Improvements in Speed-regulating Governors, Specially. Suitable for, Electric-light and other. High-speed, Engines.
Year: 1897

page_text: *Date of Application, 11st Mar., 1897
..Complete Specification Left, 13th Nov., 1897 Accepted, 8th, Jan., 1898
Improvements in Speed-regulating Governors, Specially. Suitable
for, Electric-light and other. High-speed, Engines.
I, JAMES THOMPSON MARSHALL, of The Steam Plough Works, Leeds, in the County
of York, Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is the construction of speed-regulating governors in
such. a manner that they will be reliable and effectual in their action and at the same
time capable of being easily and readily regulated or adjusted to suit various
requirements.
'
A governor according thereto comprises according to one construction a suitable
spindle on which is mounted a sleeve having a feather-and groove or like connexion
therewith so as to rotate with the spindle but to be capable of endwise movement
thereon. This sleeve has a fixed collar some distance above its lower end; the lower
end of the sleeve is screw threaded and carries a nut, between which and the collar is
or are placed a ring or rings or equivalent device or devices by means, of which the
governor exerts its action. Above the collar the sleeve is loosely surrounded by a
coiled spring; which is preferably made of metal of rectangular cross section and has
a right hand twist, and on the upper end of which rests a metallic ring surrounding
the sleeve and guided thereon by ribs or the like so as to be free to move endwise
thereon but caused to rotate therewith. On this ring rests another coiled spring
similar to the one below it but preferably-having a left hand twist, and carrying on
its upper end an annular metallic plate (hereinafter called the pressure-plate) guided
by ribs or the like so as to be capable of endwise movement on the sleeve.
.
•
On the upper end of the 'sleeve there is screwed or otherwise fastened a plate which
may be dished and is provided with two or more forked bearings in each of which is
mounted a cranked lever the lower end of which carries a ball or the like of suitable
'size and weight whilst its other end is forked and has mounted in it a hardened
metallic runner arranged to bear against the upper surface of the flange of a cap
secured to the upper end of 'the governor spindle, or.. against a hardened metallic
plate inserted therein. Through this flange there are screwed regulating screws
which are suitably provided with check-nuts and whose lower ends.pass through
suitable openings in the dished plate and are adapted to bear against the pressure
plate, which may be provided with suitable recesses to receive them.
.
Although I have described 'the arrangement of two oppositely twisted springs
between the fixed collar: and the pressure plate, it-is obvious that the two springs
may have 'the same twist and that a single spring may, if desired; be used in their
stead.

page_text: Improvements in Speed-regulating Governors, Specially Suitable
for Electric-light-and other High-speed Engines.
I, JAMES THOMPSON MARSHALL, of The Steam Plough Works, Leeds, in the County
of York, 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 :-
The object of this invention is the construction of speed-regulating governors in
such a manner that they will be reliable and effectual in their action and at the same
time capable of being easily and quickly regulated or adjusted to suit various
requirements.
A governor according thereto is constructed as I shall proceed to describe with the
aid of the accompanying illustrative drawings, in which-
Figs. 1, 2, and 3 are respectively a vertical section, an elevation, and a plan of
such a governor, and Fig. 4 is a cross section corresponding to the line A B of
Fig. 1.
On a suitable spindle 1 is mounted a sleeve 2 having a feather-and-groove or like
connection therewith so as to rotate with the spindle but to be capable of endwise
movement thereon. This sleeve has a fixed collar 3 some distance above its lower
end 4, which is provided with a screw thread 5 and carries a nut 6 between which
and the collar is placed a ring 7 with pins 8 or an equivalent device by means of
which the governor exerts its action. Above the collar 3 the sleeve is loosely sur-
rounded by a coiled spring 9, which is preferably made of metal of rectangular cross
section and has a right-handed twist, and on the upper end of which rests a metallic
ring 10 surrounding the sleeve and guided thereon by ribs 11 or the like (see Fig. 4)
so as to be free to move endwise thereon but caused to rotate therewith. On this
ring rests another coiled spring 12 similar to the one below it but preferably having
a left-handed twist, and carrying on its upper end an annular metallic plate 13
(hereinafter called the pressure-plate) also guided by the ribs 11 or the like so as to
be capable of endwise movement on the sleeve 2. On the upper end 14 of the sleeve
there is screwed or otherwise fastened a plate 15 which may be dished as shown and
is provided with two or more forked bearings 16 in each of which is mounted on a
stud 17 a cranked lever 18 the lower end of which carries a ball 19 or the like of
suitable size and weight whilst its other end 20 is forked and carries within it, loosely
mounted on a stud 21, a hardened metallic runner 22 arranged to bear against the
upper surface 23 of the flange 24 of a cap 25 secured to the upper end of the governor
spindle 1, or, as shown, against a hardened metallic plate 26 inserted therein.
Through this flange 24 there are screwed regulating screws 27, which are provided
with heads 28 and check-nuts 29 and 30 and whose lower ends 31 pass through
suitable openings 32 in the plate 15 and are caused to bear against the pressure-
plate 13, which may, as shown, be provided with suitable recesses 33 to receive
them. For supplying lubricant to the sleeve 2 the upper end of the spindle 1 may
be provided with a suitable chamber and passage or passages 34 covered by a
cap 35.
When the governor revolves with the spindle 1, the balls 19 on the ends of the
cranked levers 18 are moved outwards by centrifugal force and consequently cause
the runners 22 in the forked ends 20 to bear against the flange of the cap 25 and
thereby to pull up or lift the sleeve 2 on the spindle 1 in opposition to the
springs 9 and 12 held between the collar 3 on the sleeve and the pressure-plate 13,
the valve of the engine being correspondingly moved by means of the ring 7 and the
pins or studs 8 or equivalent device. Alteration in the speed of the engine causes

page_text: the balls to extend further or recede and to produce a corresponding rise or fall of
the sleeve on the spindle.
Although I have described the arrangement of two oppositely twisted springs
between the fixed collar and the pressure-plate, it is obvious that the two
springs may have the same twist and that a single spring may, if desired, be used in
their stead.
When, however, the spring is made in one length and is being compressed by the
action of the levers, the collar 3 and the pressure-plate 13 are caused to rotate
relatively to each other to a certain extent, which is detrimental to sensitive
governing as it produces friction between the pressure-plate and the sleeve; by the
use of two springs of opposite twists and the insertion of the ring 10 between their
adjacent ends, this relative rotation is obviated.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Speed-regulating governors arranged and operating substantially as hereinbefore
described.
2. A speed-regulating governor comprising a spindle having a flange fixed thereon,
a sleeve having a feather-and-groove or like connexion with the spindle and having
mounted on its end adjacent to the said fixed flange two or more cranked levers each
of which has at one end a ball or the like and at the other end an antifriction-roller
that bears against the said fixed flange, and a spring or springs surrounding the
sleeve and bearing at one end against a flange fixed on the sleeve and at the other
against a pressure-plate having a feather-and-groove or like connexion therewith and
kept at a definite distance from the flange fixed on the spindle, the arrangement
being such that an increase in the speed of the governor will cause the antifriction-
rollers to bear with greater force against the flange fixed on the spindle and to
thereby draw the sleeve towards them in opposition to the action of the spring or
springs, substantially as described.
3. In a speed-regulating governor of the kind referred to, means for regulating
the pressure of the spring or springs, substantially as described and shown.
4. In a speed-regulating governor, the combination of two springs of opposite
twists, with or without an interposed metallic ring; for the purpose of preventing
relative rotation of the parts against which the remote ends of the springs abut.
5. Speed-regulating governors constructed, arranged, and operating substantially
as hereinbefore described with reference to and shown in the accompanying
drawings.
Dated this 15th day of November 1897.
R. E. P. CRAVEN,
Registered Patent Agent, 22 Victoria Chambers, South Parade, Leeds,
Agent for the Applicant.