Improvements in Automatic Grain Weighing Machines.
Year: 1894

page_text: Date of Application, 22nd Feb., 1894
Complete Specification Left, 20th Nov., 1894-Accepted, 16th Feb., 1895
PROVISIONAL SPECIFICATION.
Improvements in Automatic Grain Weighing Machines.
I, JOHN HENRY ROBINSON, of Deptford Bridge Mills, Deptford, in the
County of Kent, Flour Miller, do hereby declare the nature of this invention to be
as follows:-
This invention relates to means of adjustably timing the successive discharges
of grain from automatic grain weighing machines, and of rendering the flow from
the delivery shoots of such machines uniform or nearly so.
The timing apparatus consists of a lever acted upon by a cam tooth of a wheel
which is caused to revolve at a uniform rate by any convenient motor, or it might
be by clockwork.
In order that the timing may be varied, several of the wheels with various
numbers of cam teeth are fixed side by side on one spindle, and the lever is fitted
on a rocking shaft parallel to the spindle along which shaft it can be slid and set
by a screw in position to be acted on by any one of the wheels.
To attach this apparatus to the weighing machine I provide that the tipping
receptacle, discharging valve or feed valve, or equivalent portion of the weighing
machine shall be caught by a detent latch, holding the receptacle or valve stationary
until the detent is released.
The release of the detent is effected by the lever in connection with the timing
apparatus as above mentioned.
In order to render the flow of the grain uniform or nearly so, the following
arrangement is adopted.
The weighing machine discharges into a hopper having lateral apertures
provided with adjusted valves at several different levels. The lowest valve.is so
adjusted that during the interval between one delivery from the weighing machine
and the next, it cannot discharge the whole of the quantity delivered; the quantity
in the hopper consequently accumulates until it reaches the next valve in height,
by which a farther discharge takes place, but still not quite enough to discharge
all that is delivered from the weighing machine.
The farther accumulation is discharged by the third aperture in height which
may be simply an overflow without a valve. By adjusting the lowest valve so as
to discharge a large proportion, such as 90 per cent. of the delivery from the
weighing machine, and the second valve to discharge a large proportion of the
balance such as 8 per cent. of the whole, the flow of grain in the shoot receiving
the discharges from the hopper is rendered nearly uniform.
Dated this 22nd day of February 1894.
ABEL & IMRAY,
Agents for the Applicant.

page_text: DIVINICATION.
Improvements in Automatic Grain Weighing Machines,
I, JOHN HENRY ROBINSON, of Deptford Bridge Mills, Deptford, in the
County of Kent, Flour Miller, 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 means of adjustably timing the successive discharges of
grain from automatic grain weighing machines.
Fig. 1 of the accompanying drawings is a side view, Fig. 2 an end view and
Fig. 3 is a plan of timing apparatus according to my invention.
A is a lever acted upon by a cam tooth of a wheel B which is caused to revolve
at a uniform rate by any convenient motor, such for example as clock work working
a worm C gearing with a worm wheel D on the axis of the wheel B.
In order that the timing may be varied, several of the wheels B with various
numbers of cam teeth are fixed side by side on one spindle, and the lever A is fitted
on a rocking shaft E parallel to the spindle, along which shaft it can be slid and
fixed in position to be acted on by any one of the wheels B.
To connect this apparatus to the weighing machine I provide that the tipping
receptacle, discharging valve or feed valve, or equivalent portion of the weighing
machine, shall be caught by a detent latch, holding the receptacle or valve
stationary and thus preventing the machine from weighing until this détent is
released. On the rocking shaft E I fix a lever F and from it a rod or other
connection G extends up to the detent of the weighing machine. So long as the
lever A is kept in a raised position by a tooth of the wheel B revolving in the
direction of the arrow, the weighing machine is kept out of action by the detent
latch, but when the lever A escapes the tooth, the lever F and rod G descend
withdrawing the detent, and thereupon the weighing machine resumes its action,
until another tooth of the wheel B again raises the lever A, allowing the detent
latch to engage and thereby stop the weighing.
The lever F is made with a slotted hole in order to vary the stroke of the rod G
as may be required.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Timing apparatus for automatic grain weighing machines, substantially as
described with reference to the drawings.
Dated this 21st day of November 1894.