Improvements in Steam Engines and Particularly the Mode of Actuating the Valves of same.
Year: 1888

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Engines and Particularly the Mode of
Actuating the Valves of same.
FREDERICK WILLIAM CANNON Consulting Engineer The Carlton Engineering
Company Glengall Road Millwall London, E. County of Middlesex, do hereby declare
the nature of this invention to be as follows :-
The engine comprises two cylinders with a circular space between them large
enough for the crank to revolve, the crank being connected to two trunk pistons by
two connecting rods working on a knuckle joint at the crank pin end and working in
a fork bearing the two piston ends. The crank shaft works through two covers with
the necessary arrangement of stuffing boxes etc. and when necessary cooler bearings
are fitted. Above the crank space is a valve face of the ordinary engine type with
the exception that the exhaust port opens into the space in which the crank revolves.
A valve of ordinary construction is actuated by a lever working on a fixed pin in the
centre with the lower end forked and working on an eccentric cam keyed to the crank
shaft the top end of lever being fitted with a roller working in a fork cast or fitted in
the exhaust port of the valve so that as the crank revolves a laterial motion is given to
the valve and steam admitted as required into the cylinders. For reversing engines
two slide valves are employed with double levers, rollers, and cams with one valve
arranged to drive the engine in each direction so that by means of a double valve face
and a valve sliding between same steam is either admitted or shut off from either valve
thus allowing the engine to be driven at will either ahead or astern. These engines
are also arranged with a divided valve chest to work compound or what is known as
high and low pressure.
They are applicable to all purposes where steam engines are
employed.

page_text: Improvements In Steam
es апа гагыситагту the ԱՍԿԵ
Actuating the Valves of same.
FREDERICK WILLIAM CANNON Consulting Engineer The Carlton Engineering
Company Glengall Road Millwall London, E. County of Middlesex 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 engine comprises two steam cylinders, pistons, steam valves connected together
and actuated as follows
For the better comprehension of my invention I have shown on the annexed drawings
the manner the whole is arranged.
Sheets 1 and 2 show a section through centre of engine and a cross section of
same. A. A. are the two cylinders referred to. B. B. are two pistons working in A. A.
connected by means of the two connecting rods C. C. to the crank pin D by means of
a knuckle joint as shown. E is a fixed cam on the crank shaft fixed at an angle to
the crank pin D that will give the necessary lead to the valve G. F is a forked lever
working on a fixed pin transmitting a laterial motion to the valve G as the crank
shaft rotates thereby admitting steam to the two cylinders as required. H is steam
space inside valve chest. I is top valve face. J is intermediate valve for the purpose
of shutting steam off one valve and admitting steam through the dotted port to the
other for the purpose of driving the engine in opposite directions. K is a spindle
working through stuffing box in end of valve chest communicating by means of side
links with the lever I for reversing purposes placed within easy reach of the operator.
M is the steam inlet to valve. N is the exhaust so that the exhaust steam has to play
among and assist in lubricating the working parts before escaping into the open air.
In stationery land engines where the engines are only required to travel in one direc-
tion the parts marked I. J. K & L are not required and instead of two valves, levers,
and cams, one valve, lever, and cam is all that is necessary. In sheet 3 I have shown
another way the valve can be actuated if preferred. D is the steam space of slide
valve chest. A the exhaust port of valve. B a brass or other metal block travelling
up and down inside the exhaust port and giving a laterial motion to the valve by
means of the cam C' admitting steam to the cylinders in a similar manner shown in
sheets 1 and 2. Sheet 4 shows the manner in which the engine is compounded. A is
the steam chest, steam is admitted by the valve through the port B giving an impulse
to the piston of the small cylinder. On the piston arriving at the end of stroke, the
valve being moved by the lever until the port C in valve covers the cylinder steam
port B on the return stroke of the small piston the small cylinder exhaust through
cylinder port B, through valve port C, large cylinder port D and re-expands itself
in the large cylinder fianally exhausting through port D'into the exhaust port of the
valve E and into the space F lubricating the working parts and finally escaping
through a similar opening to that marked N in sheets No. 1 and 2.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner same is to be performed I declare that what
I claim is
1st. Simplicity of construction and non liability to derangement when driven at
high speeds.
2nd. The valves G in sheets 1 and 2 also the compound valve in sheet 4 and the
valve in sheet also the mode of actuating same by means of the cams and levers
as shown in sheets 1, 2 and 4 or direct off the end of shaft in sheet No. 3 by
means of a cam and travelling block inside exhaust port of valve.
3rd. Actuating the valve or valves through the exhaust port either jointly or
separately.
4th. The reversing arrangement as shown in sheets 1 and 2.
5th. The design of compound engine as shown in sheet No. 4.