Ships' Steering Gear.
Year: 1890

page_text: Date of Application, 20th Sept., 1890
Complete Specification Left. 15th Dec., 1890-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Ships' Steering Gear.
ROBERT ROGER, Mechanical Engineer, Egglescliffe, Yarm, Yorkshire, do
hereby declare the nature of this invention to be as follows:-
An improvement in the method of safely controlling the movement of the
uncoupled ends of the connecting rods of ships steering gears of the "right & left
hand screw" type, when such gears are disconnected to allow the use of other means
of steering. By this invention the nuts (which travel in opposite directions upon
the right & left hand screwed spindle for the purpose of transmitting motion to the
rudder through the connecting rods & crosshead) are so formed, that when the
rods are disconnected from the nuts, by the withdrawal of the joint pins the rods
can only move within guides connected to or forming part of the nuts, which guides
may be described, as tubes of such size and form as to allow the free rod ends, to
pass along them, but preventing all dangerous motion, the joint pin holes are bored
through the tubes in lines at right angles to their axes and at the centre of their
length, additional holes are provided for the pins when not in use.
1000
COMPLETE SPECIFICATION.
Ships' Steering Gear.
ROBERT ROGER, Egglescliffe, Yarm, Yorkshire, Mechanical 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 the improvement of the method of safely con-
trolling the movement of the uncoupled ends of the connecting rods of ships
steering gears of the "right & left hand screw type, when such gears are discon-
nected to allow the use of other means of steering. By this invention the nuts
(which travel in opposite directions upon the right & left hand screwed spindle for
the purpose of transmitting motion to the rudder through the connecting rods and
crosshead) are so formed that when the rods are disconnected from the nuts by the
withdrawal of the joint pins the rods can only move within guides connected to or
forming part of the nuts, which guides may be described as tubes of such form and
size as to allow the free rod ends to pass along them but preventing all dangerous
motion the joint pin holes are bored through the tubes in lines at right angles to
their axes, and at the centre of their length additional holes are provided for the
pins when not in use.
The accompanying sheet of drawings furnished for the purpose of more fully
illustrating my invention shows a plan marked Fig. 3 and a side elevation marked
Fig. 1 of a complete steering gear of the "right & left hand screw" type fitted
with guides g, as before described.
Fig. 2 is a cross section through the line A B of one of the nuts with guide
forming part of it, showing the joint pin holes h h into which the pins pp, fit when
the gear
is in use and the holes ii into which they are dropped when the gear is
not in use at which time the free ends of the connecting rods r r can only travel
backward and forward in the guides y g. I here show the guides as forming part
of the nuts and cast in one piece with them, they may be attached to them in other
ways and may be of any convenient section other than that of a tube as shown at g
Fig. 2.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
The application to "right and left hand screw steering gears" of nuts having
guides attached to them or forming part of them, which guides control the motion
of the disconnected rod ends, as described.
Dated this 13th day of December 1890.