Improvements in Centrifugal Governors.
Year: 1892

page_text: Date of Application, 22nd Sept., 1892
Complete Specification Left, 20th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Centrifugal Governors.
I, ALFRED SHAW, of 23, St. Ann's Crescent Lewes, in the County of Sussex,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to centrifugal governors of the kind in which the balls or
weights are attached to spring arms.
In carrying out my invention I provide a hollow spindle to which motion is
adapted to be imparted by any suitable means, and to one end of this spindle I
attach two or more spring arms for carrying the balls or weights, which arms are
advantageously of C-shape and are attached to the spindle at one end only.
Within the hollow spindle is a sliding rod which at one end is jointed to the free
ends of the spring arms in such a manner that when during the rotation of the
governor the balls or weights fly outwards the said rod will be moved longitudinally
relatively to the spindle, which movement is utilized in a well known manner for
operating a throttle valve or the like.
In practice I find it advantageous to connect the free ends of the spring arms to
the spindle as follows, that is to say, I fix upon the spindle a cross bar upon the
two ends of which are sliding bushes or collars which are pivotted in bifurcations
on the arms. I thus reduce the friction between the parts to a minimum.
Dated this 22nd day of September 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Centrifugal Governors.
I, ALFRED SHAW, of 23, St. Ann's Crescent, Lewes, in the County of Sussex,
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 :-
My invention relates to centrifugal governors of the kind in which the balls or
weights are attached to spring-arms.
In carrying out my invention I provide a hollow spindle to which motion is
adapted to be imparted by any suitable means, and to one end of this spindle I
attach two or more spring-arms for carrying the balls or weights, which arms are
advantageously of C-shape and are attached to the spindle at one end only.
Within the hollow spindle is a sliding rod or spindle which at one end is jointed
to the free ends of the spring-arms in such a manner that when, during the
rotation of the governor, the balls or weights fly outwards the said rod will be
moved longitudinally relatively to the hollow spindle, which movement is utilized
in a well known manner for operating a throttle valve or the like.
In practice I find it advantageous to connect the free ends of the spring-arms to
the rod or spindle as follows, that is to say, I fix upon the said spindle bars upon
the ends of which are sliding bushes or collars which are pivotted in bosses on the
arms, the said bosses having openings for the bars to pass through.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawing, in which :-
Figure 1 is an elevation with spindle bearing in section of a centrifugal governor
constructed with two spring-arms according to my invention; and,
Dicuno 2 is a plan of the same.

page_text: Figures 3 and 4 are respectively an elevation and a plan of a detail drawn to an
enlarged scale.
Similar reference letters indicate similar parts throughout the drawing.
a is the hollow spindle, which is carried in a bearing 6 and is revolved by means
of a pulley or its equivalent (not shewn) attached to it at one end.
c, c are the
spring-arms which are advantageously of C-shape and connected to the spindle a
at one end through the medium of the block d and screws d', d', and e, e are the
balls or weights attached to the said arms by pins f, f.
9 is the rod or spindle sliding within the spindle a and jointed to the free ends
of the arms c, c, the said rod being caused to move longitudinally within the
spindle a when the balls or weights fly out under centrifugal action, which
longitudinal movement can be utilized for operating a throttle valve or the like.
h, h are the bars fixed to the spindle g, and i, i are the bushes or collars adapted
to slide upon the said bars and pivotted in the bosses j, j on the free ends of the
arms c, c, as shewn clearly in Figures 3 and 4 which represent one of the said bosses
detached. k, k are the holes in the bosses j, j for the bars to pass through, the
said holes being sufficiently large to allow the said bosses j, j to turn upon the
bushes or collars i, i under the centrifugal action of the balls or weights e, e and to
allow of any lateral movement of the said arms without coming into contact with
the said bars. By this construction of joints between the arms c, c and the spindle a
the friction thereof is reduced to a minimum.
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. A centrifugal governor comprising two spindles one of which slides within the
other, and spring-arms carrying balls or weights, one of the ends of the said arms
being fixed to one of the spindles while the other ends are connected to the other
spindle, substantially as described.
2. The improved centrifugal governor hereinbefore described and illustrated in
the accompanying drawing.
Dated this 20th day of June 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.