Year: 1886

page_text: We SAMUEL PARDOE of 90 High Road Kilburn in the county of Middlesex
Ironmonger and FREDERICK JAMES BIGGS of Leadenhall Buildings in the city
of London Hardware Merchant do hereby declare the nature of this invention
to be as follows:-
This invention relates to an improved sash fastener and is designed to construct
such for the purpose of preventing nefarious attempts to open sashes secured by
the same being successful.
We so arrange the hook plate and latch plate attached to either sash that their
edges so meet, overlap or intersect as to form a covered joint. We prefer to do
this by fitting a channel piece of suitable length on one plate and a tongue or rib
of suitable length on the other plate and in this case we bevel or curve the under-
side of the latch so as to ride easily over the end of the channel piece and yet bind
thereon when it comes in contact, or into engagement, with the hook or stop, thus
being (when shot home) prevented from oscillating between the hook and channel
and so preventing the sashes from rattling.
When the latch is locked the covered joint prevents a knife or other instrument
from being inserted so as to push back the latch and release the sash or sashes.
Dated this 23rd day of February 1886.

page_text: We SAMUEL PARDOE of 90 High Road Kilburn in the county of Middlesex,
Ironmonger and FREDERICK JAMES BIGGS of Leadenhall Buildings in the city of
London Hardware Merchant do hereby declare the nature of the above invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
The invention relates to an improved sash fastener devised to prevent the success
of nefarious attempts to open windows and also to lessen the possibility of such
windows rattling after the latch of the said fastener has been secured.
In the accompanying drawing
3
Fig: 1. is a plan of our sash-fastener shewing the latch closed.
Fig. 2. an end elevation of same.
Fig. 3. a front elevation shewing the latch open.
A. A¹ are the meeting rails or bars of the sashes. B is a plate secured to A. by
screws or otherwise; C is the pivot thereon of the latch D the arm of the latch
engaging with a spring E in the ordinary manner; F is a rib on B projecting
upwards G is a plate secured to the other rail or bar A¹ and having at its edge a
channel piece H into which the rib F on plate B projects when the rails or bars
meet, or we could place the channel piece H on the plate B and the rib F on the
plate G.
އ
On plate G is hook I and we prefer to slightly slope and round the underside of
the same so as to admit of the more facile engagement or disengagement of the
latch D therewith. We so apportion the heighth of the channel piece H and slope
or taper the underside of the latch D that when the latch is locked into the hook I
it shall bear tightly on the channel piece H and also on the underside of the hook I
thus wedging all together by reason of the tapering of the underside of the latch
and the sloping or rounding of the underside of the hook I.
A bevelled stop J on the latch D can also assist in keeping the parts together
and it also limits the play of latch D.
As clearly seen in Fig. 2. when the meeting rails A. A¹ are together it is
impossible to insert a knife or other instrument between plates B. G. and so push
back the latch D and open the window, it will also be seen that the latch bearing
firmly on the channel piece H and hook I prevents the sashes from being rattled by
the wind or other cause of vibration.
The plates B. G. with the rib and channel piece may be of any desired length in
fact they may if required extend the whole length of the sash and so tend to
exclude or decrease draughts.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed; we declare that what
we claim is
First. A channel piece H formed on a plate secured to the meeting rail or bar of
one sash to engage with a rib F formed on a plate secured to the meeting rail or

page_text: bar of the other sash so as to prevent a knife or other instrument being successfully
inserted between the rails so as to push back the latch securing the sashes as
described.
Secondly. In combination with the channel piece H engaging with the rib F the
tapering latch D arranged to bear tightly on the channel piece H and the hook I
when the latch is locked and so prevent rattling as described.
POPPLEWELL, COLTON & Co.,
Agents for the Applicants.