Year: 1899

page_text: Date of Application, 28th Aug., 1899-Accepted, 21st Oct.,
1899
I, LAMBERT ALLAN MURDOCH MCKAIL, of Tooronga Grove, Auburn, in the
Colony of Victoria, Cashier, 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:—
The object of my invention is to provide a fastener for window sashes which
shall not only be strong and durable but also effectually defy all the best directed
efforts of the most skilful of burglars. In the past some of the sash fasteners have
been defective either on account of the number of their parts or on account of
the ease with which they could be overcome. But with my invention a fastener
is produced which is not only cheap in first cost and easily applied but which
is also so constructed that there is nothing to become deranged. In addition to
which it is as a fastener practically unassailable.
My invention consists of a sash fastener consisting of two separate parts one
of which (the bolt carrier) is secured to the top of the meeting rail of the inner
sash and the other (the catch bolt) to the top of the meeting rail of the outer
sash. In the carrier is a bolt passage with a bolt therein and the front end of
which bolt is chamfered and passes into and engages with the chamfered mouth
hole on the catch on the outer sash. It is locked by tumbling stops operated by
the fingers.
But in order that my invention may be better understood I will now refer to
the accompanying sheet of drawings which are to be taken as part of this
specification and read herewith-
Figure 1 represents a side sectional view of the device with the bolt shot and
the two tumbling stops locking the same.
Figure 2 shews a perspective view. The bolt is back and the back tumbling
stop elevated and closing the end of the passage. The two parts of the device are
separated.
Figure 3 is a perspective view of the bolt removed from the carrier.
Similar letters of reference indicate similar or corresponding parts where
they occur in the several views.-
On reference to the drawings it will be seen that A is the bolt carrier which
is secured to the top of the inner sash B. In this is a longitudinal passage way C
along which the bolt D is reciprocated by hand. At the top of the bolt is the
finger push E which protrudes upwardly above the bolt carrier and by which the
bolt is operated. This push moves along the finger push slot F situated in the
top of the carrier and by the length of this slot the travel of the bolt is regulated.
In the back end of the passage way is the back tumbling stop G which is pivotted
to the walls of the passage way by a pivot pin H. It is elevated by its finger
push portion J and until it is lifted the bolt cannot be withdrawn and the window
opened.
On to the top face of the outer sash K is secured the catch bolt L. This has
through it a hole M with chamfered mouth. Pivotted by a pin P to the upper
portion of the flanges N is the front tumbling stop 0. This has at its top tho

page_text: finger push portion Q by which it is elevated though the said finger push portion
is below the top face of the said catch bolt. Its lower end engages with the lip l
on the front end of the bolt which lip as shewn is undercut.
When the bolt is withdrawn the back tumbling stop is elevated and closes the
inner end of the passage. But for the sake of appearance I may plug the said
end in which case the back tumbling stop will be dispensed with.
On the meeting edge of the carrier and above the top of the same may be a
guard rib which is slightly higher than the top of the finger push. This pre-
vents the push being forced backwardly by foul means.
The action of my fastener is as follows.-When it is necessary to lock the
window the finger push and the bolt is pressed outwardly from the person
standing within the building. The Lp R on the front end of the bolt then
passes underneath and beyond the front tumbling stop O. The bottom end of
this tumbling stop then falls down inside the lip and the bolt cannot be with-
drawn until such stop is lifted by pressing the finger upon the finger push
portion of it. As an additional precaution the back tumbling stop G is pro-
vided which also falls down when the bolt is shot. Though when the windows
are required to be opened the bolt can be easily withdrawn by first lifting the
front stop and then lifting the rear one. But when both stops are down it is
an utter impossibility for the said bolt to be forced backwardly.
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
1st. An improved sash fastener consisting of a bolt carrier in which slides a
bolt having a finger push and on the front end a lip engaging with a tumbling
stop pivotted to a catch bolt all as and for the purposes herein before described
and as illustrated in the drawings.
2nd. An improved sash fastener consisting of a bolt sliding in a carrier and
into a catch and retained in the catch by a front tumbling stop engaging with
a lip and in the carrier by a back tumbling stop all as and for the purposes
hereinbefore described and as illustrated in the drawings.
3rd. An improved sash fastener consisting of a bolt with a finger push at its
top and a lip at its front end, a carrier having a slot to accommodate the finger
push and a tumbling stop with a finger push portion at its rear end, and a catch
to which is pivotted a tumbling stop all as and for the purposes herein before
described and as illustrated in the drawings.
Dated this 28th day of August 1899