Year: 1888

page_text: Date of Application, 15th Mar., 1888
Complete Specification Left, 1st Oct., 1888
Complete Specification Accepted, 16th Nov., 1888
1, THOMAS DYKES, of 65 West Regent Street, Glasgow, Lanarkshire N.B.,
Architect do hereby declare the nature of this invention to be as follows:-
My present invention has for its object the production of an improved sash-
fastener, having as part thereof, and as constituting the essential feature of novelty
in the invention, a pivoted or fulcrumed cant or shunt, which shall be made in such
manner as to automatically lock itself under the practical application and use, as
such, of the sash-fastener with which it is combined.
In sash-fasteners adopted for thus combining the self-locking cant of my invention,
I in general retain the common and customary pivoted radial arm or bar, actuated by
a spring, working horizontally from the frame or box, attached to the one sash of
window, and arranged to travel across, either over a suitably shaped quadrant,
or else under an overhung corresponding -shaped form attached to the other sash
at the window countercheck or meeting-rail.
Instead however of, and as a distinct improvement in point of practical value and
utility upon any merely locking knob, or, otherwise, of any style of knob whatever,
which in itself is essentially a knob or handle and nothing more, 1 substitute a
construction and form (jointing same to the extremity of the aforementioned pivoted
radial arm or bar by such means as a pivot hinge or fulcrum) which at one and the
same time constitutes and conveniently serves the purposes of a projecting part for
being laid hold of to work the fastener, a means of automatically locking or securing
the said fastener-bar or arm to the aforesaid quadrant or corresponding overhung
-shaped form, and a cant or shunt for the practical purpose of guiding the
window blind past the countercheck or meeting-rail of the upper and lower window
sashes.
This automatically locking cant may be of any appropriate contour and pattern-
plain or ornamental as desired-and will be fulcrumed or hinged to, and overhang
the travelling arm or bar of the fastener in such manner as to permit said cant to rise
and fall to an agreed on extent, and, upon its hinge or fulcrum, to, in consequence of
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page_text: its gravity, normally tend to drop in a requisite degree toward the centreing pivot
pin that attaches the opposite extremity of the radial horizontal bar or arm to the
frame or box of the fastener secured to the one particular sash of window counter-
check. A suitably made tongue, or a stud portion, attached to and preferably
formed of a piece with, this hinged cant portion, works vertically in such degree and
manner as to become raised or lowered--as the case requires-through its being
brought into contact with the aforementioned quadrant, or, otherwise, corresponding
overhung -shaped part which at its soleplate is secured to the window sashi.
This quadrant, or analogous -shaped part of the fastener while suitably bevilled in
order to its raising the tongue or the stud upon the fulcrumed cant portion, is
provided with a checked out notch or open-end slot, so situated that the said tongue
or the stud of the fulcrumed and overhung cant portion shall, when the fastener is
used and opened out, be thus first raised sufficiently and thereafter, when brought
coincident with it, shall normally drop into the aforesaid notch or open-end slot of
the quadrant or corresponding part; thereby locking or securing to it the fastener
bar or arm aforesaid.
As a detail, precaution may, in certain fasteners, be taken, where theso abut each
other, to shape the edges of the soleplates of fastener in such manner as to prevent
the locking cant being tampered with from the outside by such means
instrument inserted for that purpose between the window sashes at the countercheck.
Dated this 14th day of March 1888.
as an

page_text: COMPLETE SPECIFICATION.
Improvements in Sash-fasteners.
I THOMAS DYKES of 65 West Regent Street Glasgow Lanarkshire Architect
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 and by reference being had to the accompanying sheet of drawings and to
the figures and letters marked thereon that is to say:
My present invention has for its object the production of an improved sash-fastener
having as part thereof and as constituting the essential feature of novelty in the
invention a hinged or fulcrumed cant or shunt portion which shall be made in such
manner as to automatically lock itself under the practical application and use as such
of the sash-fastener with which it is combined.
In sash-fasteners made in accordance with my invention instead of and as an
improvement in point of practical value and utility upon any merely locking knob or
otherwise of any style of knob or handle which in itself is essentially a knob or handle
and nothing more I substitute a construction and form a part which shall constitute
and conveniently serve the combined purposes of a projecting part to lay hold of in
working the fastener-a means of automatically locking or securing the sash-fastener
bar or arm and a cant or shunt for the practical purpose of guiding the window blind
past the countercheck or meeting-rail of the upper and lower window sashes.
In order that my said invention may be more fully understood I hereto append a
sheet of illustrative drawings having the same reference letters applied to corresponding
parts in the several figures shewn and in which :-
Fig. 1 shews a view of my improved sash-fastener as partially closed and applied to
secure together the outer and inner window sashes.
(A) shews a box or frame of ordinary description secured at its soleplate to the
outer window sash and having an arm or bar (a) pivoted or hinged to it and actuated
by a spring within the box-all as in certain common forms of fasteners.
(B) shews an ordinary form of plate attached as usual to the inner window-sash
and having an overhung shaped part (6) under which the aforesaid bar or arm (a)
is made to travel the said part (6) baving a notch or open-end slot (c) formed in it
to receive the hereinafter described tongue or stud upon the aforementioned locking
cant or shunt.
(C) shews the essential feature of my invention via self-locking cant or shunt
form.
This cant or shunt part (C) which may be of any appropriate contour and pattern
plain or ornamental-is fulcrumed or hinged to the arm (a) of the fastener in any
suitable manner which will permit the said cant or shunt form (C) to rise or fall to an
agreed on extent-preferably by means of a pin (p) as shewn.
The cant or shunt (C) is so fulcrumed and overweighted as in consequence to
normally tend (in obviation of the use of any form of spring for that purpose) to drop
in a requisite degree toward the fastener bar or arm (a) to which it is attached as

page_text: aforesaid. A suitably shaped tongue or stud portion (t) upon the cant or shunt (C)
is so placed as to fit and drop into the aforesaid notch or open-end slot (c) when the
arm or bar (a) of the fastener is caused to travel under the herein before described
overhung shaped part (b) the said part (6) being shaped and bevilled in such
manner as to come in contact with and to raise in a necessary degree the aforesaid
tongue or stud portion (t) of the cant and also by consequence the cant (C) as
a whole.
Upon the arm or bar (a) being opened out sufficiently the aforesaid tongue or stud
portion () will drop into the open-ond slot or notch (e) when it becomes co-incident.
therewith and thus lock or secure the arm or bar (a) of the fastener to the overhung
shaped part (6) which is attached to the inner sash of the window.
In laying hold of the cant or shunt (C) to undo the fastener the cant will como
toward the operator sufficiently to thereby relieve the locking tongue or stud (t)
and readily allow of the bar or arm (a) being opened backwards to the necessary
extent.
Fig. 2 shews the same fastener as that illustrated at Fig. 1 but as closed and fully
applied to secure together the outer & inner sashes of the window.
In order to prevent the locking cant from being tampered with from the outside by
such means as a knife inserted betwixt the window sashes I may overlap the soleplates
of the fastener or otherwise I may for the like object adopt any other means or
constructional device in ordinary use and common to all which shall prove appropriate
and effective for the said purpose.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is
1st. The improvements in combination cant and bar self-locking sash-fasteners
substantially as herein described and illustrated.
2nd. The construction of a window sash-fastener wherein an automatically locking
hinged or fulcrumned cant form is combined with the arm which passes across to
secure together the window sashes substantially as and for the purposes herein set
forth.
3rd. An improved self-locking sash-fastener having as its distinguishing feature of
novelty and utility a cant or shunt form hinged or fulcrumed to the fastener bar or
arm said cant or shunt form being such and so constructed as to serve the combined
purposes of a convenient part for grasping in operating the fastener-a means of
automatically locking the fastener bar or arm and a shunt for guiding the window
blind past the countercheck or meeting rail of the window sashes: all substantially as
herein described & illustrated.
Dated this 20th day of Santamber 1904