Regulating or Adjusting the Transmission of Power and Speed of Prime Movers.
Year: 1895

page_text: Date of Application, 26th Oct., 1895
Complete Specification Left, 25th July, 1-96-Accepted, 29th Aug., 1896
PROVISIONAL SPECIFICATION.
Regulating or Adjusting the Transmission of Power and Speed of
Prime Movers.
I, GEORGE JOHNSTON, of Mosesfield, Springburn, in the County of Lanark,
North Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say :-
My said invention has for its object to facilitate the regulation or adjustment of
the transmission of power and speed of any prime movers subject to variations
in the work to be done or resistance to be overcome.
In carrying out my invention according to one modification I employ a steam
engine, a gas or oil engine, or other prime mover, arranged in any suitable known
way, with a speed governor preferably adjustable, to give a practically uniform
speed to a rotating shaft. I connect a crank pin on the rotating shaft to a
vibrating lever which is also connected by a rod to the piston of a pump, the
connection of this rod to the lever being adjustable and the arrangement such that
the connection joint can be set in the vibration axis of the lever.
When the
connection joint is at the axis of the lever the vibration of the lever will impart no
motion to the rod and pump. With other positions of the joint the extent of
notion imparted will be greater and, inversely the pressure or leverage will be less,
the further the joint is adjusted from the centre of axis.
The pump is arranged to pump oil or other suitable liquid and to force it into a
cylinder engine or other suitable motor such motor being arranged to drive a
rotating shaft, to which the power of the prime mover is thus transmitted in
a manner allowing of the power and speed being easily controlled, and without the
intervention of toothed gearing.
Dated this Twenty-fifth day of October 1895.
EDMUND HUNT,
Applicant's Agent.
Regulating or Adjusting the Transmission of Power and Speed of
Prime Movers.
1, GEORGE JOHNSTON, of Mosesfield, Springburn, in the County of Lanark,
North Britain, Engineer, 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, that is to say :-
My said invention has for its object to facilitate the regulation or adjustment of
the transmission of power and speed of any prime movers subject to variations in
the work to be done or resistance to be overcome.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to, and showing two modifications of my improved
apparatus for regulating or adjusting the transmission of power and speed of prime
movers.

page_text: Figure, 1, of the drawings is a sectional side elevation of one modification and
Figure, 2, is a vertical cross section of a part of the same. Figures, 3, and 4, are
similar views of a second modification. In these drawings the same reference
letters are used to mark the same or like parts wherever they are repeated.
In carrying out my invention according to the modification shown in Figures, 1,
and 2, of the drawings, I employ a steam engine, a gas or oil engine, or other prime
mover, arranged in any suitable known way, with a speed governor, preferably
adjustable, to give a practically uniform speed to a rotating shaft, A. I connect a
crank pin, B, on the rotating shaft, A, by a link, E, to a vibrating lever, C,
consisting of two bars vibrating about a fixed axis, D. The bars of the lever, C,
have between them and fitted to slide along them slippers, G, which are jointed to
one end of a rod, II, connected to the rod, J, of the piston, K, of a pump, L, and
by a pair of links, M, to a crank hand lever, N, movable about a fixed centre, P.
The end of the rod, H, jointed to the slippers, G, can be adjusted up and down upon
the lever, C, and can be set so as to coincide with the vibration axis, D, of the
lever, C, or at a greater or less distance from that axis. When the connection
joint of the rod, H, slippers, G, and lever, C, is at the vibration axis, D, of the
lever, C, the vibration of the lever will impart no motion to the rod, H, and pump
piston, K.
With other positions of the connection joint the extent of motion
imparted will be greater and inversely the pressure or leverage will be less, the
further the joint is adjusted from the centre or axis.
In the modification shown in Figures, 3, and 4, of the drawings the rod, H,
consists of two bars and to these the two bars of the lever, C, are directly jointed
at the end. The parts of the rod, H, are jointed at their ends to a radius rod, Q,
turning about an axis, R, in a bracket, S. Slippers, G, are in this modification as
in the first fitted to the lever bars, C, and are jointed to a block, T, fitted to slide
in guides in the bracket or standard, S. A screwed rod, U, on which is a hand
wheel, V, is held in an overhanging part of the bracket, S, and works in the
block, T, for the purpose of adjusting it and the slippers, G, up and down on the
lever, C. The slippers, G, and block, T, form a fulcrum for the lever, C, and can
be drawn upwards so that their axis coincides with the connection joint of the lever
and rod, H, and if set at that point no movement is communicated to the rod and
pump piston, K. At other positions of the slippers, G, and block, T, forming the
fulcrum corresponding movements are communicated to the rod, H, as in the first
modification.
The pump, L, is arranged to pump oil or other suitable liquid and to force it
into a cylinder engine or other suitable motor such motor being arranged to drive
a rotating shaft to which the power of the prime mover is thus transmitted in a
manner allowing of the power and speed being easily controlled and without the
intervention of toothed gearing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performel 1 declare that what I
claim is:
Regulating or adjusting the transmission of power and speed of a prime mover
by means of a pump forcing a liquid into a secondary motor the pump being worked
from a primary motor through levers and rods capable of adjustment for varying
the length of stroke of the pump substantially as hereinbefore described.
Dated this Twenty-fourth day of July 1896.
EDMUND HUNT,
Applicant's Agent.