US763560A - Weighing-machine. - Google Patents

Description

N0. Z63,560- PATENTED JUNE 28, 1904. M. HOFMANN.

WEIGHING MACHINE.

- APPLIOATIOH FILED AUG. 28, 1903.

N0 MODEL.

n15 Norms PETERS 0o wwnaumu: msumsmn u UNITED STATES p Patented June 28, 1&4.

PATENT OFFICE.

WEIGHING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 763,560, dated June 28, 1904.

T0 on whom, it mm concern:

Be it known that I, MATHIAs HOFMANN, a citi- Zen of the United States, residingat Knightsville, in the county of Clay and State of Indiana, have invented a new and useful Veighing-Machine, of which the following is a specification.

This invention relates to weighing-machines of that character employing a scale-supported receptacle Within which there is arranged a partition or valve that constitutes a partial support for the material placed in the recep taele and is arranged to swing with relation to the feed-hopper when a determinate amount of material has been placed within the receptacle. r

The prime object of this invention is to provide a simple structure which will, be accurate without regard to the amount of material in the receptacle and wherein the weight of the material against thepartition will not be converted by the holding means forthe partition into a downward thrust upon the receptacle until said receptacle has moved from its initial position.

The preferred form of construction is illustrated in the accompanying drawings, where m Figure 1 is a side elevation of the improved weighing-machine. Fig. 2 is a vertical longitudinal sectional view through the same. Fig. 3 is a detail sectional view taken at right angles to Fig. 2, and Fig. 4 is a diagrammatic view showing the relation of the several pivots and the manner in which they coact.

Similar numerals of reference designate corresponding parts in all the figures of the drawings.

In the embodiment a supporting-frame is employed comprising a lower boxing 10 and an upper boxing 11, connected at their corners by suitable standards 12. Supported within the upper boxing is a hopper 13, the opposite walls of which converge, while a discharge-funnel let is suitably arranged at the lower portion of the supporting-frame preferably within the lower boxing.

Pivotally supported upon certain of the standards 12 is a scale-beam 15, having the usual arm upon which is slidably mounted a Serial No. 171,143. (No model.)

weight 16. The inner end of this beam is in the form of a stirrup 17, between and to which is hung a receptacle 18, said receptacle thus being disposed within the supportingframe with its open upper end beneath the hopper 13. The lower end of the receptacle is contracted by walls 19 and has adischargeopening 20, which is'located directly over the funnel 14. A guiding-link 21 is preferably employed, being attached at one end to the lower end of the receptacle and at the other end to one of the standards 12.

Pivoted intermediate its ends within the receptacle is a valve or partition 22, the pivot 23 of which is arranged centrally of said receptacle. The upper end of the partition projects above the receptacle and coacts with the oppositely-inclined walls of the hopper 13, the lower end being movable between the lower edges of the converging bottom walls 19 of the receptacle. Holding-links 24 are pivoted to the upper boxing 11, the pivot 25 being disposed in vertical alinement with the pivot 23 of the partition, and the vertical plane in which these pivots are located pass ing centrally through the hopper 13. The other ends of the links 24 are pivoted, as indicated at 26, to the upper end of the partition, and when said partition is in coacting relation with the walls of the hopper the links will be arranged horizontally, or, in other words, at right angles to a line intersecting the vertically-alined pivots. The manner of using this structure will be readily understood by those skilled in the art. The weight 16 having been adjusted to the amount desired, it will be evident that material passed through the hopper 13 will enter the closed compartment formed by the partition 22 until the weight of said material will depress the recep tacle. This will cause the partition to swing upon its pivot, thereby opening the compartment and permitting the discharge of the material into the funnel 1a. The lateral pressure against the partition will be sufficient to insure its swinging to the position shown in dotted lines, whereupon an oppositely-arranged eompartment will be formed, into which the material will now gravitate, and the operation above described will be repeated.

'It is especially desired to call attention to two features in this operation. In the first place the lateral pressure of the material against the partition will not be converted by the holding means 2 1 into a downward thrust upon the receptacle until said receptacle has moved from its initial position. This is due, as will be evident, especially by reference to Fig. 4, to the arrangement of the links in horizontal position, or, in other words, at right angles to a line intersecting the pivots 25 and 23. This is due to the fact that the pivots 25 and 26 are on a dead-center, and the pressure against the links will be in a direct line and not tend to throw said links downwardly. As soon as the downward movement of the receptacle begins, however, the pivots move out of this dead-line, and as a result the pressure of the material against the partition will be converted by the links into a downward thrust, accelerating the depression of the receptacle and effecting a rapid discharge. At the same time the momentum caused will insure the swinging of the partition to its opposite position. Thus no matter how much material is to be weighed the machine will be accurate, there being no variation in the downward thrust, yet at the same time after the full amount has been obtained rapidity of discharge is acquired. These are two important features in this structure.

From the foregoing it is thought that the construction, operation, and many advantages of the herein-described invention will be apparent to those skilled in the art without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A weighing-machine, including a scale, a verticallyanovable receptacle for the material to be weighed, a laterally-movable partition controlling the escape of the material from the receptacle, and a link for retaining the partition against lateral movement, said link being disposed to sustain the partition against the pressure of the material when the receptacle is in its elevated position without converting said pressure into a downward thrust upon the receptacle.

2. In a weighing-machine, the combination with a support, of a scale, a receptacle supported by the scale, a swinging partition located within the receptacle, and a link pivoted to the partition and to the support, said link, when the receptacle is elevated, being disposed in a horizontal position.

3. In a weighing-machine, the combination with a support, of a scale, a receptacle supported on the scale, a partition pivotally hung intermediate its ends within the receptacle, and a link pivoted at one end'to the support in substantially vertical alinement with the pivot of the partition, the other end of the link being pivotally attached to the partition so that when the. receptacle is elevated the link will be at substantially right angles to a line intersecting said vertically-alined pivots.

4:. In a weighing-machine, the combination with a support, of a hopper located at the upper end of the support, a scale mounted on the support, an open-ended receptacle supported on the scale and arranged below the hopper, a partition pivotally hung intermediate its ends within the receptacle, the upper end of the partition coacting with the opposite Walls of the hopper, and the .lower end being movable across the bottom of the receptacle, and links pivoted to the hopper and to the partition, said links, when the receptacle is elevated, being disposed. in substantially horizontal position.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in thepresence of two witnesses.

MATHIAS HOFMANN.

Witnesses:

J'. M. RAWLEY,

ELVA CLINGERMAN.

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