Improvements in the Construction or Arrangement of Apparatus for Working Punkahs.
Year: 1888

page_text: Date of Application, 10th Aug., 1888
Complete Specification Left, 20th Apr., 1859
Complete Specification Accepted, 25th May, 1839
PROVISIONAL SPECIFICATION.
Improvements in the Construction or Arrangement of Apparatus for
Working Punkahs.
We SAMUEL ROBERT BAILDON, of 1 Whitefriars Street, and JAMES KERSHAW, of
97 Wood Street, City of London, Gentlemen, do hereby declare the nature of this
invention to be as follows:-
This invention relates to apparatus for working or "pulling" Punkahs automatically
in substitution of hand labour.
For the purpose of our invention, we connect the Punkah by a rod or other means
to a disc or wheel having a band or strap pulley on its axis from which a driving
band is led to the last of a series of gear or multiplying wheels mounted on a frame
and supported by standards. The gear or multiplying wheels are set in motion by
the descent of a weight attached to a cord wound upon a barrel by a crank handle
or other means, the barrel having a toothed wheel on its axis for engaging with the
first of the series of gear or multiplying wheels. In some cases we may employ
several of these barrels to actuate the mechanism, and they may be provided with
means for throwing into or out of gear to facilitate the process of winding up the
weight or weights.
We also fit a stop appliance on the spindle of the last gear wheel or other part
of the apparatus and a fly or vane for governing or controlling the speed of the
motion.
H. GARDNER,
166, Fleet Street, London,
Agent for the said S. R. Baildon and
J. Kershaw.

page_text: Improvements in the Construction or Arrangement of Apparatus for
Working Punkahs.
We SAMUEL ROBERT BAILDON of 1 Whitefriars Street, and JAMES KERSHAW of
97 Wood Street, City of London, Gentlemen do hereby declare the nature of our
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 relates to apparatus for working or "pulling " Punkahs automatically
in substitution of hand labour.
Our invention is shown on the annexed drawings in which at Figures 1 and 2 we
show a train of wheels fitted within a box A which take their motion from -spring
barrels B when wound up in the usual way of clock or like gearing, the last arbor of
the train of wheels passes through to the outside of the casing A and carries a disc C
having a series of holes D either of which can be used as a centre for placing on
the arbor to regulate the throw of the socket E and so determine the throw of an
arm F which as the disc rotates is caused to move to and fro over the arc of a circle
as indicated by the dotted lines Figure 3 the arm F being returnable to its first.
position under control of the balance weight I.
If a Punkah cord be connected to the extreme end of the arm F as at Figure 4
the Punkah G will be caused to vibrate and so disturb the air within the room and
keep the apartment cool.
According to Figure 4 the Punkah is suspended from a rod H or by cords for
vibration but at Figure 5 we show the punkah suspended from about mid-distance of
its depth and is moved over the arc of a circle by the cord J the extreme ends of
which are attached to discs Con either side of the box A so that as the discs travel
round they alternately pull on the ends of the cord J which pass over the rollers K
and vibrate the Punkah G. The arm F may be arranged horizontally as at F¹
Figure 4, if desired.
Figure 6 shows a rotating punkah G this being moved by the cords J, J, which
pass over the rollers K K and operated continuously in the same direction from the
disc C.
:
The speed at which the Punkah may be made to vibrate or rotate is governed by a
pair of wheels seen at Figures 1 and 2 which can be thrown into and out of action by
the handle L the two wheels being of different diameters for transferring the motion
to the pinion on the spindle which carries the disc according to the degree of rapidity
with which the Punkabs are required to act.
Instead of fitting the gear barrels B, B, with springs, we can by cords and suspension
weights give motion to the train-of-wheels.
We purpose fixing two barrels B, B, in the casing A and arrange one of the barrels
with a short threaded screw so that after said barrel has rotated a fixed number of
turns, it has moved along the screw and thrown itself out of action, the other barrel
by the same means having thrown itself into action for continuing the motion of the
Punkah.

page_text: A train of gearing made as before described can when wound up give motion to
the Punkah for 5 or 6 hours or even more, before the spring barrels or cord barrels
are required.to be wound up afresh.
We are aware that Punkahs have been moved by gearing and we make no claim to
the use of gearing for the purpose except when arranged in the manner shown on
the accompanying drawings.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :--
The particular arrangement of appliances hereinbefore described and shown on the
annexed drawings for the purpose of working Punkahs or ventilating fans as set
forth.
The 20th day of April 1889.
H. GARDNER,
166, Fleet Street, London,
Agent for the said S. R. Baildon and
J. Kershaw.