Improvements in Window Fastenings.
Year: 1893

page_text: Date of Application, 24th Aug., 1893-Accepted, 30th Sept., 1893
COMPLETE SPECIFICATION.
Improvements in Window Fastenings.
I, ALFRED RICHARD BURTON, of Hare Street, Buntingford, in the County of
Herts, Engineer, 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 that class of window fastenings in which the act of
raising or lowering a sash from the inside unfastens the catch by which it is held
in position and the invention is applicable to sashes whether suspended by lines
or not.
The arrangement when sash lines are not required is shown at Figures 1 to 5 of
the drawings Figure 1 being an elevation froin the inside of the room, Figures 2
and 3 an elevation and side view of the upper sash fastener, and Figures 4 and 5
similar views of the lower sash fastener. In these views the covers of the locks
are removed.
a a and b b are racks preferably made of angle or T iron fixed to the frame of
the window. The edges of the sashes are grooved to receive these racks and are
fitted at top and bottom with grooved brasses cc to take the wear and prevent
friction The teeth in the upper racks a are inclined as shown whilst those in the
lower racks 6 are square. d d are bolts pivotted to the upper sash at d' d', they are
provided with weighted tails 2 d² or springs d³ ³ or both as shown so that they
always tend to engage with the racks a a and prevent the sash from being lowered.
ee are cords fixed at e¹¹ to the bolts d d and passing over pulleys 22 on the
upper sash and e³ ³ at the top of the window and their lower ends are provided
with handles e e. When these cords are pulled the bolts d d are withdrawn from
the racks a a and the upper sash can be either raised or lowered.
fare bell crank levers pivotted at ff to the lower sash and each having one
arm slotted to receive a pin g' on bolts g which pass through holes in the brasses c c
and enter the teeth of the racks bb. The other arms of the levers fare pivotted
to rods h having eyes ' at their upper ends to which cords j are attached. These
cords pass over pulleys at the top of the window and their other ends are
provided with handles. The bolts may be caused to engage with the racks bb
either by springs 2 upon them or by weights 2 on the rods or by both as shown.
It will be seen that when the cords j are pulled the bolts g are disengaged from
the racks and the lower sash can be either raised or lowered.
Figures 6 and 7 show the arrangement for the upper and lower sash respectively
for windows fitted with sash lines. In these figures the same letters are used as
before. As will be seen the upper sash is provided with two cords E e at each
side. The cords E are the ordinary cords for lifting the sash, they pass over
pulleys E at the top of the window and are provided with handles E2. The
cords e for lowering the sash only pass over the pulleys e², the pulleys e³ of the
former arrangement being dispensed with.
In the lower sash the bell crank levers f have rings F fixed to them. When
these rings are pulled up the bolts g are first withdrawn and then the sash is lifted
by the rings.
Figure 8 shows a modification in which the bell crank leverf is replaced by two
levers and the first actuated by the ring F and the second acting as a pawl
engaging with the rack b.
m Figure 9 shows a guard which prevents the ring F from being taken hold of
from the outside when the lower sash is slightly raised.

page_text: 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. Window fastenings substantially as described and shown in the drawings.
2. The racks a and b formed of angle or T iron and entering grooves in the
sashes substantially as described.
3. The combination of the guards m with the rings F substantially as
described.
11
1000
A. R. BURTON.