IMPROVEMENTS IN THE DRIVING APPARATUS OF ROTARY FANS follows
Year: 1885

page_text: I, FREDERICK HENRY KEANE, of the Cappoquin Foundry, in the County of
Waterford, Ireland, Engineer, do hereby declare the nature of my invention
for "IMPROVEMENTS IN THE DRIVING APPARATUS OF ROTARY FANS
follows:-
to be as
My invention relates to rotary fans, conveniently applicable to blowing fires for
domestic, forge, and other purposes, and consists of a driving apparatus combined
therewith, to produce a high speed rotary motion of the fan in a simple and
efficient manner.
In the ordinary belt driving gear, as at present generally in use for multiplying
the speed of the fan as compared with the first motion shaft, much trouble, expense,
and loss of time is experienced, in effecting the repairs of the belt or band thus
employed, and where gearing is used, noise, breakage, and increased first cost are
incurred.
To avoid these disadvantages, I employ a large wheel of cast iron, wood, or other
suitable metal or material, upon the first motion shaft, which is suitably mounted
upon the framing of the fan, or otherwise, and to which rotary motion is imparted
by a handle or other suitable device.
I cause this wheel to press upon and run in contact with a small wheel fixed
direct upon a shaft of the fan, and which may be made conveniently of cast iron,
wood, vulcanised indiarubber, or any other material, to effect a suitable frictional
grip between the said wheels.
In order to effect a sufficient frictional grip without slip. I may arrange the
bearing or bearings of the main driving wheel to slide under the pressure of a
spring, weight, or set screw, so that the driving surfaces of the wheels may be
pressed together with any required amount of force. Further, I may, if found
desirable, mount upon a rim of either or both of the said large driving or small
driven wheels, a band of comparatively soft indiarubber, leather, or other similar
substance, which may be compressed by the pressure, producing mutual contact,
and thus give additional frictional grip.
The two said frictional driving wheels may be in contact upon their external
circumferences respectively, or alternatively, the smaller wheel may be in contact
with the inside face of the flanged periphery of the large driving wheel, and may
rest thereon by the weight of the fan.

page_text: I may further provide for increasing the pressure of the large upon the small
wheel by making the large wheel with a bevelled rim, and providing a suitable
spring or weight to press one wheel horizontally against the other and thus to
bring them into closer contact, or the bevil on the wheel may be reversed, and the
spring inserted between the boss of the wheel and the boss of the fan. This spring
or weight pressure would be preferably applied to the first motion shaft; but
could be applied to the fan shaft, if thought desirable.
Intermediate friction wheels between the first motion shaft and the fan may be
introduced if thought desirable.
I thus form a simple and convenient frictional driving gear for multiplying the
speed of the fan as compared with that of the first motion driving shaft, so as to
impart a high speed of rotation to the fan.

page_text: I, FREDERICK HENRY KEANE, of The Cappoquin Foundry, in the County of
Waterford, Ireland, Engineer, do hereby declare the nature of my invention for
"IMPROVEMENTS IN THE DRIVING APPARATUS OF ROTARY FANS," and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
My invention relates to rotary fans, conveniently applicable to blowing fires for
domestic, forge, and other purposes, and consists of a driving apparatus combined
therewith, to produce a high speed rotary motion of the fan in a simple and
efficient manner,
In the ordinary belt driving gear as at present generally in use, for multiplying
the speed of the fan as compared with the first motion shaft, much trouble, expense,
and loss of time is experienced in effecting the repairs of the belt or band, thus
employed; and where gearing is used, noise, breakage, and increased first cost, are
incurred.
In order that my invention may be the better understood, I now proceed to
describe the same in reference to the drawings hereto annexed, and to the letters
and figures marked thereon.
Figures 1 and 2 are an end and side elevation, respectively, of a fan, fitted with
my improved driving apparatus.
Figures 3 and 4 are a longitudinal and transverse section, respectively, of the
method of support and adjustment of the first motion shaft.
Figures 5 and 6 are a longitudinal and transverse section, respectively, of a
modified method of support and adjustment of the first motion shaft.
Like letters refer to similar parts in the different figures.
I employ a large wheel A of cast iron, wood, or other suitable material, fitted
upon a first motion shaft B, to which rotary motion is imparted by a handle C or
other suitable device. The first motion shaft B is suitably mounted in the
framing D of the fan, so as to cause this wheel to press upon and run in contact
with, a small wheel E, fixed direct upon the shaft of the fan, and which may be
made conveniently of cast iron, wood, vulcanised indiarubber, or any other material,
or be surrounded by a band of indiarubber, leather, or other suitable substance F
to effect a suitable frictional grip between the said wheels.
In order to produce any required pressure to effect a suitable frictional grip
without slip between the said driving wheels, I may use any one or any
combination of the following methods of adjustment.
I may so support the shaft B in the bearing G, cast solid with the fan frame, so
as to be adjustable towards the axis of the other driving wheel E, by means of
suitable set screws, so that the driving surfaces of the wheels may be pressed
together with any required amount of force. This may be effected in the two
following ways:-The shaft B may run in the sleeve H, adjustable by the set
screws h in the bearing G of the framing, so that the said bush and shaft may be
set down by means of the set screws to cause any desired pressure between the
surfaces of the driving wheels.
This effect may be produced in an equivalent but modified manner, by boring
the hole for the shaft B in the bush H, eccentric to the centre of the bush, and
providing a step upon the said bush, upon which the set screws h operate, so as to
cause the eccentric bush H to revolve in the bearing G, and thus to bring down

page_text: the shaft B and driving wheel A upon the surfaces of the driven wheel E, with
any desired pressure.
Further, I may, if found desirable, mount upon a rim of either or both of the
said large driving wheel A or small driven wheel E, a band F of comparatively
soft india-rubber, leather, or other similar substance, which may be pressed by the
pressure producing mutual contact, and thus give additional frictional grip.
The two said frictional driving wheels may be in contact upon their external
circumferences, or the smaller wheel may be in contact with the inside face of the
flanged periphery of the large driving wheel A, and may rest thereon by the
weight of the fan, or by either of the methods described for obtaining pressure.
To further provide for constantly maintaining and increasing the pressure of the
large wheel A upon the small wheel E, I make the said wheels with bevelled rims
and provide a spring K upon the axis B of the upper wheel, which thus presses the
wheel A horizontally in its bearing against the contrary bevelled face of the
wheel E, thus bringing them into constant pressure contact.
Or the bevel on the wheels may be reversed, and the spring inserted between the
boss of the wheel and the boss of the fan.
Or the same effect may be produced by the employment of washers L L, upon
either or both of the shafts, by the transference of which from one end to the other
of the shaft, the said shaft and driving wheel A may be moved endways in its
bearing, and thus pressed home upon the other friction wheel E.
Intermediate friction wheels between the first motion shaft of the fan may be
introduced if thought desirable.
:
I thus form a simple and convenient frictional driving gear multiplying the
speed of the fan as compared with that of the first motion driving shaft, so as to
impart a high speed of rotation to the fan without noise or jar.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I claim is
1st The combination with a high speed rotary fan, of frictional driving gear,
consisting of multiplying wheels, either plain or surrounded by a band of india-
rubber, leather, or other similar material, with bearings carried in the fan frame,
and pressed together by set screws, controlling a movable or eccentric bush-bearing
of one or both of the shafts, to effect frictional grip, substantially as described.
2nd The combination with a high speed rotary fan of frictional driving gear,
consisting of multiplying wheels, either plain or surrounded by a band of india-
rubber, leather, or other similar material, with bearings carried in the fan frame,
and with bevelled rims, pressed together in the line of their shafts by a spring,
applied to either or both of the said shafts, pressing them endways in their bearings,
or by the transference of washers from one end to the other of the said shafts, to
effect frictional grip, substantially as described.
3rd The combination with a high speed rotary fan of frictional driving gear,
consisting of any combination of the whole or parts of the adjustable frictional
gearing, substantially as described in claims 1 and 2.
FELL & WILDING,
Agents for the Applicant.