IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR REGULATING FANLIGHTS
Year: 1881

page_text: LETTERS PATENT to William Leggott, of Bradford, in the County of York,
Ironmonger, for an Invention of "IMPROVEMENTS IN THE METHOD OF AND
APPARATUS FOR REGULATING FANLIGHTS."
PROVISIONAL SPECIFICATION left by the said William Leggott at the
Office of the Commissioners of Patents on the 26th March 1881.
WILLIAM LEGGOTT, of Bradford, in the County of York, Ironmonger. "IMPROVE-
MENTS IN THE METHOD OF AND APPARATUS FOR REGULATING FANLIGHTS."
This Invention has for its object the opening and closing of fan-lights by means
of a cord or chain, in combination with a mechanical appliance, in such a manner
that the fan-light can be adjusted in any position.
I accomplish my object in the following manner :-
To the top or side bar of fan-light frame I attach a bracket in which is mounted
a worm gearing into a worm wheel which is also mounted in the bracket, and on
the axis of the said worm wheel I secure a deep grooved pulley, to which is attached
a cord or chain which is also secured to the main framework of window or door;
or in place of the grooved pulley I secure a toothed pinion which gears into a
toothed rack that is attached to the main frame of door or window.
By actuating a cord in connection with a grooved pulley on the worm shaft
the fan-light is opened or closed according to the direction in which the cord is
actuated.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Leggott in the Great Seal Patent Office on the 26th
September 1881.
WILLIAM LEGGOTT, of Bradford, in the County of York, Ironmonger. "IMPROVE-
MENTS IN THE METHOD OF AND APPARATUS FOR REGULATING FANLIGHTS."
This Invention has for its object the opening and closing of fan-lights by means
of a cord or chain, in combination with a mechanical appliance arranged in such a
manner that the fan-light can be adjusted in any position according to the length
of the chain or rack fitted to the apparatus, and consists in securing to the top
bar of the fan-light a bracket in which is mounted a worm and worm wheel, and

page_text: on the spindle of the latter is secured a deep grooved pulley, in the groove of which
is attached a cord or chain. The other end of the cord or chain is secured to the
framework of the window or door; or as a substitute for the grooved pulley and
chain I secure a pinion to the worm wheel spindle which gears into a rack attached
to the frame of the door or window. By actuating the cord or chain in connection
with the grooved pulley on the worm shaft the fan-light is opened or closed as
desired.
In the accompanying Drawings Figure 1 represents a cross section through the
upper portion of the door frame, the fan-light being open and fitted with my
improved apparatus; Figure 2 is an enlarged detailed side elevation of my apparatus,
part of which is shewn in section; Figure 3 is a front view of the same, and
Figure 4 is a side elevation shewing the apparatus fitted with a pinion and
rack.
To the top or side bar of the fan-light I secure the bracket A to which is fixed a
spindle which forms the axle of the worm B, on the boss of which is secured a
grooved pulley C, around which running in the groove is the cord or chain D for
actuating the apparatus. This cord is kept in the groove of the pulley by means
of the guard E passing round the major portion of the circumference of the pulley,
and the guard is kept in position by screw F screwed into the end of axle which
also retains the grooved pulley C and worm in position on the spindle. Gearing
into worm B is wheel G carried by journals in lugs A', forming part of bracket A.
On the axle of worm wheel G is secured à deep grooved pulley H, to which is
attached chain J, the other end of which is secured to frame of door or window
by bracket M, as shewn in Figure 1; or in place of the pulley H and chain J
I can substitute a toothed pinion K gearing into a curved rack L, one end of
which is jointed to bracket M³, which is secured to the frame of door or window
as is the case when the chain J is used.
When the apparatus is fitted with rack and pinion, as shewn by Figure 4, one
of the lugs A' is made longer, and arranged so that it forms a support for the
rack L to slide in, keeping the rack in gear with pinion.
By actuating endless cord or chain D the worm and connections will revolve,
winding or unwinding the chain J on the pulley H, or if fitted with rack and
pinion, the latter travelling towards the bracket M¹, or to the opposite end of
rack, according to the direction in which the cord or chain D is pulled, thereby
opening or closing the fan-light as desired.
What I claim as my Invention is,—
The combination of the worm and worm wheel, substantially in the manner
described and for the purpose set forth.
The opening and closing of fan-lights by means of a worm and worm wheel,
substantially as set forth.
In witness whereof, I, the said William Leggott, have hereunto set my
hand and seal, this 23rd day of September, in the year of our Lord One
Witness,
JOHN WAUGH,
Engineering and Patent Offices,
Bradford.
WILLIAM LEGGOTT. (L.S.)