Year: 1897

page_text: Date of Application, 24th Nov., 1897
Complete Specification Left, 12th Feb., 1898-Accepted, 9th Apr., 1898
I, THOMAS WILLIAM BRIGHTMAN, of 33, South Street, Queenborough, Kent,
Carpenter, do hereby declare the nature this invention to be as follows:-
'This invention relates to an improved fastener for use with sashes, and provides
a simple arrangement which will securely fix the sashes together and which will
not be liable to opening from the outside.
In carrying out my invention, on the meeting rail of one sash a plate is screwed
carrying a lug or bar serving to receive a pin on which the locking arm is fitted.
The locking arm is thus pivoted and can turn horizontally so that one end projects
over the other meeting rail.
This arm is provided with a handle by which it can be operated and also a spring
causing it when released to spring back clear of the other meeting rail. On this
meeting rail a plate is also screwed carrying a second arın. This arm or lever is
curved and the curved part is also forked. The locking arm above described is
provided with a small projecting part at its end.
This projection extends on both sides so that a hammer head is formed. When
the arm is turned round into locking position, it projects between the sides of the
fork and the head engages with the curved surface of the second arm. As this
curve is not concentric with the pivot of the locking arm, the second arm which is
also pivoted and provided with a spring at one end is drawn slightly back against
the force of the spring until the head meets a notch formed in the second arm.
When this notch is reached the curved arins springs back and holds the locking
arm in position. The curved arm is provided with a small thumb piece which when
pressed causes the locking arm to be released, this arm then springing back clear of
the sash.
Stops are provided which limit the motion of both arms.
I, THOMAS WILLIAM BRIGHTMAN, of 33, South Street, Queenborough, Kent,
Carpenter, 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 fastener for use with sashes, and provides

page_text: a simple arrangement which will securely fix the sashes together and which will
not be liable to opening from the outside.
In carrying out my invention, on the meeting rail of one sash a plate is screwed
carrying a lug or bar serving to receive a piu on which the locking arm is fitted.
The locking arm is thus pivoted and can turn horizontally so that one end projects
over the other meeting rail.
This arm is provided with a handle by which it can be operated and also a spring
causing it when released to spring back clear of the other meeting rail. On this
meeting rail a plate is also screwed carrying a second arın. This arm or lever is
curved and the curved part is also forked. The locking arm above described is
provided with a small projecting part at its end.
.
This projection extends on both sides so that a hammer head is formed. When
the arm is turned round into locking position, it projects between the sides of the
fork and the head engages with the curved surface of the second arm. As this
curve is not concentric with the pivot of the locking arm, the second arm which is
also pivoted and provided with a spring at one end is drawn slightly back against
the force of the spring until the head meets a notch formed in the second arm.
When this notch is reached the curved arm springs back and holds the locking arm
in position. The curved arm is provided with a small thumb piece which when
pressed causes the locking arm to be released, this arm then springing back clear
of the sash.
Stops are provided which limit the motion of both arms. In order that the
invention may be more clearly understood reference is had to the accompanying
sheet of drawings in which Fig. I is an elevation showing a sash fastener
constructed according to this invention. Fig. 2 is a section of the sashes, Fig. 3 is
a plan thereof and Fig. 4 shows a slightly modified arrangement.
On the meeting rail a a plate 6 is secured having a lug c serving to receive the
pind on which the locking arm eis pivoted so that it can turn horizontally the
end e being caused to project over the other meeting rail a¹. The arm e is provided
with an operating knob e² and a spring e³ is arranged so that when the said arm e
is released, it will spring back clear of the other meeting rail. On the meeting
rail a¹ a plate is secured and the curved and forked lever f, is pivoted at y
thereon.
The end of the locking lever e slides between the two members of the forked
lever f, fl and is provided with a small projecting part extending on both sides
so that a head et is formed which when the arm e is turned into the locking position
engages with the curved and forked lever f, f¹. The curve of the lever f, is not
concentric with the pivot d of the locking arm e so that when the arm e is turned
into locking position the lever f, f is moved slightly on its pivot against
the spring until the head e engages in the notch 2 formed in the lever f, f¹.
The lever f, then springs back and holds the aru e in position thus securing
the window sashes.
In order to operate the curved lever f, f' a catch i is pivoted thereto.at . The
catch is formed with two members, and a flattened or cam surface
is formed at it. On pressing the member 3 of the catch, the flattened or
cam surface pushed against the projecting portion 62 of the plate b¹
so that the end of the lever f, f is forced away from the said projecting
portion b² to a sufficient extent to release the head from the notch f. The
locking arm e then springs back under the influence of the spring e³, clear of the
sash.
Suitable stops may be provided if necessary.
In the modification illustrated in Fig. 4, the lever f, f¹ is replaced by the curved
lever k pivoted at ¹ and having a notch 2 into which the end et of the lever e
engages. To release the levere the end of the lever is depressed against the
spring so as to raise the other end of said lever k, and bring the notch k² out of
engagement with the lever e.

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) An improved fastener for sashes comprising a locking lever pivoted upon one
sash and a curved lever pivoted on the other sash, having a notch into which the
end of the locking lever engages and means for moving the curved lever sufficiently
to allow the head of the locking lever to be disengaged from the notch and release
the said locking lever substantially as described.
(2) An improved fastener for sashes comprising a locking lever pivoted upon one
sash and a curved lever pivoted on the other sash, the curve of the lever being such
that when the locking lever is operated, the curved lever is pressed inwards
against the influence of a spring until the head of the locking lever engages in a
notch formed in the said curved lever, and a suitable device adapted to move the
curved lever sufficiently to allow the head of the locking lever to be disengaged
from the notch and release the said locking lever, substantially as described.
(3) An improved fastener for sashes comprising the locking lever e pivoted upon
one sash and a curved and forked lever f, pivoted upon the other sash the
head of the lever e being adapted when the lever e is operated to force the
lever f, f inwards until the said head et engages in the notch 2, and a catch i
having a flattened or cam portion it so that when it is pressed, the lever f, fis
forced back so that the head of the locking lever e is disengaged from
the notch substantially as described with reference to Figs. 1, 2 & 3 of the
accompanying drawings.
(4) An improved fastener for sashes comprising a locking lever e pivoted upon
one sash and a pivoted lever k upon the other sash, the locking lever being adapted
when operated to engage in a notch &² formed in the under-side of the lever kand
being released by depressing the other end of the lever so as to disengage the
lever e out of the notch substantially as described with reference to Fig. 4 of the
accompanying drawings.
Dated this 19th day of Fab 1908
"
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.