Improvements in Means for Transmitting Motive Power.
Year: 1888

page_text: Improvements in Means for Transmitting Motive Power.
We ALFRED ASHBY FREDERICK DAVIS, of No. 46 Wellesley Street in the City of
Calcutta, a Supervisor in the Public Works Department of the Government of India,
and HENRY HAWARD, also of No. 46 Wellesley Street in Calcutta aforesaid, Head
Assistant in the Photographic Department of the Government of India, 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:-
The object of this invention is to provide an arrangement of mechanical appliances
for economically propelling tramcars, locomotives, ships and other vehicles, mills, or
any other machinery, at accelerated rates of speed, with a minimum of power, and
without a loss of motive force.
and
In the accompanying drawing,
Fig. 1 is a side elevation of our improved means for transmitting motive power,
Fig. 2 is a plan view of the same.
Fig. 3 is a sectional view on line x y of Fig. 1 ; and
Fig. 4 shows a slight modification of part of the apparatus.
A represents a driving wheel, which is made to revolve by means of electricity,
manual or other power. B is a wheel with which A is geared, or connected by a
band or chain. D and F are pinions fixed on the axle of B.-C is another wheel
geared with B.-E and G are other pinion wheels fixed on the axle of C.-H and J
are racks worked forward by the pinions D and F, and backwards by the pinions E
and G-K and L are connecting rods by which the racks H and J are connected
with the crank pins N and M of disc or wheel P, which is larger than either of the
pinions D and F, E and G.-Q Q Q Q Q are guide bars, RRRRR are rollers or
blocks attached to the racks, and made to work between the guide bars QQQQQQ-
The wheels B and C have teeth all round, but the pinions D and F, E and G, have
teeth half way only. The arrow heads show the direction in which the wheels and
pinions move.
Now it will be seen that the wheels B and C are in gear with each other, so that B,
with its pinions, turns in one direction, and C with its pinions turns in the opposite

page_text: direction, and as one semi circular set of teeth has advanced and ungeared itself
with the rack, the other semi-circular set is immediately geared with the same rack
to bring it back again. These backward and forward movements of the racks
communicate motion to the wheel P, which is larger than either of the pinions D, F, E
and G, and so causes it to make the same number of revolutions as the pinions
themselves, with a gain of power and speed. The particular novelty whereof our
invention consists, will be seen to be an arrangement of mechanical appliances in
which a small wheel is made to drive a larger one, imparting to it the same number
of revolutions. It is thereby shown that gain in power is not loss, but gain in speed ;
and gain in speed is gain in power.
direction, and as one semi circular set of teeth has advanced and ungeared itself
with the rack, the other semi-circular set is immediately geared with the same rack
to bring it back again. These backward and forward movements of the racks
communicate motion to the wheel P, which is larger than either of the pinions D, F, E
and G, and so causes it to make the same number of revolutions as the pinions
themselves, with a gain of power and speed. The particular novelty whereof our
invention consists, will be seen to be an arrangement of mechanical appliances in
which a small wheel is made to drive a larger one, imparting to it the same number
of revolutions. It is thereby shown that gain in power is not loss, but gain in speed ;
and gain in speed is gain in power.
Thus wheel A
Wheels B and C
Pinions D F E and G:
Wheel P
9
ft. cir..
=
4
ft. do. each
=
3
ft. do. do.
=
4 ft. do.
A drives B and C with their pinions, B with its pinions in one direction, and C
with its pinions in the opposite direction.-One revolution of A gives two revolutions
to B and C, as also to their respective pinions. The pinions D F E and G, working the
racks H and J, transmit the same number of revolutions to the larger wheel P, which
consequently revolves at a greater speed than the pinions, thus proving that gain
in speed is not loss in power, and gain in power is not loss in speed, which is contrary
to the present theory that gain in power is loss in speed.-If the driving wheel is
made to revolve at the rate of 9 ft. per second with a force of lb., the wheels B
and C will be made to revolve likewise, but their respective pinions will revolve at a
less speed, or 6 ft. per second, and will move the racks at the same rate of speed, but
will make the wheel P revolve at the rate of 9 ft. per second with a force of 1 lbs.
The drawing represents "a set" (that is, one of such combinations of the parts
above described as will secure the desired effect), and any number of such " sets can
be connected together to obtain the requisite amounts of speed and power.
The same results can be obtained by omitting the wheel C and its pinions E and G
and the racks H and J, and by substituting for such racks, the racks J J¹ shown at
Fig. 4. By this modification, expense is saved, and the arrangement of parts
simplified.
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 means for transmitting motive power, an arrangement of mechanical
appliances in which a small wheel is made to drive a larger wheel, imparting to it
the same number of revolutions, as shown and described.
2. The arrangement of parts herein shown and described, and for the purpose set
forth.
1
2011
.