Automatic Window Fastener.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Automatic Window Fastener.
I, ALBERT WASHINGTON BORLASE, of Belle Vue Terrace, Stenalees, St. Austell,
Cornwall, Carpenter, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a window fastener consisting of two parts, such that
when the lower sash is lowered or the upper sash is raised to close the window
a catch on the lower sash is engaged by a spring hook on the upper sash, thus
fastening the sashes in closed position, as I shall describe with reference to the
accompanying drawings.
Fig. 1 is a section of parts of two window sashes shewing the parts of the
fastening engaged together. Fig. 2 is a part plan.
b
On the lower sash L I fix the one part B which has a slotted part 6 projecting
over the ledge of the upper sash U. On this ledge I fix the other part C of the
fastening which has pivotted in a recess a hook lever c made with an inclined
head and urged towards the glass by a spring A.
When the lower sash is lowered or the upper sash is raised, the hook lever c
enters the slot of band is pressed backwards in opposition to the spring by the
front end of the slot of b acting on the inclined head of c.
As soon as the hook of 6 passes above the slot it is caused by the spring to shoot
forwards so that it is engaged over the part b.
C
In order to open the window the hook lever c has to be drawn back by the finger
while the one or the other of the sashes is moved out of closed position. The
part B being fixed on the lower sash by a single screw S, as shewn, can be turned
partly round this screw as an axis, so as to be out of the way of the upper sash
when automatic fastening is not required, as indicated by the dotted lines in
Fig. 2.
Dated the 16th low of Tahmom 1000
ABEL & IMRAY,
Agents for the Applicant.
I, ALBERT WASHINGTON BORLASE, of Belle Vue Terrace, Stenalees, St. Austell,
Cornwall, Carpenter, 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 relates to a window fastener consisting of two parts such that

page_text: when the lower sash is lowered or the upper sash is raised to close the window
a catch on the lower sash is engaged by a spring hook on the upper sash, thus
fastening the sashes in closed position, as I shall describe with reference to the
drawings accompanying my Provisional Specification.
Fig. 1 is a section of parts of two window sashes shewing the parts of the
fastening engaged together. Fig. 2 is a part plan.
On the lower sash L I fix the one part B which has a slotted part b projecting
over the ledge of the upper sash U. On this ledge I fix the other part C of the
fastening which has pivotted in a recess a hook lever c made with an inclined
head and urged towards the glass by a spring A.
When the lower sash is lowered or the upper sash is raised, the hook lever c
enters the slot of 6 and is pressed backwards in opposition to the spring by the
front end of the slot of 6 acting on the inclined head of c.
As soon as the hook of 6 passes above the slot it is caused by the spring to shoot
forwards so that it is engaged over the part b.
In order to open the window the hook lever c has to be drawn back by the finger
while the one or the other of the sashes is moved out of closed position. The
part B being fixed on the lower sash by a single screw S, as shewn, can be turned
partly round this screw as an axis, so as to be out of the way of the upper sash
when automatic fastening is not required, as indicated by the dotted lines in
Fig. 2.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is:-
A window fastener constructed and operating substantially as described with
reference to the drawings.