Power Transmission Gear and Apparatus.
Year: 1893

page_text: Date of Application, 18th Dec., 1893
Complete Specification Left, 17th Sept., 1894-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION.
Power Transmission Gear and Apparatus.
GEORGE FRANCIS MELLEN, Gentleman, 28 Victoria Street Westminster S. W.
London and ARTHUR JAMES DRAKE, Engineer, 13 Broad Green Avenue,
West Croydon, County of Surrey, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the transmission of power from one shaft to another,
or from gas, oil or electric motors or any other power, to machines, boats, propellers
or travelling wheels of a road, rail, or tramcar or locomotive at any speed or at varied
speed as required, without alteration to the speeds of the motive or first power as in
each case the transmission gear or apparatus will be the same.
Therefore for explanation that applies to a tram-car motor will suffice.
On the end of the crank shaft is placed a pulley of any convenient diameter and
width and on its outer or inner side of the rim a number of wood, metal or any other
suitable blocks shall be placed, and attached to a similar number of arms or bosses
on a plate or pulley wheel. These arms, plates, or pulley wheels being keyed to the
shaft to be driven, and on this shaft shall also be a grooved boss sliding on a feather
and coupled to the friction blocks by levers so that when the grooved boss is
shifted by means of a lever or levers working in the groove it will draw or force
the blocks tightly upon the outer or inner side of the rim of the pulley so that the
whole of the blocks turn with the main driving pulley and thus transmitting the
power through the arms, bosses, or pulley wheel to the shaft and thence to the axles
of the tram-car motor.
On a tram-car motor, boats, locomotives and other machines, it is required to run
at a varied speed; to accomplish this each friction block shall have a ball or weight
attached either on the block or by means of a lever, and revolve with the blocks so
that as the speed increases the balls or weights will act so as to release the
of the blocks upon the pulley, and as the speed decreases so the blocks will again
become tighter on the pulley, and that by increasing the pressure of the blocks
upon the pulley any speed up to that of the pulley may be obtained.
London, December 18th 1893.
pressure
GEORGE FRANCIS MELLEN.
ARTHUR JAMES DRAKE.
COMPLETE SPECIFICATION.
Power Transmission Gear and Apparatus.
We, GEORGE FRANCIS MELLEN, Gentleman, 28, Victoria Street, Westminster,
S.W. London, and ARTHUR JAMES DRAKE, Engineer, 13, Broad Green Avenue,
West Croydon, County of Surrey, 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 the transmission of power from one shaft to another or
from motors to machines, at speeds which may be varied while the speed of the
motor remains constant. For this purpose we employ a friction clutch of which
Fig. 1 of the accompanying drawings is a section and Fig. 2 is a front view
A and B are two shafts either of which, such as A, may be the driver, the other B

page_text: being the driven shaft. On A is a sliding boss C which can be moved longitudinally
by a lever D or otherwise, being fitted with a feather so that it must revolve with
the shaft, on which is keyed a wheel E. In a groove of the sliding boss C are
engaged the long arms F of several bell crank levers which are pivotted at the
circumference of the wheel E. The shorter arms G of these levers have jointed to
them brake blocks H which may be faced with wood to bear against the
circumference of a wheel K keyed on the shaft B. According as the boss C is slid
more or less away from E the brake blocks are pressed more or less forcibly
against the wheel K which is thus driven; and according as there is more
or less slip of the brake blocks, so the wheel K is driven at less or greater
speed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
For transmitting power from one shaft to another, a friction clutch substantially
as described and illustrated.
Dated this 17th day of September 1894.
ABEL & IMRAY,
Agents for the Applicants.