US79528A - Improvement in eeodlating-deyioe of millstones - Google Patents

Description

S. BENSON.

BBGULATING DEVICE FOR'MILLSTONES.' No. 79,528. Patented June 30, 1868-.

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SAMUEL BENSON, OF OENTRALIA, ILLINOIS, ASSIGNOR'TO HIMSELF, JAMES BENSON, AND JOHN F. BENSON, OF THE SAME PLACE.

Letters Patent No. 79,528, dated June 30, 1868.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, SAMUEL BENSON, of Gentralia, in the county of Marion, and State of Illinois, have invented a new and useful Improvement in Springs for Regulating the Motion of Millstones; and I do hereby, declarethat the following is 'a full, clear, and exact descriptionthereof, which will enable others skilled in the 'a'rt to make and use' the same, reference being had'to the accompanying drawings, forming part oi this specification, in which- A Figure 1 is a central vertical section of a rnill-spindle,with tny improved compensating-springs and trundle=- head attached. v I

' Figurati e, horizontal sectionof the springstakn in the line a: :e, fig. 1.

Similar letters of reference indicate like parts. I

The object of this invention is to provide the means of perfectly compensating for the check of'the engine while'passing dead-centres, and equalizing the motion of millstonos. This object is accomplished by means of spiralsprin'gs enclosed in disks, or a circular-case set upon the mill-spindle iiiconnection with the trundle-head, in such manner that the springs-are contracted by the'action of the inotive-power when ite'i'erts its greatest force in themore rapid part of the revolutions of the driving-shaft, and are retracted or expanded when the engine passes the dead-centres, and slacks the speed of the driving-shaft, thus applying the accumulated force of thecontraeted springs to -the propulsion of the spindle, to compensate for the loss of powe'r and motion directly imparted by-the engine, thereby effectually preventing the backlash of the machinery, and equalizing and steadyiug the moti on of the'spindlo and runner attached to it, as hereinaftervmore particularly described.

,Atrepre'sents a mill-spindle, on the lower end of which is keyed fast a bush or sleeve, B, which supports the trundle-head C,1that is loosely hung upon it. i Above the trundle-head the lower section, of a disk or spring-case, is hung looselyupon the spindle A, the underside of the diskesection 'D being provided with lugs, a a, that set within the web of the trundle-head, and catch upon the arms or spokes 1b of the wheel, foi the purpose of carrying the spindle by means of the upper section of the case D, which is rigidly keyed or otherwise fastened to the spindle, and is also secured .to the lower section 1) by means-of bolts in the rims or peripheries of the disks, which pass through slots in one of the sections, to allow them a limited reciprocating movement for the action of contraction and esipam sicnin the spiral springs E E, contained within the disks or ease as hereinafter described. v

I lhe springsjE E nre'formed in sections or segments, coiled spirally to fit in a circular hollowspace formed hycqual concentric grooves in the upper-and lower parts of the case, and facing each'other when the sections '1) and D are united.

The circular groove in the lower section D is. di'yided into two equal parts by partitions, c c, in ade fast and placed opposite each other," projecting so as to enter the groove in the section D, and the circular groove in the upper section D is'also'divided in. the same manner by-partiti'ons c 0', also made fast in it,'and projecting into the groove in D. v

When the upper and lower disks are put together, with their partitions set equally apart, the hollow space formed by the circular grooves in thenfis divided into four compartments, within which the spiral springs E E are laid, t

When the springs arein this: position'it will l e-seen that they may be contracted by the bearing of the' partitions in the grooves, acting as abutments against their ends when one of the disks is rotated, while the other-is held fast, and consequently, that when 'the force which contracts the'springs relaxes, they will expand,

and exert a-counteracting force. By this means they willoperate upon-the spindle to conipensate for the loss of speed and power when the engine passes herdead-cen t'res, and thus equalize the motion otfthe spindle and the millstone hung ppon it.

' The upper section '1) is made fnstto the spindle A, while the lower section-D is loose on the spindle, and the trundle-heed O is also loose upon the sleeve B, but when the trundle-heed is turned, its arms engage the lugs a a on the lower section D, and thus turn it until'the springs E Em-e contracted, and it engages the ripper section D by means of bolts in the rim, end rotates the spindle A,- to which the upper section D is made fast. The eccumulatedpomver of the contracted springs reacts when-the pressure upon them relaxes, and thus a compensating' poweris applied to the spindle to equalize the motion.

Having described my invention, I claim as new, and desire to secure by Letters Patent 7 The combination of the springs E E, the disk-sections D D, thevpinion'G; and the spindle A, arranged and operating substantially as and for the purpose herein described.

SAMUEL BENSON.

Witnesses:

J. O. GUNN, J. P. Wmson.

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