Improvements in or relating to Friction Gearing.
Year: 1899

page_text: Reprinted
as amended in accordance with the decision of the Comptroner
dated the 25th day of October 1901.
15
PROVISIONAL SPECIFICATION.
Improvements in or relating to Friction Gearing.
We FREDERICK ROUGH of 21 Commercial Road Hereford Engineer and FANNY
OUGH of 21 Commercial Road Hereford Married Woman do hereby declare the nature
f this invention to be as follows:-
This invention relates to the transmission of motion by means of friction gearing
nd particularly to such transmission as is sustained affected, varied or controlled by
he employment of intermediate pulleys placed between parallel shafts, of which one
Such motion is transmitted by means of groved pulleys
s the driving shaft.
suitably affixed to the .shafts. & axles, revolving into and upon each other in..a
manner which produces a counter revolution in the pulley which is brought into gear;
and for the variation of speed and other controlling of the motion, there are employed
pulleys of varying dimensions which are (respectively) brought into gear by means of
rods and levers accessible to the operator. In the application of existing methods of
gearing it is difficult to maintain smoothness and certainty of pressure by the
respective pulleys upon each other and there is a consequent loss of power and
unevenness of motion.
The arrangement which we have invented consists of a radial swing bearing with
automatic spring adjustment in which the counter shaft in hung in a suitable inanner
to maintain a sufficiency and evenness of pressure by the respective pulleys upon each
other, and we employ a driving shaft on which the groved pulleys are of equal
dimensions adapted for responding to intermediate pulleys of varying dimensions, and
the driving shaft is (if so desired) also fitted with a drum for band brake.
We employ a swing bearing set in a pivot of suitable shape and dimension, to the
affixed a rod linked into a spiral spring which is fastened to one
lower part of which
of the component parts of the machinery in manner convenient for maintenance of
pressure by the pulleys upon each other. We employ a spiral spring of suitable
strength according to the degree of pressure required.
Our invention is carried into effect by fixing the radial swing bearing and other
parts of the arrangement in or upon a casement of any convenient shape and
dimension according as may be suitable for the machinery in which it is employed.
L1800

page_text: Improvements in or relating to Friction Gearing.
We, FREDERICK ROUGH, Engineer, and FANNY KOUGH, Married Woman, both of
21 Commercial Road, Hereford, in the County of Hereford, 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 friction gearing for the transmission of motion, and has
for its object to mount the gearing on resilient bearings so that said gearing will be
practically unaffected by shocks of any ordinary character.
Our invention and the manner of carrying the same into effect will be understood
by reference to the accompanying drawings, in which Fig. 1 is a rear elevation of
the gearing;
Fig. 2 is a cross section on the line 2-2 of Fig. 1 looking from the left;
Fig. 3 is a similar view showing the reversing pulley in operation ;
Fig. 4 is a cross section on the line 4-4 of Fig. 1 looking in the direction of the
arrow, omitting certain portions of the gearing for the sake of clearness; and
Figs. 5 and 6 are front and side elevations respectively of the spring bearing drawn
to an enlarged scale.
The same parts are lettered to correspond in all the figures of the drawings.
A is the motor driving shaft to which is keyed a pulley A¹ having a groove with
a slight taper, this communicates motion to a pulley B₁ having a correspondingly
slightly tapering periphery and keyed to the second motion or counter shaft B.
This counter shaft B is made square at one end, as shown, to permit of the
speed cone B2 (Fig. 1) being moved longitudinally without turning so that the
varying diameters 61 62 and 6s thereon may be brought opposite to the grooved
pulley C as desired. The pulley C is rotatably mounted upon a bar C¹ which is
moved by the operative backwards and forwards at such time as it is desired to
change the speed of the gear. The pulley C is held in contact with the pulley D on
the driven shaft D¹ and with the speed cone B2 by means of a spring, not shown in
the drawings, acting upon the bar C¹.
On the bar, C¹ is pivotted at C₁ a radial arm C2 on the extremity of which is
rotatably mounted a pulley C³ (see Figs. 2 and 3) which is brought into action when a
it is required to reverse the operation of the gear, but this reversing pulley C³ can
only be used in one position on the speed cone B2, that is when the groove b* is moved
into line with same.
At each end the counter shaft B is mounted in swing bearings d one of which is
shown detached in Figures 5 and 6. These bearings d are pivotted at their upper 3
ends on a bolt d¹, secured to some fixed part, and at their lower ends are provided
with a slot d² in which is adjusted a screw bolt d³ also secured to some fixed part, so
that a certain amount of play is allowed to the bearing and limited by the slot d².
Through a transverse hole in the bearing is passed an adjustable eye bolt do one end
of which is furnished with nuts do or other suitable stops, while the other end is 4
attached to a suitable spring, such as d¹, the opposite end of which spring is attached
to some fixed part or to the casing of the machine on which the gearing is
mounted.
The object of this spring-controlled swing bearing is to cause the friction pulleys
to engage with one another with a sufficient amount of pressure to transmit the 4
required power to the driven shaft, the eye-bolt d5 being capable of adjustment by
means of the screw and nuts de thereon. If the gearing should be subjected to shock
the springs d' would be extended and the friction wheels would slip and prevent the
gearing from being overstrained.
The speed varying mechanism is operated as follows:—
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When it is desired to change from one speed to another, the operative
(Fig. 1
ver (not shown) attached to the bar C¹ which draws the grooved pulley C out of
ontact with the speed cone B2 and pulley D. He next operates a lever
nd 2) which transmits a lateral movement through the studs e to the speed cone
32 and the desired speed gear is placed opposite to the pulley C which is then
eturned to its operative position in contact with the speed cone B2 and the
pulley D.
The bar C¹ passes through a vertical slotted guide C5 to maintain
t in the required position. Three speeds are shown in connection with this gearing
and it will be readily understood that the same operation is required in each case to
effect a change of speed, but when a reversal of motion is required the pulley C³ is
brought into action by first shifting the speed cone B2 to the desired position
and bringing the radial arm C2 into position such that the pulley C³ becomes
engaged with the groove 64 on the speed cone B2 and with the intermediate grooved
pulley C.
Each of the gears 61 62 and 63 on the speed cone B2 is similar in character to that
on the driven shaft D'; in the drawings, these gears are shown with tapering
peripheries while the intermediate pulley C is made with a tapering groove. The
gear 6 however being used only for reversing the motion, is made with a tapering
when they are in gear.
groove while the reversing pulley C³ has a tapering periphery which engages in the
in the gear 6 and in the intermediate pulley
The friction gearing herein before described is more especially intended for appli-
cation to a motor car for transmitting motion of the motor shaft to the driving axle,
but obviously it may be applied to other mechanism where a resilient transmission of
motion is required between parallel shafts.
grooves
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:-
1. In friction gearing mounting the counter shaft on resilient swing bearings
substantially as herein described with reference to the accompanying drawings.
2. In friction gearing mounting the counter shaft in bearings carried by radial
arms pivotted on fixed centres of motion and spring controlled to operate substantially
in the manner and for the purposes herein before described with reference to Figs. 5
and 6 of the accompanying drawings.
KUTAU
Dated this 7th day of September
KETAU
F. W. GOLBY,
Patent Agent, 36 Chancery Lane, London, W.C.
Agent for the Applicants.