IMPROVED STAY FOR ADJUSTING THE OPENING OF FANLIGHTS HINGED EITHER AT TOP OR BOTTOM
Year: 1884

page_text: I; CHARLES WILLIAM.. OSMASTON Ironmonger of Beaumont Villa Harbutt
Road New Wandsworth S.W. do hereby declare the nature of my Invention for
IMPROVED STAY FOR ADJUSTING THE OPENING OF FANLIGHTS HINGED EITHER
AT TOP OR BOTTOM to be as follows:-
10
Two plates of metal each 11"x", one 10" long, the other 84" long, aranged
to slide one over the other as shown in sketeli, by being, fixed, together with stud
and bevilled slot C. D. each having the slot H; the said slot being about longer
in plate A than in B and each plate having the five notches G at equal distances,
the plate F being 1" "x" is fixed to plate A by a stud sufficiently loose to
allow it to work as a pivot with a washer or circular plate " thick and " dia
intervening, the plate E being the same size as F has a stud fixed with thin flat
head, so that when plate F is fixed to the frame of the Fanlight (in the rebate)
Fig 1. and plate E is fixed to the edge of the Fanlight at the required distance from
plate F when the Fanlight is closed, the stud E slides in the slot H when the
Fanlight is opened all the notches G being closed until the Fanlight is opened to
the full extent when the plate B slides over the plate A opening all the notches G
in which the stud E catches when the Fanlight is closed to the required point as
it slides along the slot H until it reaches the other end of slot H as the Fanlight
closes home, closing all the notches G.
When "the slide" Fanlight Stay is required for Lights opening in or outwards
and hinged at the top the notches G are sloping the opposite way, Fig 2.

page_text: I CHARLES WILLIAM OSMASTON Ironmonger of Beaumont Villa Harbutt Road
New Wandsworth S.W. Surrey, do hereby declare the nature of my invention for
IMPROVED STAY FOR ADJUSTING THE OPENING OF FANLIGHTS HINGED EITHER AT
TOP OR BOTTOM and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The object of my invention is to facilitate the adjustment of opening of windows
which are situated out of reach of the hand of a person in the ordinary way that
is to say which require the use of a pair of steps, a ladder, a "longarın" or other
aid, and which are generally known under the denomination of "fan-lights."
The "fanlights" are either swung from or near to the top or bottom thereof on
hinges or centres of motion and have a preponderance of weight causing them to
have a tendency to fall to or from their open or closed positions according as
they are hung and by the use of this invention I am enabled to dispense with cords
where such are undesirable and to effect the opening of the window or light to the
desired extent by the simple movement of lowering the closed window or raising
it from its closed position as the case may be, to its fullest extent of opening and
then reclosing it to such extent as is desired it should rest at, and without other
manipulation it will remain in that position.
In order to effect this I employ two plates or slotted arms of compound con-
struction disposed one on each side of the window in the case of a very heavy
window or for lighter ones the use of one such appliance will suffice.
Each slotted compound arm is according to my invention composed of two metal
plates, marked respectively A and B in the drawings, and each plate is slotted
longitudinally as at H and diagonally at intervals are other slots G. The plate A
is secured to the plate B with a limited extent of sliding longitudinal traverse the
one on the other, by means of studs or connections C on the one plate working in
bevelled or recessed slots D or grooves in the other plate.
The one
The end of the one plate is secured by hinging or centering to the window frame
at F so as to be capable freely of swinging thereon in the movement of the window.
E is a stud or projecting piece carrying a suitable head adapted to retain the stud E
which is secured to the window M, in the slot H of the compound arm.
leaf or plate A has its slot H longer by (say) half an inch than the corresponding
slot H of the other leaf or plate B, or so much longer, that at the one extremity of
the sliding motion longitudinally of those two leaves or plates the side or diagonal
slots G may be coincident and free for the stud E to pass therein and at the other
extremity of that motion the slots G may be closed by their alternating with the
solid portions of the other plate or leaf. Suitable plates or washers W are pro-
vided between the head of the stud E and the plates to reduce frictional wear and
yet ensure sufficient holding between those plates to maintain them in position
aided by the studs C.
In Figure 1 is shewn the arrangement of the parts when applied to a window
opening upon a centre at the lower end thereof and Figure 2 shews the stay or
compound arm separately by side and edge views,

page_text: In Figure 3 is shewn a modification of the parts when adapted to the circum-
stances of a window opening upon a centre at the upper part thereof and Figures 4
shew like views to those of the preceding arrangement of stay separately.
The operation of the stay is as follows: the hinged end having been secured in
the rebate of the window frame at F the stud E is secured to the window edge at
a point adjusted so that it shall press the one leaf B of the stay home upon the
other leaf or plate A so that the notches G are blocked against entrance of the
stud E and the stay is caused to pass in between the window and its frame into a
space provided for that purpose upon the window being closed and then the window
being opened the stud E rides over the slots G until it comes in contact with the
end of the shorter slot of the plate or leaf B and moving that plate end wise, it
opens the slots G or brings them coincident, so that the window being again partly
closed to the desired extent the stud E may pass into the notch G at that point
and the weight of the window will serve to hold it there.
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. The arrangement or combination of parts forming an improved stay for
adjusting the extent of opening of the descriptions of windows known
'fanlights" hinged either at top or bottom, substantially as set forth.
as
2. I claim the use in stays for adjusting the opening of those descriptions of
windows known as "fanlights" hinged at top or bottom of two sliding plates A, B,
having slots therein longitudinally of different lengths constructed or arranged
and operating as described and illustrated by Figures 1, 2, 3, and 4 of the
accompanying drawings.