An Improved Sash Fastener.
Year: 1892

page_text: Date of Application, 27th May, 1892
Complete Specification Left, 24th Dec., 1892-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Sash Fastener.
I TIMOTHY VINCENT RIORDAN of 38 Gracechurch Street, London, E.C.,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in sash fasteners and briefly is a latch
mounted on a base plate and so adapted that when the knob or lever is pushed
the latch engages with the latch hook at same time drawing the sashes together.
so as to prevent draughts of air from entering between the sash frames, also
making it difficult for a burglar to insert a knife or file to either cut or unlock
the latch. My improved sash fastener consists of four parts viz. the base plate;
the latch, the knob or lever to lock or unlock the latch, and the latch hook.
The latch is provided with a hook to engage with the latch hook fitted on the
lower frame of the upper sash in the usual manner.
4
The base plate is fitted on the top frame of the lower sash and is fastened
to the frame by screws in the usual manner. The latch part is fitted between :..
the base plate and the knob or lever which engages or disengages the latch
from the latch hook. The latch part where it is in contact with the base plate
and knob or lever has a perforation through its centre and a slot cut in the
form of a semicircle between the central perforation and its outer edge. The....
knob or lever is provided with a projecting central pin which passes through
the central perforation in the latch and through a central perforation in the
base plate, and is rivetted at its lower extremity-the knob or lever has also a.:
short projecting pin between the central or fastening pin and its outer edge made
so as to engage in the semicircular slot in the latch.
When the parts are all fitted properly together and the knob or lever is turned
a quarter of a circle the short pin projecting from the under side of the knob or
lever engages with the latch turning it so that it engages with the sash hook
fastened on lower frame of upper sash,-
-on turning the knob or lever a further
quarter circle it has the effect of pulling the sash hook and upper sash towards the
base plate and lower sash, thus tightening the frames together. This action is due
to the short pin engaging in the semicircular slot' producing an eccentric motion.
Dated this 27th day of May 1892.
'
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents.
COMPLETE
SPECIFICATION.
An Improved Sash Fastener.
TIMOTHY VINCENT RIORDAN, of 38, Gracechurch Street, London E.C.
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 :-
My invention relates to improvements in sash fasteners and consists of a latch
mounted on a base plate and so adapted that when the knob or lever is pushed, the
latch engages with the latch hook at same time drawing the sashes together, so as
P1

page_text: to prevent draughts of air from entering between the meeting rails of the sashes
and making it difficult for a burglar to insert a knife or file to either cut or unlock
the latch.
My improved fastener consists of four parts viz. the base-plate, the latch, the
knob, or lever to lock or unlock the latch, and the latch hook.
The latch is provided with a hook to engage with the latch-book fixed on the
meeting rail of the upper sash in the usual manner. The base-plate is screwed in
the usual manner on the meeting rail of the lower sash. The latch is fitted between
the base-plate and the knob or lever which engages or disengages the latch from the
latch hook.
At the points of contact with the base-plate and the knob or lever, the latch has
a central perforation continued by a curved slot cut at right angles thereto..
The knob or lever is provided with a downward projecting central pin which
passes through the central perforation in the latch and through a corresponding
central perforation in the base-plate, and is rivetted at its lower extremity.
The knob or lever has also a short projecting pin between the central or fastening
pin, and its outer edge arranged to engage in the semicircular slot in the latch.
When the parts are all fitted properly together and the knob or lever is turned
a quarter of a circle the short pin projecting from the under side of the knob or
lever engages with the latch, turning it so that it engages with the sash hook
fastened on lower frame of upper sash, on turning the knob or lever a further
quarter circle, it has the effect of pulling the sash hook and upper sash towards the
base-plate and lower sash, thus tightening the frames together: This action is due
to the short pin engaging in the semi-circular slot producing an eccentric motion.
In the accompanying drawings
*-
Fig. 1 is a plan of my improved sash fastener fixed to the meeting rails of the
upper and lower sashes which are shown tightly locked together and Fig. 2 is a
corresponding side view.
Fig. 3 is a plan of the base-plate,
Fig. 4 a plan of the latch and Fig. 5 an underside view of the latch with the
knob or lever in position underneath.
Fig. 6 is an underside view of the lever or knob.
Like letters of reference indicate corresponding parts throughout the figures.
The base-plate a, the latch b, the lever or knob c and the latch hook d may be
made of any suitable metal and are either cast or stamped. The base-plate a which
is fixed by screws to the meeting rail M¹ of the lower sash is furnished with a
central perforation e formed in a recessed part thereof and wherein enters the pin f
of the lever c which pin is rivetted upon the underside of the plate a the latter
being further provided with the slots g and hand the shoulder i. The latch b which
is secured to the base-plate by the pin f aforesaid has a rectangular opening j
rounded along the edges to permit of the ready motion of the pins f and f' of the
lever or thumb-piece c.
The hooked end of the latch & engages with the latch hook d screwed upon the
meeting rail M of the upper sash. The three parts a b c being secured together in
superposed order by the pin and the fastener being in an open or unlocked
position, on turning the thumb piece c upon its pin f to the left hand side, the pin f¹
will bear against the edge k of the opening; and the latch will be brought in
position ready for locking, that is to say, will engage with the latch hook d this
position of the pins ff being shown in full lines in Fig. 5. By continuing to turn
the thumb piece c the pin is moved in the direction of the arrow along the edge k
until it assumes the position shown in dotted lines in Fig. 5, the pin ƒ meanwhile
travelling along the straight part of the slot until it reaches the end thereof
assuming the position shown in dotted lines in the same figure, in this motion the
hooked end of the latch pulls the latch hook d to, and thus brings the front:
and rear edges of the meeting rails of the upper and lower sashes in close contact,
thus tightly locking the same....
C

page_text: The latch is prevented from being turned further back when in its unlocked or
horizontal position owing to the edge m of the shoulder n abufting against the
lower edge of the shoulder i Fig. 3.
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 :-
:-
The improved sash fastener arranged constructed and operating substantially as.
herein described and shown.
Dated this 24th day of December 1892.
HUGHES, SON & Co.,
38, Chancery Lane, London, Agents for the Applicant.