US1290537A - Conveying and distributing apparatus. - Google Patents

Description

D. FRASER. CONVEYING AND DISTRIBUTINQAPPARATUS.

' APPLICATION FILED MAY 20. I915- Patented Ja11. 7, 1919.

glvwe'ntop UNITED STATES PAT NT oEFIoE.

DONALD FRASER, 0E MILWAUKEE, wrsconsm, ASSiGNOR r'o CHAIN EEL'r- COMPANY,

OF MILWAUKEE, WISCONSIN, A CORPORATION OFWISCONSIN.

CONVEYING AND'DISTRIBU'TING APPARATUS.

Specification o1 Lettcrslatent.

Patented Jan. '7, 1919.

Application nleana a0, 1915. Serial m. 29,391.,

"State of Wisconsin, have invented certain new and useful Improvements in Conveying and Distributing Apparatus, of which the following is a specification.

y invention relates to conveying and distributing apparatusand has for its object to produce meant; for controllingthe dis-' charge of a conveying receptacle that is adapted to traverse an overhead support, it

beingparticularly adapted for use in connection with a bottom-discharging-conveying bucket for receiving the'product. of a concrete mixing machine and delivering it to the desired place of use and there discharging it. The invention, however, is not 20 limited in its useful applications to the one use here specified.

In the accompanying drawin Figure 1 is aside elevation of suflicient parts .of a concrete mixing and distributing apparatus provided with my invention to illustrate the latter.

Fig. 2 is a cross sectional view taken on the line w'-w of. Fig. 1.

Fig.3 is a view, in side elevation, illustrating another embodiment of the invention. r l 1 In the drawings 2 indicates a portion of a concrete mixing machine of the rotary drum type, and 3, the framework located near the discharge, end thereof. 4 is a bracket supported by the framework in' which is mounted the vertical pivot, 5, of a horizontally adjustable boom 6 that constitutes a track or way along which travels a carriage 7 from which is suspended a conveying receptacle 8. The latter is preferably in the form of a bucket of the bottom discharge type, being provided for this purpose with a pair of hinged doors 9. These are arranged to open downwardly and to them are connected links or chains 10 that are in turn connected with the lower end of a curved locking linkll the upper end of which is pivoted to an arm 12 rigidly secured to an axle or cross shaft 13 suitably mounted, as in the carriage 7. A handle 14 is secured to the shaft 13 and serves as a means by which the doors may be opened and closed manually, and in the present instance is typical of any means, whether man-.

ually or automatically controlled, for closing the doors of the bucket. Automatic means for, this purpose are now so well known that they need only to be referred to to be understood. The arrangement for controlling the operati'on of the doors thus far describedis one well known in the art,'being disclosed and claimed in U. S. Patent No. 605,620 to Alfred M. Acklin, andconstitutes a toggle lock that holds the doors. securely closed, but is easily tripped and broken at will, allowing the doors to open by their weight and that ofthe load which they sustain when the break of thelock occurs.

A cable 15 is connected with the carriage for causing its traverse along the boom 6.

the means for driving this cable, as such means are well known in the art. Sufiice it to say that they are motor driven and under the control of an attendant having charge of the operation of the appartus.

The parts thus far described are not novel with me, and therefore not claimed herein.

v In order that the bucket may be dis- .I have not thought it necessary to 'disclose a free running cable 17. Such cable is in the form of an endless loop supported'upon I pulleys 18 suitably mounted near the respec:

tive ends of the boom. As represented it.

passes'through a perforation in the end of the arm 16, and has stops 19 secured fast -to it, one on either side of the arm, so as to insure that the cable shall be moved whenever the carriage and conveying bucket move.

The arm is loosely mounted upon the shaft 13 but is prevented from free rotation in one direction beyond. a certain limit, by a stop 20 carried by the lock link 11 with which the arm engages, and from free rotation in the other direction beyond a certain limit, by a stop '25 carried by the frame about its axis of support in the of the carriage 7. rangemcnt 15 that if the end of the lock link 11 is pivoted. As soon as the arm 12 is turned a short distance the toggle, lock already refprred to and that serves to hold closed the doors of the receptacle 8becomes broken :ind then the doors open, as'has bepn described. In turning to the discharging position here indicated, the shaft rotates iiidcpendently of the arm 16, which is held. from following the other arts in their rotat-ive movements by the cable 17. In order to move. the arm 16 and cause a suflicient rotation of the shaft 13 to break the toggle lock for the doors of the bucket 8, I employ means for arresting the free'movement of the cable 17, and. as

shown, such means consist of a brake 21 arranged to bear upon one of the pulleys 18 about which the cable 17 passes. and manually controlled means for operating the brake. The brake 21 preferably bears against the pulley located near the inner or pivoted end of the boom. and the means for operating it consist of a handle 21. prefer ably of bell crank form, a connecting link 23 extending axially through the vertical pivotal support for the boom. and a lever 22, this arrangement permitting the brake to be operated no matter what he the angle to which the boom may be set.

It will be understood that the-cable runs very freely so that it is moved by the arm 16 whenever the bucket and its carriage arc caused to traverse the boom. the drag of the cable upon the arm 16 when it is left free to run, being insufficient to cause the breaking of the lock that holds the bucket in chargereceiving condition.

The operation of the apparatus may now be'described. The bucket is brought back to the inner end of the boom to receive a charge from the mixing machine. Either manually or by automatically operating means the doors 9 are closed and locked. After the bucket receives its load it is run out along the boom by the cable 15, and as it moves the arm 16 travels with it and moves the cable 17, pulling the part. to which it is connected along with it. As the bucket reaches theiplace when its load is to be discharged the operator applies the brake 21, and thereby arrests the movement of the cable, while the bucket and its carriage are still advancing, with the result that the arm 16is rocked, in the direction of the arrow a. This, as has been described, causes a tripping of the toggle lock of the doors of the bucket, which thereupon open, allowing the load to be discharged. Before the bucket is returned to loading position the brake 21 is released, and as soon as the carsition, the 'cable 17, or the part thereof to which the arm is connected, following the arm on its return movement.

In Fig. 3 I have illustrated an arrangement slightly different from that described. Here the cable 17 instead of being an endless loop supported upon a pair of pulleys 18, has one end secured-to the upperend of the arm 16 and its other end secured to a. spring-controlled winding drum 26. Upon this drum bears a brake 21 like that already described. In operating with this form of my invention the cable 17 is drawn off from the drum as the bucket and carriage move outward along the boom. The tripping of the toggle lock is effected as in the other case by arresting the movement of the cable. \Vhen the parts are returned toward the inner end of the boom the spring 27 connected with the drum 26 rotates the latter in a direction to wind up the cable, as will be understood.

It is eyident that the cable is a device for operating a lock-that maintains the conveying receptacle in load-receiving condition, and is movable freely back and forth with the said recc tacle; and that the brake is a mechanical means for arresting the movement of the, said freely moving, locking operating device, so as to cause the lock to be, operated to permit the. receptacle to discharge; and my invention includes these features whether embodied in the specific arrangements shown or in other variations, modifications or equivalent forms thereof,

lVhat I claim isii 1. The combination of a supporting framework, a track extending therefrom, a carriage supported on'the track, a convoying bucket;suspended from the carriage, locking ineans for maintaining the bucket in load-receiving condition, means for causing the traversing of the carriage and bucket along the track, an arm pivotally supported on the carriage and free to have a limited rocking movement. and adapted when rocked to act on the locking means torelease the bucket for discharge, a cable connccted with the said arm and movable there with, and means under the control of the operator for arresting the movement of said cable whereby the arm is caused to be rocked and to operate the locking means.

2. The combination of a supporting framework. a track extending therefrom, a carriage movable along the track, power driven means connected with the carriage for moving it along the track, a conveying bucket suspended from the carriageihaving bottom closing doors, a toggle lock supported on the carriage and connected with the doors, holdinglhem closed, an arm pivoted in the carriage and arranged to act upon thv toggle, lock to break it and pormitthe doors to open, a mhlc connected with the arm near itfree PM and freely movable therewith as thv 'czu'ria ge traverses the track, and means under the control of the operator fm' arrusting Ilw muvvment of the cable at will whereby the arm is rocked to breakthe toggle lockl DORALD FRASER.

Witnesses:

C. W. LEVALLL'IY, \V. G. SARGENT.

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