IMPROVEMENTS IN STEERING GEAR
Year: 1884

page_text: 1 GEORGE PETRIE of No 1 De Vere Gardens Kensington, London, Ship Owner
do hereby declare the nature of my invention for IMPROVEMENTS IN STEERING
GEAR to be as follows:-
--
1. A strong metal basin keyed on to a shaft in a suitable frame fastened to the
deck.
"
2nd The upper part of the basin is fitted with a wheel or rack made of metal.
3rd Metal worm fitted on a horizontal intermediate Shaft working in frame the
periphery is so placed as to turn the vertical shaft, the bottom ends being fitted
with a clutch coupling or chain wheel as required.
4th Two spur wheels are fixed on the sides of worm and keyed on the inter-
medinte shaft gearing with spur pinions fitted on an upper horizontal Engine
shaft working in bearings of the said frames on which a Steam Cylinder is fixed
on each side with Girders and connecting rod, connecting the disc pins and two
double eccentrics are fixed on Engine Shaft to work the slide gearing.
5th The arrangement for shutting off the Steam slide valves for stopping the
Engines when the rudder is hard over is by a suitable worm sliding in the slide
link shaft gearing with a worm quadrant bolted to vertical or main shaft and by
the revolving action of the shaft this works the draw links connected to the steam
valves.
The whole forming a complete steering apparatus applicable to steam or sail
vessels.

page_text: COMPLETE SPECIFICATION.
I GEORGE PETRIE of N° 1 Do Verė Gardens Kensington London Ship Owner
do hereby declare the nature of my invention for IMPROVEMENTS IN STEERING
GEAR and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
(1) A cast Iron basin keyed on the upper part of a wrought Iron shaft placed in
a vertical position in an Iron frame-secured to main or bridge deck-the lower
part of shaft being fitted with a tiller arm, clutch coupling, or chain wheel to
lead to ship's rudder.
(2) The upper part of said basin fitted internally with an annu'ar worm wheel
or rack made of cast steel or other metal.
(3) An iron or steel worm fitted on a horizontal spindle working in a suitable
carriage, the periphery of which is so placed to gear with the said annular worm
wheel thus causing a revolving action to the snid vertical or main shaſt.
(4) A spur wheel is fixed on each side of the said worm or keyed on worm
spindle-gearing with intermediate spur wheels, thus driven by two spur pinions
fitted on an upper horizontal Engine shaft, working through the said carriage,
suspended by two wrought iron stay bars, the ends of which are securely fixed to
the said Cast Iron frames.
(5) A single acting Steam Cylinder provided with piston & rod is fixed on, each
side of the said cast iron frames connected in the ordinary way to discs which are
keyed on each end of uppermost horizontal engine shaft working. through the said
carriage and frames on which is fixed two eccentric sheaves for working the steam
slides.
•
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
The before mentioned improvements in steering gear.