A High Speed Engine.
Year: 1899

page_text: Date of Application, 1st Aug., 1899-Accepted, 23rd Sept., 1899
COMPLETE SPECIFICATION.
A High Speed Engine.
:
I, GABRIEL PURDY BETTS HOYT, of 1, Clinton Place, Jamaica, Borough of
Queen's, New York City, United States of America, Wholesale Lumber Dealer, 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 the invention is to provide a new and improved engine, which is
simple in construction, very effective in operation, adapted to run at a high rate
of speed and arranged to transmit the motion given to the piston by the motive
agents to shafts without much if any shock or jar.
The invention consists of novel features and parts and combinations of the
same, as will be fully described hereinafter and then pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding
parts in all the figures.
Figure 1 is a sectional side elevation of the improvement, on the line 1-1 in
Figure 2;
on the line 2-2 in
Figure 3 is a sectional side elevation of a modified form of the improvement.
The improved engine illustrated in Figures 1 and 2, is provided with a
cylinder A, in which reciprocates a piston B, actuated by a suitable motive agent
admitted to and exhausted from the ends of the cylinder by suitable valves C, as
indicated in Figure 1, each valve having a supply pipe C¹ connected with a suitable
source of supply, and an exhaust pipe for carrying off the exhaust motive agent.
In the piston B at or near the middle thereof, is arranged a transversely
extending elongated slot B', in which travel wrist pins D, D¹ of crank arms, E, E
respectively, secured on shafts F, F1 respectively, journaled in suitable bearings
in the cylinder A, as will be readily understood by reference to Figure 2, said
shafts passing through vertically disposed elongated slots in the walls of the
cylinder, to allow free reciprocating motion of the piston in the cylinder. The
outer ends of the shafts F, F are connected with each other by suitable gear
wheels G, G, and each of said shafts is provided with a fly wheel H.
Figure 2 is a sectional plan view of the same,
Figure 1; and
It is evident that when the motive agent alternately admitted to the ends of the
cylinder reciprocates the piston B therein, then a continuous rotary motion is
given to the two shafts F, F1, by the action of the slotted piston on the crank
arms E, E, engaging with their wrist pins the slot B¹ in the piston. As the two
shafts F, Fare geared together, it is evident that a uniform rotary motion is
given to the said two shafts without shock or jar, especially when the piston starts
on the return stroke, as the two shafts rotate in opposite directions, due to the
gearing connecting the outer ends of the shafts with each other. The piston is
always perfectly balanced, as the wrist pins revolved oppositely by said gear, are
at all positions of the stroke at equal distances from the centre of the piston on
opposite sides of the centre line.

page_text: As illustrated in Figure 1, a cylinder of a large diameter and having a piston of
a short stroke is employed; but in order to obtain a longer stroke with a piston of
less diameter, it is necessary to provide the cylinder A¹, see Figure 3, with an
enlargement A² at or near the middle, for receiving the enlarged slotted middle
portion 133 of the piston-B2. The operation is the same as above described with
reference to Figures 1 and 2, that is, the slot B4 in the piston engages the wrist
pins D, D of the crank arms E, E¹ secured on the shafts F, F1 respectively.
As shown in Figure 2, the valves C for admitting and exhausting the motive
agent are actuated from one of the shafts, by providing the same with a suitable
cam I, actuating a link I, see Figure 1, connected with the valve plugs of the
valves C. It is evident, however, that other suitable means may be employed
for actuating the valves, as the latter instead of being oscillating valves may be
in the form of the usual slide valves, if desired.
As the shafts F, F rotate in opposite directions, the power can be transmitted
from either shaft according to the direction in which the machinery to be driven
is to be run, and if desired, each shaft may be provided with a fast and loose
pulley, connected by belts with machines, one of which runs forward and the
other backward, as the case may be. By the arrangement described, a uniform
rotary motion is given to the two shafts, jar and shock is completely avoided, and
the engine can be run at a very high rate of 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
The pair of crank shafts geared together when the wrist pins of their crank
arms are arranged in sliding connection with the piston reciprocating in the
engine cylinder to give a uniform rotary motion to the said shafts without jar or
shock and to permit of running the engine at a high rate of speed.
Dated this 1st day of August 1899.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.