US112159A - Improvement in governors for steam-engines - Google Patents

Description

@anni didnt JOHN AUGUSTUS LYNCH, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 112,159, dated February 28, 1871.

IMPROVEMENT IN GOVERNORS FOR STEAM-ENGINES.

The Schedule referred to in these-Letters Patent and making part of the same.

To all persons to whom these presents 'may come Beit known that L JOHN AUeUsrUs LYNCH, of Boston, of the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Governors for Engines; and do hereby declare4 the same to be fully described in the following specification and represented in the accompanying drawing-,vof which- Figures l and 2 are side elevations, and

Figures 3A and 4 are vertical sections of one of my improved governors.

Figures 5 and 6 are side elevations of the helical lifter and rotator of the propeller.

This governor is of the kind where. the throttlevalve or gate to be actuated by it is moved by a screw-propeller revolving within a liquid contained in a cistern or vessel.

In the drawing the screw-propeller is exhibited at A as lixed on a carrier, B, having two legs, veach leg at its foot being provided with a wheel or frictionroller, a.

The said propeller and carrier turn freely on' a stationary tubular spindle, O, erected within the closed receiver or oil-case D.

The propeller-carrier is 4supported on the helical lifter E, which also revolves freely'on' -thc spindle C, and is arranged within the case D and below the carrier, such helical lifter being a bevel-gear having two helical cams bpb arranged on and projecting from it, and formed in manner as represented.

The lifter is supported on a bearing, c, of the case D, and engages with .a driving bevel-gear, F,.that is fixed on the inner end of, a horizontal shaft, G,.arranged and having a bearing in a tubular arm, H, projected from the hollow neck I, by which the propellercase is connected with the outercase K.

` A driving-wheel, rl, to receive an endless band, is fixed on the outer end of the shaft G. l

rlhe neck I, closed'at bottom, opens at its upper part directly into the case D, in order that the liquid or oil may surround the operative gears and keep them and their rubbing surfaces and shaft suitably lubricated.

Encompassing that part of the spindle which extends above the propeller is a sleeve, or thimble, or tube, L, which rests on the hub of the propeller-and is closed at top. y

From such top a small wire, e, extends down through the spindle and the bottom ofthe case D, and thence through the top 'of the valve-case or a stuffing-box thereon.

At its lower end the said wire e is fastened to one end of a chain, f, which is laid on and fixedto the.

periphery of a sectoral arm, g, that projects from a throttle-valve, M, pivotcd within the induction-passage h of the valve-case, the eduction-passage of the valve-case being in any other convenient part of it.

The hollow neck Iis .arranged wholly on oneside of the common vertical axis ofthe valve and propellercases in order that access may readily be obtained to the studng-box 'i at the top of the valve-case.

Another chain, k, fastened to the sectoral arm of the' valve, extends down the periphery of such arm, and is fastened to the upper end of a cylindrical thimble, Z, containing a helical spring, m, which rests ou the hollow of. the thimble.

The thimble is disposed concentrically within a tubular arm, n, projecting obliquely from the lower part of the valve-case, and being closed at its lower end,

except in having a passage through .the center thereof to receive a screw-rod, o, that screws into the lower end of the arm.

At its upper end the rod has a head, 1J, against which thetop of the helic'al spring m bears. On revolvingthe rod the helical spring may be either-contracted or extended, more or less, either to increase or diminishits power or tension, as occasion may require.. The spling is. to effect the opening ofthe valve, or its movement in a direction contrary to that in which it may be moved by thel action ofthe propeller.

From the above it will he seen. that, while the engine may be in operation, the band for actuating the driving-pulley of the governor' will be in action, and such pulley will be kept in revolution, thereby cans'- ing the bevel-gear F to revolve and turn the helical lifter. r[his latter, by its action against the carrier of the propeller, will set such carrier in rotation so as to revolve the propeller.

As the propeller may tend to rise within the liquid, the carrier will be borne against the inclined planes or helical cams of the lifter; consequently fthe helical lifter, besides effecting rotary motion of the propeller, will Yperform another function, that is to say, it will aid in effecting the rise ofthe propeller.

The lifter, by thus favoring the rise or upward niotion of the propeller, renders the governor muchv more sensitive, its sensitivenessbeing increased with the diminution of the pitch of the` helical plane or planes of thelifter. i

Inasmuch as it is'very desirableto avoid friction as much as possible in the action of the parts of a governor of this kind, all such friction tending to diminish its seusitiveness, have adopted the yvery tine wire e to operate the valve by tension rathcrthan thrust.

In the said governor I claim- 1. The combination of the helical cam-lifter E with the propeller A audits case D, all being to operate substantially in 'manner as desoribed.

2. The propeller-case neck I, made as an oil-reser Voir to open into the body of the case D, and arranged with the driving-gear F, the valve-wire e, and the valve-ease K, substantially iin manner as deseribed.

3. The combination of the spr/ing m, provided with means for varying its tensonas described, with "tlli'e valve. M, .the propeller A, its case D, and the helical cam-lifterl E, all. being arrangedl and combined substantially in manner and s'o as to operateas de4 scribed.

1 J.. AUGUSTUS LYNCH, Witnesses:

R. H. EDDY, J. R. SNOW.

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