IMPROVEMENTS IN THE CONSTRUCTION OF STRAW ELEVATORS
Year: 1876

page_text: LETTERS PATENT to Joln Dunnell Garrett, of Buckau, near Magdeburg,
Prussin, but at present residing at Delahay Street, in the City of Westminster,
Agricultural Implement Maker, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF STRAW ELEVATORS."
caled the 21st November 1876, and dated the 30th May 1876.
PROVISIONAL SPECIFICATION left by the said John Dunnell Garrett at the
Office of the Commissioners of Patents on the 30th May 1876.
JOHN DUNNELL GARRETT, of Buckau, near Magdeburg, Prussia, but at present
residing at Delahay Street, in the City of Westminster, Agricultural Implement
Maker. "IMPROVEMENTS IN THE CONSTRUCTION OF STRAW ELEVATORS."
The object of this Invention is to simplify the construction of straw elevators
and to permit of their being adjusted to any desired angle without disturbing the
driving mechanisın.
The horizontal frame which carries the elevating trough is attached by a centre
pin to the fore carriage, and it is supported at its hinder end by a pair of adjustable
travelling wheels. The frame is free to turn in either direction on the centre pin,
and to permit of this the hind wheels have each as their axles a swinging bar.
When these bars lic in a line transverse to the frame the hind wheels will, when
the clevator is being moved, follow the course of the wheels of the fore carriage.
When, however, the fore wheels are fixed, as will be the case when the elevator is in
use, the axles of the hind wheels are intended to be set in lines radiating from the
axis of the centre pin. The frame can then be turned in either direction to suit
the work in hand. Mounted loosely on the centre pin or spindle is a belt pulley,
which receives motion from horse or steam power, and carries on its upper side a
bevil wheel. In gear with this wheel is a bevil pinion carried by a transverse
shaft, and on the end of this shaft is a spur wheel which gears into a spur wheel
on a second transverse shaft that gives motion to the endless lifting chain or web.
The axis of this shaft is also the axis of motion of the elevator trough. This
trough is fitted with forked brackets to receive a transverse rod, which carries at its
extremities a pair of nuts for receiving a pair of elevating screwed rods. These
rods are fitted at their lower ends with a pair of worm wheels, and they are
supported in sockets hinged to the rear end of the horizontal frame. These worm
wheels are driven by worms mounted on a transverse shaft, having its bearings
on the hinged sockets, and by giving motion thereto the trough will be raised to
[Price Gd.]

page_text: any desired elevation through the action of the screwed rods upon the nuts which
support the trough. By reversing this motion the trough will be brought down to
its lowest position, at which time it will rest on supports standing up from the
rear of the horizontal frame. By continuing this lowering action of the screwed
rods the nuts will be drawn down clear of the trough, and the elevating screws
connected together by the transverse nut rod may then be dropped upon the
frame in a suitable position for travelling.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Dunnell Garrett in the Great Seal Patent Office on the 28th
November 1876.
JOHN DUNNELL GARRETT, of Buckau, near Magdeburg, Prussia, but at present
residing at Delahay Street, in the City of Westminster, Agricultural Implement
Maker. "IMPROVEMENTS IN THE CONSTRUCTION OF STRAW ELEVATORS."
The object of this Invention is to simplify the construction and working of straw
elevators and to permit of their being adjusted to any desired angle without
disturbing the driving mechanism.
In the accompanying Drawing Fig. 1 is a side elevation of the machine with its
elevator trough in the working position, Fig. 2 is a front elevation, and Fig. 3 a
back elevation of the same. Fig. 4 shows in plan view the horizontal frame or
carriage on which the elevator trough is mounted with the carrying wheels and
gearing connected thereto.
In these Figures A is the horizontal frame to which the elevator trough B is hinged.
This frame is supported on four wheels Cand C¹. D is the fore axle (shown detached
in several views at Fig. 5) as fitted with a ball joint by which it is connected with
the cast-iron fore carriage E to allow of it being turned in any direction. This forc
carriage E is made fast by bolts to the frame A, and thus the frame A is free to
turn upon the ball joint or centre coupling to the right or left. To provide for this
movement the hind wheels C¹ have each as their axles a swinging bar (see Fig. 4).
When these bars lie in a line transverse to the frame the hind wheels will, when
the elevator is being moved, follow the course of the wheels of the fore carriage.
When, however, the fore wheels are blocked, as will be the case when the elevator
is in use, the axles of the hind wheels are to be set in lines radiating from the axis
of the centre coupling. The frame can then be turned in either direction by the
means herein-after described to suit the work in band. The centre pin of the fore
carriage E is fitted with a band pulley F, which is driven by a Land from the
thrashing machine or from motive power mechanism, and by means of two bevil
wheels the pulley transmits motion to a transverse shaft H, at the end of which a
spur wheel I is fixed giving motion to another spur wheel K on a second transverse
shaft L. This shaft L forms the centre of motion for the elevator trough. On the
shaft L are fixed the chain wheels M which drive the endless chain or web for
lifting the straw in the trough. At the upper end of the elevator trough are two
other chain wheels M, also fixed on a transverse shaft, which latter to enable the
chain to be duly tightened rests in adjustable blocks N. On the under side of the
trough the chains pass over four guide rollers. On the back of the trough two
forked brackets O are fixed to receive the transverse rod P carrying at its ends a
pair of nuts Q supported by the elevating screw rods R. These rods are fitted at
their lower ends (see the enlarged detached views, Fig. 6,) with worm wheels S, and
turn in movable hinged sockets T attached to the horizontal frame A. Each worin
wheel is driven by a worm U mounted on the transverse shaft V, which has its
bearings in the hinged sockets in which the elevating screws rest. By turning this
shaft the trough can be raised or lowered to any desired height by means of the
screw rods and nuts. This turning of the shaft can be accomplished by means of
In order that this shaft V may be made self-acting, there is
the crank handle X.

page_text: attached to the transverse shaft La crank wheel Y, which transmits motion through
the connecting rod Z with the double pawle a to the pawle wheel b, which is fixed
on the shaft V, on which are the two worms above referred to. Accordingly as onc
or the other pawle gears into the spur wheel the elevator trough will be raised or
lowered on its fulcrum, and by adjusting tho stroke of the connecting rod this
notion will be rendered faster or slower. By reversing the motion the elevator
trough will be brought down to its lowest position, when it will rest on the support c
standing out from the horizontal frame A, as shewn by dots in Fig. 1. By continuing
this lowering action of the elevating screws the transverse rod P with the nuts leaves
its forked brackets attached to the under side of the trough, and both screws, as well
as the rod connecting them, may then be dropped upon the supports d attached to
the trough B, as also shewn in dots at Fig. 1, in which position they will remain
while the machine is being moved from place to place.
I will now describe the means by which I work round the frame in an angle of
one hundred and twenty degrees, more or less, without interrupting the working of
the elevator. On the shaft V is mounted loosely a reel e (sec Fig. 6), which is made
fast to the shaft by means of a sliding clutch f and lever g. Around the reel is
wound a rope which passes under two guide rollers & attached to the guide bars /
of the adjustable hind axles, both ends of the rope being secured by anchors at the
points. On the shaft V is a pawle wheel b, into which takes a double pawle
jointed to a connecting rod (see Fig. 4), the opposite end of which is connected to
a crank wheel keyed to the shaft L. Accordingly therefore as the one or the other
pawle is made to gear in the pawle wheel b the reel rotates backwards or forwards
winding on one or other end of the anchored rope and thus causing the elevator
frame to move to the right or left. On the under side of the elevator trough a sieve
is fixed through which any grain remaining in the straw would fall.
Having now set forth the nature of my Invention of "Improvements in the
Construction of Straw Elevators," and explained the manner of carrying the same
into effect, I wish it to be understood that under the above in part recited Letters
Patent I claim―
First. The arrangement above described whereby the clevator frame is enabled
to be traversed through an extended are without interrupting the action of the
elevator.
Secondly. The means above described for raising and lowering the elevator trough
automatically and for dropping the elevating screws when out of action.
In witness whereof, I, the said John Dunnell Garrett, havo hereunto set my
hand and scal, the 25th day of November, in the year of our Lord One thousand
eight hundred and seventy-six.
In the presence of
ARTHUR GEORGE MUMFORD.
JNO. D. GARRETT. (LS)