An Improved Window-sash Fastener.
Year: 1897

page_text: An Improved Window-sash Fastener.
I, WALTER SPENCER CRASTER, Gentleman, of Craster Tower, Lesbury, North-
umberland, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved window-sash fastener which upon the
window being shut will automatically lock, so that it cannot be opened from the
outside and which will prevent rattling of the sashes.
For this purpose I provide a bolt passing through an outer and an inner boss
carried by a plate fixed to the meeting-rail of the lower sash. The inner boss is
fitted with a spiral spring encircling the bolt for keeping the latter in its locked
position, and the outer end of the bolt is formed with a loop for engaging with a
catch fixed to the meeting-rail of the upper sash.
Between the said bosses the sliding bolt is provided with an eccentric fitted with
a handle for operating the same. Upon turning the eccentric so as to cause its
periphery to bear against the inner boss the bolt is forced outwards thus dis-
engaging the loop at its end from the catch on the upper sash and unlocking the
window. Upon turning the eccentric back again the bolt is freed and drawn back
by the spiral spring.
When the lower sash is pushed down into its closed position or the upper one raised
the loop on the bolt passes over an inclined part of the catch so as to cause it to be
automatically locked. The bolt may be still further secured in its locked position
by turning the eccentric so as to bring its point of greatest eccentricity into contact
with the outer boss or support of the bolt. Instead of providing the bolt with a
spiral spring it may be fitted with a flat spring passing through a recess in the
bolt and bearing at each end against two fixed pins.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.
I, WALTER SPENCER CRASTER, Gentleman, of Craster Tower, Lesbury, North-
umberland, 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: -
-
This invention relates to an improved window sash fastener, which will enable
the sashes to be locked together automatically on closing, and which will prevent
any danger of the window being opened from the outside and also prevent rattling.
Price Sd

page_text: A cam or
I propose to employ a bolt fitted to the meeting rail of the lower sash, and adapted
to slide a short distance in guides or bosses formed on the fixed plate carrying the
bolt. The end of the bolt extends over the other meeting rail, and is slotted so
as to engage with a hook shaped catch on the second meeting rail.
eccentric is provided fitted to the bolt, which by bearing against one of the bosses
or guides secures the end of the bolt in the catch and prevents it being tampered
with from the outside, at the same time drawing the sashes tightly together.
In order that the invention may be more clearly understood, reference is had to
the accompanying drawings, in which Fig. 1 is a side elevation of the fastener,
Fig. 2 is a plan of the same, and Figs. 3 and are detail views showing a slightly
modified arrangement.
A is the fixed plate screwed on top of the meeting rail B belonging to the lower
sash. This plate is provided with the bosses a and a¹ respectively at the front
and back. These bosses are perforated to allow the sliding bolt C to pass, and in
the hole of the boss a¹ a spiral spring D is placed fitting around the end of the bolt,
which is preferably circular at its extremity. The collar c is provided at the end
against which the spring D bears. The boss a is provided with the lip a² at the
front projecting over the top of the bolt.
The bolt C is preferably enlarged at its front end and is provided with the slot c²,
the rear end of which is made slanting as shown in Fig. 1. This looped end is
adapted to pass over the hook shaped catch E carried by the fixed plate e which is
screwed to the meeting rail B'. This catch is provided with sloping sides and
when the meeting rails are brought together, the slotted end of the bolt meets the
top of the catch, which projects through the slot and owing to the sloping sides
draws the bolt forward against the spring D. When the sashes are fully closed,
the bolt passes under the hooked part of the catch, and the spring at once draws
it back so that it engages under the nose e. The windows cannot be opened until
the bolt is pushed forward, so as to clear the nose e¹.
To secure the fastening more efficiently the cam F is provided pivoted to the
bolt C and fitted on top of it. This cam is provided with the handle or finger
piece by which it can be operated. When the fastening is to be secured the cam
or eccentric is turned round into the dotted position shown in Fig. 2 so that the
When in this
part of greater eccentricity is caused to bear against the boss a.
position the meeting rails B and B are drawn firmly together and the bolt pulled
back as far as possible against the catch E. The bolt cannot be withdrawn or
moved in any way until the eccentric has been turned so as to release it. The
eccentric or cam may also be used to release the bolt from the catch by turning it
round to bear against the boss a¹ pulling forward the bolt until it is clear of
the catch.
In the modification shown in Figs. 3 and 4, in place of the spiral spring D the
flat spring D¹ is employed. This is carried by the pins d fitted to the plate A and
extends through the groove C2 in the lower side of the bolt. This arrangement is
less expensive than the other, but serves the same purpose, that of pulling back the
bolt so as to engage with the catch.
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) In a fastening for windows, the combination with a sliding bolt carried by
a fixed plate on one of the meeting rails, a spring connected with the bolt, a slot
or loop at the end of the bolt, and a catch on the other meeting rail adapted to
engage with the loop, of an eccentric carried by the bolt and a boss or projection
on the fixed plate against which the eccentric can bear securing the bolt in locking
position, substantially as and for the purposes specified.
(2) In an automatic sash fastening for windows, the combination with a fixed
plate on the meeting rail of the lower sash, two bosses on the fixed plate, perfora

page_text: tions or holes in the said bosses, a sliding bolt passing through the said holes, a
slot or loop at the end of the bolt, and a spring connected to it, of a hooked catch
carried by the second meeting rail adapted to engage with the end of the bolt and
a cam or eccentric carried by the bolt arranged to bear against one of the said
bosses, and to secure the bolt in locking position, substantially as described and
for the purposes specified.
(3) The improved fastening for windows, consisting of a sliding bolt slotted at
its end, a fixed plate having bosses carrying the said rod, a spring connected to
the bolt, a catch adapted to engage in the slot of the bolt, and a cam or eccentric
securing the bolt in locking position, all constructed substantially as described and
shown in the accompanying drawings and for the purposes specified.
Dated this 25th day of February 1898
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.