Year: 1888

page_text: .
THOMAS PARKES 52 Wellington Street Bilston Staffordshire Commercial Traveller,
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 an improved method, of constructing fasteners, for securely
locking together the rails, or frames, of moveable window sashes.
I construct a bolt, circular in shape, as seen on plan Fig. 6. so that when the sashes
are locked together, the circular bolt prevents them from being unfastened, by any
instrument from the outside; unless a pane of glass, be either first broken, or
renioved.
This circular shaped bolt, may be made from round, oval, square, or any other
shaped metal, as required.
The frame or case must be in two parts, as seen at AA; and in which the
bolt Fig. 6 is to move. The frame or case is circular and adapted for the reception
of the bolt. The bolt and frame, may be made in brass, iron, steel, nickle; or in any
other suitable metal. Each part of the frame, or case, may be cast in metal separately;
or the frame, or case, may be stamped from metal separately; or the frame, or case,
may be cast, or stamped in one piece; and then sawed, or cut through, if found
more convenient.
One of these parts.I use as an aperture, or socket, for the reception of the bolt ;
and fix it upon that rail, or sash, next to the window. The other part, 1 fix upon
the opposite rail, or sash, having first made in it a slot, as seen at D D. I.then take
the bolt, and drill a hole through it; near to that end, which is not tapered round
to a point; and having obtained a knob; peg shaped underneath it; I pass
this peg,
first through the slot D. D. and then through the hole in the bolt; as seen in Fig. 6.
I then rivet, or screw the knob, and bolt, strongly together.
In fixing, I place one part about one eighth of an inch distant from the other. This
arrangement prevents the circle from being formed; so that, as soon as the bolt is
moved forward by the knob, (now attached) the round tapered, or wedge shaped end
of the bolt, is easily forced to enter the aperture, or socket, even when the socket is
from various causes removed, a little out of its proper place; and commences at the
same time, to bind, or lock, the sashes firmly together; as seen at Fig. 1; and
prevents the sashes from being shaken by the wind. Each part of the frame, or
case, may be covered over with a plate; or left uncovered when required; as seen
at Fig. 4.
Fig. 1 plan showing the bolt fastened, and the sashes draw together.
Fig. 2 is a section taken on the line a a of Fig: 1; looking in the direction of
the arrow.
Fig: 3 is a section on the line b. b. Fig. 2.
A
L

page_text: Fig. is a front elevation.
Fig. 6 will be described later on.
a a the cases.
B the bolt which is operated by the knob C; which is attached to
the bolt, and which works in slot D.. E, E, is a bottom plate, rivetted to the case a, a.
C, C, etc. snugs on case a, a; for rivetting plates, E, E, to same.
Fig. 6 is a detached view of the bolt B.
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
1 claim is,
1st. Neatness in appearance; strength of formation; simplicity of construction ;
and effectiveness in operation.
2nd. A circular shaped bolt, pushed backward and forward, in a circular case, or
frame by a connected knob; a method which prevents the fastener from being
unfastened, by any instrument from the outside.
3rd. The bolt being tapered round to a point, can enter the socket more readily,
and securely locks the sashes together.
Dated this Eighth day of January One thousand eight hundred and eighty nine.