Improvements connected with Apparatus for Governing the Speed of Engines Direct from their Crank Shafts.
Year: 1892

page_text: Date of Application, 30th Sept., 1892
Complete Specification Left, 30th June, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with Apparatus for Governing the Speed
of Engines Direct from their Crank Shafts.
We, JOHN RICHARDSON, of the Firm Robey & Co., Globe Works in the
City and County of Lincoln, Engineer, and JOHN BUCK, of the same place,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for object, governing the speed of an engine direct from the
crank shaft, said apparatus being affixed to and revolving with said shaft.
The invention relates to shaft governors, and is an improvement upon the system
patented by one of the inventors in 1869, No. 3483 inasmuch as the movement of
the eccentric is effected by means of wedges. The improvements consist in so
disposing the wedges in connection with the driving plate that the whole can be
contained within the length of a few inches, and thus made admissible, whereas the
wedge motion previously patented could not be owing to the length of the governor.
The motion obtained is exactly the same, the eccentric being caused to move in a
straight line so as to secure either a constant lead, or may be so disposed as to
give a larger lead with a long admission diminishing to zero when the admission is
In all cases the movement is a true one.
zero.
The way the motion is obtained is by making a slot or projection in the eccentric
itself in a line with its transverse motion, and mounting it upon a plate, which
plate is keyed to the crankshaft. The eccentric slides along this slot and is driven
by the plate through the slot, so that the drive is positive and there is no strain
due to them upon the governor.
Two wedges are caused to slide upon the other side of the plate transversely to
the motion of the eccentric, and projections upon the eccentric engage in these
wedges.
The wedges are each attached to the free end of an oscillating weight, the other
end being fixed to a stud. The weight is maintained in one position by a strong
spring and in that position gives full travel to the eccentric. On the revolution of
the engine, the centrifugal force causes the weights to fly outwards moving with
them the two wedges, and thus effecting the transverse motion of the eccentric
sheave.
The novelty of the invention consists in the manner in which the wedges are
arranged in connection with the weights upon a plate for the purpose of producing
a true transverse motion of the eccentric.
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001
"
1000
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said John Richardson and John Buck.
COMPLETE SPECIFICATION.
Improvements connected with Apparatus for Governing the Speed
of Engines Direct from their Crank Shafts.
We, JOHN RICHARDSON, of the Firm Robey and Co., Globe Works in the
City and County of Lincoln, Engineer, and JOHN BUCK, of the same place,
Engineer, do hereby declare the nature of this invention and in what manner the
'

page_text: same is to be performed to be particularly described and ascertained in and by the
following statement :—
This invention has for object, governing the speed of an engine direct from the
crank shaft, said apparatus being affixed to and revolving with said shaft.
The invention relates to shaft governors, and is an improvement upon the system
patented by one of the inventors in 1869, No. 3483 inasmuch as the movement of
the eccentric is effected by means of wedges or sliders. The improvements consist
in so disposing the wedges or sliders in connection with the driving plate that the
whole can be contained within the length of a few inches, and thus made admissible,
whereas the wedge motion previously patented could not be owing to the length of
the governor.
The motion obtained is exactly the same, the eccentric being caused
to move in a straight line so as to secure either a constant lead, or may be so
disposed as to give a larger lead with a long admission diminishing to zero when
the admission is zero. In all cases the movement is a true one.
The way the motion is obtained will be clearly understood by the annexed
drawings, in which
Figure 1 is an open face view of a governor fitted on a shaft.
Figure 2 is a transverse section of a modified but similarly acting governor, of
which Figure 3 is a face view, and Figure 4 is a face view with the moving parts
removed to more clearly show the extreme position of the eccentric plate.
Referring to Figure 1, it will be seen that we make a slot or slots, or
projections A, A, in the eccentric sheave B in a line with its throw motion, and
mount it upon a plate C which is keyed to the crank shaft C¹.
The eccentric under the action of the hereinafter described parts, slides along
the slots A, A, and is driven or rotated by the plate C through the slots by means
of the pins D, D, so that the eccentric is driven positively, and there is no strain
due to such drive put upon the governor.
The manner in which the eccentric is operated to vary the cut off due to increase
of speed or load, is as follows, that is to say ;-Two wedges E, E, made with
oppositely inclined slots F, F, are caused to slide in grooves G, G, formed in the
plate C upon the side opposite to that of the eccentric, said grooves G, G, are
formed transversely to the throw motion of the eccentric, and projections H, H,
upon the eccentric sheave B engage the wedges E, E, through the before mentioned
slots F, F.
Each wedge is attached to the free end of an oscillating weight I, the other end
being pivoted upon a stud J, and it is maintained in one position by a strong
spring K acting upon the tail piece L, and in this position it gives full travel to
the eccentric.
On the revolution of the crankshaft of the engine, the centrifugal force causes
the weights I, I, to fly outwards, moving with them the wedges E, E, which by the
slots F, F, and projections G, G, move the eccentric in a straight line at right
angles to the crank, and thus altering the stroke of the eccentric, and consequently
the travel of the slide valve, to which it is connected by a rod in the ordinary
manner to cut off steam at an earlier part of the stroke, and work same more
expansively.
M, M, are blocks that connect the wedges E, E, to the weights I, I, and are so
disposed as to allow or give to the arc movement of said weights.
With reference to Figures 2, 3, and 4 of the annexed drawings, the general
principle of action is the same, but instead of the part corresponding to the
wedges E, E, having an up and down movement to alter the throw of the eccentric,
it is caused to rotate under the action of the weights I, I, which are connected to it
by the links M, M, and this rotation, by means of the oppositely arranged
slots F, F engaging with projections H, H on the eccentric sheave, moves it in a
straight line at right angles to the crank of the engine the same as described with
reference to Figure 1, but in this case, the sheave is arranged in such a position
relatively to the movement caused by the wedge E that its angular position on the

page_text: shaft is varied. It may however be arranged in the same relative position shown
in Figure 1, in which case, its angular position relatively to the crank is unchanged,
but the throw of the eccentric is varied.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The arrangements described and shown in the drawings, for altering, or
varying the throw and angular position of the eccentric controlling the motion of
the slide valve of engines.
2. The method of controlling or governing steam engines by moving the eccentric
in a straight line at right angles to the crank of said engines by means of two
wedges or plates E, E, having oppositely inclined slots or equivalents F, F,
operated by weights I, 1, as described and shown with reference to Figure 1.
3. The method of controlling or governing steam engines by moving the eccentric
in a straight line at right angles to the crank of said engines by means of a plate
having two oppositely disposed curved slots operated in the manner described and
represented in Figures 2, 3, and 4 of the annexed drawings.
AB
1000
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said John Richardson and John Buck.