IMPROVEMENTS IN APPARATUS FOR TRANSMITTING POWER BY MEANS OF ROPES OR CABLES CHIEFLY DESIGNED FOR THE WORKING OF RAILWAYS
Year: 1884

page_text: I HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, London, in the County of Middlesex do hereby declare
the nature of said Invention for "IMPROVEMENTS IN APPARATUS FOR
TRANSMITTING POWER BY MEANS OF ROPES OR CABLES CHIEFLY DESIGNED
FOR THE WORKING OF RAILWAYS" 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 that class of apparatus which is used for transmitting
power to the ropes or cables of cable railways, and has for its object to prevent
slip and consequent wear and tear of the pulleys and wire rope or cable. This
object, broadly considered, is not new, but the inefficiency, or inherent intricacy
and unwieldiness, or a combination thereof, in apparatus of this class as heretoforo
employed, are serious defects which this Invention is designed to obviate.
In the accompanying Drawing
Figure 1 is a side elevation of apparatus constructed according to this Invention
for driving a cable for a cable railway.
Figure 2 is a top or plan view thereof and
Figure 3 is a section of the driving pulley and connected parts drawn to an
enlarged scale.
Similar letters of reference indicate corresponding parts in the several Figures.
A and B indicate pulleys loosely fitted on a shaft C which properly mounted on
a bed or frame A' is driven by a suitable engine or motor.
D and E indicate pulleys which are fitted to a shaft C' and revolve thereon
independently of each other, the said shaft being properly mounted on the bed or
frame A'.
On the inner sides of the pulleys A, B, are bevel wheels F, G, which are secured
to, or cast with, the said pulleys and engage with the bevel wheels H, J, fitted
loosely on a shaft K, the location whereof is between the pulleys A, B, the shaft A
having a tubular block L, which is forged or otherwise formed on, or secured to,
ונד....מן

page_text: •
it, and receives the shaft K which is keyed to the block; the wheels H, J being
securely held on the shaft K by nuts or other proper fastenings, and the pulleys A, B,
• being securely held on the shaft C by collars or other devices.
The cable, which is endless, enters from its work say at M, and then passes
underneath around the pulley A, then over and around the pulley D, next under
and around the pulley B, and then over and around the pulley E to a pulley E' on
a tension carriage E, and so passes out to its work at N.
In the apparatus heretofore employed there are grooves on a drum which is
fitted to a shaft similar to the shaft C. Although the grooves may be turned very
carefully to the same diameters the different strains on the rope in the several
grooves will eventually make them different and the cable maintaining the speed
of one groove must necessarily slip on the other, and so throw an extra strain on
the rope and grooves.
By the employment of the wheels H, J, F, G, and the separate pulleys A, B,
I compensate for the difference in the diameter of the grooves by the difference in
revolution. The mean of revolution of the pulleys A, B, will be that of the shaft C,
which drives the two pulleys, hence a uniform velocity at the peripheries and the
driving of the cable at a corresponding speed.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
First. The shaft C, in combination with the loose pulleys A, B, the gear
wheels F, G connected with the said pulleys, and the gear wheels H, J rotating
with the said shaft C and gearing with the wheels F, G, substantially as, and for
the purpose, set forth.
Second. A shaft in combination with pulleys loosely fitted thereon and carrying
gear wheels, a shaft secured to the first named shaft at right angles thereto and
supporting loosely fitted gear wheels which gear with the first named gear wheels,
substantially as, and for the purpose, set forth.
Third. The bevel wheels F, G, H, J, the driving pulleys A, B, the independent
pulleys D, E, and the cable, all combined and operating substantially as, and for
the purpose, set forth.
Dated this 95th day of March 1884