Improved Means for Governing Steam or other Motors.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improved Means for Governing Steam or other Motors.
We, WILLIAM ARTHUR STEVENS, of 37 Hastings Road, Maidstone, Electrical
Engineer, REGINALD ALFRED BARKER, of Bockingford Cottages, Tovil,
Maidstone, Engineer, and WILLIAM JAMES SAVEALL, of Medway Iron Works,
Maidstone, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is more particularly to prevent the racing of marine
engines but the invention is applicable to various classes of engines or motors
in which it is desired to prevent the speed from exceeding a predetermined
maximum.
Briefly stated the nature of the invention may be said to consist in governing the
working by a second and independent motor the sole function of which is to effect
such regulation.
The invention may be carried out in the following manner :-
From some convenient part of the working motor a belt or gear is carried to a
pulley or gear mounted upon the end of a shaft. The other end of this shaft carries
a disc or arm to which it only binds by a regulated amount of friction.
Upon this disc or arm is an insulated block and an electrical contact piece-
between these but mounted on a separate and independent disc or arm driven by
the governing motor is a second contact piece. The two contact pieces. are in
electrical connection with a battery or other source of power but the circuit is only
completed when such pieces are in absolute contact. An electro magnet or
solenoid or any other suitable device is placed in the circuit and so connected as to
operate a valve or regulating device of the working motor when the circuit is
completed. With this construction the operation of the parts would be as
follows:-
―:
Assume that when the working motor is working at the desired maximum it
normally imparts 50 revolutions per minute to the shaft carrying the frictionally
operated disc, then the governing motor would be set for a constant speed of say 51
and this small excess would cause it to keep the contact piece upon its disc in
contact with the insulated piece upon the frictionally attached disc on the shaft
operated by the working motor at the same time the disc carrying the insulated
piece is caused to slip slightly on the shaft in the direction of rotation.
If for any reason the working motor should exceed the desired speed, then the
increased speed would be imparted to the shaft driven therefrom, and the contact
pieces coming together would complete circuit and the electro magnet would
operate the valve of the working motor say by cutting off steam or by opening
exhaust until the working motor returned to its normal speed when the contact
pieces would separate, breaking the circuit and permitting the valve by spring or
other action to return to its previous position.
A second apparatus of the character described above may be employed for
operating a brake to retard the engine or motor, such apparatus coming into
operation at a predetermined speed which may be greater or less than the speed at

page_text: which the first apparatus operates. Or a series of such apparatus might be
employed working various speed regulating devices.
Dated this 2nd day of September 1895.
PHILIP M. JUSTICE,
5 & 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicants.
Improved Means for Governing Steam or other Motors.
We, WILLIAM ARTHUR STEVENS, of 37 Hastings Road, Maidstone, Electrical
Engineer, REGINALD ALFRED BARKER, of Bockingford Cottages, Tovil,
Maidstone, Engineer, and WILLIAM JAMES SAVEALL, of Medway Iron Works,
Maidstone, Manufacturer, 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 more particularly to prevent the racing of marine
engines but the invention is applicable to various classes of engines or motors
in which it is desired to prevent the speed from exceeding a predetermined
maximum.
Briefly stated the nature of the invention may be said to consist in governing
the working by a second and independent motor the sole function of which is to
effect such regulation.
The invention may be carried out in the following manner, to clearly explain
which reference is made to the accompanying drawings in which
Fig. 1, is a side elevation partially in section indicating one form of apparatus.
Fig. 2 is a face view of the disc carried on the shaft operated by the governing
motor.
Fig. 3, is a like view of the disc carried by the shaft operated by the working
motor.
From some convenient part of the working motor a belt a or gear is carried to a
pulley b, or gear mounted upon the end of a shaft c. Loosely mounted upon the
inner end of this shaft is a disc d, or arm which only revolves with the shaft owing
to the friction between disc d, and friction block e, the latter being capable of
longitudinal movement on shaft c with which, however, it is caused to revolve by
being keyed or feathered thereon. The amount of friction between d and e may
be regulated by spring fand screw nut g.
The shaft c, is driven either direct or by a belt or gear by governing motor a¹,
which may be a small steam engine, an electro motor, or any other motor capable
of working at a constant speed. Shaft c¹, carries discs d¹ d² or arms each of which
carries a contact block h¹, h, adapted to make contact with corresponding block h,
on disc d. The method of completing electrical circuit which operates the valve
or other speed regulating device of the working motor will depend somewhat upon
whether the circuit must be made to keep the working motor at full speed or
whether the completion of the circuit is to close the valve, apply the brake, or in
other ways retard the speed of the working motor. As indicated in the drawings
the three contact pieces h, h³, and h³, are all in electrical connection with battery
or other source of power i, and between such battery and h³, is interposed an electro
magnet j, intended to keep the valve or device for regulating the speed of the
working motor full on when h and ³ are in contact. A second electro magnet or
suitable device k, is indicated as being placed between the battery i, and contact h',
and is intended to operate a brake or supplemental stopping device when hand h¹,
are in contact.
Assume that when the working motor is working at the desired maximum it

page_text: normally imparts 50 revolutions per minute to the shaft c, carrying the frictionally
operated disc d, then the governing motor would be set for a constant speed of
say 51, and this small excess would cause it to keep the contact piece ³, upon its
disc din contact with the piece h, upon the frictionally attached disc d, on the
shaft c, operated by the working motor at the same time such disc would be
caused to slip slightly on the shaft in the direction of rotation and as
circuit would be completed through h, h², the valve of the working motor would
be full on.
the
If for any reason the working motor should exceed the desired speed then the
increased speed would be imparted to the shaft c, driven therefrom, and the contact
piece h, would travel away from h³, thus breaking circuit and permitting the valve
or device operated by j, to close while if the excess speed still continued h and h³,
would come in contact completing the brake circuit. As soon as the speed of the
working motor drops to normal ' and h, would break contact, thus relieving the
brake, and 2 and h, would again come in contact, closing the electrical circuit
through the magnet j, and re-opening the valve.
If the valve of the working motor is normally full on then electrical connectiou
between 2, and battery i, may be omitted, h², practically becoming an insulated
piece and with this construction electro magnet k, may operate the valve or a
brake, open the exhaust or in other ways retard the working motor when h and h',
come in contact.
It will of course be understood that the parts are properly insulated say as
indicated by 1, and that by mounting contact piece 2, in the manner indicated it
may be set at such a distance from ', as may be desired. It will be also evident
that such contacts may be flexibly mounted so as to prevent any shock when they
come in contact with h, or that the latter may be so mounted.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is.
1st. The improved means of governing steam or other working motors by means
of a second and independent motor which maintains or breaks electrical contact
depending upon the speed of the working motor.
2nd. The improved means of governing steam or other working motors by means
of a second and independent motor, the two motors driving contact discs or arms
in such a manner that any excess speed of the working motor will complete the
circuit so as to operate a brake, or in other ways retard its own motion,
substantially as described.
3rd. The improved means of governing steam or other working motors consisting
of a shaft driven by such motor, a contact disc or arm loosely mounted thereon
and driven by a friction block attached thereto, a second shaft driven by the
governing motor and a contact disc or arm carried thereby and electrical
connections adapted to operate upon or retard the motion of the working
motor so soon as its speed exceeds the desired maximum, substantially as
described.
4th. The improved means for governing steam or other working motors,
substantially as described, and as indicated in the accompanying drawings.
Dated this 27th day of May 1896.
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicants.