AN IMPROVED GOVERNOR FOR STEAM AND OTHER ENGINES
Year: 1877

page_text: LETTERS PATENT to Richard Norfolk, of Beverley, in the County of York,
Managing Director of the Beverley Iron and Waggon Company, Limited, and
Isaac Griffith Lloyd, of the same Place, Engineer, for the Invention of "AN
IMPROVED GOVERNOR FOR STEAM AND OTHER ENGINES."
Sealed the 1st June 1877, and dated the 15th March 1877.
PROVISIONAL SPECIFICATION left by the said Richard Norfolk and Isaac
Griffith Lloyd at the Office of the Commissioners of Patents on the 15th March
1877.
RICHARD NORFOLK, of Beverley, in the County of York, Managing Director of
the Beverley Iron and Waggon Company, Limited, and ISAAC GRIFFITH LLOYD, of
the same Place, Engineer. "AN IMPROVED GOVERNOR FOR STEAM AND OTHER
ENGINES."
The object of this Invention is to provide a sensitive governor uninfluenced in its
action by the principle involved in the ordinary or "Watt" governor, in which the
controlling power is reduced in consequence of the vertical height from the plane of
revolution to the point of suspension becoming less as the balls rise, and thereby
requiring a higher speed than is proportionately obtained to raise the balls to
another position. Also to be prompt in descending upon the slightest decrease of
speed of the engine, as opposed to the tardy action and tendency to hang on the
part of the ordinary governor.
The principle on which the governor is constructed is that of a lever balanced
at each end with balls of equal weight, the normal position of which is horizontal.
The governor has two levers or arms with balls, as above described, connected by
links to a sleeve which actuates the forked lever working the throttle or other
valve. As the governor revolves the arms tend to assume their natural horizontal
position and with increasing energy as the speed increases. The balls have no
inherent power to descend, therefore a spring or weight is placed to press upon the
sleeve to open the throttle or other valve as the speed of the engine decreases. The
power exerted to open the valve upon a reduction of speed may be obtained by a
spring or counterbalance weight placed in any other position.

page_text: Our Invention may be modified by making the arms of equal length, but with
the upper ends curved towards the centre of the spindle, causing the balls at their
extremities to be in a more favourable position for exerting their force as the arms
expand, and the balls upon the lower ends of the arms approach the horizontal
position.
Another modification consists in making the lower ends of the arms of greater
length than the upper ones.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Richard Norfolk and Isaac Griffith Lloyd in the Great Seal Patent
Office on the 13th September 1877.
RICHARD NORFOLK, of Beverley, in the County of York, Managing Director of
the Beverley Iron and Waggon Company, Limited, and ISAAC GRIFFITH LLOYD, of
the same Place, Engineer. "AN IMPROVED GOVERNOR FOR STEAM AND OTHER
ENGINES."
The object of this Invention is to provide a sensitive governor uninfluenced in its
action by the principle involved in the ordinary or "Watt" governor, in which the
controlling power is reduced in consequence of the vertical height from the plane of
revolution to the point of suspension becoming less as the balls rise, and thereby
requiring a higher speed than is proportionately obtained to raise the balls to
another position. Also to be prompt in descending upon the slightest decrease of
speed of the engine, as opposed to the tardy action and tendency to hang on the
part of the ordinary governor.
The principle on which this improved governor is constructed is that of a lever
balanced at each end with balls of equal weight, the normal position of which is
horizontal.
And in order that our Invention may be fully understood and readily carried
into operation we will proceed to describe the accompanying Sheet of Drawings, in
which Fig. 1 represents one mode of constructing our improved governor. a, a, aro
levers or arms which are balanced at each end by the balls of equal weight b, b,
connected by the links'c, c, to the weight d, which slides upon the governor spindle
and actuates the forked lever e, working the throttle or other valve. Upon the
governor revolving, the arms a, a, tend to assume their natural or normal position,
that is to say, horizontal and with increasing energy as the speed increases. The
weight d is for the purpose of opening the throttle or other valve as the speed of
the engine decreases. The power exerted on the balls to cause them to descend and
open the valve, may be obtained by a counterbalance weight placed in any other
position, or a spring may be used instead of such weight.
Fig. 2 represents a modification of the same Invention. In this case the arms a
are of equal length, but the upper ends are curved towards the spindle, thereby
.causing the balls at their extremities to be in a more favourable position for
exerting their force as the arms expand, and the balls upon the lower ends of their
arms, approach the horizontal position.
Fig. 3 represents another modification of our Invention, the lower ends of the
arins a are of greater length than the upper ones, and the spring f coiled around the
spindle is used to assist the descent of the balls instead of the weight d, shewn in
Figs. 1 and 2.
Having thus stated the nature of our Inveution, and described three modifications
of the same, we wish it to be understood that we do not intend to limit ourselves to
the details given, and that we claim,―
First. A governor for steam or other engines having arms or levers balanced upon
a centre, and having equal weights at each end (or such weights may be unequal)

page_text: and connected to a sliding weight upon the governor spindlo, or a spring may take
the place of such weight.
And, Secondly. A governor having arms or levers with equal or unequal weights
at each end on opposite sides of a centre, and with either top or bottom portions of
the arms longer than the other, and connected to a sliding weight or spring, as
described.
In witness whereof, we, the said Richard Norfolk and Isaac Griffith Lloyd,
have hereunto set our hands and seals, this Tenth day of September, One
thousand eight hundred and seventy-seven.
RICHP. NORFOLK.
(LS.)
ISAAC GRIFFITH LLOYD. (LS.)