Improvements in Elevators for Grain and like Substances.
Year: 1889

page_text: Date of Application, 20th Mar., 1889
2000
Complete Specification Left, 20th Dec., 1889-Accepted, 1st Feb., 1800
Complete opecification Lery, 20th Dec., 1009-Accepted,
PROVISIONAL SPECIFICATION.
Improvements in Elevators for Grain and like Substances.
I WILLIAM GREEN HERBERT of Imperial Chambers Dale Street Liverpool in the
County of Lancaster Dealer in Works of Art, do hereby declare the nature of this
invention to be as follows :-
The invention relates to improvements in elevators for which I obtained British
Letters Patent No. 16230 of the year 1886.
The main objects are to provide means for regulating the lenthening and shortening
of the elevator so as to ensure that the buckets shall enter the required distance into
the grain or substance to be elevated to protect the lower end of the elevator from
becoming choked with the said grain or substance and to provide facilities for
driving.
The invention consists essentially first in connecting the rising and falling pulleys
and movable cage by means of endless chains or other devices actuated by worm
or suitable gear so that the said pulleys and cage are caused to move to and from
each other at equal speeds.
Second. In providing a movable casing for enclosing the lower part of the elevator
for some distance above the cage.
Third. In providing elevators as herein set forth with a counter shaft and sliding
and fixed pulleys whereby motion is communicated by chain or like gear from a
winch or other imotor to the main shaft of the elevator.
Date this 10th dose of March 1980
Per pro J. T. KING,
J. Johnson,
Agent
COMPLETE SPECIFICATION.
Improvements in Elevators for Grain and like Substances.
I WILLIAM GREEN HERBERT of Imperial Chambers, Dale Street, Liverpool, in the
County of Lancaster, Dealer in Works of Art, 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 :-
The invention relates to improvements in elevators for which I obtained British
Letters Patent No. 16230 of the year 1886.
The main objects are to provide means for regulating the lengthening and
shortening of the elevator so as to ensure that the buckets shall enter the required
distance into the grain or substance to be clevated and protect the lower end of the
elevator from becoming choked with the said grain or substance.
The invention consists essentially, first, in connecting the rising and falling pulleys
and movable cage by means of endless chains or other devices actuated by worm or
suitable gear so that the said pulleys and cage are caused to move to and from
each other at equal speeds.
Second. In providing a movable casing for enclosing the lower part of the elevator
for some distance above the case.

page_text: c care the main driving shaft and chain wheels, d are plates secured to the
pulleys or to a prismatic piece on the shaft c, e are retracting pulleys on
a shaft for carrying the buckets past the end of the shoot b. fare pulleys on
a shaft g around which the chain's are reflexed. The bearings of the shaft g are
carried in guides h on the trunk a. ij and are guide pulleys, is the cage,
m shaft and pulleys round which the lowest portion of the chains pass.
n guide rods
attached to the cage and passing freely through guide tubes o secured to the trunk a.
pare endless chains, 7 are the buckets attached thereto. The chains and pulleys are
in duplicate one at each side of the machine, and the buckets are between and
secured to the chains in the usual manner. The action of the elevator is as usual
with the exception that as the shaft g is raised or lowered in the guides ½ the cage
falls or is raised.
เ
In order to secure synchronous inotion of the cage and the shaft chains are
attached to the bearings of the shaft and pass over chain wheels and
pulleys near the bottom and top of the trunk the pulleys and chain's are in
duplicate one set at each side of the machine. The pulleys are on a shaft' t to
which is secured a worm wheel u by means of a friction clutch u¹ of any usual
construction, v is a worm and handle for giving motion to the worm wheel u. The
pulleys & are suspended from hangers t' by a tension screw and nut t'. They may be
rigidly attached to the trunk if desired. wo are chains also attached to the bearings of
the shaft g and passing over pulleys a near the top and bottom of the machine, one
set on each side.' The said chains w are also attached to crossheads y by means of
cottars y', the crossheads y being themselves secured to the guide rods n by nuts'.
The guide rods n are in lengths equal to the travel of the pulley shaft g and have male
screw-couplings at one end and female screw couplings at the other.
The elevation of grain or other substance is offected by giving motion' to the
.chains and buckets in the usual way. As the substance is discharged the handle vis
turned and the wheel u which is held securely to the shaft is thereby caused to
rotate and with it the chain wheels t, these chain wheels & cause the chains, to raise the
shaft the motion of the shaft g actuates the chains w which cause the cross-
heads y to descend and lower the cage 7; if the action is reversed the cage 7 is raised
and the shaft glowered; in this way an equal strain is always maintained on the
chains p. When the elevator is supported on a staging separate from the ship or
floating structure to be discharged the cage is lowered the required distanco into
the grain or substance to be elevated, the friction clutch is released so that the
raising and lowering gear can move independently of the wheel u and handle v.
In this way as the vessel rises or falls the cage will rise or fall with it and lower or
raise the shaft 9.so that although the trunk is stationary and the vessel in motion
the olevator will continue to act efficiently. When the elevator is on the vessel or
structure being discharged it is not necessary to disconnect the worm wheel from
its shaft.
Around the lower part of the elevator is a casing 1 formed of four rigid pieces
connected by hasps 2 so as to prevent too rapid feeding of the buckets and protect the
assistants from being hurt by the moving parts.
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 :-
"
First. In endless chain and bucket élévators the combination of the pulleys f
shaft g, guides, bearings s, chains r wheels t, pulleys, shaft t", "chains to, cross-
head y, rods n, cage and connections substantially as setforth.
l
Second. In endless chain and bucket elevators 'the' combination with the raising and
lowering gear of reflexing pulleys f, and a friction clutch-u².
Third. In endless chain and bucket elevators having reflexing pulleys, and raising
and lowering gear, the guide plates, d, rotating with the main driving shaft.

page_text: Fourth. In endless chain and bucket elevators the combination with the lower part
of the elevator of a protecting casing substantially as sotforth.
Dated this 19th day of December 1889.
A
J. T. KING,
Per J. Johnson,
Agent.