Improvements in Apparatus for Raising and Lowering Props of Fanlights, Skylights, and the like.
Year: 1891

page_text: Date of Application, 13th Oct., 1891
Complete Specification Left, 8th July, 1892-Accepted, 13th Aug., 1392
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Raising and Lowering Props of
Fanlights, Skylights, and the like.
1, JOSEPH LILLY of No. 6 Hutton Street, Nechells in the County of Warwick,
Art Metal Worker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus by which the supporting prop of a fanlight,
skylight or the like may be actuated for raising and lowering purposes.
I make the prop in the form of a rack passing through guiding slots in a frame
which encloses a pulley to be actuated by a cord or chain passing around the
pulley in a suitable groove made to suit a cord or chain. The grooved pulley is
formed with a convolute cam projecting from its face and engaging in the rack in
such a manner as to cause a rise or descent of the prop corresponding with the
direction in which the grooved pulley is rotated.
The grooved pulley is centrally supported upon a ball headed bracket which
may be secured by screwing in any suitable position to give support to the prop.
The frame which encloses the grooved pulley has a slot with an enlarged end
through which the ball head of the bracket passes when fitting the parts in
position but the central bore of the pulley prevents the detachment of the pulley
frame from the ball head bracket when the parts are fitted in their relative
positions. The pulley and the frame which encloses it rock upon the ball head of
the bracket to accommodate the convolute cam to the varying inclinations of the
prop during its rise and descent.
I provide a flat band spring in one of the guiding slots bearing upon the back of
the prop so as to maintain the rack in close contact with the convolute cam
without undue friction.
Dated this 13th day of October 1891.
AYRTON & THOMAS,
Agents for the Applicant
COMPLETE SPECIFICATION.
Improvements in Apparatus for Raising and Lowering Props of
Fanlights, Skylights, and the like.
I, JOSEPH LILLY, of No. 6 Hutton Street, Nechells, in the County of Warwick,
Art Metal Worker, 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 apparatus by which the supporting prop of a fanlight,
skylight or the like may be actuated for raising and lowering purposes.
I make the prop in the form of a rack passing through guiding slots in a frame
which encloses a pulley to be actuated by a cord or chain passing around the
pulley in a suitable groove made to suit a cord or chain. The grooved pulley is
formed with a convolute cam projecting from its face and engaging in the rack in
such a manner as to cause a rise or descent of the prop corresponding with the
direction in which the grooved pulley is rotated.
The grooved pulley is centrally supported upon a ball headed bracket which
may be secured by screwing in any suitable position to give support to the prop.
The frame which encloses the grooved pulley has a slot with an enlarged end
through which the ball head of the bracket passes when fitting the parts in

page_text: position but the central bore of the ¯pulley prevents the detachment of the pulley
frame from the ball head bracket when the parts are fitted in their relative
positions. The pulley and the frame which encloses it rock upon the ball head of
the bracket to accommodate the' convolute cam to the varying inclinations of the
prop during its rise and descent.
I provide a flat band spring in one of the guiding slots bearing upon the back of
the prop so as to maintain the rack in close contact with the convolute cam without
undue friction. ---14
"
...
.
--
In order to more fully explain this my invention, I have appended hereunto
illustrative sheets of drawings upon which are figures and numbers of reference,
similar numbers referring throughout the several views to, the same thing or
part.
Fig. 1, illustrates the application of this my invention to a fanlight opening
outwards (hinged at the top) and shows the fanlight opened.
Fig. 2, shows the same fanlight closed.
Fig. 3, is a plan view of the invention when the fanlight is closed,
Fig. 4, shows my invention applied to a fanlight hinged at the bottom and
opening inwards.
Fig. 5, shows the fanlight as in Fig. 4, but closed.
Fig. 6, is a plan view of Fig. 5, shown in section on line A-B.
Fig. 7, shows my invention as applied to a skylight.
Figs. 8 to 19 inclusive illustrate various detailed parts of this my invention.
I will first explain my invention as illustrated in Figs. 1, 2 & 3.
1, is the window frame, 2, is the movable light &c. hinged at 3. 4, is a bracket
secured to the fixed frame 1, and upon this bracket is carried the ball headed
projection 5, see detail Figs. 8 & 9. On to this projection 5, is passed
the frame 6, see Figs. 14 and 15, in which is formed the slot hole 7, having
an enlargement at its one end, through which the ball headed portion 5
enters and is then passed along the narrower part of the slot. In this
frame 6, are also provided the slot holes 8, 8, (see also Fig. 10) through which
the rack or prop 9 passes, as seen in Figs. 1, 2 & 3. This rack is formed
with teeth upon its one side, and is attached to bracket 10 in such a manner that it
is free to swivel in a radiating direction. Carried upon the ball head 5, of the
bracket 4, and thus lying between the frame 6, and the rack 9, see Fig. 3, 'is'the
combined grooved cord pulley' 11, see Figs. 12 & 13, having upon its face
the convolute "cam: 12; which" latter engages with the said rack. It will now be
readily seen, that upon rotating the pulley 11, by means of the cord 13, the
convolute cam 12, forces the rack 9,-up or down, in or out, as the case may be.
In so doing however the rack '9, of necessity changes its radiating line or angle
with the casement, and of course necessitates a similar change in position of the
convolute cam 12, pulley 11, and frame 6. "This as before intimated is permitted
by reason of the ball head 5, of the bracket 4, taking loosely into the central:
hole in the pulley 11, and cam 12, which permits of sufficient (range of) change of
position for the purpose required.
".
It is desirable to provide means for keeping the convolute cam 12 in close
contact with the rack 9. This of course can be effected by making those parts-
already described, sufficiently rigid and firm, but to ensure easy and smooth
working, I make such parts tolerably loose and employ a pressure spring to keep
such parts in close contact. This may be done as seen in Figs. 14 & 15 in which
case the spring 14 is secured at its centre to the frame at 15, whilst its two ends
press upon the back of the rack as seen in Fig. 6. Generally however I prefer to
put the spring between the back of the cord pulley and the frame 6, as shown in
Figs. 10, 11 & 114. In this case the pulley and cam are pressed from their rear,
forward into the rack. This effects a smoother working of the two, than the
previously described arrangement.
In reference to Figs. 4, 5 & 6, it will be seen that the various parts, and
arrangement of them is the same as those already described except the bracket 4*,
".

page_text: which is modified in shape to accommodate the different form of movable light.
In this case also, it will be noticed that the bracket 4º, with the frame 6",
pulley 11, and cam 12ª, are secured in this instance, to the movable frame 2",
while the rack 9* is secured at its end to the fixed part of the frame 1. In
working it will be seen to be practically the same as in Figs. 1, 2 & 3.
In reference to Fig. 7, it is shown as applied to a skylight. Here again, the
parts are similar as those in Figs. 1, 2, 3, 4, 5 & 6, except as to the bracket 4b,
which is as before simply changed in shape to suit change of position. In this
case however the cord hangs at right angles to the direction shown in previous
figures, but the outstanding guides 16, 16, (see Figs. 10, 11, 14 & 15) preserve its
correct position in the groove for working.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
.
1. The apparatus for opening and closing fanlights, skylights and other movable
casements in which are combined the straight rack bar 9, swivelling or rocking
combined pulley 11, and convolute cam 12, with the ball headed bracket 4. and
frame 6, all constructed and operating as described and illustrated in Figs. 1, 2 & 3,
(and detail figures).
2. The modified combination with the rack bar, combined pulley and convolute
cam, and frame, of the variously shaped ball headed brackets such as 4* or 4° to
suit the various position of the fittings and casements as herein described and
illustrated in Figs. 4, 5, 6 & 7 or similar positions.
Dated this 7th day of Jul♥ 1892
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicant's Agent.