US74480A - Hokatio andeb - Google Patents

Description

H. ANDERSON.

SAFETY VALVE.

No. 74,480- Patented Feb 18, 1868.-

The drawing this patent is not I O R e a an insteinscrawler Letters Patent No. 74,489, dated a ruitry 18, 1868.

mrnovsusnr IN sArnrr-vnivss.

on man: mam-1r in flgzs 32th:: hated amt urking part at tilt m, l

TO ALL WHOM IT'MAY GONCERN:' n Be itlmoiv'n that I, Hoa1rrro Aunnnsom'of Chicago, in the county of 0ook, iu the Statebf Illinois, have invented an Improved Steam-Generator Safety-Valve; 'and I ,do hereby declare that the following is 14; full and exact-description thereof, reference being bad to' the accompanying drawings, and to the letters of reference marked thereon, making apart of (his specification, in which- Figure 1 is" a vertical sectional elevation of my invention. v a Figure 2, an elevation of thesame, with the upper case removed, together with the valve-seat. Figure 3, a horizontal section taken through fig. 1 at the line A B. t Figured, a horizontal section taken through the line 0, same figure.

. Eigure' 5, a plan view of the'invention with the leverdetached.

, Figure 6, a plan view of the valve removed from the seat.

r The nature of my invention consists in the arrangement of a two-part case for enclos-ing the working partsof the valve, and having a series of holes in its top for the escape of steam andth e attachment of a plate, with slots near its periphery, to said case and below the aforesaid holes, for the purpose of preventing thevalve from being reached from the top and extra pressure oi steam put thereon; also, in a series of holes throughfthe bottomof the case for preventing the valve from being tampered with from-the inside of the boiler; and, further,-

in a-stop attached to the inside of the case, and used to prevent the lever from being" set-on the spindle and thus secure an over-pressure on the valve and in making the spindle to pass through the valve,and the applic ation of nuts on it for the purpose of holding the same'in position after it has been adjusted to recei e a required pressure-of steam, a slotted pivot-top being screwed on the top of the spindle, and used in connection with a, lever for testing the valve when pressure is not at a maximum, and for regulating the tension of a oa'psular spring without removing the lower part of the case from the boiler. In order to given. correct understanding of my invention, I letters, and will now give a detailed description. r V

Valve R, seat e, flange Z, stand T, spring S, spindle P, an d jamb-nuts c c, are descr led in a patent issued to Horatio Anderson, October 16, 1866, and are therefore not claimed in this specifics x. I U, figs. and 2, t

have marked corresponding parts with similar represents the lower part of a metal 'caseywhich encloses those parts of the invention a d to, a nd projecting k i i inside of the boiler, and has a series of holes, X, through its bottom, suflicient for tl sssage of "steam tothe valve, but not large enough for the jamb-nuts c c to betnrned from the insideofi the a ler. It also supports a flange, 1), arranged to be attached to the boiler in the usual manner, and a flange, w, -r securing itto flange z, fig. 1. The upper part H of the case is made of metal, and with flanges rt, ain't-securing it to the flange z, and with holes 0 o, &c., atthe top for the escape of steam; and has attached to the inside of its dome L a plate, M, having projecting arms, a, between which are openings 72 for steam to escape. It will be seen at fig. 1 that' the plate M has a greater diameter than the inside of the raised flange K, by which means a device,

put through the holes 0,- cannot reach the working parts of the valve R. The spindle P has a screw-thread turned through the valve R. as a not, and the upper end is screwed in a pivot-top, F E, whichytogether with nuts Gr J, is used both'to regulate the tensionof the spring Sand hold the spindle P in position when a adjusted. B B, fig. 2, represent lugs rigidly attached to the part H of theicase, and'used to support a bolt, A, a H and lever, t. This bolt is arranged with asuitable hole, D, for receiving an inspector's loch,and the lever t to pass through the pivot-top F E and test the working condition of the valve B, a stop,f, being rigidly attached to the inside of the case, to-prcvcnt the lever from being set on the'spindle-P, and thus secure an over prc'ssure of steam.

Operation.

When the spring S is to have a greater tension, that part of the case H should be removed from the flange a (after the bolts avand A have been loosened) and the nut J sl'acltened and the spindle I? turned out of ,valvej R by means of a wrench put on nut Ga Whena proper tension is secur.d',-'the nut-J should be tightened andthe nut G slackencd, so as to turn pivot-top E F down toits first positionrelative to stop f. V Q a Having describedtheconstructionandoperation of my invention, I claim- 1. The case U H, arran ed {with holes 0 .11, luge B B,

a dome L, flange K, and stop f, substantially as and for. the purpose heieili described. I Q

- 2. The heles o, in qombinatibn-with the plate M, snbstantiallyhs and for the purpose setsxorth.

3. The conibib atipe efle ez" t, piv 0 tto p E F,;a.n d stopf, substantially-as s'et fox- Ch.- 4. The combinatien of the pets G J', sp i'n@le 1, valyeR; and springs, as :ind for the purpose set forth.

HORATIO ANDERSON. Witnesses:

G. L. GHAPIN,

A. HAYWARD,

Images