Year: 1888

page_text: CHARLES FREDERICK AMOS 28 Albion Street Kingston upon Hull Engineer, do
hereby declare the nature of this invention to be as follows:-
.
-
This invention consists in an apparatus by which the motions of a hoisting appliance
are controlled, and is such that the movements of the hand of the attendant are
followed by the machine, moving when he moves and stopping when he stops by
which means it is impossible to produce motions other than those desired.
In carrying out my invention, I employ a wheel or winch handle to effect the
movement of the apparatus.
Upon the shaft of the wheel or handle is keyed a worm or screw which works in a
nut formed with a toothed pinion or wheel. The nut is also formed with a groove
into which takes a fork at the end of a lever.
The other end of this lever is connected with a controlling slide valve, which admits
steam to, or shuts it off from the engine, which may be a double cylinder engine of
any convenient kind.
On the hoisting drum shaft, or in any other convenient position, will be mounted a
toothed wheel, which will gear with the pinion on the nut..
When the engine is stationary, both ports of the controlling valve case will be
closed.
Upon turning the wheel or handle, the nut will be shifted longitudinally on the
shaft by the screw, the nut being prevented from rotating by the drum. This will
rock the lever, and open the steam valve.
The engine will then work, and the hoisting drum will be rotated, and will cause
the nut to rotate, and so long as the screw is rotated as well by the wheel, the
control valve will remain open.
Directly the movement of the wheel is stopped, however, the screw is stopped, but
the valve remaining open, the engine continues to work, and by its connection with
the nut, causes the nut to work in or out upon the screw, and so rock the lever, so as
to close the steam valve.

page_text: By these means, the working and the speed of working of the apparatus will be
regulated by the attendant with facility, and with the utmost precision, as the apparatus
will only move as and when the attendant moves the wheel or handle.
Dated this 29th day of October 1888.
NEWTON & SON,
Agents for the Applicant.
•
1
CHARLES FREDERICK AMOS, of 28 Albion Street, Kingston-upon-Hull, Engineer 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 consists in a novel construction of hoist, the action of which will be
controlled by the movements of a hand wheel worked by the attendant, motion being
communicated to the hoisting apparatus when he moves his hand, and arrested when
he stops, so that it will be impossible to produce motions other than those
desired.
In the accompanying drawings, I have shown in side elevation at Fig. 1, a hoist or
crane constructed according to my invention, Fig. 2 being a rear elevation. Fig. 3
shows, in side elevation, partly in section, and on an enlarged scale, certain details
which will be particularly referred to hereafter, and Fig. 4 shows, partly in section, a
modified arrangement of the parts shown in Fig. 3.
:
Referring now to Figs. 1 and 2, A is the frame of the hoist or crane, which may be
of any convenient construction, and mounted in the usual manner. B is the jib, and
C the hoisting drum. E is the hoisting engine, and F the tailing engine, which are
placed on opposite sides of the frame A. I prefer to employ engines having two
cylinders E E, F F, with a valve box E F between the two cylinders, which
boxes E F will be connected with the steam pipe in the usual manner.
crank shafts of the two engines.
G G are the
The shaft of the hoisting engine E has at one end a worm G', which gears with a
worm wheel C¹ on the axle C² of the hoisting drum C, and at the other end a
pinion G².
The shaft of the tailing engine F is provided at one end with gearing which com-
municates motion to the tailing gear (of any suitable construction), and has at the
other end a pinion G2, as in the former case, the object of which pinions will be
presently described.
I

page_text: Suitably carried in bracket or other bearings in both the hoisting and tailing
engines, is a shaft H (see also Fig. 3), which is arranged to be turned by a hand
wheel H¹.
Near the front end of this shaft is mounted a screw H2, which works in a female
screw formed in a sleeve I, also mounted on the shaft H. Upon the front end of the
sleeve is mounted a tooth wheel J, which gears with the pinion G, and on the rear
end is a flanged nut J¹ to receive the forked arm K' of a bell crank lever K, suitably
pivotted to a bracket on the engine frame. The other arm of this lever K is connected
with a steam controlling valve E2 of the engine, contained in the box E', in which box
also are piston valves E*, worked by excentrics on the shaft G.
When it is desired to work the hoist, the attendant turns the hand wheel H¹ in one
direction or the other. The movement of the wheel H', communicated to the screw H²,
causes the sleeve I to work in or out upon the shaft H. The lover K is thus rocked
on its pivot, and motion is communicated to the steam controlling valve E2 (shown
clearly at Fig. 4) in one direction or the other; steam is admitted to one of the
cylinders, and the engine commences to work. As the crank shaft G rotates, tho
pinion Grotates, and in its turn actuates the wheel J. Now, as the wheel J is
mounted on the sleeve I, the movement of the wheel will screw the sleeve back again
to its normal position (Fig. 3), and will cut off the steam. To avoid this, the hand
wheel must be continuously turned, the effect of which will be to keep the sleeve in
its advanced position, and the steam valve open.
In this way the action of the engine will be dependent on the movement of the
hand wheel by the attendant, commencing to work when he moves, stopping when he
stops, and working at any speed according to the speed at which the attendant rotates
the handle, and so turns on more or less steam; or in other words keeps the controlling
valve more or less open.
In Fig. 4, I have shown a slight modification in the arrangement of the starting
and stopping gear, the arrangement of the steam engine and controlling valve being
shown on an enlarged scale, and displayed for convenience of reference.
E represents one cylinder, El a slide valve; E the controlling valve. The con-
trolling valve E may be an ordinary D valve enclosed in a suitable casing, provided
with steam inlet and exhaust, and two steam ports in connection with the slide valve
cases of the engine.
His a hand wheel, mounted on a shaft H, on which is also mounted a screw H².
This screw works in a nut M, provided at its back with a broad toothed extension M³,
which acts as a pinion, and the nut is formed with a peripherical groove to receive a
ring N, to which is conveniently pivotted the forked end of a straight lever O. This
lever O is suitably pivotted to some part of the frame of the apparatus, and its other
end is connected to the controlling valve E².
Cis the axle of the hoisting drum, to which motion is communicated by the engine
in any convenient manner, and upon this shaft is keyed a toothed wheel J, which gears
with the pinion M₁ of the nut M.
The motion of the apparatus is caused and regulated by the attendant turning the
hand wheel H' in one direction or the other, as before described.
Immediately the wheel H¹ is stopped by the attendant, the screw H2 will also stop,
and the nut M then continuing to rotate under the influence of the wheel J (which is
worked by the engine), will be worked in or out upon the screw, and will rock the
lever until the controlling valve E³ shuts off the supply of steam to the engine, and
the movement of the hoisting apparatus will thus be arrested.
As the pitch of the screw H' is coarse, the stopping of the hand wheel and the
action of the controlling valve will be almost simultaneous in both arrangements.
The tailing engine will be controlled in the same way as the hoisting engine, and
lowering will be effected by the engine as well as hoisting.
It will thus be seen, that by my improved hoisting appliances, a band or other
brake and clutch mechanism for throwing the drum in and out of gear with the
engine will be rendered unnecessary, and the descent of the load may be arrested at

page_text: any moment by stopping the movement of the hand wheel H¹ of the hoisting
engine.
I would here remark that I do not wish to confine myself to the exact details of
starting and stopping gear above described, as this may be varied without departing
from the nature of my invention; for example, I may use what is known as a hunting
gear of three bevel wheels, Nos. 1 and 3 being mounted opposite one another on
separate shafts, with No. 2 between them, mounted on a stud axle, which is mounted
so as to be capable of being rocked on the shaft of No. 1. No. 1 is in connection
with the hand wheel, and when turned, rolls No. 2 round No. 3, and No. 2 stud axle
being connected with the controlling valve, pulls it over as No. 2 wheel rolls, and
opens the valve. This starts the engine, and No. 3 (which is in connection therewith)
moving, rolls No. 2 back on No. 1, and so closes the valve, unless No. 1 is continuously
rotated at the same speed as No. 3.
Or a worm and worm wheel may be used. The worm axle will be in con-
nection, at one end, with the valve, and will carry the hand wheel at the other, and
the worm wheel will be in connection with, and driven by the engine. When the
worm is turned, it advances by screwing (the worm wheel being stationary); shifts
the axle longitudinally, and pulls over and opens the valve. When the engine starts,
the worm wheel rotates, and closes the valve by shifting the axle longitudinally in the
reverse direction, the worm then acting as the teeth of a rack, unless the worm be
continuously rotated by the hand wheel, to keep the axle in the advanced position and
the valve open.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. An improved hoist or crane, the working of which (whether hoisting, lowering,
or "tailing") depends upon the continuous movement of a hand wheel or wheels as
described.
2. The hoisting appliances as herein described and shown.