Improvements in Stays for Casements, Fanlights, and the like..
Year: 1888

page_text: Improvements in Stays for Casements, Fanlights, and the like..
I JOHN GEORGE DUNN of 44 Waterloo Street Birmingham, in the County of
Warwick, Architect and Surveyor do hereby declare the nature of my said 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 has for its object improvements in fasteners for casements, fanlights,
and other such like purposes and is designed to lock casements, fanlights etc. in any
desired position, in a very simple and effective, and compact manner.
The fasteners now in use are complicated and not thoroughly effective.
In order that my invention may be clearly understood and easily carried into
practical effect I have appended hereunto a double sized sheet of drawings upon
which I have shown four figures illustrating both the general application of the fastener
and the details thereof and from which practical men will be able easily to adapt the
fastener to any other similar purposes.
Figure 1 shows the lower portion of a casement B hinged to the window frame,
and to which my new joint is applied.
Figure 2 is a cross section of the said joint showing the mode in which it is locked
in any required position and is specially adapted to a casement, though it might also
be used for a fanlight.
Figure 3 is a plan of the lower part, with K removed, on the dotted line 1. 2.
Figure 4 is a vertical section of a modification of the fastener, better adapted for
fanlights, though it might also be used for casements.
The arms of my fastener E and K may be formed at the centre either round, oval,
oblong or of other section and are suitably strengthened at each end thereof. The
arm finishes with a suitable knuckle joint on the pivot pin attaching it to the
plate which is fastened to the casement B. The arm E is jointed to the plate e by
the pivot e. The end boss e of the arm projects sufficiently from the under side of
the arm to enable it with the assistance of the similar projection e on the plate e² to
miss the bead C. The plate e is secured by suitable screws or other means to the
internal window ledge or sill A.
The most important part of my invention is the junction of the arms K and E.
This junction is formed by a considerable horizontal circular enlargement of the end
of the arms E and K. These enlargements and are both supplied with teeth e¹
and ** which correspond with recesses in the face of each into which they enter as

page_text: shown in the plan Figure 3 where the teeth are represented by e and the hollows
bye. The upper is formed into a knob or handle and the lower part into a neck
which passes through a suitable hole in finishing with the screw neck k upon
which the nut k fits. Between this nut and e³, is mounted the coiled or other spring k³,
this spring being in compression and thus having the constant tendency to force
together the two discs and k³. To liberate them it is only necessary to lift the
knob when the spring 8 is further compressed and the teeth and e* are drawn
sufficiently asunder to allow the casement to swing round into any desired position,
when the knob is released and the teeth at once come together thus locking the fastening
in any desired position. In the plan Figure 3 the teeth e* are shown sufficiently long
to extend to but it will be obvious that they may be made much shorter than this
the intermediate metal being chambered out so as to lighten the fastening.
In the case of a fanlight fastening I prefer to make it as shown at Figure 4 where
the enlarged part is pierced with a tapped hole to receive the screw M, which
continues through the enlargement of the arm E finishing with the collar m³.
This scrow pin M has the effect of locking the arms K and E together, so that the
fanlight cannot by any accident fall down. To operate it, it is only necessary to turn
the pin M sufficiently to bring the collar m' into the position shown by the dotted
lines when a movement of the pin M sideways will lift the teeth e* and kª asunder so
as to allow the joint to turn and the fanlight to be operated.
It will be quite obvious that though this joint is specially applicable to fanlights as
giving facilities for locking, it may also be used as a casement fastenor and that the
casement fastener shown in section by Figure 2 may also be used as a fanlight fastener
instead of Figure 4 it will also be obvious that the teeth and e' may be substituted
by pins and holes which would enter into each other in a similar way to the teeth
and though square teeth are shown either round or V teeth may be substituted therefor
so long as too much taper or curve-which would render the fastening unstable-is
avoided. The number of the teeth may also be reduced in one side as oven one tooth
or peg would answer the purpose and in such a case a disc on one side would be
sufficient with only an arm on the other side to carry the peg or tooth. Also instead
of the teeth or pegs the discs may have flat faces, or flat faces with circular, V or
other ribs like friction gear with a screw to tighton them together in any position in
which case the slightest turn of the screw would relieve or fasten the joint. In other
cases a circular slot may be made in one disc or attached to one arm and a screw
passed through and tapped into the lower one and other obvious modifications may be
made without departing from the principle hereof.
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.
The improvements in fasteners for casements, fanlights and other such like purposes
consisting of an arm K and E attached at one end to a stationary part A and at the
other end to a moving part B with a centre joint consisting of enlarged dises e³ and
having face teeth or projections thereon which lock into each other and operated either
by a spring or screw or other equivalent substantially as and for the purpose herein
set forth and shown upon the drawings.
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2009
GEORGE BARKER,
77, Colmore Row, Birmingham,
Agent for Applicant.