Improvements in Endless Chain and Bucket Elevators.
Year: 1897

page_text: Improvements in Endless Chain and Bucket Elevators.
I, BOYE CHRISTOPHER THOMAS EDWARD BOYESEN, of 133, Westbourne Terrace,
London, W., Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an endless chain and bucket elevator designed more
especially to be used in connection with the barge or lighter for which former
Letters Patent No. 16,934 of 1894 were granted to me.
The object of my present invention is, first, to give to an elevator of given
dimensions a capacity larger than that of one of ordinary type of the same general
dimensions and secondly to provide improved means for supporting the upper or
loaded side of the chain of buckets.
According to my invention the endless chain is formed by plates hinged together,
cach plate being of the full width of the elevator and of a length equal to the
distance from bucket to bucket, the bucket itself being formed by an angle plate
fixed transversely to the chain plate at, or just above, the lower hinge of said
plate so that its flange, which constitutes the lip of the bucket, projects outwardly
and preferably upwardly when rising, the endless chain of buckets thus constituted
being stretched upon a pair of triangular drums or barrels fixed upon gudgeons
mounted to rotate one at each end of the elevator frame.
The ascending or loaded side of the endless chain, instead of being supported
on a series of anti-friction wheels or rollers of comparatively small diameter
closely juxtaposed as heretofore, is carried by an endless band or bands passing
around two or more pulleys or rollers which are so mounted in the elevator frame
as to be capable of fully distending the endless band or bands and supporting the
bucket chain without sagging.
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спатаци бисket Elevators.
I, BOYE CHRISTOPILER THOMAS EDWARD BOYESEN, of 133, Westbourne Terrace,
London, W., and 6, Crosby Square, London, E.C., Gentleman, do hereby declaro
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 relates to an endless chain plate and bucket clevator designed
[Price 8d.1

page_text: more especially to be used for discharging cargoes of coal and other material in
bulk from barges or lighters and particularly the barge or lighter for which
former Letters Patent No. 16,934 of 1894 were granted to me.
The object of my present invention is, first, to increase the charging capacity
and, secondly, to provide improved means for supporting the upper or loaded sido
of the chain of buckets.
The invention is illustrated in the accompanying drawings forming part of this
Specification wherein I have represented in Figure 1 an elevation of the apparatus,
the casing of the elevator leg being partly in section, Figure 2 shews a detail.
The elevator is formed of an endless chain of plates A and buckets B the plates
which are hinged together at a being of a width to work between the sides of the
casing C of the elevator leg. The plates A are of greater length than usual and
each is in one with a bucket B formed by the lower part of the plate being bent
up to form a flange making an angle of about 45° with the plane of the plate,
this flange B, which forms the lip of the bucket, standing about vertical when the
elevator leg is at its normal inclination as shewn. The knuckles of the hinge
joint are preferably formed by the bend of the plate and similarly for the upper
edge of the plate, as shewn in Figure 2, but the hinges may be otherwise constructed.
The endless chain of plates A and buckets B is supported upon a pair of drums 1)
carried by shafts mounted to rotate in bearings at the upper and lower ends of
the frame C of the leg, the chain of plates and buckets being driven by endless
chain gearing in connection with the shaft of the upper drum, and with an inter-
mediate chain wheel E at the side of the casing C, this wheel turning as one with
another on which runs another endless chain F driven from the engine, the chain F
being kept taut in various positions of the elevator leg by a weighted jockey
pulley G. The chains H I by which the elevator leg is slung, are in pairs attached
to the opposite sides of the casing C so as to prevent any tendency of the driving
gear to cant the elevator leg sideways.
The framing C in which the chain of plates and buckets works, is provided at
the lower end with a concave trough J within which the lips of the buckets 13
acts as scoops in rotating about the lower drum. The upper lip of this trough
is situated below the edge of the inclined floor K of the barge to be discharged so
that the coal will flow into the spaces between the drum D and trough J whence
it is scooped up by the buckets B.
In order to increase the loading capacity of the buckets, the drums D are made
of triangular section so as to have the minimum number of sides and consequently
sides of the maximum length to which the length of the plates A correspond.
Hence as these sides form chords to the arc of the curvature of the trough J the
greater their length the greater will be the space between the plates and the
trough to be filled with coal and consequently the greater will be the charging
capacity, of the buckets.
Instead of the ascending loaded side of the endless chain of plates being sup-
ported on anti-friction rollers at intervals as heretofore, it is supported by pairs
of endless chains L', L3, L³, L', running on idle pulleys carried by cross shafts 1, 18,
13, 14, 1 mounted on the sides of the framing C the two chains of each pair being
adjacent to the sides of the framing C and the pulleys carried by the shafts 1³, 13, 1
being double so as to permit the overlapping of the successive pairs of chains so
as to avoid break of continuity of the support afforded by the successive pairs of
chains which are free to run with the loaded chain of plates A resting on them
The shafts 1, 13, 1, 1, 1³, are adjustably mounted so as to admit of the chains L', L³,
L³, L, being maintained in sufficient tension to support the chain of buckets
without excessive sagging.
The two drums D are geared together by the chain of plates and are so mounted
relatively to each other that the one is 600 in advance of the other in the direction
of rotation so as to minimise the rising and falling motion of the loaded side of
the bucket chain, consequent on the alternate flat sides and salient angles of the
drums.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
--
1. The herein described improvements in endless bucket chain elevators con-
sisting in the combination with a chain of plate buckets, of a drum of triangular
section, and a charging trough of circular segmental section in which the buckets
act as scoops to take up their load so as to obtain increased charging capacity sub-
stantially as specified.
2. In an elevator the combination with an endless chain of plate buckets, of
endless supporting chains for the loaded buckets, the said supporting chains
running free and being arranged and applied substantially as specified.
3. The herein described improved plate bucket elevator comprising the endless
chain of plate buckets, drums of triangular section on which the chain of plate
buckets runs, a circular segmental charging trough in which the buckets act as
scoops, and sets of endless supporting chains for the loaded buckets, all substan-
tially as specified.
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A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.