US845990A - Feeding device for concrete-mixers. - Google Patents

Description

PATENTED MAR. 5, 1907.

No. 845,990. f

R. WILCOX. EEEDING DEVICE ECR CONCRETE MIXERS.

APPLICATION FILED JALB, 1906.

2 SHEETS-SHEET l.

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PATENTED MAE. 5, 1907.

E. WILGOX.

PEEDING DEVICE EUR CONCRETE MXERS.

APPLICATION FILED JAN. 8, 1906.

2 SHEETS-SHEET Z.

UNITED STATES OFEIOE.

RAY WILCOX, OF DETROIT, MICHIGAN, ASSIGN OR OF ONE-HALF TO CHARLES R. WALLACE, OF JACKSON, MICHIGAN.

FEEDING DEVICE FOR CONCRETE-MIXERS.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed January/,8, 1906. Serial No. 295,063.

l'o all whom 'llt may concern;

Be it known that I, RAY WILooX, a citizen of the United States of America, residing at Detroit, in the county of INayne and State of Michigan, have invented certain new and useful Improvements in Feeding Devices for Concrete-Mixers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to new and useful improvements in cement-mixers, and consists in a novel construction and arrangement of parts, as will be more fully hereinafter described, and set forth in the claims.

In the drawings, Figure 1 is a side elevation. Fig. 2 is an end elevation of my cementmixer, and Fig. 3 is a plan view of the mixer with aportion broken away to show the construction.

A is a frame preferably mounted on wheels A and carries in the upper-portion cement and sand hoppers B and C, respectively. These hoppers are-preferably trough-shaped and open at one end, through which they feed by means of screw conveyers C, mounted on a shaft (J2 in the sand-hopper, and B, mounted on shaft B2 in the cement-hopper.

Shafts B2 C2 are jounaled in and project beyond the frame, and on the ends proj ecling beyond theforward end of the frame are slidingly keyed or splined the grooved collars b c, carrying lugs b c', respectively, said lugs being adapted to engage lugs b2 c2, respectively, on sprockets B3 C, which are sleeved on the shafts.

D and E are buckets or weighing-receptacles mounted on arms D and E', pivoted at of and e on the frame and carrying counterweights D2 E2, respectively. The tilting of the buckets on the pivots is limited by the bars a a of the frame, acting as stops to engage the arms D E', and the counterweights are adjustable longitudinally of said arms by means of set-screws d2 e2.

The bottoms of the buckets D E are hinged at F G, respectively, and provided with arms F G, to which are pivoted toggles comprising members fj and g g', the members of each toggle h: ving their ends pivotallv connected at f2 g2 and intermediate points f3 g3 on the members j" g being pivoted on the buckets D E, respectively. The free end of member g overlaps the free end of f and the pivot-pin of the connection g2 projects sufficiently to engage a depending V-shaped bracket G2 on the frame A, for a purpose which will be more fully hereinafter described.

On the upper portions of the forward ends of the buckets D E are lugs H J respectively. These Alugs are pivotally connected, by means of links It j, with the lower ends of the bellcrank levers H J, pivoted in brackets h y" on the frame A, and the upper ends of these levers engage in the grooves h2 of the collars b c, respectively. WV hen the bucketsvare tilted by a weight of material overbalancing the counterweights, they Awill act, through the links and bell-crank levers, to slide the collars b c longitudinally of the shafts, and thus draw the lugs on the collars out of engagement with the lugs on the sprockets.

The buckets are mounted below the feeding ends of their respective hoppers and directly above a V shaped receptacle K, through which passes a shaft K', carrying a screw conveyor lc. The shaft K is ournaled on the frame A, and on its projecting end is mounted a sprocket k, While its other end is secured in a spider-frame K2, secured in the mixing-cylinder L. This mixing-cylinder is provided with inwardly-projecting studs or vanes l, and the forward end is partially closed by the annular flange L', the rear end being left open and unobstructed for the removal of the mixed cement. rIhe cylinder L is preferably supported at the front end by the shaft K and at the rear end by rollers L2, suitably journaled in the frame A.

Secured to the frame in the rear of the cement and sand hoppers is a water-tank M, near which proj ects the rear end of the shaft C2. On this shaft is a crank M', connected to the plunger M2 of the pump m, which connects with the tank. A pipe N, terminating in a suitable spray-nozzle N in the mixingcylinder, leads from this pump and positively feeds water to thc mixture in proportion to the feed from the hopper C.

O is a bracket mounted on the frame, and in this bracket is journaled a stub-shaft O', carrying a sprocket O2 and a hand-crank o,

or, if desired, a suitable connection may be made from this shaft to any source of power,

and a chain P engages this sprocket and sprockets lc', B3, and U.

Having thus described the construction of my device, the operation is as follows: Cement and sand being placed in the respective hoppers and the power applied to chain P, the cement and sand is fed into the buckets. When the predetermined amount of cement is fed into the bucket D, the weight D2 will be oyerbalanced and the bucket tilted su'l'liciently to disengage lugs b b2, thereby stopping the feed from the hopper B. A '.lhe hopper C continues feeding until the predetermined amount of sand is deposited in bucket l, which then tilts and cuts off the feed from the hopper C. The pivotal points of the toggles connected to the bucket-bottoms are thus held raised until the tilting of bucket irl. ln tilting, the pin of connection g'2J is engaged by the bracket G2, and this point is thus pulled out of line, allowing the toggles to flex and the bottom to swing open. rlhe overlapping end of the member g then strikes the end of member f and throws out of line the toggles on thev bucket D and its bottom swings open. The contents of the buckets are thus dumped into the receptacle K and partially mixed while being fed into the cylinder L, where the mixing is completed and the requisite amount of water is supplied. The empty buckets are returned to normal position by the counterweights, and the bottoms of the buckets are returned by springs S, suitably connected to lugs R on the sides of the buckets and lugs T on the edges of the bottoms.

' it is obvious that the tilting buckets with hinged bottoms may be employed and that other feeding means and forms of hoppers and receptacles may be employed without departing from the scope of my invention.

-`What l claim isy 1. in a cement-mixer, the combination with a cement-hopper, a sand-hopper, and feed mechanisms for said hoppers, of a mixing-receptacle, tiltingly-balanced weighingbuckets for said hoppers intermediate said hoppers and said receptacle, means operated by the tilting of said buckets for automatically stopping said feed mechanisms, means operated by the tilting of one bucket for emptying both buckets and means operating on the emptying of said buckets for returning them to their original positions.

2. ln a cement-mixer, the combination with a cement-hopper, a sand-hopper, feeding means for each of said hoppers, and a mixing-receptacle, of a tilting weighingbucket for each hopper intermediate said hoppers and said rece taele, means whereby a predetermined weig it of material in one of said buckets will cause a tilting thereof, and connections whereby said tilting will stop the feed to said buckets, means whereby a preseaaeo determined weight of material in the second bucket will tilt the bucket and stop the feed thereto, and means operated by the tilting of said second bucket for emptying bothV buckets.

3. In a cement-mixer, the combination with a pair of weighing-buckets, a mixingreceptacle into which said buckets are adapted to empty, hoppers for saidbuckets, and feeding means for each hopper each adapted to feed into one of said buckets, break-joint toggle-lever connections for holding said buckets in their normal positions, connecting means whereby a predetermined weight of material in one of said buckets will permit a slight tilting thereof, connections whereby said slight tilting will cut oil the feed to said buckets, means whereby a predetermined weight of material in said second bucket will cut off the feed thereto, and means for emptying both buckets operated by the tilting of said second bucket.

4. in a cement-mixer, the combination with cement and sand hoppers, feeding means therein and a mixing-receptacle, of buckets intermediate said hoppers and receptacle, of supporting means for said buckets permitting the tilting of the buckets by the deposit of a predetermined weight of material therein, means operated by the tilting of said buckets for cutting off said feeding means, hinged bottoms for said buckets, means operated by the tilting of one of said buckets for swinging said bottoms on their hinges, and means for returning said bottoms to their normal positions.

5. ln a cement-mixer the combination with a plurality of hoppers, a bucket for each hopper, means for feeding materials from said hoppers into said buckets and a mixingrecepta'cle into which said buckets are adapted to empty, of supporting means for said buckets permitting a tilting of each bucket on the deposit of a predetermined weight of material therein, means operated by said tilting for cutting off the feed to said bucket and means operated by the tilting of one bucket for emptying all the buckets, for the purpose described.

6. in a cement-mixer, the combination with a plurality of buckets, means for feeding materials thereto and a mixing-receptacle into which said buckets are adapted to empty, of supporting means for said buckets permitting a predetermined weight of material in each bucket to tilt said bucket, means o erated by the tilting of each bucket to out o f the feed thereto, means operated by the tilting of the last bucket for emptying all thel buckets and means for returning the empty buckets to their normal position and restarting the feed thereto, for the purpose described.

7. in a cement-mixer, the combination ICO lIO

with a plurality of hoppers and' means for l eelding dmaterls tlerlefron, of la tiltirlglyin presence of tWo Witnesses.

a ance Wei 'n uc (et or eac o er, a. miJdng-recepgiacleg for receiving the piiiate- RAY WILCOX 5 rials from said buckets and means operated Witnesses:

by the tilting of one bucket vfor emptying l CAMERON B. WATERMAN both buckets, substantially as described. JAMES P. BARRY.

In testimony whereof I aiiix my signature

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