IMPROVEMENTS IN SASH FASTENERS
Year: 1884

page_text: We JOSIAH WILLIAM SAUNDERS, DAVID THOMAS DAVIES, and JAMES ALEXANDER
MACDONALD trading as Saunders, Davies, and Macdonald, of Ryland Works,
Upper Tower Street, Birmingham, Brass founders, do hereby declare the nature of
our said invention for IMPROVEMENTS IN SASH FASTENERS to be as follows:-
-
This Invention of Improvements in sash fasteners is applicable to the ordinary
lever fastener, having the lever, with knob, spring and catch, the lever being fixed
on a suitable plate screwed to the meeting bar of the top sash, and the catch to a
plate screwed to the meeting bar of the bottom sash in the ordinary way.
It consists of improvements whereby the lever upon being released from the
catch (which is done by pressing a thumbplate) will spring back automatically
and so enable the sash to be opened this being provided for by the peculiar shape
of the end of the lever upon which the spring works, and also by the shape of the
end of the spring the former having one of the corners rounded off and the spring
being curved at its working end so that it will press against the other corner
& curved surface.
The catch consists of a ratchet shaped projection on the underside of a pivotted
catch plate the bevel part of the said catch causing it to lift automatically as the
lover is being adjusted and the square part holding it fast when it is adjusted.
The catch plate is sufficiently heavy to fall of its own weight for the purpose of
adjusting, and is lifted by pressing a thumbplate.
Immediately the catch plate is pressed and the catch freed from the lever the
latter flies back automatically and clears itself of the bottom sasb.

page_text: MACDONALD trading as Saunders, Davies & Macdonald of Ryland Works Upper
Tower Street Birmingham in the County of Warwick Brass Founders, do hereby
declare the nature of our invention for IMPROVEMENTS IN SASH FASTENERS and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
In the accompanying drawings
Fig. 1 is a plan.
"
2 is a side elevation of the catch.
This invention is applicable to the ordinary lever sash fastener, having the 1
lever A. with knob spring & catch, the lever being fixed on a suitable plate for
screwing to the meeting bar of the top sash, and the catch to a suitable plato
for screwing to the meeting bar of the bottom sash in the ordinary way.
It consists of improvements whereby the lever or arm A upon being released
from the catch (which is done by pressing a thumbplate B) will spring back 1
automatically and so enable the sash to be opened this being provided for by the
peculiar shape of the end of the lever A¹ upon which the spring works, and also by
the shape of the end of the spring O¹ the former having one of the corners rounded
off, and the spring being curved at its working end so that it will press against the
other corner and curved surface or an anti-frictional wheel attached thereto.
The catch D consists of a ratchet shaped projection on the underside of a
pivotted catch plate E the bevel part of the said catch causing it to lift auto-
matically as the lover is being adjusted and the square part holding it fast when
it is adjusted.
The catch plate is sufficiently heavy to fall of its own weight for the purpose of
adjusting and is lifted by prossing a thumplate.
Immediately the catch plate is pressed and the catch freed from the lever tho
latter flies back automatically and clears itself of the bottom sash.
The advantages are that the sash fastener is more readily released & at the same
time rendered perfectly secure by means of the catch.
Having now particularly described & ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
1. The end of the spring being of such a curve that it will force the lever back
in combination with the end of the lever being of such a shape as to allow it to :
move back as herein before described & illustrated by the accompanying drawings. .
2. The end of the spring being of such a curve that it will force the lever back
and the end of the lever being of such a shape as to allow it to move back in
combination with the pivotted catch plate as hereinbefore described & illustrated
by the accompanying drawings.
1
000