US764015A - Pressure-gage. - Google Patents

Description

l 7:5. MEASURING AND TESTING 1 w-. ,1 l I u 1 l. l'r |55 BEST AVAILABLE CGPA PATENTED JULY, 1904.4

G.SPENGBR. www PRESSURE GAGE.

APPLIGATION FILED NOVJ.. 1903. l

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75. MEASURING AND TESTING Dm I sr'rm n s Copyi BLE CGPv BEST 'DN/MLA PATENTBD JULY 5. 1904 G. SPENCER.

'PRESSURE GAGE. 'APPLIQATIQN FILED Nov.19. 1903.

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eEsTrIA/miiete ooP` Patented July 5,1904.

PATENT OFFICE.

GEORGE SPENCER, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO CROSBY STEAM GAGE & VALVE CO., OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PRESSURE-GAGE.

SPECIFICATION forming part of Letters Patent No. 764,015, dated July 5, 1904.

l Application filed November l0, 1903. Serial No. 180,593. (No model.)

- Gages, of` which the following is a specification.

My invention relates to certain improvements in pressure-gages, and more particularly to the form and combination of the parts-namely, the gage-case, the gage-socket,

, the dial, and the mechanism or movement of the gage-and its object is to secure economy, simplicity, lightness, and strength in the combination and to greatly reduce the labor necessary in assembling the various parts.

The invention is illustrated by the accompanying drawings, in which- Figure l is the view of a gage as now made.

Fig. 2 is the View of a gage embodying my improvements.

Fig. 3 is a central vertical section through Fig. 2, showing in addition the dial T and screws t t.

Similar letters refer to similar parts in the two drawings.

Heretofore the pressure-gage case A has been made cylindrical with an inner iiattened y section a, to which is afiixed by screws a' a' the flattened middle portion I) of the gagesocket B, To this socket B are attached the 4springs (Bourdon tube-springs) C C, and to the gage-case A is attached the plate 7J, to which in turn are attached the pinion p', the toothed sector p2, and the plate p3, and also the dial, which is attached thereto by screws at the points Z d cl. In this arrangement some of the parts are fastened to the gage-case and some to the gage-socket, and. it is necessary to make the gage-case strong and heavy enough to support the parts attached to it. It is also necessary to fit most carefully and accurately the flattened portion t of the gage-socket to the flattened section a of the gage-casein order to have the center of the case register with the center of the movement or pinion p', to which is fixed the index-hand E, and the center of the dial, which is circular, fits in the gage-case and has a central opening through which extends the pinion p. This fitting together of the {iat-tened portions a and Z; requires a great deal of time and labor. avoid these dilculties, to pro/vide for the use of a case materially lighter/in weight, and to provide for the speedy and accurate assem-` bling of the several parts, I aiiix all of the parts to the gage-socket S and attach the gage-case G itself to the socket by a curvilinear contact,.`y

which insures the speedy and accurate a'sseml l .Y y

bling of the parts. is secured by making the gage-case cylindrical throughout itsinner surface (without the tlati This curvilinear contact j i. 6o

tened portion a) and turning that surface l smoothly and curving and turning smoothly the middle portion j' of the gage-socket S, forming it into an arc having the same radius as that of the gage-case. These parts are fastened together by the screws ss. VThe socket is furnished with studs f2 f2, to which the dial T is affixed by screws t t. these studs f2 f2 inperpendicular alinement with the vertical axis o f the gage-case I secure an arrangement that is desirable, though not essential. placed upon the socket, which has a threaded projection f3, by which it is attached to the pipe leading to the steam-boiler or other rese" The caseervoir for the storage of power. being relieved of all weight may be made of materially lighter proportions than formerly, thus reducing the weight of the gage and making it much more convenient to handle and to mount and less expensive. With this form of gage-case and gage-socket one can easily and economically repair broken gages, as the parts are interchangeable, a thing not heretofore possible. All the parts being fastened to the gage-socket as I have described there is also this advantage over the old form that no'springing of the case affects the index-hand.

What I claim as my invention, and desire to secure by Letters Patent, is-.

1. In a pressure-gage the combination, with thedoperaltiv plarts'of the agenechanism in clu fr t e ia of a cup-s ape gage-case an a gai-)Mthe latter contacting with the curved wall only of the case and in curvilinear By placing The weight of the gage is thus all l the operative parts of the gage mechanismin- `eluding the dial, of the cup-shaped gage-,caser Grr and the gage-socket S, the latter contacting, with the curved wall only of the case and 1nl eontct therewith; all the said operative parts I beingl supported by the gage-socket independently of the.v V@agie-ease; substantially as d escribed.

2. In a pressure-gage the combination, with curvilinear Contact therewith, all the said op- Esi AVAiLABLf-E eoPY era-tive parts being supported by the gagesocket independently of the gage-ease; sub-V stantially as described.

In testimony whereof I have affixed my signature in presence of two witnesses.

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