Improvements in Steam Engines.
Year: 1890

page_text: Date of Application, 8th Oct., 1890
Complete Specification Left, 8th July, 1891-Accepted, 8th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Engines.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by George Carey, of Salem, Massachusetts, Inventor,)
to be as follows:-
This invention has for its object to increase the power of steam engines, by means
of greater leverage.
By this invention the steam-cylinder is preferably supported in a vertical position,
with its piston downwards towards the bed-plate. At the opposite end of the bed-
plate are situated the crank-shaft bearings, and crank-shaft. Midway between the
bearings and the cylinder is a vertical support, to which is pivoted a lever, which
extends from its pivot to the end of the piston-rod, and which lever has a rearwardly
projecting arm, to which is secured one end of a bell crank lever. The other arm
of the bell crank lever is connected to one end of the pitman, whose other end is
connected to the crank in the usual manner.
By this construction the piston operates upon the long lever, whose other end
oscillates the bell crank lever, and communicates motion to the pitman and crank-
shaft.
Dated this 8th day of October 1800
J. P. BAYLY,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Engines.
I, JOHN PITT BAYLY, of 18 Fulham Place, Paddington, in the County of
London, Patent Agent, do hereby declare the nature of this invention (a com-
munication to me from abroad by George Carey, of Salem, Massachusetts, U.S.A.
Inventor,) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention has for its object to improve the construction of steam engines,
whereby greater power may be exerted upon the crank without increasing the stroke
or diameter of the piston to an undesirable degree.
In accordance with this invention the usual piston-rod acts on the long arm of a
pivot lever to the short arm of which is pivoted an auxiliary lever pivoted on a
shaft which passes through a suitable radial slot in the short arm referred to, the
other arm of said auxiliary-lever being jointed to the pitman operating the usual
crank of the engine.
My invention, however, consists in the combination with the cylinder and piston,
and a pivoted lever operated thereby, of an auxiliary pivoted lever jointed to said
lever and to the pitman, and adapted to operate substantially as will be described.
Other features of my invention will be hereinafter pointed out in the claims at
the end of this Specification.
:
Fig. 1 shows in side elevation a steam-engine embodying this invention; Fig. 2, a
sectional detail taken on the dotted lines ax, Fig. 3; Fig. 3 a vertical section taken
on dotted lines ¹¹, Fig. 4 and Fig. 4 a top or plan view of a portion of view 1.
Referring to the drawings, the cylinder a, supporting-frame a', and guides a² are
and may be of any usual construction. The piston-rod is keyed or otherwise
secured to the cross-head 6', having an opening to receive the end of the long arm

page_text: of the lever c, pivoted at c in the supporting-arm C, a short arin of the said lever
being represented as forked, and between the two arms thereof at 2 is journailed
the box fitted to slide in a slot in the arm 10 of the auxiliary bell-crank
lever e³, pivoted on a shaft co, extended through suitable radial slots cx in the lever c
and supported by frame C. The other arm 12 of the auxiliary bell-crank lever e
has a strap 13 which is adjustable on the lever by a screw 14 (see Figs. 1 and 3) and
to the outer end of said arm is jointed the pitman e' which drives the crank cof
the drive-shaft c, on which is mounted the usual fly-wheel c10. As the piston
reciprocates the lever e vertically the auxiliary bell-crank lever c is rocked on its
pivot c, transmitting to the pitman a horizontal reciprocating motion which turns
the crank.
The bell-crank lever is represented as having the downwardly extended arm 50,
on which a weight may be placed to counterbalance the working parts.
I have herein shown the shaft e as journalled in a box 25 adjustably held in the
auxiliary bell-crank lever by screws 26, in order that the pivotal point may be
adjusted to receive the best release.
By referring to Fig. 1 it will be seen that the power transmitted by the lever c
is greatly increased, it being, as herein represented, in the proportion of two to one
while it is again doubled by the short arni of the lever c, and the auxiliary bell-crank
lever c, thus greatly increasing the capacity of the engine without increasing to an
undesirable limit the diameter and the stroke of the piston.
I do not limit my invention to the particular construction of the auxiliary lever
shown, as the same may be varied without departing from the scope of this invention.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:
1. The combination, with the cylinder and piston-rod of the pivoted lever c
operated thereby, of an auxiliary pivoted lever jointed to said lever c, and to the
pitman to operate, substantially as described.
2. The combination, with the cylinder and piston-rod of the pivoted lever c
operated thereby, of a bell-crank lever c, one arm of which is jointed to said lever
and the other arm to the pitman, substantially as described.
3. The combination, with the lever e pivoted at c¹ and having a forked arm pro-
vided with slots ex of the bell-crank lever e pivoted on the shaft c, passing through
said slots, substantially as described.
4. The combination, with the lever e pivoted at c and having a forked arm pro-
vided with slots ex, of the bell-crank lever c pivoted on the shaft c, passing through
said slots, and having a slot c for the box c³ journalled in said forked arm,
substantially as described.
Dated this 8th day of July 1801
J.. P. BAYLY,.
Applicant.