1 MENTS IN MACHINERY OR APPARATUS FOR STARTING STOPPING REVERSING AND TURNING MARINE AND OTHER MOTIVE POWER ENGINES WHICH IMPROVEMENTS ARE ALSO IN PART APPLICABLE TO COMBINED STEAM AND HAND STEERING ENGINES AND FOR OTHER PURPOSES WHERE MOTIVE POWER IS REQUIRED
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Alexander Watson Pattie and George
Washington Robertson at the Office of the Commissioners of Patents on the
15th April 1882.
ALEXANDER WATSON PATTIE, Engineer and GEORGE WASHINGTON ROBERTSON
Engineer both of Glasgow in the County of Lanark North Britain IMPROVE-
"1
MENTS IN MACHINERY OR APPARATUS FOR STARTING STOPPING REVERSING AND
TURNING MARINE AND OTHER MOTIVE POWER ENGINES WHICH IMPROVEMENTS ARE
ALSO IN PART APPLICABLE TO COMBINED STEAM AND HAND STEERING ENGINES
AND FOR OTHER PURPOSES WHERE MOTIVE POWER IS REQUIRED
"
This Invention which relates to improvements in machinery or apparatus for
starting, stopping, reversing and turning marine and other motive power engines
consists in the employment for such purposes of an engine with three oscillating
cylinders arranged and constructed substantially as described in the specifications
filed in pursuane of Letters Patent granted to Andrew Higginson bearing date the
eighteenth day of August 1879 No 3320 and in pursuance of Letters Patent granted
to George Washington Robertson one of the present applicants bearing date tho
fifth day of April 1881 No 1742 and in pursuance of Letters Patent granted to
Andrew Higginson bearing date the twenty-third day of June 1881 No 2749.
In adapting the said Engines to the starting, stopping, reversing and turning of
marine and other motive power engines two standards or frames only are employed
and the spur and chain gearing whereby the said engines are caused to steer the
ship are entirely dispensed with.
On the valve end of the handing or steering shaft a worm screw is formed or fixed
and geared with a worm wheel carried in a bracket on the standard or frame. In
the hub or boss of the said wheel a screw thread is formed and geared with a
similar screw thread formed on one end of the valve spindle so that in turning the
handing shaft the worm wheel acts on the spindle as a nut and communicates
reciprocating motion thereto. On the said spindle a piston valve is secured and
situated in a valve chest which communicates by three pipes or passages with the
three oscillating cylinders each of these pipes being divided throughout its length
by a diaphragm or web the steam being distributed to the cylinders through one
passage and exhausted through the other,

page_text: The valve spindle passes through the valvo chest and its other end also passos
through the hub of a worm wheel carried in a bracket on the standard or frame the
wheel and spindle being geared together by a feather. The last mentioned worm
wheel is goared with a screw fixed or formed on the crank shaft of the apparatus
the effect of which arrangement is that tho valvo, after being operated in one
direction by tho handing wheel, is immediately operated in the opposite direction by
the crankshaft.
The crank shaft of the apparatus has another screw formed on it on which a
crosshend reciprocates. To the crosshead drag links are connected tho said links
being also connected to a quadrant which operates the steam distributing valves of
the marine or other engine in the manner well understood and practised or instead
of a crosshead being situated on the crank shaft the screw of the said shaft may bo
geared with a toothed quadrant or with a wheel or it may be otherwise connected
to the valve spindles of the main engine it being understood that we do not restrict
ourselves to the method of connecting the starting, stopping, reversing and turning
apparatus to the said valve spindles of the main engine as such connection may be
effected in many different ways.
In lieu of a piston valve actuated by screws and worm wheels being employed in
the starting, stopping, reversing and turning apparatus as hereinbefore described
the valve arrangements set forth in the several specifications herein before recited
may be substituted therefor or the valvo arrangement described in the specification
filed in pursuance of Letters Patent granted to the present applicant George
Washington Robertson and Isnac Beck dated 5 July 1881 No 2924 inay be used.
The said piston valve arrangement described under the first part of this Invention
may also be adapted to the combined steam and hand steering engine for which
Letters Patent were granted to the said George Washington Robertson No 1472
A.D. 1881 as aforesaid in substitution for the valve gear therein described in
which case the screwed end of the valve spindle is continued upwards so as to
enable the apparatus to be actuated from the bridge, the connection between the
Enid spindle and the bridge gear being made by any suitable coupling which can
be connected and disconnected at pleasure. The screw on the handing shaft is
capable of being thrown out of gear with the one wheel so as to render the said
shaft stationary when the apparatus is being actuated from the bridge.
The engine with the said improved valve gearing adapted thereto may also be
used as a hoisting or winding engine or for other purposes for which motive power
is required.