Year: 1887

page_text: Date of Application, 31st Aug., 1887
Complete Left, 3rd May, 1888
Complete Accepted, 8th June, 1888
I, WILLIAM ROBERT CROZIER, of No. 1, Leadenhall Street, in the City of London,
Merchant, do hereby declare the nature of this invention to be as follows:-
My invention relates to the construction of an improved locking sash fastener and
is intended to produce a cheap and efficient locking fastener which cannot be easily
opened from the outside of the window.
It consists in forming lateral extensions upon the shank of the well known knob
or thumb-piece, which extensions enter a circular hole in the staple when the bar is
pulled under the latter and being turned in said hole are prevented by the comparative
narrowness of the slot at which they were entered from being withdrawn from the
staple until they shall have been turned back to the relative position which they
occupied at the moment of entering.
In carrying my invention into effect, I make the shank of the well-known knob or
thumb piece capable of rotation in the end of the fastener bar; and provide this
shank with two lateral extensions of equal length.
I form a hole in the staple having a diameter equal to the distance of the outer
extremity of one extension from that of the other, and cut a slot from the said hole
to the edge of the staple only wide enough to allow the shank of the thumb-piece
and the extensions to pass through it when the latter are aligned, in the act of closing
the fastener, with the direction in which the shank is being moved.
The sash fastener is locked by giving a quarter turn or so to the shank after the
latter with the extensions thereon have entered the circular hole in the staple.
Any suitable spring detent or declines may be adapted for the purpose of con-
tributing to the proper positioning of the said extensions.
1000
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: I, WILLIAM ROBERT CROZIER, of No. 1, Leadenhall Street, in the City of London,
Merchant, do hereby declare the nature of this invention, and in what manner tho
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to the construction of an improved locking sash fastener, and
is intended to produce a cheap and efficient locking fastener which cannot be easily
opened from the outside of the window.
It consists in forming lateral extensions upon the shank of the well known knob,
or thumb-piece, which extensions enter a circular hole in the staple when the bar is
pulled under the latter, and being turned in said hole are prevented by the comparative
narrowness of the slot at which they were entered, from being withdrawn from the
staple until they shall have been turned back to the relative position which they
occupied at the moment of entering.
In order that my invention, and the means by which the same can be carried into
practical effect, may be thoroughly understood, I will now describe it in detail,
referring in so doing to the accompanying drawings which are to be taken as part of
this specification and read therewith.
Fig. 1 is an elevation of the sash fastener and part of the bottom bar of the top
sash.
Fig. 2 is a plan of the sash fastener and staple with parts of their respective
sashes. The full lines shew the fastener open and the dotted lines shew it fastened.
Fig. 3 is likewise a plan illustrating the shank in the act of entering the slot in the
staple, the thumb piece or knob being omitted.
The foregoing figures illustrate the application of my invention to a sash fastener,
the bar of which is provided with the well known bar-spring for holding it in either
the open or locked position.
Fig. 4 is an elevation illustrating a modified form of my invention, according to
which the said spring is dispensed with, and the back plate furnished with a staple
in which the shank of the fastener can be engaged for the purpose of holding the
sash fastener open.
A is the bar pivotted in the usual way to the back plate, a.
B is the thumb piece; and, b, its shank. The latter, instead of being fast to the
end of the bar, A, is pivottally connected thereto, so that it can turn freely about its
own axis.
The said shank has two lateral extensions 61, 61, formed upon it, one opposite the
other.
is the staple. It has a circular hole, c, formed in it, the diameter of which is a
trifle greater than the distance separating the outer extremities of the extensions, b¹.
D is a slot cut through the staple, C, to the hole, c; and opening out therefrom in the

page_text: direction of the arc through which the shank, b, moves. The slot is just wide enough
to admit the said shank.
The thumb piece is aligned with the extensions, 61, and is preferable to a knob,
inasmuch as it indicates the plane in which the said extensions lie.
When the bar, A, is unlocked, and thrown back into the position illustrated in
either Figs. 1 or 2, the thumb piece, B, may be conveniently left in the position
illustrated in the latter figure. As it and the bar, A, are swung forward towards the
staple, the extensions, 61, will pass through the slot, D, into the hole, c; and a quarter
turn given to the thumb piece brings the said extensions across the hole as indicated
by the dark space in Fig. 2, when the bar will be locked securely against any attempts
to unlock it by the introduction, from the outside, of a knife-blade or similar
instrument, between the sashes.
To unlock the bar, the thumb-piece is turned until the extensions, b, are aligned
with the slot, D, through which they are moved, and the bar swung back to the back
plate, a.
In the modification of the invention illustrated in Figs. 4 and 5, a second staple, C³,
hole, c', and slot, D', are formed on the back plate, a, in which the bar, A, can be
locked back in the same way as described above with reference to the staple, C, hole, c,
and slot, D.
I do not confine myself to the number of extensions, b¹ one only may be used,
but I prefer two.
Having now particularly described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1. The combination, in a sash fastener, of bar, extension, and staple having a slotted
hole adapted to receive said extension, substantially as described and illustrated in the
accompanying figures.
2. The combination, in a sash fastener, of a pivotted bar, one or two extensions
upon the shank of the thumb piece or knob, said shank being adapted to turn about
its axis in the end of the said bar, a staple adapted to receive the said bar under it,
and a hole and slot in the said staple adapted to receive the said one or two extensions,
substantially as described with reference to the accompanying figures.
3. The combination in a sash fastener, and for the purpose of locking the bar
thereof, of an extension or extensions upon the shank of the thumb-piece or knob, the
shank of which is adapted to move about its own axis in the end of said bar, and
staples adapted to receive said shank and extension, or extensions, substantially as
described with reference to the accompanying figures.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.
Lun nuz
Su NOCK