Improvements in Apparatus for Automatically Weighing Grain or Granular Substances.
Year: 1892

page_text: Date of Application, 15th Sept., 1892-Accepted, 31st Dec., 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by MÜHLENBAUANSTALT UND MASCHINENFABRIK
VORM. GEBRÜDER SECK, of Dresden, in the Empire of Germany.]
Improvements in Apparatus for Automatically Weighing Grain or
Granular Substances.
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co., Patent
Agents, 45 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 :-
The balance apparatus for automatically weighing grain, constituting the subject
of this invention and illustrated in the accompanying drawings, Figures 1 to 6,
comprises the beam A with the suspension devices B and C for the grain scale and
weights. The arms of the beam are of equal length, and the knife edges a a' and a²
are situated in a straight line. Above the grain scale is arranged the fixed
hopper D, the outlet orifice of which can be closed by two concentric turning
slides E and F. The slide E is provided with two slots e e designed to admit the
grain in two thin streams towards the end of the filling period, for the purpose of
obtaining a more accurate result whilst the slide F effects the complete closing,
The grain
advancing below the brush G which forms a tight joint with the same.
scale is made of a receptacle H of sheet-metal the bottom of which is formed by a
flap I adapted to turn upon the point i, and the suspension device C consists of a
casting of a suitable shape for the reception of the weights. From one arm of the
suspension device C is loosely suspended the hollow auxiliary weight which serves
for preventing the balance from tilting over on the termination of the provisional
filling.
The slide F carries an arm f to the end of which is pivoted a rod L which
during the filling period keeps open the slide F by bearing against the roller M.
This roller M is supported in a holder N secured to the standard O.
The slide E carries an arm P which when the bottom flap I is closed and while
the provisional filling takes place, keeps the said slide open, its nose p being held
by the stop 9 which is fixed to the arm Q of the bottom flap I, until the descending
grain scale causes the disengagement, whereby the slide is automatically closed and
terminates the provisional filling.
To an arm d rigidly connected with the hopper D is pivoted a lever R provided
at r with a pin and carrying at a suspension rod S.
When the slide F is open
the lever R rests with its pin r in the bend f¹ of the arm f on this slide until the
latter is closed by the downward movement of the grain scale. On the suspension
device C is fixed for this purpose a pin c which by acting upon the bell-crank
lever m m forces the rod L from its position of rest, whereby the slide
free and is automatically closed by virtue of its own weight.
becomes
To the grain receptacle H is pivoted a lever T T' whose arm T' has a nose with
which engages a pin on the bottom flap I during the filling period so as to keep
the flap closed. After the closing of the slide F the lever R becomes free and
bears with its notch 2 upon a pin c provided on the suspension device C for the
weight and thus exerts a pressure upon the said pin, thereby forcing back the
balance approximately to the position which it occupies at the commencement of
the filling. Immediately afterwards the rod S exerts upon the lever arm Ta
pressure which effects the disengagement of the bottom flap I and consequently the
emptying of the grain scale. After this discharge the bottom flap is automatically
closed by the counterweight at its extremity.
With the object of compensating for small inaccuracies in the weighing a

page_text: No text detected.

page_text: to force the weight scale down and thus lift the grain scale again to its original
position suitable for a fresh filling.
2. In apparatus for automatically weighing grain the arrangement of a
suspension rod S on the lever R, whose end T¹ forms a stop for holding the nose,¹
of the bottom flap I of the grain scale and in the downward movement of the
lever T under the pressure of the rod S releases the pin i' and therefore the flap I,
so that the latter will be opened by the weight of the grain resting upon it and will
allow the grain to fall from the scale.
3. In apparatus for automatically weighing grain the device for stopping the
movement of the balance during the filling period after the closing of the first
slide E, comprising an auxiliary weight K suspended with play by means of a
hook in an eye on the suspension device C, the play being obtained by the
weight K bearing in the initial position of the balance upon a rod V, but annulled
as the downward movement of the grain scale begins, in order to interrupt this
movement again after it has served for closing the admission slide E.
4. In apparatus for automatically weighing grain the device for re-opening
the two slides EF and raising the lever R again, consisting in that the bottom
flap I, which is automatically closed after the emptying of the grain scale, will by
means of the stop y, force back the nose p of the arm P on the slide E and open
the latter, which by its catch a simultaneously pushes open the slide F and thereby
brings also the rod L back to its original position, so that the lever R will remain
again in a raised position upon the arm of the slide F.
Dated this 15th day of September 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.