A NEW OR IMPROVED METHOD OF REGULATING AND CONTROLLING THE MOTION OF VARIOUS Kinds of Machiɛɛy
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Henry Defty at the Office of the
Commissioners of Patents, with his Petition, on the 2nd March
1875.
I, HENRY DEFTY, of Middlesbrough, in the County of York, Engineer,
do hereby declare the nature of the said Invention for "A NEW OR
IMPROVED METHOD OF REGULATING AND CONTROLLING THE MOTION OF VARIOUS
Kinds of Machiɛɛy,” to be as follows :—
"
This Invention has for its object to regulate and control the motion of
machinery, whether applied to hauling, pumping, locomotives, hoists,
drops, and the like, so as to attain a greater degree of security against
danger.
In carrying out my said Invention in practice, as applied to the
hoisting apparatus working at the mouth of the shaft of a coal pit or
other mine, I so fix two levers or series of levers, rods, wires, ropes, and
the like (arranged and fixed according to the circumstances of each
particular case) to the post or framing which supports the gin, or to an
independent framing erected for the purpose, that the tub, cage, or

page_text: truck, on arriving at or near the place of stoppage lifts one end of one of
the said levers and thereby closes the throttle valve of the steam engine
to which the said lever is connected, and thus shuts off the steam. At
or about the same time the rising tub or other vehicle lifts the other of
the said two levers, which lever is connected with and operates the 5
hand gear of the said engine and immediately reverses the motion of
the engine. It may also be arranged to apply the break at the same
time by an independent connection therewith of levers, ropes, rods,
and the like, so that the rising tub or other vehicle or thing is stopped
and safely landed without risk of accident or damage or injury to 1
the working machinery, and without the interference of those in charge
thereof.
By varying the arrangement of my improved apparatus, it can be
adapted and applied to most kinds of machinery, and to operate the
different descriptions of valves, cocks, sluices, and the like.
1
The locomotive arrangements are by worm screw or pinion actions
fitted on the axle of the engine and working in wheels arranged to move
the required distance, or by levers acting against blocks or switches
placed in suitable localities and positions, and so fixed and fitted as to
catch or strike the said levers, and thus graduate the supply of steam 2
and the speed, and finally reverse the engine's motion at its destination,
a station, or other desired place, as previously described.
In order to secure the control of the motion and to regulate the speed
of any steam engine, whether stationary or locomotive, by the person or
persons in charge thereof, I fix a suitable hand lever to my improved 2
apparatus, or the latter may be operated by a hand wheel and worm
screw lever motion, or by a toothed wheel and pinion arrangement, by
any of which means an ordinary person can operate cither or both
throttle valve and reversing gear of engines. In the former case the
supply of steam can be regulated to the greatest nicety and with perfect a
ease instantaneously.
It is evident that steam engines and the machinery operated thereby,
being thus placed under such thorough control, much damage and many
serious injuries will be prevented, and consequently a great saving of
time and money will be effected. Accidents can then only occur by 3
neglect in adjusting my apparatus, which is very simple, to the valve or
hand gearing or break of engine.

page_text: My improved apparatus in no way interferes injuriously with the
power or general working of either engine or machinery.
In the case of the wheel and pinion motion, I place a clutch or pin stop
upon the said wheel to stop its motion at the proper point, as may be
required in either operation.