Improvements in Hydraulic Intermittent Motors.
Year: 1894

page_text: Date of Application, 8th Oct., 1894
Complete Specification Left, 8th July, 1895-Accepted, 31st Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Intermittent Motors.
.
GEORGE THRELFALL, Engineer, 3 Portman Mansions, Baker Street,
London, W., do hereby declare the nature of this invention to be as follows — )
This invention has for its object the automatic operating of valves doors, blast
gates, feed hoppers, electric contacts &c. intermittently, in which the periods of
cessation require to be of equal, unequal, or variable duration, and relates more
particularly to the operating of that class of valves &c. used in, and connected with,.
gas producers, generators, gas holders, regenerative furnaces, scrubbers, washers,
filters &c., and also for feeding material, fuel &c. to or from the same or similar
purposes, in which the influent or effluent gases, liquids, material, fuel &c. are
required to pass into, or through, the said producers &c. at certain intervals or
during certain periods of greater or less duration, and to continue working
automatically.
"
The accompanying drawing shews a hydraulic intermittent motor .con-
structed according to my invention, which will be moro rendily understood from the
following description.
Upon the shaft A (by which the valves etc. above mentioned are operated) is
fixed a double quadrant lever B, having suitable chains C. C. attached thereto, the
lower ends of the chain are fastened to, and suspend the vertical rods D. D. which
are held in position by top and bottom guides E. E. & F. F. to each. of these rods.
are attached cylindrical buckets. G. G. fitted with suitable outlet valves H. H.
which regulate the discharge of water into the receiving tank I. underneath.
Attached to the guides E. E. are fulcrum pins which support the pawl
levers K. K. K. K. which cross the vertical rods D..D. ou either side, from the
ends of these levers descend the small rods. L. L. L. L. which are coupled to the
tubes M. Mthrough which the vertical rods pass, thus forming substantial guides,
the floats N. N. are secured to the tubes M. M. by clamping screws at O. O.
which allow them to be raised or lowered to regulate the quantity and weight of
water in the buckets.
The water is led into the buckets by pipes P. P. which communicate with the.
3 way cock R which directs the flow of water alternately to cach of the buckets,:
the cock R being operated automatically from the shaft A. through the levers and
rod.S.S. S.
At any suitable part of the water pipe is a valve T. by which the flow of water:
is regulated and the periods of motor timed, as required.
In operation the pawls K. support each: vertical rod, and bucket alternately by,
engaging the shoulder of the said rod, until the water in the bucket rises and lifts
the float sufficiently to open the pawls and. disengage the said rod and bucket which
in its descent oscillates the shalt A. lifts the opposite rod and bucket and alters the'
How of water from the descending to the ascending bucket; just before the bucket.
completes its down stroke: the valve H. comes to rest on the rubber pad U, thus!
opening the valve during the completion of the down stroke of the bucket, 'and
releasing the water, into the receiving tank, the valve closing again during the next:
up stroke.
11 AA
t
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page_text: It will be readily understood that the operation above described is repeated.
alternately with each bucket, by which the shaft A. is oscillated, the period of each
oscillation being regulated by the valve T.in the water pipe.
Dated this Sixth day of October 1894.
Improvements in Hydraulic. Intermittent Motors.
I, GEORGE THRELFALL, of 3ª, Portman Mansions, Baker, Street, London W.,
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 audiby
the following statement :-
1
i
This invention has for its object the automatic operation of valves, doors, blast-
gates, feed-hoppers, electric contacts, and other devices requiring to be intermit
tently operated, whether the periods of cessation be required to be of equal,
unequal, or variable duration; and it relates more particularly to the operation in
an automatic manner of that class of valves. or equivalent devices that are used in
or in connection with gas-producers, generator-gas holders, regenerative furnaces,
sorubbers, washers; filters and like apparatus for the purpose of feeding material,
fuel, etc.ito or delivering it from the same at certain intervals and during certain
periods of greater or less duration.
:
In the drawings filed with my Provisional Specification, the left-hand figure and
the middle figure are elevations at right angles to one another, and each partly in
section, showing a hydraulic intermittent motor constructed according to my
invention, the remaining figure being a plan thereof.
.
•
Upon a shaft A, that is connected with the valve or other body to be
intermittently operated, is fixed a double sector lever B to which are
attached suitable chains C whose lower ends are fastened to two vertical
rods. D that. are held in a vertical position by top and bottom guides E and F.
To cach of these rods is fixed a cylindrical bucket G fitted with a suitable outlet-
valve H, which regulates the discharge of water from the respective bucket
into a tank I. Attached to each guide E are. pins forming fulcra for a pair of
levers K having pawl-like. upper ends and arranged to cross each other and the
corresponding rod D, as shown. The longer arins of these.levers are connected by
rods L to a tube M through which the corresponding vertical rod D.passes and
thus forms a substantial guide for the said tube. A float is secured at O to the
tube M by one or more clamping-screws, which enable it to be fixed higher or
lower in order to regulate the quantity and weight of water to be contained in the
corresponding bucket Gibefore it will be raised thereby. The water is supplied.to
the buckets through pipes Piproceeding from a three-way cock R, which directs
the flow of water to the two buckets alternately, the cock R being operated
automatically from the shaft A through the lever arms and link S S S. In any
suitable part of the water-pipe there is inserted a regulating valve T.
Assuming the parts to be in the positions shown in the left-hand figure, the
opération of the apparatus is as follows:
!
The bucket G shown in the raised position is hold up by the pawl-like ends
of its corresponding levers K, which bear against a shoulder of its rod D, until
the water flowing into the bucket through the corresponding pipe P raises the
float N sufficiently to cause, by means of the links L; the pawl-like arms of the
levers K to open and allow the rod D to be carried down by the weight of
the bucket and the water contained therein: The descent of this bucket raises
the other bucket and simultaneously causes the partial rotation of the shaft A
and thus effects the automatic operation of the valve or other device requiring to:be

page_text: intermittently moved. The partial rotation of the shaft A also reverses by means of
the arms and link S, the position of the valve R, whereby the water is caused to flow
into the ascending instead of the descending bucket. The former bucket on reaching
its highest position, will become automatically locked in this position by reason of the
pawl-like ends of the corresponding pair of levers K engaging under the shoulder
of the corresponding rod D. Just before the descending bucket completes its
down-stroke, its valve H will come into contact with, and he stopped by, a rubber
pad U, whereby it is thus caused, during the completion of the descent of the
bucket, to open and allow the water in the bucket to escape into the tank 1. The
lower ends of the rods D pass through the bottom of the tank I into the bottom
guides which may consist of two short pieces of pipe having closed lower ends.
These pieces of pipe in addition to forming guides for rods D, serve at the same
time to prevent the escape of the released liquid through the bottom of the said
tank at the parts thereof through which the said rods work. The valve H is
closed by its own weight during the succeeding up-stroke of the bucket, which is
produced by the descent of the other bucket.
The cycle is the same for each of the buckets. The period of each complete
oscillation of the shaft A, and consequently that of the valve or the like connection
can be regulated by means of the cock T, and also by altering the position of the
floats relatively to the buckets so that they will be raised earlier or later as may
be desired. The periods between successive operations of the two buckets and
consequently the periods between the operation of the valve or the like connected
with the shaft A, can be arranged to be equal or unequal by adjusting the floats N
so that the quantities of water requisite for opening the pairs of levers K of the
two buckets shall be equal or unequal.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A hydraulic intermittent motor comprising a pair of vertically movable
buckets connected with a rock shaft or other rotary body and in connection with
each of which there are provided a liquid supply pipe with controlling valve and a
holding device controlled by a float and adapted to hold the bucket when moved
into its raised position, the arrangement being such that the buckets, are caused to
rise and fall alternately and impart an intermittent motion to the rock shaft or
other rotary body, either at equal or unequal periods, and to the valve by which
liquid is directed into cach bucket in turn, each bucket when raised becoming
automatically held in the raised position until released by its corresponding float,
and when lowered being relieved of the liquid previously supplied thereto, by the
opening of a valve therein, substantially as herein described.
2. A hydraulic intermittent motor of the kind herein referred to wherein each
vertically movable bucket is adapted to be held in its raised position, until again
sufficiently charged with water, by a hanging float mounted to slide on the rod by
which the bucket is carried and connected by links to a pair of levers the free ends
of which are adapted to automatically engage and hold the said rod and bucket
when sufficiently raised, substantially as herein described.
3. My improved hydraulic intermittent motor constructed arranged and operating
substantially as hereiubefore described with reference to and shown in the drawings
referred to.
.onl
11 1008
Dated thie 9th day of July 1906.
For the Applicant,
W. LLOYD WISE,
40 Lincoln's Inn Fields, London, W.C., Chartered Patent Agont.