A Jet Governor for Hydraulic Impact Motors.
Year: 1894

page_text: Date of Application, 2nd Oct., 1894
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Complete Specification Left, 24th June, 1895-Accepted, 17th Aug., 1895
PROVISIONAL SPECIFICATION.
A Jet Governor for Hydraulic Impact Motors.
We, WILLIAM CARTER, Engineer, of 32 King Street, Chester, and THE
HYDRAULIC ENGINEERING Co. LD. Engineers, of Charles Street, Chester,
do hereby declare the nature of this invention to be as follows :-
Our invention relates to means of automatically regulating the jet acting on the
blades or vanes of a hydraulic impact motor. For this purpose, we make the jet
tube internally coned, and provide within it a conical spindle which can be slid
to and fro, so as to vary the volume of the issuing jet, by means of a nút turning
between stationary cheeks on a screwed part of the spindle, which is itself prevented
from turning. On the nut is a worm wheel worked by a worm on the spindle of a
friction bevil wheel driven in the one or the other direction according as the one or
the other of two friction bevil pinions is pressed against it, both these pinions being
on the spindle of a centrifugal governor driven from the impact wheel.
Thus, as the speed may tend to vary, the conical spindle is advanced or retracted,
varying the volume of the jet so as to maintain the speed nearly constant. The
worm and the governor and its friction gear are mounted on a slide which, by means
of an excentric handle, can be moved a little so as to throw the worm out of gear
when desired. In order to balance the fluid pressure tending to force back the
conical spindle, we form it with an enlarged part or collar presenting an annular
equivalent area on which the pressure acts tending to force it forwards. Thus the
governor has only to overcome the friction of the moving parts.
Dated this 2nd day of October 1894.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
A Jet Governor for Hydraulio Impact Motors.
We, WILLIAM CARTER, Engineer, of 32 King Street, Chester, and THE
HYDRAULIC ENGINEERING Co. LD. Engineers, of Charles Street, Chester,
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:-
Our invention relates to means of automatically regulating the jet acting on the
blades or vanes of a hydraulic impact motor. For this purpose we construct the jet
nozzle and combine with it regulating gear as we shall describe referring to the
accompanying drawings.
Fig. 1 is a side view of the impact wheel and supports for the nozzle which is
shewn in longitudinal section.
Fig. 2 is an end view.
We make the jet tube A internally coned and provide within it a conical
spindle B which can be slid to aud fro, so as to vary the volume of the issuing jet,
by means of a worm wheel C the boss of which turning between stationary cheeks
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page_text: forms a nut working on a screwed part of the spindle, which is itself provented
from turning by the end of a screw D engaged in a slot of the spindle.
The worm wheel is worked by a worm W on the spindle of a friction bevil
wheel N driven in the one or the other direction according as the one or the other
of two friction bevil pinions Ois pressed against it, both these pinions being on the
spindle P of a centrifugal governor R driven from the impact wheel J.
Thus, as the speed may tend to vary the worm wheel C is turned in the one or
the other direction, and the conical spindle B is advanced.or. retracted, varying the
volume of the jet so as to maintain the speed nearly constant. The worm W aud
the governor R and its spindle P and the friction gear NO, are mounted on a
slide G which, by means of an excentric boss of a handle H can be moved a little
so as to throw the worm Wout.of gear with the wheel C. when desired. When
the worm is out of gear, the spindle B can be turned by hand applied to the hand,
wheel M which is attached to the worm .wheel C.
In order to balance the fluid pressure tending to force back the conical spindle B
we form it with an enlarged part or collar E presenting an annular equivalent area
on which the pressure acts. tending to force it forwards. For this purpose we
provide in the spindle B a passage indicated by the dotted lines forming
communication from a space open to the pressure supply S to a space surrounding
the enlargement which as well as the smaller part of the spindle to the left of the
enlargement, works through.cup leathers or other suitable packing.
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:
B
Thus, the spindle B being balanced in respect of pressure, the governor has only
to overcome the friction of the nioving parts.
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:
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A jet governor for hydraulic impact motors constructed and operating substan-
tially a as described with reference to the accompanying drawings.
Dated this 24th day of June 1895.
ABEL & IMRAY,
Agents for the Applicants!