US1219118A - Brake for corn-degerminators. - Google Patents

Description

M. LINDEMANN.

BRAKE FOR CORN DEGERMINATORS.

APPLICATION FILED Aue.25, 1915.

I 2 SHEETS-SHEET l' M. LINDEMANN.

BRAKE FOR CORN DEGERMINATORS.

APPLICATION FILED AUG-25, I915.

Patented Mar. 13, 1917.

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MAX LINDEMANN, OF EAST ST. LOUIS, ILLlIN'OIS.

BRAKE FOR CORN-DEGERMINATORS.

Specification of Letters Patent.

Patented Mar. 13. 1917.

Application filed. August 25, 1915. Serial No. 47,379.

To all whom it may concern Be it known that 1, Max LINDEMANN, a citizen of the United States, and resident of East St. Louis, St. Clair county, Illinois, have invented certain new and useful Improvements in Brakes for Corn-Degerminators, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in brakes for corn degerminator's, wherein the machine to which my brake is attached comprises two rotatable grinding elements, one of which is directly connected with power and the other driven by the material acted upon between the grinding elements. 4 The object of my improvements is to construct a braking means for the indirectly driven grinding element which will have a variable, constant braking action which will operate without overheating and which will wear longer and be subject to less repair and replacing of parts than the brakes now known to me.

In this specification I will give a full, clear and concise description of the construction and operation of my brake, in my claims specifically designate my novel construction and arrangement of parts, and in the drawings show the detail construction of the brake and its arrangement on a corn degerminator. I

In the drawings 1 Figure 1 is a side elevation of a corn degerminator equipped with a brake constructed according to my invention;

Fig. 2 is a cross sectional elevation of the machine taken on the line 22 of Fig. 1; and

Fig. 3 is an enlarged detail sectional elevation of one of the variable tensioned spring actuated rollers and its supporting bracket. Referring by numerals to the accompany- 1ng drawings:

5 designates the machine frame, having the bearings 6 which rota-tably support a shaft 7. Mounted on this shaft in a manner to rotate therewith is a frusto-ooni'cal bur or grinding element 8 and a pulley 9 for connection with power. Supported by the shaft, and surrounding the bur 8 is a second frusto-conical bur or grinding element which is free to rotate independently of the shaft and the bur 8. Corn or other material to be ground is applied to the space between the two burs through a hopper 10, which is supported on the machine, frame at or near the smaller end of the grinding burs.

i/Vhen power is applied to the shaft through the pulley 9 the inner bur will be positively driven and when corn or the like is supplied between theburs the outer bur will be carried along with the inner b'ur through the material being ground.

In order to check and control the speed of the indirectly driven, outer, grinding bur, to cause it to be rotated at a speed different from the directly driven, inner bur, I provide the outer bur with an annular outstanding flange 1O having an undulated peripheral surface presenting equi-distantly spaced teeth 11 whose crests are preferably acute and whose valleys are preferably arcuate.

Secured to the machine frame at, or approximately at, diametrically opposite points and in line with the flange 1O are the brackets 12, each of which is substantially U-shape and curvilinear in the direction of its length and have at their bases outstanding feet 13 for securing to the machine frame.

Pivotally mounted in each bracket is an arm 14: carrying in their free ends a roller 15 arranged to bear on the undulated surface of the flange on the indirectly driven grinding element. Acting on each arm is a spring 16 which exert pressure on the arms in the same general direction as the travel of the toothed surface to the end that the rollers are forcibly held against the teeth to offer a rolling resistance to the rotation of the outer grinding element.

By preference these arms and their rollers are arranged with such relation to the undulated surface over which they ride as to cause one roller to meet an obstructing tooth face while its companion is rolling freely over an unobstructing tooth face. By this arrangement there is constant and uniform roller resistance offered to the rotation of the outer or indirectly driven grinding element or bur.

In each bracket I mount a barrel 17 which incases the spring and prevents its lateral buckling, as well as a threaded stem 18 against which the spring impinges in opposition to the arm carrying the roller and which stem 18 provides for varying the tension of the sprlng as required for a variation in pressure of the roller against the undulated surface to produce a variation in the speed of rotation of the outer or in directly driven bur or grinding element.

Having thus described my invention, What I claim as new therein and desire to secure by Letters Patent of the United States therefor, is:

1. In combination With a power driven rotatable grinding element and an indirectly driven rotatable grinding element, a brake for the indirectly driven grinding element comprising a peripherally toothed annulus secured to the indirectly driven grinding element, a pair of oppositely arranged rollers, and means for exerting a yielding pressure on said rollers in the direction of the rotation of said annulus.

2.'In machine of the classdescribed, an inner, power-driven, rotatable grinding Copies of this patent may be obtained m five cents each, by addressing the Commissioner of Patents,

element, an outercgrinding element, not connected with power but rotatable along with the inner element by the material actedupon, a flange bearing spaced teeth secured to the outer element, oppositely disposed spring pressed rollers bearing on said teeth in the direction of rotation of the element, said rollers being relatively arranged so that While one is hearing on an obstructing MAX LINDEMANN. WVitnesses R. G. ORWIG, E. L. WVALLAon- Washington, D. C.

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