US1091624A - Charging device for concrete-mixers. - Google Patents

Description

E. W. BRACKBNBURY. CHARGINC DEVICE FCR CONCRETE MIXBRS.

OATION FILED JULY 2 4, 1912. RENEWED DBO. 15, 1913.

Patented Mar. 31

C M W a WIT/VESSES.'

B, W7 aM ATTUR/VEY JMW EDWARD W. BRACKENBURY, 0F

COMPANY,

" STATES;

MILWAUKEE, WISCONSIN, ASSIGNOR TO T. L. SMITH 0F MILWAUKEE, WISCONSIN.

CHARGING DEVICE FOR 'CONCRETE-MIXERS.

Specification of Letters Patent.

Patented Mar. 31, 1914.

Application lled July 24, 1912, Serial No. 711,280. Renewed December 15, 1913. Serial No. 806,911.

To all 'whom it may conc-ern Be it known that I, EDWARD W. BURY, a subject of the King of England` ie siding at- Milwaukee, in the county of Milwaukee and State `of Wisconsin, have invented a new and useful Charging Device for Concrete-Mixers, of which the following is a specification.

My' invention relates to Vimprovements in -charging devices for concrete mixers of that type in which the charging bucket is hinged or pivoted on a stationary part of the 1nachine frame, and the objects tion are to so apply the power for actuating the charging bucket as to obviate needless friction and strains,thus reducing the work done in charging the mixer to its lowestlimit, and still provide a simple, durable and practical machine.

Another object'is to vary the leverage at which the power is applied in proportion to the work being done at different times in the cycle of operation of the machine without in anywise complicating the device.

I attain these objects by the mechanism illustrated in the accompanying drawing, in which:

Figure l is an'elevation of the complete concrete mixer and charging device, and Fig. Q is an elevation of the charging bucket alone as viewed from Referring now to the details of the drawings, A is the rotatably mounted mixer drum having the feed or charging opening`B and the discharge opening C.V As the mixer may be of any usual construction and forms no part of my present invention, it need not be particularly described here.'

D is the supporting truck or skid frame on which the mixer is mounted and which also supports the hoisting shaft E. Two frames F are built on the frame D, one at each side of the mixing drum, and the top shaft G is carried by these frames. These frames F also carry the pivot shaft H which is connected to the charging bucket I. Two quadrants K K are att-ached to the charging bucket. one on each side thereof by means of the frame L. These quadrants are provided with grooves on their peripheries adapted to contain ropes or other flexible connectors M, one end of each of which is attached to one of the quadrants near the frame L, the other end of each being attached to one of the rope drums N on the top shaft G. This top BRACKEN- of my inventhe lea hand of Fig. 1. l

l shaft also carries at one end a larger rope drum or sheave O, to which is attached one y end of the rope I, the other end being attached to the rope drum Q on the hoisting l shaft E. R, S and T are, respectively, a friction clutch, a brake, and a driving gear l on the hoisting shaft.

The material which is to be introduced to the mixing drum is placed in the bottom end'of the charging bucket while in the position shown in full lines in Fig. l. As the friction clutch is thrown in, the shafts E and G are actuated until the bucket I is tilted or swung from its full line to its dotted line position shown in- Fig. l, when the material contained therein will slide along the scoop-like inclined side thereof into the mixing drum A through the feed opening B.

It will be noted that as the device commences its cycle of operation there is comparatively little lifting of the load, but more of a horizontal movement thereof. As the movement continues, there is more lift-ing and less lateral movement of the load until, after a movement through 90 degrees, the work being done is the maximum, and thereafter decreases until the position shown in dotted lines is reached. The work is, therefore, the lightest when the bucket starts on its excursion and the moving parts are being accelerated. At all times after the first few degrees of movement the rope M is tangential to the quadrant K and rope drum N and is, therefore, pulling to the best advantage on the pivot shaftI-I, and useless strain and friction on this pivot are' thus avoided.

In the design of the machine the radii of the three rope drums and the quadrant may be readily varied to suit the power available andthe speed of loading required. In order to increase the power by decreasing the speed of the bucket at different parts of its excursion, the radius of the quadrant may be variable in length, as'shown by the dotted line K, Fig. 1. It is also to be noted that the less radial distance there is from the center of gravity of the load to the pivot shaft 4, the less Will be the circumferentia distance through which the load must be tically below the pivot and the radius of the load is, therefore, the least possible for a given height of machine.

moved. In my device the buckethangs ver- `vsaid connector to pull What I claim is:

l. In a charging mixers, a charging bucket pivoted tothe machine fram'e, a hoisting device, a Wrapping connector attached to said bucket and to said hoisting device, and means causing on said bucket in a substantially constant direction.

2. In a charging device for conc-rete mixers,a charging bucket pivoted to themachine frame, a sector attached to said bucket,

hoisting means for swinging said bucket into charging position, and a Wrapping connector attached to and extending over the curved periphery of said sector and attached to said hoisting means.

r 3. In a charging device for concrete device for concrete mixers, a charging bucket pivot-ed to the machine frame, a sector attached to said bucket, hoisting means for swinging said bucket into ping connector attached to and extending over the Icurved periphery of said sector and attached to said hoisting means, said sector having radii proportioned to the different lifting efforts requiredv at dierent positions of the load.

In testimony Whereoi-QI have hereunto signed my name in the presenceof two wit nesses.

i EDWARD W. BRACKENBURY. i IVitnesses:

A. E. EGGERT,

LILLIE SGHUMACHER.

charging position, and a Wrap`

Images