the end of the rod
for holding the bolt out of engagement with the notched plates while the sashes are
being raised or lowered.
Dated the 16th day of April 1889.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Locking or Fastening of Sliding
Sashes and the like and to Apparatus therefor.
I, HARRY ALGAR, of Saint Mary Cray, in the county of Kent, Schoolmaster, 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:
My invention relates to improved means for locking sliding sashes and the like
in any position in which it may be required to place them.
one of
According to my said invention a notched plate or rack is secured on
the side bars of each of the sashes, and through the window frame extends a bolt or
bolts adapted to enter a notch in each of the plates simultaneously, so that when
the bolts are in such engagement the sashes cannot be moved.
The bolt is advantageously operated by a spring rod extending any required
distance into the wall adjacent to either side of the window frame, so that a person
by passing his arm through the window from the outside or by cutting away a portion
of the window frame cannot operate the bolt.
In order to enable my invention to be fully understood I will describe how it can
be carried into practice by reference to the accompanying drawing, in which―
Figure 1 is a front elevation of a window-frame and sashes with my improve-
ments applied thereto, part of the frame being broken away to clearly shew the
same.
Figure 2 is a horizontal section on the line A B of figure 1.
Similar letters in both the figures indicate similar parts.
a is the window-frame and b, b' are the sliding sashes, both of which parts are of
ordinary construction.
c and clare the notched plates or racks which I secure to the side bars of the
upper and lower sliding sashes b and b¹ respectively.

page_text: d, d' are the bolts which extend through the window-frame a and engage in the
notches or teeth of the racks c and c¹ respectively. e, e' are the spring rods forming
extensions of the bolts d, d¹ and, working in a guide block fin a box g conveniently
let into the wall of the room or other place, and having its front removable
to afford access to the interior for repairs or for other purposes. The springs of the
said rods abut against the guide block f and against the inner ends of the
bolts d, d¹.
The bolts d, d' are withdrawn from engagement with the racks c, c¹, when it is
required to open one or both of the sashes b, 61, by means of a handle h the spindle i
of which carries a two armed lever j, k, the short arm ; of which forms a tappet
adapted to press upon noses ont he spring rods e, e¹ and thereby move them both
back simultaneously when the handle is turned. The other arm k of the lever
forms a detent or catch which prevents the bolts being pushed back by any other
means than by turning the handle which can obviously be placed at any required
distance from the window so as to render it inaccessible from the outside.
m, m³ are pins on the bolts d, d' which pins by abutting against the end of the
box g limit the extent of motion of the bolts.
n is a plate fixed to the inside of the window frame and forming a guide for the
fore ends of the bolts d, d¹.
By this construction it will be evident that the sashes will be automatically locked
in any position to which they may be moved and can only be unlocked by a person
inside the room or other place.
Instead of employing two bolts as hereinbefore described and illustrated in the
drawing I can obviously use a single bolt adapted to enter a notch in each of the
racks simultaneously. Moreover other means than those herein before described and
shewn could be employed for operating the bolts d and d¹.
Wires to operate electric or other alarm bells can, if required be attached to any
portion of the bolts or levers.
In cases where the windows are situated beyond a person's reach, the bolts d, d'
can be arranged to be operated by a lever and suitable gearing instead of directly by
the handle h.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is
(1) Means for locking or fastening sliding sashes and the like, comprising a
notched plate or rack secured to each sash in combination with a bolt or bolts
adapted to engage with the teeth of such racks and extending through the window
frame operated at a distance therefrom substantially as hereinbefore described.
(2) The improved apparatus for locking or fastening sliding sashes and the like,
herein before described and illustrated in the accompanying drawing.
Dated the 23rd day of August 1080
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.