Improvements in Window-sash Fasteners.
Year: 1897

page_text: Date of Application, 10th Sept., 1897-Accepted, 16th Oct., 1897
Improvements in Window-sash Fasteners.
I, RICHARD PAVER, of Lindley, Orange Free State, South Africa, Engineer,
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 improvements in window-sash fasteners and has for its
object to lock the sashes together securely in their closed position and to prevent
the unlocking of the same from outside the window by the insertion of any
instrument between the sashes.
For this purpose my improved fastener consists of a spring locking bolt formed
with a square head or projection at its outer end for engaging with a slotted
locking plate and recess in the meeting rail of the upper sash. The locking bolt
passes through a tube fitted to the meeting-rail of the lower sash and is provided
at its inner end with a knob or handle which bears against a plate fixed to the
said meeting-rail. A coiled spring surrounds the bolt and bears at one end
against the said plate and at the other end against the head or projection at the
outer end of the bolt so as to force the same into engagement with the recess in
the outer meeting-rail. The locking bolt is kept in its drawn back or unlocked
position by means of a stop or catch pivoted to the inner meeting-rail and engaging
with the knob or handle for this purpose.
Instead of the said stop or catch the knob or handle may be mounted loosely on
the end of the locking-bolt and formed with a semicircular flange or base, the
bearing plate on the lower sash being likewise provided with a similar semi-
circular flange, the two forming a complete circular flange when the bolt is in
its locked position, but when the latter is drawn back into its unlocked position
the knob or handle is given a half-turn so as to bring its flange behind and
coincident with the fixed flange on the plate against which it bears thereby
keeping the bolt in its unlocked position.
And in order to clearly understand my said invention I will describe the same
with reference to the accompanying sheet of drawings in which Fig. 1 is a cross
section through the meeting-rails of two sashes shewing the bolt in its locked
position, Fig. 2 is a front elevation thereof and Fig. 3 a plan shewing the bolt
drawn back in its unlocked position. Fig. 4 is a front view and Fig. 5 a cross
section of portions of a modified arrangement of fastener.
In Figs. 1, 2 and 3 a is the meeting-rail of the top sash and 6 that of the
bottom sash. The sash rail b is formed with a recess
and fitted
with a tube c which carries the spring bolt d formed with a square
head or projection d the coiled spring e surrounding the said bolt and bearing at
one end against the head and at the other end against the plate f screwed to the
face of the rail, the spring thus tending to keep the bolt in its locked position.
The sash a is also formed with a recess a¹ to the front of which is fixed a slotted
plate a, a similar plate 68 being fixed to the rail b. The bolt is provided with a
knob or handle and to the plate ƒ is pivoted a stop-piece or catch g for keeping

page_text: the bolt in its unlocked position. In order to unlock the sashes the bolt is drawn
back by its knob until the head lies within the recess b¹ so as to permit the
upper sash to be lowered or the bottom one raised, the bolt being kept in this
position by turning the stop or catch g into the position shewn by dotted lines in
Fig. 2. so as to lie between the plate f and the base of the knob or handle d².
In place of the said stop or catch the knob or handle may be formed with a
semicircular flange or base has shewn in Figs. 4 and 5 and is mounted loosely on
the bolt d so as to be capable of revolving thereon. The plate has also cast upon,
or attached to it, a similar semicircular flange i so that when the said flanges are
brought together in the locked position of the bolt as shewn in Fig. 4 they form
a complete circular flange. When the bolt is drawn back for unlocking the sashes
the knob is given a half turn so as to bring the flange behind and coincident
with the flange i, the flange h thus bearing against the flange i, as shewn in Fig. 5,
and keeping the bolt in its drawn-back or unlocked position.
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. A window sash fastener comprising a spring locking bolt fitted within a
tube or passage in the meeting-rail of the lower sash and formed with a square
head or projection arranged so as to engage with a recess in the meeting-rail of
the upper sash for locking the sashes together, the bolt being kept back in its
unlocked position by turning a pivoted stop or catch into position between its
knob or handle and the inner side of the lower sash substantially as described.
2. In window sash fasteners the combination with the upper and lower meeting
rails a and b of the recesses a¹, b', plates a, b, tube c bolt d formed with au
head knob or handle coiled spring e, plate f and pivoted stop or catchy,
arranged and operating substantially as described and for the purposes specified.
3. In window sash fasteners as herein described the combination with the
spring bolt d and knob or handle of the semicircular flange h formed on the
latter and the semicircular flange i formed on or attached to the plate f sub-
stantially as described and shewn in Figs. 4 and 5 of the drawings.
4. The improved window sash fastener substantially as described and shewn in
the accompanying drawings.
Dated this 7th day of Sentember 1907
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.