Improvements in Excavators and Elevators.
Year: 1890

page_text: Date of Application, 11th Feb., 1890-Accepted, 5th July, 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by MARY FRANCES SMITH, of Albany, New York,
United States of America, Lady.]
Improvements in Excavators and Elevators.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake and Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 relates to improvements in excavating elevators, and consists of the
novel construction and combination of parts hereinafter described and pointed out in
the claims.
Similar letters refer to similar parts in the drawings, in which ;
Figure 1 is a view in side elevation of my improved elevator.
Figure 2 is a view in front elevation of the same parts with, a portion of the
bucket-chain broken away, and showing the device mounted upon a turn-table.
Figure 3 is a sectional view taken on the broken line xx in Figures 1 and 2.
i
Figure 4 is a sectional view of the arm A8 taken on the broken line y, y in
Figure 1.
Figure 5 is a sectional view of the main mast and slide-block taken on the broken
linez, z Figure 1.
The last three figures are made upon an enlarged scale.
In Figure 2 the scale is somewhat exaggerated for convenience in illustration, the
lateral dimensions being nearly doubled.
Though my improved elevator is adapted to lift grain, coal and other articles from a
lower to a higher plane, it is especially applicable for dredging or excavating soil, and
also elevating it to a distributing point on a higher plane.
The device may be erected from a dock, or boat, when the excavation is to be made
beneath a body of water.
The supporting mast A is erected from the turn-table A¹ and provided with braces A*
and A³.
The turn-table may be mounted upon a series of balls A adapted to roll in the
annular grooves A and A6 in the table and supporting base A' respectively.
The mast is provided with, and supports, a laterally projecting arm A8 stayed by.
brace Aº.
The arm supports at its lower end an elevator leg B and at its upper end the shaft
which drives and partly supports the endless bucket-chain C.
The leg is connected with the arm by the fork A10 the lower bifurcate ends A¹ of
the fork being pivoted to the arm, one end on one side and the other on the other side
of the arm.
!
The fork is also provided with the upper smaller bifurcated ends A¹³ which support
a shaft B upon which shaft are fixed the sprocket-wheel B² at the middle part, and
the pinions B³ one at each end.
This shaft. also serves to pivot the upper ends of the fork to the bifurcated arms B*
of another fork having a stem B³.
This stem is provided with a toothed rack B2 adapted to engage with and be
supported by the pinion B fixed upon shaft B'.
:
This shaft is also provided with a fixed pulley B8 and has its bearings in the upper.
end of the mast.
The pulley B is connected by a belt or cord B with the crank wheel B10 fixed upon
a shaft, which has its bearings in the lower end of brace A³.
The rack is held in engagement with the pinion by the rod B".

page_text: The fork arms B serve to support a shaft B13 upon which is fixed-the small
sprocket wheel B connected by chain B with the wheel B².
Fixed upon the same shaft B13 is a larger pulley or sprocket wheel B¹ provided
with an operating endless belt or chain B¹
The pinions B3 are adapted to travel along a plate gear B18 secured to two of the
bars B forming the leg.
The other two bars B20 serve to hold the pinions in engagement with their plate
gears.
The leg is made up of the four bars or strips B12, and B20 and is provided at its lower end
with a loose pulley B2 adapted to support and guide the bucket chain. This chain
passes up, over guide pulley (supported upon the lower ends of arm A8 up along
the arm over the driving pulley mounted upon the driving shaft C3, where the
buckets are inverted, passing down over guide pulley (down around the vertically-
adjustable guide pulley C movably secured to the main mast, up along the mast to
the guide pulley C, over the same, down the arm A8 over guide C to the place of
beginning, at the guide pulley, in the leg.
The driving shaft C³ may be driven in any well known manner.
I have shown a pulley fixed thereon with a driving belt broken away.
The sides of the frame or block which supports the pulley (5 is provided on its
sides with the guides C adapted to slide in corresponding vertical grooves A" in the
main mast.
A friction block or pulley CP is secured to the table, and a rope or chain (10 passed
under the same, one end of the rope being secured to the slide-block and the other
end leading to a capstan C2 or equivalent device for communicating a downward slide
movement to the slide block which supports pulley (5.
The operation of the machine is as follows: power is applied to rotate the driving
shaft Cthereby imparting motion to the chain and buckets, which may be constructed
and arranged in any well known manner, the chain (10 slackened to permit of an
upward movement of the slide block, and rotary movement communicated to the
pinions B' by means of rope B" and connecting chain and sprocket wheels, in a
direction to force the leg B downward, by reason of the action of the pinions upon the
racks with which they engage.
The leg is thus forced downward until the buckets secured to the chain come in
contact with the soil, to be excavated or other substance to be elevated.
The excavated material is carried by the buckets up over the pulley C³ where it
falls, as the buckets are inverted, into a chute (13 as indicated in figure 1.
The chute may be of any well known form and lead to such place as may be desired,
to deposit the material as excavated.
It is manifest that the position of the leg may be varied vertically as desired by
means of the pinions B' and operating mechanism.
The lower end of the leg can also be easily moved toward or from, the mast, by
means of the rack B26 and pinion B operated by the crank-wheel B¹º.
The shaft B24 of the pulley C¹ projects sufficiently at each end to form a pivot
guide or fulcrum for the leg, the channel B23 forming a slide-way for the pivot when
vertical movements are communicated to the leg.
If the rack is forced outward from the mast by the pinion Be the lower end of the
leg will be forced inward oscillating upon the pivot formed by. the shaft B24.
Lateral movements in either direction may be communicated to the leg by imparting
a rotary movement to the supporting table.
Such rotary movement may be communicated by hand or in any well known
manner.
When the leg is given an upward movement, by means of the pinions B' the slack
in the bucket chain is taken up by drawing the slide block C down toward the table
by means of the chain C as before explained.
1
As shown in the drawings the slide-block is at its lowest limit of slide-
movement.

page_text: Its upward limit is the level of the guide pulley C. It is apparent that the leg
can be given a vertical movement equal to the slide movement of the slide-block.
The pinions B' are held in engagement with their plate-gear on the leg, by the
flanges a which fill the channel B23 and prevent the pinions from slipping their cogs or
sliding longitudinally off their racks.
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 communicated
to me by my foreign correspondent I declare that what I claim is :-
--
First In an excavating elevator having an endless bucket-chain and chain guiding
pulleys, the combination with a rotary mast provided with a laterally projecting leg-
supporting arm and a vertical slide-way for a slide-block, of an elevator-leg secured
to such arm, and adjustable vertically and a chain-guiding pulley having a block
vertically adjustable along the slide-way in the mast provided with means for
communicating slide movements to such slide-block, substantially as described.
Second-In an excavating elevator having an endless bucket-chain, the combination
with a mast provided with a laterally projecting arm of a pinion rotary in bearings
supported by such arm and means for imparting a rotary movement to such pinion
an elevator-leg provided with a longitudinal pivot receiving channel; a pinion
engaging rack, fixed upon the leg and a chain-guiding pulley located at the lower end
of the leg, a pivot guide fixed upon the mast arm and having a slideway in the
channel in the leg and means for oscillating the leg upon such pivot-guide substantially
as described.
Dalth: 11th
Ր n
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.