IMPROVEMENTS IN ELEVATORS FOR GRAIN AND OTHER SUBSTANCES
Year: 1884

page_text: I, WILLIAM GREEN HERBERT, of Brown's Building's Liverpool, in the county
of Lancaster, Dealer in Works of Art do hereby declare the nature of my said
invention for IMPROVEMENTS IN ELEVATORS FOR GRAIN AND OTHER SUBSTANCES
to be as follows:-
The invention relates to apparatus in which a series of buckets carried by
endless chains or their equivalents is used for raising grain, salt, small coal and
like substances more especially from the holds of ships or from places where the
substances have to be raised to a uniform height from varying depths. The object
is to so construct such apparatus that it shall be comparatively light, freely
movable from place to place, readily securable in position, easily driven and
efficient in action.
Elevators under my invention are constructed with a telescopic frame carrying
a wheel or wheels at each end around which the endless chain of buckets passes
in combination with means such as is hereinafter described for retarding the
travel of or collecting and stowing the buckets when returning or descending
empty until required to be brought into action.
The said means for retarding the travel of or collecting and stowing the
buckets consists either of screw helical, wheel or suitable guides caused to rotate
by gearing.
Guides are used to direct the buckets in their travel from one end of the frame
to the other and it is preferred that the said buckets should move enclosed in
trunks or ways.
The
The action of the apparatus is as follows:-The frame is secured in the desired
position with the delivery end at the required height and with an endless band
of sufficient length to allow of the buckets reaching to the bottom of the space to
be discharged. Motion is given to the top pulley or pulleys by means of any
suitable motive power and the endless chain of buckets is caused to travel.
buckets are collected and caused to travel close together by the apparatus above
mentioned during their descent unless the apparatus is fully extended. The lower
end of the apparatus dips into the grain or substance to be elevated and gradually
falls or is lowered as the quantity decreases. The slack in the chain, band or
equivalent owing to the slower or retarded travel of the buckets on their descent
allowing of the lengthening of the apparatus until the chain is fully stretched.
To save expenditure of energy uselessly the chain or equivalent is made of just
sufficient length for the work to be done, links and buckets being attached or
detached when necessary.
Dated this third J
1004

page_text: I WILLIAM GREEN HERBERT of Browns Buildings Liverpool in the County
of Lancaster Dealer in Works of Art do hereby declare the nature of my
invention for IMPROVEMENTS IN ELEVATORS FOR GRAIN AND OTHER SUBSTANCES,
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The invention relates to apparatus in which a series of buckets carried by
endless chains or their equivalents is used for raising grain, salt, small coal and
like substances more especially from the holds of ships or from places where the
substances have to be raised to a uniform height from varying depths. The object
is to so construct such apparatus that it shall be comparatively light, freely
movable from place to place, readily sccurable in position, easily driven and
efficient in action.
Elevators under my invention are constructed with a telescopic frame carrying
a wheel or wheels at each end around which the endless chain of buckets passes
in combination with means such as is hereafter described for retarding the travel
of or collecting and stowing the buckets when returning or descending empty
until again required to be brought into action.
The said means for retarding the travel and for collecting and stowing the
buckets consists of screw helical wheel or suitable guides caused to rotate or
equivalent devices such as escapement, trip or catch gear having intermittent.
motion imparted thereto or any like or suitable device for checking the motion of
the bucketr at any available point on their downward or return travel and
allowing them to pass such point only at the speed required to keep the chains
bands or their equivalents sufficiently stretched during their upward travel.
Guides are used to direct the buckets in their travel and these may be arranged
to act on the fronts backs sides or other portions of the buckets in any ordinary
well known or suitable way and may consist of grooves projections or other devices
as found most advantageous.
The sheet of drawings hereunto appended contains four sectional views of
elevators constructed in accordance with my invention the essential features of each
being the construction to allow of the lengthening and shortening of the elevator
and the collection and stowing of the buckets to greater or less extent according
to the length of the elevator on their return travel when empty. In all the views
the same letters denote like parts.
1 trunk of upper part of elevator. 2 driving wheel and shaft carried in
bearings in a. 3 chain wheels on shaft 2. 4 endless chains passing around
wheels 3 and also around the wheels 5 on a shaft carried in bearings in the frame G
of the lower part of elevator. 7 buckets secured to the chains 4 by pins or rivets,
and so shaped as to fit one into another. The frame 6 is connected to the trunk 1
by rods 8 free to slide in guides 9. It may also be formed as a trunk arranged to
slide in or over a and lazy tongs or like devices may be used as at 10 fig 1 to
connect the upper and lower frames. The frame 6 is weighted when necessary
to ensure its free descent as the grain or other substance is elevated.
In fig 1 a helix 11 driven by bevel gear from the shaft 5 is arranged to catch
the edges of the buckets 7 and deliver them to the wheel 5 at a speed corresponding
to that of the circumferential motion of the said wheel. In figз 2. 3 and 4 and
where the buckets are collected in the upper part of the frame the retarding
apparatus must be so arranged as to allow of the buckets being delivered at

page_text: double the rate of the circumferential speed of the wheel 5 when the frame is
being extended.
In fig 2 a wheel 12 is substituted for the helix 11 and is driven by an endless
band from the wheel 2 adjusted so as to allow of the wheel 12 slipping round at a
greater speed than it is driven when the frame is being extended.
In fig 3 an escapement or double rocking lever 13 takes the place of the
wheel 12 and when the frame is to be extended increased motion is given to the
escapement by hand or other suitable means.
In fig 4 two spring catch plates 15 supply the place of the escapement. In this
arrangement the direct pull on the buckets by the rotation of the wheel 5 controls
their delivery.
The action of the apparatus is as follows:-The upper frame 1 is secured in the
desired position over or in the hatchway by stays or carriers in any convenient
manner with the delivery shoot at the desired height above the deck. A driving
band froin any suitable motor is passed around the wheel 2 and the frame 6 is
lowered until the buckets when passing around the wheels will dip into the
grain or cargo being elevated. Motion is then given to the driving band and
wheel 2 and the endless chain or band of buckets is caused to travel during their
upward travel the buckets are their full distance apart but during the downward
travel they are collected one on the other in a pile as shown in the drawings and
delivered from the bottom of the pile as required by the wheel 5. As the lower
frame 6 descends owing to the decreased height of the grain or cargo being
discharged the pile of buckets is diminished in height until the chain is fully
stretched.
:
To save expenditure of energy it is desirable that the chain or equivalent is
made of just sufficient length for the work to be done in each individual case; for
this purpose links and buckets are attached or detached as required.
Amongst other advantages of elevators constructed under my invention are
lightness, portability, adaptability, most advantageous utilization of the power
expended, simplicity of working and reduction of strain on the working parts.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
-
First. Endless band and bucket elevators constructed with a telescopic frame
and provided with means for checking retarding and controlling the motion of the
buckets on their return travel substantially as herein set forth.
Second In telescopic band and bucket elevators checking regulating retarding
or controlling the motion of the buckets on their return travel for the purpose
herein set forth.
Third In telescopic band and bucket elevators collecting and delivering buckets
on the return or downward travel for the purpose set forth.
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