Improvements in Governors for Steam and other Engines and the like.
Year: 1891

page_text: Date of Application, 8th July, 1891
Complete Specification Left, 25th Aug., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Governors for Steam and other Engines and
the like.
I, CHARLES TUCKFIELD, of Albany, Western Australia, at present residing at
Dalmon Cottage, Hounslow, in the County of Middlesex, Miller, do hereby declare
the nature of this invention to be as follows:-
This invention is applicable to steam and other engines, windmills, turbines
and other motive power engines and may be carried out as follows:-
Upon a shaft is a screw thread with which engages a nut carrying vanes adapted
to operate in the air or other suitable fluid. The fan which is produced may be a
special one appertaining to the governor or where an existing ventilating or other
fan centrifugal pump.or the like is available such fan or pump may be used in' place
of the special fan. The nut is so arranged that it cannot travel to any appreciable
extent upon the shaft but can merely revolve upon it or allow the shaft to revolve
within it so that the longitudinal motion due to the screw thread will be imparted
to the shaft and not to the nut. In some cases it is desirable to employ plain or
grooved friction discs or equivalent to increase the friction between the nut and
the shaft.
The shaft is driven in any convenient manner from or by the motor engine and
is so arranged as to have free longitudinal movement within the limits required';
the shaft is connected with the throttle valve or other controlling mechanism of the
motor engine.
In use the shaft is driven as above explained and carries the nut round with it
so long as the friction between the two is not overcome; when this takes place the
nut will revolve more slowly than the shaft which will then be caused to move
longitudinally within the nut by the operation of the screw thread and in doing so
closes the throttle valve or otherwise operates to control the engine. When the
speed of the shaft becomes less than that of the nut the latter will be moving faster
than the shaft and will consequently cause it to travel longitudinally in a direction
opposite to that which it formerly adopted.
Dated this 8th day of July 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Governors for Steam and other Engines and
the like.
I, CHARLES TUCKFIELD, of Albany, Western Australia, at present residing at
Dalmon Cottage, Hounslow, in the County of Middlesex, Miller, 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:-
.
This invention is applicable to steam and other engines, windmills, turbines and
other. motive power engines and may be carried out as follows:-
·
=
Upon a shaft is a screw thread with which engages a nut carrying vanes adapted
to operate in the air or other suitable fluid. The fan which is employed may be a
special- one appertaining to the governor or where an existing ventilating or other
fan centrifugal pump or the like is available such fan or pump may be used in
place of the special. fan. The out is so arranged that it cannot travel to any
appreciable extent upon the shaft but can merely revolve upon it or allow the
Pone Ad

page_text: shaft to revolve within it so that the longitudinal motion due to the screw thread
will be imparted to the shaft and not to the nut. In some cases it is desirable
to employ plain or grooved friction discs or equivalent to increase the friction
between the nut and the shaft..
The shaft is driven in any convenient manner from or by the motor engine
and is so arranged as to have free longitudinal movement within the limits
required; the shaft is connected with the throttle valve or other controlling
mechanism of the motor engine.
In use the shaft is driven as above explained and carries the nut round with it
so long as the friction between the two is not overcome; when this takes place
the nut will revolve more slowly than the shaft which will then be caused to move
longitudinally within the nut by the operation of the screw thread and in doing so
closes the throttle valve or otherwise operates to control the engine. When the
speed of the shaft becomes less than that of the nut the latter will cause the
former to travel longitudinally in a direction opposite to that which it formerly
adopted.
In the accompanying drawings :—–
Figure 1 is an elevation partly in section of a governor constructed according to
this invention.
Figure 2 is an eud elevation of the shaft and arm for taking off the motion to
the governor.
Figure 3 is a face view of one form of friction disc.
Figure 4 is an elevation partly in section of the apparatus applied directly upon
the shaft of the motor to be governed, and
Figure 5 is a plan partly in section of mechanism by which the movement of the
worm may be taken off.
A is the shaft screwed for a sufficient portion of its length A and carrying the
nut B into which are screwed the vancs Ĉ by their spindles C which may be locked
in any required position by the lock nut C. Upon the shaft A is the pulley D
preferably having a key-way cut in it for the passage of the feather A' by which
arrangement the pulley will carry the shaft round with it but the shaft can
reciprocate longitudinally through the pulley. This pulloy D may be driven in
any convenient manuer from or by the motor which the governor is to control or
other suitable means may be employed for giving motion to the shaft A the
important feature being that the speed of A must vary with that of the motor to
be controlled. The uut is prevented from travelling along the worm A² by the
tubes E secured to the framing F which carries the whole movable part of the
apparatus.
The end of the shaft A remote from the pulley D is reduced and carries a
sleeve G which is prevented from escaping from the shaft by the fixed collar H
secured upon the end of the shaft. The sleeve G carries the trunnions G' which
pass through slots I in the jaws of the arm J which may be carried upon the
shaft K and the motion from that taken direct to the throttle valve lever or
utilized in any other convenient manner. Guides L are secured upon the framing
and have slota L' in which the trunnions G' travel as the shaft reciprocates
longitudinally. Any other suitable means may be employed for taking off the
motion of the shaft A.
In some cases it is desirable to load the nut to prevent the vanes from travelling
too quickly or to increase their power in causing the worm to travel, or even to
dispense with the vanes altogether, and for this purpose I may employ friction discs
either plain or grooved such as indicated in Figure 1 or 3. These discs E' are
shown forming part of or connected with the tubes E and where the annular
ridges and grooves E* are employed the nut B will be similarly grooved to
correspond; in many cases however plain faces upon the discs E' and the nut B
will be sufficient for the purpose, and in some instances the friction discs may be
dispensed with altogether, their employment in either form depending upon the
work to be performed.

page_text: the motor.
Figures 4 and 5 show means for applying this invention directly to the shaft of
In these figures M represents the main or driving shaft of the motor
and N is a sleeve having a slotted key-way working upon the feather M' secured in
the shaft M. This sleeve N carries the screw thread, N' and is adapted to travel
longitudinally upon the shaft M. The nut ( carries the vanes Cas-before and is
prevented from travelling longitudinally by the bolts P screwed through the sleeve
collar P' and into the split ring P² which works in a circumferential groove in the
nut (.
The sleeve collar is secured upon the shaft M in any convenient
manner as by set screws P³. The sleeve N has projecting arms N' which carry
a circular head N³ having an annular groove N In a bracket projecting
from any suitable fixed part of the apparatus is carried a shaft R upon which
is fixed the fork or forked arm S each member of which has a stud or projection 'S¹
which engages with the groove N of collar N³. The operation is substantially
the same as that described in reference to Figure 1 the sleeve in Figure 4 taking
the place of the shaft A in Figure 1, and the movement being carried to the
throttle valve in any convenient mauner from the shaft R the arm S or otherwise
as required. By this arrangement the governor can be applied directly to the
shaft of the motor or to any intermediato shaft driven from the motor so as to
participate in the variations of speed of the motor.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I am aware that governors embracing vaues, nut and screw have before
now been employed' and that I make no general' claim to such apparatus but what
I claim is :-
1. In a governor such as described the combination with the vane-carrying or
other nut such as B or 0 of friction discs substantially as described.
2. In a governor such as described the combination with the vane-carrying or
other nut such as O of a sleeve such as N N' to which rotary motion is imparted
by the shaft of the motor substantially as described and illustrated in Figure 4 of
the accompanying drawings.
3. The combination with the shaft of a steam engine, windmill, turbine or other
motor of a sleeve such as N N' and nut such as O substantially as and for the
purpose described and illustrated in the accompanying drawings.
4. The combination with the main or driving shaft of a steam engine windmill
turbine or other motor of a governor such as described situated upon and actuated
directly by the said shaft substantially as described.
5. The employment of a ventilating or other fan or centrifugal pump as a
governor for marine or other motive power engines.
Dated this 21st day of August 1891.
CHARLES TUCKFIELD,
W. P. Thompson & Boult,
Agents for the Applicant.