Year: 1886

page_text: I, HENRY JAMES TREASURE Clerk of Works, in the parish of Locksbottom in the
County of Kent, do hereby declare the nature of this invention to be as follows:-
My Invention consists of a Ventilator which when either open or closed can be
fixed in either position by means of a contrivance constructed to lock or unlock
the same at will, by the insertion of a key. I construct the perforated framework
of cast iron; with returned ends at top and bottom, to receive the sliding perforated
plate, this plate sliding in each of the returned ends. The perforated plate inserted
in the frame and the sliding plate being perforated to corrispond with each other.
In the centre of the frame is constructed a recepticle to receive the spindle, on
which the sliding plate works in a slot. The spindle being fixed by passing it
through the frame and the sliding plate; with a forked tongue, securely pined to
the spindle, the fork of the tongue being inserted between a raised surface on the
back of the sliding plate. Thus when it is required to open the ventilator, the key
is inserted into the square portion of the spindle or lock, and turned to the right,
which carries the sliding plate by means of the forked tongue acting on the raised
surface at the back, and thus the openings of both the sliding plate and frame are
placed over each other, to permit the egress of air; the key is then removed, being
impossible to close the openings, only to those who posess the key.
1000

page_text: .
Improvements in Lock-up Ventilators for Buildings.
I HENRY JAMES TREASURE Clerk of Works, of the Parish of Locksbottom in the
County of Kent, 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 consists of a Ventilator, which when either open or closed, can be
fixed in either position by means of a contrivance constructed to lock or unlock the
same at will, by the insertion of a key. I construct the perforated framework of
cast iron; with returned ends at top and bottom to receive the sliding perforated
plate, this plate sliding in each of the returned ends. The perforated plate inserted
in the frame and the sliding plate being perforated to corrispond with each other.
In the centre of the frame is constructed a receptacle to receive the spindle, on
which the sliding plate works in a slot, the spindle being fixed by passing it
through the frame and the sliding plate, with a forked tongue securely pined to
the spindle; the fork of the tongue being inserted between a log or raised surface
at the back of the sliding plate.
Thus when it is required to open the Ventilator, the key is inserted into the
square portion of the spindle or lock and turned to the right, which carries the
perforated sliding plate by means of the forked tongue acting on the lug or raised
surface constructed at the back; and thus the openings of both the sliding plate
and frame are placed over each other to: permit the egress of air; the key being
removed, it is then impossible to close the Ventilator, only to those who posess
the key.
And in order that my Invention may be thoroughly understood, I now proceed
to describe the accompanying drawings thereof, reference being had to letters and
figures marked thereon.
Figure 1. represents the front of the Ventilator open for the egress of air.
Figure 2. is the position of the slide at the back of the Ventilator when open...
Figure 3. denotes the position of the slide at the back of the Ventilator when
closed.
Figure 4 represents a section of the spindle and lock with the key inserted in
the lock. "
Tiko lottam unfam in 1:L

page_text: Having now fully described the nature and object of my Invention, and the
manner in which the same is to be performed; I claim as new the following:-
First. The combination of the perforated frame A and the perforated sliding
plate D, to be fixed open or closed by means of the spindle C, substantially herein
described and according to the accompanying drawings.
Secondly. The combination of the lock B, spindle C, working in the slot H, of
the sliding plate, with the forked tongue F, pined to the spindle C, the tongue
working on the lug or raised surface G, to open or close the ventilator, substantially
herein described and according to the accompanying drawings.
Thirdly. The combination lock B, and the spindle C, which opens or closes the
perforations in the frame A, constructed to lock or unlock; it being impossible to
open or close the ventilator, only to the person who posess the key, substantially
herein described and according to the accompanying drawings.
H. J. TREASURE
(Applicant).