Self-acting Marine Engine Governor.
Year: 1890

page_text: Date of Application, 27th Sept., 1890
Complete Specification Left, 29th June, 1891-Accepted, 1st Aug., 1891
PROVISIONAL SPECIFICATION.
Self-acting Marine Engine Governor.
I GEORGE BERNARD 65 Swete Street Plaistow London E. Engineer do hereby
declare the nature of this invention to be as follows:-
An iron ball, with a groove round its center to travel along a parallel guide
(fixed to engineroom bulkshead,) on the rise and fall of the vessel's stem; a spindle
through center of ball attached to which is a forked rod, connected at the other
end to throttle valve lever, so that when the vessel's stem rises the ball travels
shutting off steam thus preventing the engines from racing. When vessel's stem
descends, ball travels backwards opening out throttle valve.
Dated this 26th day of September 1890.
COMPLETE SPECIFICATION.
Self-acting Marine Engine Governor.
1, GEORGE BERNARD, 65 Swete Street, Plaistow London, E. 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:—
According to this invention I employ a ball or disc capable of travelling in a
parallel guiding appliance as a means for automatically preventing the engine from
racing when the vessel's stem rises to such an extent that the resistance against
the screw propeller becomes much reduced or disappears. This ball or disc, as the
stem of the vessel rises and falls, is caused to travel in one direction or the other
and by suitable connections to the throttle valve operates the latter so as to shut
or open it. Moreover in order to increase the suddenness of the action and to
work with least friction the ball is or may be arranged within a cage so as to have
a short travel therein and to impart sudden impact to the cage when it reaches the
end of its travel therein, said cage being thereby impelled to travel along quickly
to the end of its stroke and shutting or opening the throttle valve connected to it
or operating a brake on the engine shaft or both. The apparatus may suitably be
fixed to engine room bulkhead.
In the accompanying drawing Fig. 1. is a side view, Fig. 2. a horizontal section
and Fig. 3. a vertical cross section of such an apparatus on linex of Fig. 1.
Within a cylindrical tube A which by an end flange A' and bolts may con-
veniently be fixed to an engine room bulkhead. I provide a cage B made of any
suitable form and capable of sliding in a horizontal guide slot in each side of the
cylinder A. The cage B has a rod B' which passes out through a guide cover at
the outer end and this rod B' is by levers C and D on a weighshaft E and by con-
necting rod For in any other convenient manner connected to the lever G on the
throttle valve spindle H. I is a ball which is confined within the cage B and
capable of rolling in the tube A, the interior of which may be divided up in
"lands" as shewn in Fig. 3. to diminish the friction and the effect of dirt or grease
in the cylinder whereby the free rolling of the ball might be slightly impeded. As
the stern rises and the propeller or propellers lift more or less out of water whereby
the engines will take to racing or rotating at an unduly high speed, the ball will
roll forward, to the right and knock against the inner end of the cage B and cause
the rod B' to be pushed out whereby the throttle valve by the connections shewn
(or by any other suitable means) will be instantly closed. On the other hand
[ Price 671

page_text: when the stern descends deeply in the water the opposite effect will take place,
and the throttle valve be fully opened. I prefer to provide hard rubber, hard
wood or other somewhat elastic buffers K at each end for obviating the blow and
noise.
"
Instead of a ball I may use a disc such as shewn in section at Fig. 4. and which
is guided at top and bottom in suitable V grooves in the cylinder.
Although I have shewn a cylinder A as an example of guide for the ball and
cage I do not bind myself to this form; nor do I bind myself to the form of cage
shewn nor to a cage in which the ball has end play although I prefer it.
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
1. The application and use of a ball or disc capable of rotating or rolling freely
between guides a rod for connection to the throttle valve and a part for com-
municating the motions of the ball to the rod for the purpose of automatically
governing a marine engine by the rise and fall of the stern of the vessel sub-
stantially as set forth.
2. The construction of marine governor described with reference to the
accompanying drawings.
Dated this 29th day of June 1891.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.