AN IMPROVED WINDOW SASH FASTENER to be as follows:
Year: 1885

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I HENRY AUGUSTUS WILLIAMS of 37 Gurney Road Stratford in the County of
Essex, Clerk, do hereby declare the nature of my said invention for "AN IMPROVED
WINDOW SASH FASTENER to be as follows:-
"
My, invention relates to an improved window fastener whereby the sashes,
whether in the closed or partly open position, are effectually prevented from being
opened or from being opened wider (as the case may be) from the outside..
This invention is an improvement on a former one for which Letters Patent
were granted to me dated 13th August 1884 No 11,224 and it has for its object to
ensure greater security.
The sashes are provided with independent fasteners of similar construction
except in so far as the one is adapted to prevent the lowering of the upper sash
and the other to prevent the raising of the lower sash. The fastener consists of a
spring latch applied to the stile of the sash and adapted to engage with a rack
affixed to the widow frame, the bevel of the latch and of the rack teeth being
adapted to prevent the opening motion of the sash whilst permitting its closing
motion. The latch projects from the edge of the window sash instead of from the
face of the sash and the rack is counter sunk into the face of the pulley.stile
instead of being fixed to the parting bead as in the former case.
The parts of the latch mechanism are carried by a plate termed the latch plate
which is screwed, to the inner face of the sash stile over a recess cut therein.'
The latch bolt is fitted to slide in a suitable guide and is jointed to one end of a
lever pivoted at the other end to the back of the latch plate. The latch is thrown
out by a spring and is withdrawn by means of a tumbler actuated by a thumb
lever or button countersunk into the outer face of the latch plate. This tumbler is
in the form of a cupped disc which fits and turns as on a centre upon a circular
flange or rim cast on the back of the latch plate, and it is provided with a wiper
or projection, which, when the tumbler is partially rotated, comes in contact with
the latch lever and presses it backwards.
I

page_text: I HENRY AUGUSTUS WILLIAMS of 37 Gurney Road Stratford in the Parish of
West Ham in the County of Essex, Clerk in a Public Company, 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:—
No 1 Front view of the fastening shewing the position of the lever A and
wedged shape bolt head B projecting when acting on the rack or perforated plate in
the window frame.
N° 2-Back view of the fastening shewing the position of the crank or arm C
working on a screw D in the plate and connected with the bolt B and position of
the cap or motion plate E connected to the lever A and kept in position by the
spring F.
No 3-Front view of the fastening shewing the position of the lever A after
forcing the crank or arm C back, thereby releasing the bolt B from the rack or
perforated plate in the window frame,
No 4-Back view of the fastening shewing the position of the crank or arm C
working on a screw D in the plate and connected with the bolt B--and position of
the cap or motion plate E connected to the lever A and kept in position by the
spring F.
No 5-Back view of the plate shewing the raised boss G for the cap or motion
plate E to work on and bolt hole at the top.
N° 6-Side view of the plate shewing the position of the bolt hole and the
projecting boss G.
N° 7-View of the bolt B detached from the crank or arm C.
N° 8-Side view of the bolt B detached from the crank or arm C with projecting
pin to fit into the socket of the crank or arm C.
N° 9 The crank or arm C shewing the socket to receive the projecting pin of
the bolt B. to work in, and hole for the screw D to fasten to the plate.
N° 10-Back and side view of the lever A with square pin projecting to fit into
the centre hole of the cap or motion plate E.
No 11-View of the cap or motion plate E with square hole in the centre to
connect or receive the pin of the lever A.
N° 12-Section of the cap or motion plate E.
N° 13-Front view of the malleable iron rack to be let into the Window frame
flush with the surface facing the edge of the sash frame.
N° 14-Side view of the malleable iron rack with screw holes at each end to
fasten to the window frame.
N° 15-View of the iron plate with perforated square holes to receive the head
of the bolt B-to be fixed to the window frame facing the edge of the sash frame.
N° 16-View of the Window shewing the position of the fastening on the sash
frame and the rack fixed or let into the window frame facing the edge of the sash
frame.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1** The wedge shape bolt B acting on the rack or perforated plate in the window
frame.
2nd The mode or action of the lever A in forcing back and releasing the bolt B
from the rack or perforated plate let into and attached to the window frame facing
the edge of the sash frame.
3rd The rack or perforated plate to be let into and attached to the window
frame facing the edge of the sash frame.
Dated this 30th day of March 1886.
HENRY. AUGUSTUS WILLIAMS,