Improvements connected with Actuating Punkahs.
Year: 1892

page_text: Date of Application, 17th May, 1892
Complete Specification Left, 17th Feb., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with Actuating Punkahs.
We LEWIS WILLIAM SHEDDEN of Graigwen Gentleman and WILLIAM
GEARY YEATMAN Watchmaker both of Lymington Hampshire do hereby declare
the nature of this invention to be as follows:-
The salient features of this invention refers to counterpoising the punkah and
parts at all positions thereby only requiring a minimum of power to work it and
giving it the jerk when starting obtained by hand worked ones.
The punkah curtain is suspended upon a light frame in the usual way and is.
attached to a rocking shaft by rods connected to frame and passing into tubes
connected to the rocking shaft. The top of rods is attached to a cord passing
through tubes and over pulleys along the rocking shaft; at the outer end of which
is a vertical arm carrying a sliding weight to which the cords are attached by this
means the weight of punkah is counterbalanced so that it may be drawn down or
pushed up retaining any position in which it is placed. The shifting weight also.
counterbalances the punkah in its movements. The rocking shaft is actuated by
weight appliance operating a train of wheels. The arbor of the wheels which
actuates the rocking shaft projects beyond the frame of the wheels and is fitted
with a crank lever and connecting rod to connect it to the crank of rocking shaft.
this crank lever is also counterpoised by weight.
A fly of usual construction is used to regulate the speed.
FREDERIC PRINCE,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements connected with Actuating Punkahs.
We LEWIS WILLIAM SHEDDEN, Gentleman and WILLIAM GEARY YEATMAN
Watch-maker both of Lymington, Hampshire, 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 improvements in actuating punkahs by weight and will -
be best understood by describing the same with aid of the accompanying drawings.
Figure 1 is a front elevation of punkah fitted in room according to this invention.
Figure 2 view of outside of house showing punkah actuating mechanism.
Figures 3, 4, 5 and 6 views of detached parts embodied in Figures 1 and 2.
Figure 7 plan of punkah actuating mechanism.
Figure 8 front view of form of arm Jo.
A is walls of room A' the ceiling A³ the floor. B the punkah curtain suspended
upon a frame in the usual way this is attached to a cross shaft C suitably held in
brackets C to admit of partial turning to actuate the punkah. The latter is.
connected to the shaft C by arms D sliding in sheaths D' connected to the shaft C
in any convenient manner that will admit of the shaft turning free when desired.
A suitable method of holding the punkah at any desired height being hereafter
explained. The salient features of this invention refer to counterpoising the
punkah and parts at all positions thereby requiring only a minimum of power to
work it and giving it the jerk at starting obtained by hand worked ones.
The shaft C is carried outside the house and is fitted with a perpendicular arm E
upon which is a weight F for counterpoising the punkah. This weight is preferred.

page_text: to be loose on arm E and suspended by a cord G. passing over pulleys along shaft C
down sheaths D' and connected to the top of arms D. upon the weight being
properly set to counterpoise the punkah at a certain position drawing down the
punkah or lifting it up will correspondingly raise or lower the weight and so keep
the punkah counterpoised. If desired the end of sheath D' may have a set screw
to fix the punkah firm at any desired position. The end of shaft C is fitted with a
second arm H by which the punkah is rocked by the actuating mechanism.
This
mechanism consists of a train of wheels J, J', and J, and a regulating fly J'; upon
the arbor of wheel J is the usual winding drum, the whole being carried in suitable
frame and preferably arranged outside the house as shown in the drawings. The
fly J³ is weighted beyond what is usual that it may act as a fly wheel by which the
necessary jerk to the punkah is obtained at starting. The arbor of J³ is carried
outside of frame and has a crank arm J' attached to a connecting rod Je to connect
arm H, this and the connecting rod is counterpoised by the pendant arm J' having
a weight J³. The connecting rod Jo may be made in one or more pieces as at
Fig. 6 to facilitate adjustment of length of stroke given to arm H. K is the main
weight. Any compound arrangement may be employed or added to the operating
arrangement to facilitate the winding up of this, such being too well known to need
any illustration in the drawings or further description. It will be readily understood
that the shaft C can be carried through several rooms to actuate a punkah in each
where this is done the main weight must be correspondingly increased and in such
a case where the weight is provided to work say three punkahs, and when occasion
requires that only one should be worked a suitable brake arrangement is employed
to counteract the punkahs thrown out of action. Punkahs may also be worked
parallel.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. In mechanical working of punkahs, the combination with a mechanical power
of a punkah, attached to an arrangement for holding same fitted with counterpoise
arrangements, all substantially as hereinbefore described and illustrated by the
accompanying drawings.
2. In the working of punkahs by mechanical means, the means for raising and
lowering the height of the punkah without interfering with the counterpoise
arrangement, consisting of the arms D, D¹ cord G. loose weight F and arm E
attached to main shaft C substantially as described and illustrated by the
accompanying drawings.
3. In the working of punkahs counterpoising the punkah to reduce the amount of
power required to work the same.
4. In the mechanical working of punkahs, the use of a weighted fly regulator.
Dated this 17th day of February 1893.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, W.C., Agent for Applicants.