Improvements in Gas or Petroleum Motors.
Year: 1894

page_text: Date of Application, 4th Jan., 1894-Accepted, 10th Feb., 1894
COMPLETE SPECIFICATION.
Improvements in Gas or Petroleum Motors.
1, OTTOCAR LINDEMANN, of 86 Queen Street, Cheapside, in the City of
London, 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 :-
This invention has for its object to more effectually utilize the crank mechanism
in four cycle gas or petroleum motors by arranging, behind the cylinder of an
ordinary four cycle motor, a second cylinder lying in the same axis as that of the
first and the piston of which is firmly connected to the piston of the first cylinder.
This connection can be effected by means of rods outside the first cylinder, or in a
more simple manner by a piston rod arranged in the axis and passing through the
end of the first cylinder by means of a stuffing box.
If the charging of the two cylinders is so arranged that their periods of explosion
follow each other alternately work is obtained with each revolution of the crank
shaft, giving about double the output without increasing the size of the crank
apparatus. A further advantage is the considerably increased regularity in
working, which practically corresponds to a twin motor with coupled cylinders.
The charging for both cylinders is effected by a valve shaft running parallel to
the axis of the cylinders, and a governor driven therefrom acts simultaneously
on both.
In the annexed drawing the new arrangement is shown with the extended
piston rod.
a is the first cylinder, and 6 the second, both being firmly connected together in
any suitable manner; c and d are the two pistons which by means of the rod e are
firmly connected together; this rod can if necessary be made hollow and be cooled
by air or water in any suitable manner.
The exhaust and inlet valves g and h are arranged on both sides of the stuffing
box fin the cylinder cover.
The valve shaft i can, by means of spur or worm wheels, be driven in the
proportion of 1: 2.
The movement of the valves, as also the action of the governor k can be effected
in any suitable manner.
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 :-
1. In four cycle gas or petroleum motors, the arrangement of two cylinders one
behind the other in one axial line and in such manner that the two pistons receive
impulses at equal intervals of a complete revolution of the crank shaft, alternately,
substantially as described.
2. In four cycle motors as in Claim 1: the arrangement of a valve shaft parallel
to the cylinder axis and running alongside both cylinders, and from which by
means of the movement of the valves the two cylinders are charged, substantially
as described.

page_text: 3. In four cycle motors as in Claim 1 the arrangement of a stuffing box in the
end of the first cylinder and the arrangement of the inlet and exhaust valves on
both sides of the stuffing box substantially as described.
Dated this 4th day of January 1894.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.