Improvements in Window Fastenings.
Year: 1889

page_text: Date of Application, 29th May, 1889
Complete Specification Left, 28th Feb., 1890-Accepted, 19th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Window Fastenings.
I, EDWARD HANFF, of 29, Shepherdess Walk, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows :-
My invention relates to that class of fastenings applicable to windows and shutters
and has for its objects
--
1stly. The arrangement and construction of a fastening which shall be more reliable
and secure than the majority of fastenings now in use, and shall provide means for
the fastening of a window when at different degrees of opening, so that the window
may be left open two, three or four inches without any risk of a person opening the
window any further in order to enter the room;
2ndly. Perfect immunity from any attempt to operate the catch from the outside by
means of a knife blade or other instrument as can be at present done in many
catches.
My invention consists in fixing upon the upper ledge of the lower sash at the side,
a frame having two side cheeks, and between these said cheeks pivot a spring
pressed or weighted catch or pawl in such a manner that the upper end of the pawl
shall engage with a plate which is fixed on to one of the upright side frames of the top
sash. This plate has arranged upon the face of it a series of recesses into which the
said pawl engages, the pawl being pressed against the plate by means of a spring or
weight. When the pawl has engaged in any one of the recesses in the plate it can
be locked in place by a pin being inserted through a hole in the one side cheek and
thence through a corresponding hole in the pawl to the other side cheek, so that any
attempt at withdrawing the pawl from the recesses in the plate would be futile until
such pin had been with-drawn from the aforesaid hole. The hole in the pawl is only
opposite the hole in each cheek when the pawl is in the fastened position. The upper
nose of the pawl, where it engages with the plate, has its under side arranged with a
face slanting from the inside to the outside in a downward direction, so that any
attempt at operating the pawl by inserting a knife blade between the sashes from the
outside would tend to force the pawl into the recess in the plate instead of with-
drawing it.
It will be readily understood that should the window be left with either the top or
bottom sash a little open and the spring pressed pawl engaged in one of the recesses,
the two sashes could only be moved bodily one with the other, or the one sash could
be pushed into the closed position in which position it would be retained by the pawl
automatically engaging in one of the aforesaid recesses. The operation of the pawl
for releasing the window sashes may be effected by a thumb piece fixed thereto which
can be depressed against the spring pressure by the hand.
D
01
1000
FELL & WILDING,
Per R. W. James,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Window Fastenings.
I, EDWARD HANFF late of 29 Shepherdess Walk, but now of 34 Penton Street,
both in the County of Middlesex, Engineer do hereby declare the nature of my
invention to be particularly described and ascertained in and by the following
statement :-
My invention relates to a class of fasteners applicable to windows and shutters, and
has for its object the arrangement and construction of the fastener which is more
reliable and secure than the majority of fasteners now used and which provides means
for the fastening of a window at different degrees of opening so that the window may
be left open two, three, or four inches, or any other distance as may be required
without any risk of a person opening the window any further from the outside in
order to enter the room; also complete safety is ensured from any attempt to operate
the catch from the outside by means of a knife blade, or other instrument as can be
at present done in many catches.
In order that my invention may be the better understood I now proceed to describe
the same in relation to the drawings hereunto annexed, reference being had to the
letters and figures marked thereon. Like letters refer to like parts in the various
figures:
Figure 1 is a view of a window having two sliding sashes with my improved
fastener fixed thereto.
Figure 2 is an enlarged side view of my fastener attached to a window sash.
Figure 3 is a front view of the same.
My invention consists in fixing upon the sash A (preferably at the side) a frame a
of metal or other suitable material having two cheeks bb and between these said
cheeks I pivot a spring pressed or weighted catch, or pawl B in such a manner that
the upper end of the pawl B shall engage with a plate C which is fixed to one of the
upright side frames of the top sash D.
This plate has arranged upon its face a series of recesses c into any one of which
the said pawl B engages, the latter being pressed into such recesses by means of a
spring Gor weight.
When the pawl B has engaged into any one of the recesses in the plate, it can be
locked in position by a pin E, which can be inserted through a hole & in one of the
side cheeks and thence through a corresponding hole in the pawl to the other side
cheek 6 so that any attempt to withdraw the pawl from the recess in the plate in
which it is engaged would be futile until such pin had been withdrawn from the
aforesaid hole.
The hole in the pawl is only opposite to the hole d in the cheek when the pawl is
in the fastened position.
In order to render my attempt at operating the pawl by inserting a knife blade
between the sashes from the outside futile, I make the upper nose e of the pawl B
where it engages with the blade C, with its under side having a face slanting from
the inside to the outside in a downward direction so that any pressure upwards would
tend to force the pawl into the recess in the plate instead of withdrawing the
same.
It will be readily understood should the window be left with either the top or
bottom sash a little open and the spring pressed bolt engaged in one of the recesses,
the two sashes could only be moved bodily one with the other, or if the sashes be
pushed into this closed position, this position would be retained by the pawl
automatically engaging in one of the aforesaid recesses.
The operation of the pawl for releasing the window sashes is conveniently effected
by the thumb pieces F fixed thereto which can be depressed against the spring
pressure by the hand.

page_text: When the window is to be thrown wide open, I may also arrange a second hole
through the pawl, so that by inserting the pin through the cheeks and the second hole,
the pawl may be retained in its non-engaging position.
When only one window sash or shutter is used, I prefer to fix the serrated plate
upon the fixed frame.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
1st. An improved window or shutter fastening consisting of a spring pressed or
weighted pivotted pawl supported on one sash, the said pawl engaging into recesses
in a plate upon the other sash or the frame of the window, substantially as and for
the purposes described.
2nd. In such an improved window or shutter fastening a pawl having a throat
with a receding face in a direction away from the axis of the said pawl so that a
vertical upward thrust tends to further engage the pawl into the recessed, plate than
otherwise, substantially as and for the purposes described.
Dated this 28th day of February 1890.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.