US568587A

US568587A - Weighing-machine

Info

Publication number: US568587A
Authority: US
Publication date: 1896-09-29
Anticipated expiration: 1913-09-29

Description

(No Model.) v 2 Sheets-Sheet 1., P. H. RICHARDS.

WEIGHING MACHINE". I

No. 568,587; Patented'Sept. 29, 1896? Witness es: In aen tor-n- (No Model.) 2 Sheets-Sheet 2. F. H. RICHARDS.

WEIGHING MACHINE.

Patented Sept. 29 1896.

Fig. 1

Witnesses:

PATENT rricn.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT.

WElGHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 568,587, dated September 29, 1896.

Application filed June 20, 1896. Serial No. 596,291. (No model.)

To aZZ whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in WVeighing-Machines, of which the following is a specification.

This invention relates to weighing-machines, and particularly to that class of weighingmachines adapted for automatically and continuously weighing out predetermined quantities of grain or other relatively freeflowing materials, and in which two connected valves, one a main valve and the other a supplemental valve carried by the main valve, are provided for controlling the flow of the stream into a bucket or load-receptacle, the object being to provide means for positively locking the supplemental valve against opening when in its closed position and for preventing the release, when the supplemental valve is open, of a member shiftable for discharging the bucket-load.

My present invention is especially designed and intended as an improvement on the weighingmachine described and claimed in my Patent No. 548,840, granted October 29, 1895, and on my other patents, No. 548,850, granted October 29, 1895, and No. 559,208, granted April 26, 1896, the first of which patents shows an automatic weighing-machine of the single-chambered type, having interlocking mechanism for positively controlling the movements of a main valve and a shiftable member or closer, and the last two of which represent a supplemental valve carried by a main valve substantially similar to that represented in such first-mentioned patent.

In the drawings accompanying and forming part of this specification, Figure 1 is a side elevation of the upper portion of a weighing-machine embodying my present improvements and representing the valves open and the stop-segment for controlling the discharge of the bucket-load locked to prevent the discharge of the load. Fig. 2 is a similar view showing the valves closed and the locking-segment released and thrown into position for preventing the opening of the Valves until the shiftable member or loaddischarger of the bucket mechanism is returned to its normal position. Fig. 3 is a front elevation of the upper portion of said machine. Fig. 4 is a side elevation, on a smaller scale, of a complete machine, the counterweighted valve-actuating lever not being shown; and Fig. 5 is a similar view of the upper portion of the machine, looking from the opposite side thereof.

Similar characters designate like parts in all the figures of the drawings.

My invention embodies, in connection with a shiftable member having a load-discharging movement for permitting the emptying of the load Weighed by the machine, a pair of stream-controlling valves, one constituting a main valve and the other a supplemental valve carried by the main valve and having a stream-controlling movement with respect to the main valve, and means operative with the supplemental valve forlimitin g the movement of the shiftable member while such valve is in its open position, and my invention also contemplates the provision of apair of mutually-dependent or reciprocally-effective means for preventing the opening of the valves until the shiftable member is in its locked position and formaintaining the shiftable member latched while the supplemental valve is open, said means constituting valveopening movement and load discharging movement limiters, the former operative with the shiftable member or closer and the latter with the supplemental valve.

Although I have represented my present improvements in connection with a weighingmachine of the type illustrated in the patent first hereinbefore referred to, it will be obvious that they are equally applicable to other forms of automatic weighing apparatus.

In the present instance the framework of the machine comprises two side frames connected at their upper ends by a top plate or beam. These side frames are designated herein by 2 and 4, respectively, and the top plate by 5. This top plate or beam is also represented as carrying the usual supply spout or chute H for controlling the flow of the stream of material into the load-receiver or bucket.

The bucket, which is designated in a genoral way by G, is, as before stated, of the single-chambered type, and is supported under the supply spout or chute for receiving the material llowing therefrom into the valves and thence into the bucket.

The main stream-controlling valve may be of any suitable construction, but is preferably substantially similar to the improved valve described in Letters Patent No. 535,727, granted to me March 12, 1895, and is illustrated herein at 70 as carried for oscillatory movement by arms or brackets 5, depending from the top plate 5, the pivot or axis of movement of the valve being designated by '70. This valve is shown located si'ibstantially below the mouth of the chute II and having its axis of movement passing through the stream of material flowing therefrom, the bottom or pan of the valve being adapted to form alternately a support and a chute for the material issuing from the chute II. The valve is preferably balanced so as to have normally no tendency either to open or close, the balan ee-weight being shown herein as a shaft 00, extending from opposite ends of the main valve.

[For the purpose of actuating the valve to close the same I prefer to employ a counterweighted valve'actuating lever 504:, having an antilriction-roll working against the face of a cam 500, depending from the axis ot' the valve 70, the construction of these parts being substantially similar to that represented in Patent No. 5-l8,8l23, granted to me October 20, 1895.

For opening the valve any suitable mechanism may be employed, for instance, that described and claimed in the Letters Patent lirst hereinbefore referred to, in which a valve actuating rod-such as 55Sis represented as operated by the return of the beam mechanism (herein designated in a general way by B) on the return of the bucket to its normal position after discharging its contents.

As will be obvious by reference to letters Patent No. 548,850, hereinbetore mentioned, the supplemental valve, which is illustrated at 72, is operative for controlling the dripstream supplied to the bucket after the principal portion of the load has been made up by the material passing through the main valve 70. This supplemental valve is shown herein carried at the forward or discharge edge of the main valve for oscillation thereon relatively thereto, and is also represented having connected thereto in the rear of its axis 0:1. movement "3 a link 81, secured to a rock-arm S0, lixed 011 the shaft 72, which forms the axis of movement of the valve 72. This link is, in turn, illustrated pivotally connected with the free end of a rock-arm 83, secured to a loeselymounted rock-shaft 8ft, carried concentric with the axis of the main valve 70, the left-hand end of said rock-sha3ft being represented in the drawings mounted in the journaled end of the left-hand trunnion or stud, which forms the center of support for the main valve at one end thereoi', while the opposite end of said rock-shaft is illustrated carried in a corres 'iendingjournal-opening in one side wall of the main valve. A second rock-arm .is shown at 85, secured to the rock-shaft Set, this arm being in the nature of a cam constituting a stop or load-diseharging-movement limiter J12, operative with the supplemental valve and adapted to cooperate with a corresponding stop or rocker 550, coi'itrolling the release of the shiftable member or load-discharger L.

The rocker is substantially similar to that illustrated in my Patent No. 5 1$,S-l0, it being pivotally connected with a connectingrod 596 for holding the bucket discharger or closer locked, and this rocker has a lockingface 1-13, cooperative with the iaees iii and 1-12 of the stop all? and constitutes a valveopening-movement limiter for preventing the opening movement of the supplemental valve and of the main valve when the parts are in the positions shown in Fig. 2.

The rocker 550 is represented having the usual detent- 550, adapted to be engaged by a latch. 82 when the closer is shut and the valves are open, the construction and operation of all of these devices being well. understood. Moreover, astop is represented provided at 723 on the main valve for limiting the throw of the supplemental valve in clesing, and the operation of this stop will also be obvious.

From the COHStl'llCtlOll oi the valve mech' anism and the interlocking stops hereinbefore described it will be apparent that when both of the valves are open and in the position shown in Figs 1 and lthe rocker 550 will be prevented from turning by the abutment of the stop-face =tl2" against the end. ot' the rocker-face i153, and that when the load is nearly made up and the bucket descends the valve-closing actuator 50-l will operate through the depending cam 500 to close the main valve in a manner well understood in. this art.

Any suitable meanssueh as the depending cam 506, cooperating with an antifrictionroller at the end of a rock-arm 507, oscillating with the valve 72 and about the axis thereot---- may be employed for actuating the supplemental valve to close the same; and for the purpose of insuring the positive movement of this valve to cut oil the drip-stream the face ell?" of the stop 4-12 on the valve '70 is suitably curved, so that when the rocker 550 oscillates it will ride over the cam-taco i152 and throw the supplemental valve positively to the position shown in Fig. 2, the step lid and the rock-arm 8-3 moving about the axis of the main valve and relatively to said valve 70, and said step 451.2 serving to look not only the supplemental valve but also the main valve against opening movements while the rocker is in the position shown in Fig. 2.

It will be apparent that such a combination of devices as that hereinbefore described, and illustrated in the drawings of this application, constitutes a very effective means for interlocking the operations of the supplemental valve and the load-discharger and for rendering the same reciprocally effective during the weighing operation.

Having described my invention, I claim- 1. The combination with a main valve, of a supplemental valve supported on the main valve for movement relatively thereto; valveactuating means; a shiftable member having a load-discharging movement; and a load discharging-movement limiter operative with the supplemental valve for limiting the movement of the shiftable member by the nonclosing of the supplemental valve.

2. The combination with an oscillatory 'main valve, of a supplemental valve supported on the main valve for movement relatively thereto; valve-actuating means; a shiftable member having a load-discharging movement; and an oscillatory load-discharging-movement limiter operative with the supplemental valve relatively to the main valve for limiting the movement of the shift able member by the non-closing of the supplemental valve.

3. The combination with a main valve, of a supplemental valve supported on the main valve for movement relatively thereto; a shiftable member having a load-discharging movement; and reciprocally effective valveopening -movement and load dischargingmovement limiters, the former operative with the shiftable member and the latter operative with the supplemental valve.

4. The combination With a main valve, of a supplemental valve supported on the main valve for movement relatively thereto; ac tuating means for closing the main valve; a shiftable member having a load-discharging movement; and reciprocally-effective valveopening movement and load -dischargingmovement limiters, the former operative With the shiftable member and the latter operative With the supplemental valve and having means operative by the valve-opening-movement limiter for closing said valve on the release of the shiftable member.

5. The combination With a main valve, of a supplemental valve supported on the main valve for movement relatively thereto; actuating means for closing the main valve; a shiftable member having a load-discharging movement; and reciprocally-effective valveopeningmovement and load dischargingmovement limiters, the former operative with the shiftable member and the latter operative with the supplemental valve and having connections with said valve for closing the same and also having a cam-face in position and adapted to be engaged by the valve-openingmovement limiter on the release of the shiftable member, to thereby actuate the load-discharging-movement limiter and close the supplemental valve.

FRANCIS H. RICHARDS. Witnesses:

FRED. J. DOLE, GEO. A. HOFFMAN.