US445856A - Steam-pressure regulator for can e-mills - Google Patents

Description

' zsn eets sheet 1 S; M. MALI-IIOTK: G. A. ,LEJEUNE. STEAM PRESSURE REGULATOR FOR CANE MILLS.

NO. 445,856. Patented Feb. 3,1891.

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s. M. MALHIOT & 0. A. LEJ I STEAM PRESSURE REGULATOR FOR CANE MILLS.

Patented Feb. 3, 1891.

WW I% Q WITNESSES:

ATTORNEYS UNITED, STATES PATENT Felon.

SAMUEL MILLS MALHIOT AND CAMILLE A. LEJEUN 3, or AL EEMARLE, LOUISIANA.

STEAM-PRESSURE REGULATQR FOR CANE-MILLS.

SPECIFICATION forming part of Letters Patent No, 445,856, dated February 3, 1891.

Application filed September 23, 1890. Serial No. 365,887. (No model.)

To all whom it may concern.-

Be it known that we, SAMUEL MILLS MAL- H101 and OAMILLE A. LEJEUNE, both of Albemarle, in the parish of Assumption and State of Louisiana, have invented a new and Improved Steam-Pressure Regulator for (Jane Mills, of which the following is a full, clear, and exact description. Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of a cane-mill, partly in section, provided with our improved pressure-regulator. Fig. 2 is a vertical transverse section on the line was of Fig. 1 and g y of Fig. 3, and Fig. 3 is a horizontal section on the line .2 of Fig. 2. Fig. 4 is an end elevation of a portion of the mill.

The object of our invention is to provide means for maintaining a uniform pressure of the upper roll of a cane-mill upon cane passing through the mill, the pressure being of a character that will yield so as to allow the rolls to separate, so that a hard substance or an unusually large body of cane may be passed through the rolls Without injury to the machinery and without causing the stoppage of the rolls.

The features of novelty are hereinafter described in connection with others forming the complete mechanical pressureaegulator.

The shafts of the rollers A B are journaled in boxes 0 D, placed in the housing E. The lower journal-boxes D are supported in a fixed position. are capable of sliding in the housings. Yokes or caps F rest upon and move up and down with the boxes 0 and receive the bolts a, which extend through the housings, through the base G, through the fulcrum-bars ll, the plate I, and the cross-bars J. The bars H are each provided with a cylindrical steel bar Z), secured thereto and forming the fulcrums of the levers K, placed upon opposite sides of the machine and oppositely arranged with respect to each other.

The shorter arms of the levers K rest upon steel rollers c, which bear upon the upper face of the plate I, the said plate I being provided The upper journal-boxes C with side flanges cl for retaining the said rollers in place. The levers K are arranged in two series of three each. The outer ends of the said levers are connected by a cross-bar L. Under the bars L are arranged the steamcylinders M, containingthe pistons N, provided with piston-rods O, in contact with the crossbar-s L. The cylinders M are connected by the pipe P, which is provided with T e for receiving the steam-supply pipe Q. The pipe Q communicates with the steam-dome R, and is provided nearthe dome with a checkvalve f, a pressure-regulator g, which may be of any known form, a globe throttle-valve h, and an ordinary safety-valve 1', arranged in the order named. The steam-gage j, communicating with the pipe Q, indicates the pressure of the steam in the cylinders M. The bolts a, which extend through the yokes F, the bars ll, plate I, and cross-bars J, are provided below the said cross-bar J with keys 7c. \Vhen the steam is admitted to the cylinders M, it is reduced to the required working iiressure by the reducing-valve g-that is to say, the valve serves to reduce the steam-pressure in the cylinders M to the required degree regardless of the higher pressure in the boiler. For example, suppose the normal boiler-pressure in a factory to be one hundred pounds, but that only eighty pounds are required to be applied to the rolls. Then the regulatingvalve h is set to eighty pounds and the safety valve 2' to the same. When cane is introduced between the rolls A B, the upper roll A is lifted against the pressure of the steam in the cylinders M through the medium of the levers K. hen abodyof cane, whether it is large or small, is passed between the rolls, it is subjected to the same pressure with out regard to the distance between the rolls. hen an unusually large quantity of cane is introduced by uneven feeding and the upper roll is suddenly lifted, the downward move ment of the pistons N in the cylinders M causes the check-valve f to close, when the further movement of the pistons compresses the steam in the cylinders and in the pipes connected therewith. \Vhen the prescribed limit of pressure is reached, the safety-valve i opens, allowing the steam to escape, thus preventing any further increase in the pressure. As soon as the roll A assumes its normal position the check-valve f opens automatically and the operation proceeds as before. Each cylinder M is provided with a petcock Z for letting off the Water of condensation.

Although Wehave described our invention in connection With a cane-mill, We do not limit or confine ourselves to its particularuse, as the invention is equally applicable to crushing-rolls and rolls for analogous purposes.

Having thus fully described our invention, we claim as new and desire to secure by Letters Patent- The combination, with alower roll and an upper roll adapted to move vertically in suitable guides and bolts or rods connected with said upper roll and extending downward, as shown,'of the plate I, the levers K, fulcrumed on the latter and adapted to act on said rods, 7

plied to said pipe, as shown and described, to 25 operate as specified.

SAMUEL MILLS MALHIOT. CAMILLE A. LEJEUNE.

l/Vitnesses:

M. DUPATY, HUGUES LARRE.

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