US1497392A - Automatic weighing device - Google Patents

Description

June 10,

4. B. VAN DEREN AUTOMATIC WEIGHING DEVICE Filed Jan. 9, 1922 Patented June 10, 1924.

JAMES B, VAN DEREN, OF HENNEEiSEY, OKLAHOMA.

AUTOMATIC WEIGHING DEVICE.

Application filed January 9, 1922. Serial No. 527,945.

To all whom it may concern:

Be it known that 1, JAMES B. VAN DEREN,

a citizen of the United States, residing at Hennessey, in the county of Kingfisher and State of Oklahoma, have invented a certain new and useful Improvement in Automatic lVeighing Devices, of which the following is a complete specification.

This invention relates to automatic weighing devices and is designed more especially as an improvement over the invention of my copending application, filed February 3. 1921, Serial No. 442,102, and has for its object to produce a simple and effective means for insuring accurate weighing, by giving increasing leverage to the opening door to insure the full closing movement of the other door and to maintain said door positively closed until the scale has had time to re-elevate the container and a latch mechanism has locked the doors in position; and to also insure the proper operation of the deflector or cut-off used in directing the course of the grain from one compartment to the other of the container. This invention is especially adapted for use in large size automatic scales, such as those employed in flour mills and grain elevators, although it is also suitable for use in the smaller sizes.

Vith the object named in view the invention consists in certain novel and useful features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood reference is to'be had to the accompanying drawing, in which Figure 1 is a side elevation of the container and door operating mechanism in 40 normal position.

Figure 2 is a side elevation taken at right angles to Figure 1.

Figure 3 is a view similar to Figure 1, but illustrates both doors inhalf opened position.

Figure l is a view similar to Figure 1, but

illustrates the container with the opposite door open.

Figure 5 is a central vertical section through the container and illustrates the door-operating mechanism in dotted lines.

In the said drawing, where like reference characters identify corresponding parts in all of the figures, 1 illustrates a container of common and well known type which is adapted to be depressed by a predetermined weight of grain in one of its compartments, as will hereinafter appear.

The container is divided centrally by a partition 2 into two compartments A and B, closed at their bottoms by hinged doors 3 and 4 as common in the art. In operation the container will be suspended from a scale beam by any suitable means and means will be employed for discharging the commodity to be weighed into the compartment having its door closed. hen a predetermined quantity of grain has entered the compartment having its door closed, the device as a whole will move downward, and a latch holding the doors in fixed position will be tripped, thus releasing the doors for operation by the weight of grain on one of them, as will hereinafter appear.

Pivoted to the respective doors 3 and 4 at one side thereof, are links 5 and 6, each of which will normally, when its door is either open or closed, stand at a slight angle to the vertical, and the upper ends of said links are respectively pivoted to bell-crank levers 7 and 8, pivoted to the container at or near the upper edge thereof. The opposite endsof the bell crank levers are pivoted to the ends of a connecting link 9. The pivotal point of bell-crank lever 8, for example, may be continued in the shape of a rod or shaft 10 for operation of the cut-off or deflector, not shown, if found desirable, though; it will be understood that any other suitable connections may be employed to carry out this operation.

In operation (see Figure 1), assume compartment B has been filled with grain and the container has moved downwardly and the door latch mechanism has been tripped to free the doors for operation. Referring to the position of the bell-crank levers, it will be seen that open door 3 has a greater leverage to. resist closing movement than door 4 to open, but it will be understood that the weight of the grain will more than counterbalance this increased leverage and that as soon as the doors have attained their half-opened positions, the leverage is equal (see Figure 3), but that the leverage thereof fromsuch point until the position shown byFigure 4, has been attained. is increasing for door 4: and decreasing for door 3, and. therefore, even if the entire amount of grain in compartment B has been discharged before door 4 is fully opened, still the increase in leverage this door will have over door 3 will be such that it willefliciently and entirely swing door 3 to fully closed position regardless of obstacles such as grain or the like, which may be caught between the walls of the container and the door, and hold said door closed until the latch mechanism (not shown) has had ample time to function, as will be readily understood. The operation of the doors in the reverse direction is similar in all respects to that just described, it being understood, of course, that the scale first re-elevates the container and that the doors are then relocked in their new positions and the cut-off or deflector has been shifted to di rect the grain into the closed compartment, as fully described and illustrated in the application hereinbefore identified.

' From the above description it will be apparent that I have produced a device of the character described, which possesses all of the features of advantage set forth as desirable, and 'while I have described and claimed the preferred embodiment of the same, I reserve the right to make all changes properly falling within the spirit and scope of the appended claims. I

I claim:

1. In an automatic weighing device, a container having two con'ipartments, doors for respectively controlling said compartments at the bottoms thereof and adapted for simultaneous operation in reversed directions, similar levers mounted on the container, power-transmitting means connecting the doors and said levers. respectively, the means connected to the opemng door having an increasing leverage on its respective lever during its opening movement, and the other power-transmitting means having a decreasing leverage on its respective lever during its closing movement, and ,a link pivotally connecting the levers to transmit power from one door to the other.

In an automatic weighing device, a container having two compartments, doors for respectively controlling said compartments at the bottoms thereof'and adapted for simultaneous operation in reversed direction, similar bell-crank levers mounted on the container, links between the doors and said bell-crank levers respectively, the link connected to the opening door having an increasing leverage on its respective lever during its opening movement, and the other link having a decreasing leverage on its respective lever during its closing movement, and means to transmit power from one hellcrank to the other.

3. In an automatic weighing device, a container having two compartments, doors for respectively controlling said compartments at the bottoms thereof and adapted for simultaneous operation in reversed direction, similar bell-crank levers mounted on the container, links between the doors and said bell-crank levers respectively, the link connected to the opening door having an increasing leverage on its respective lever during its opening movement, and the other link having a decreasing leverage on its 1espective lever during its closing movement, and a. link pivotally connecting the bellcrank levers to transmit power from one to theother.

4. In an automatic weigher, a two compartment container, hinged wing doors controlling the discharge openings of said compartments respectively, a pair of separately pivoted oscillating levers, power transmitting means connecting the levers to said doors respectively, and power-transmitting means connecting said levers to each other whereby as either .door shall be opened the other door shall be closed; the relation of the levers to each other being such that as either lever shall, in its oscillating movement, carry the vertical plane of its connection with its door toward the fulcrum of the lever the other lever shall cooperatively carry the plane of its connection to its door further away from the fulcrum of said lever.

5. In an automatic weigher, a container having two compartments, hinged wing doors controlling the discharge openings of saidcompartments, a pair of similar levers separately pivoted and having power-transmitting connections with said doors respectively and with each other whereby as either door shall be opened the other door shall be closed, the relation of said levers to each other being such that the door connection of either door to its respective lever shall gain in leverage onsaid lever as the door opens while the other lever shall gain in leverage on its door connection as its door closes.

6. In an automatic weigher, a two oompartment container, hinged wing doors controlling the discharge openings of said compartments, a pair of similar rock-levers pivoted separately, power transmitting means connecting said levers to said doors respectively and connecting said levers to each other whereby as either door shall be opened the other shall be closed; the connections of said levers with each other being such that they shall be at an angle with each other, giving the opening door an increasing leverage as it opens and the closing door a decreasing resistance.

In witness whereof I hereunto afiix my

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