Improvements in Combined Rack and Adhesion Locomotives for Steep and Ordinary Gradients.
Year: 1894

page_text: Date of Application, 1st Dec.. 1 (4
Complete Specification Left, 28th Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Combined Rack and Adhesion Locomotives for
Steep and Ordinary Gradients.
I, RALPH PEACOCK, Engineer, of Gorton Foundry, Manchester, do hereby
declare the nature of this invention to be as follows:-
My invention relates to the construction of combined rack and adhesion
Incomotives adapted for running on steep gradients as well as on ordinary gradients,
these locomotives being provided with engines and rack gear as well as with engines
and ordinary driving wheels. For working the ordinary driving wheels I employ
outside cylinders arranged in the usual way; for working the rack gear I employ
a pair of internal cylinders the pistons of which are connected to cranks at about
right angles to each other on a single crank shaft having on it a toothed pinion or
pinions gearing with two sets of the toothed wheels that gear with the rack, these
wheels being situated below and on each side fore and aft of the crank shaft. The
axles of the rack wheels and the crankshaft between them have their bearings
formed in side frames of the kind described in the Specification No. 9472 of 1886,
these frames being jointed on trunnions formed on the axle boxes of the ordinary
driving wheels, which work as usual in horn plates. The rack gearing is thus
maintained always at the same level relatively to the rails without being subject to
the vertical oscillation of the main framing of the locomotive.
Dated this 1st day of December 1894.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in Combined Rack and Adhesion Locomotives for
Steep and Ordinary Gradients.
I, RALPH PEACOCK, Engineer, of Gorton Foundry, Manchester, 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 :--
This invention relates to the construction of combined rack and adhesion
locomotives adapted for running on steep gradients as well as on ordinary gradients,
these locomotives being provided with engines working rack gear as well as with
engines working ordinary driving wheels. For working the ordinary driving wheels,
I employ outside cylinders arranged in the usual way or any other equivalent known
arrangement. For working the rack gear, I employ a pair of inside cylinders, the
pistons of which are connected to cranks at about right angles to each other on a
single crank shaft, having on it a toothed pinion or pinions gearing either with one
or more toothed wheels keyed on the axles that drive the rack pinions or gearing
directly with the rack pinions, these wheels and pinions being situated below and
en each side fore and aft of the crank shaft. The axles of the rack pinions and
ile crank shaft between them have their bearings formed in side frames of the kind
P1

page_text: described in the Specification to Patent No. 9472 of 1886 these frames being
jointed on trunnions formed on the axle boxes of the ordinary adhesion driving
wheels or ordinary carrying wheels which work as usual in horn plates in the main
framing of the locomotive. The rack gearing is thus maintained always at the
same level relatively to the rails without being subject to the vertical oscillation of
the main fraining of the locomotive.
The accompanying drawing shows an arrangement of locomotive according to my
invention. Fig. 1 is an elevation with one of the inside cylinders shown in section.
Fig. 2 is a plan partly in section. The pistons of ordinary outside cylinders which
may be attached to the main frames in any convenient position are connected to the
main adhesion driving wheels and axles A by rods attached to the crank pins B,
these pins being coupled, if required, to those of another pair of adhesion driving
wheels and axles (by coupling rods attached to the cranks D or the wheels may
serve merely as carrying wheels. The pistons of the inside cylinders E and E² are
connected to the axle F which has cranks f' and f at or about right angles to each
other on which crank axle are mounted two toothed pinions G and G2 which each
gear respectively into corresponding toothed pinions H and H2 on the shafts J and J2
that carry the toothed wheels K and K2 which gear into the rack rail, the shafts J
and J and the crank-shaft F being carried in bearings L, L2 and L³ formed in the
side frames M and M2 which are themselves carried on trunnions attached to the
axle boxes N and N2 of the adhesion driving and coupled wheels or adhesion
driving and carrying wheels respectively, as the case may be.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Driving gear for the rack pinions of combined rack and adhesion locomotives
consisting of an intermediate cranked axle driven by inside cylinders and carrying
a pinion or pinions gearing either with pinions keyed on the shafts of the rack
pinions, or gearing directly with the rack pinions themselves, the said cranked axle
and the rack pinion axles being mounted on frames pivotted on the axle boxes of
the adhesion or carrying wheels substantially as described.
Dated this 28th day of August 1895.
ABEL & IMRAY,
Agents for the Applicant.