US881607A - Gage for tanks. - Google Patents

Description

PATENTED MAR. 1

' G. E. MUSGROVB.

GAGE FOR TANKS. 'A APPLICATION FILED sErT.17.19Qe.

/n Veriton Gorge 77ugr-ove lio Unire STAY-Tes PATENT fl GEORGE E. MUSGROVE, OF WILKIN SBURG, PENNSYLVANIA, ASSIGNOR TO GENERAL COMPANY, A CORPORATION OF NEW YORK. l

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ELECTRIC GAGE Fon TANKS.

` Specification of Letters Patent.

Patented March 1o, 19,08.

Application filed September 17, 1906, Serial No. 334,895.

This invention relates to gages for indicate ing the level of liquid in a tank. It is espe'- cially designed for use on a transformer oil tank, but 1s applicable to any rece tacle in which it is desirable to maintain t e liquid contents at a iven level, In an oil-cooled transformer, tie loss of oil is not readily detected, because the top of the tank is closed. It is, however, essential to the safe working of the transformer that the level of the oil shall not fall low enough to expose the windings. Ordinary' glass gage-tubes have been attached to transformer tanks, but itis difficult 'to make an'oil-tight joint at the pointswhen the gage-tube fittings pass throughthe wall of thetank. 'In order to avoid this trouble, the present inventionl utilizes the princi le' of -the Siphon, and consists of a gage-tu e connected at its lowerv -end with an inverted U-shaped tube which straddles the upper edge of the tank and is filled with` oil. The lower end of the leg inside the tank is turned upwardly to prevent all the oil in the-device from escaping from the gage in case the tank is emptied.

When the oi in the tank rises above the uptnrned end of the inner leg, a certain amount of oil flows from the inner leg to the outer, and the. oil inthe gagel tube rises to the same height as that in the tank, so that any variation of level in the :tank is accurately indicated in the tube.

In the accompanying drawing, Figure 1 is a side elevation of a transformer tank equipped with my improved gage, and Fig. 2 is a sectional elevation of the gage, on a larger-scale.

The tank 1 is of the usual construction:

the coils ofthe transformer being shown ,at v2.

'lhe normal level of theoil is at aboutthe line 8. The glass gage tube 4 is incased in a metal sleeve 5, cut away to expose the tube and screwed into a coupling 6 at its lower end. A'screw plug 7 is tapped intov the up er end of the sleeve and clamps the gagetu e cndwisegsuitable paekin 8 being interposed between the ends o said tube is drilled through said plug. A siphon tube in the form of an inverted U connects the gage-tube with the tank. Both legs' of thel U are preferably of the same length, and the 4lower end of one leg 1() communicates with the coupling 6, while the lowerend otthe other leg 11 is turned up in a loop short distance. i

In or near the up er edge of thetank 1'v above the level of t e liquid is a notch or openin the sip on, so that the leg 10- and the gagetube 4 hang loutside the tank, while the'leg 11 depends into the tank. The siphontube is filled with liquid, so that the rise and fall of the liquid in the tank causes a similar and the coupling and Iplug'. A vent hole 9 through which passes the b ight of.

variation in the columnof liquid in the ga etube, which thus indicates at all times t e height of the contents of the tank. The gage-tube kand the Siphon tube are long enough to extend a suitable distance above --and below the normal level of the liquid in the tank, so that said liquid can fall below the safet line` before it reaches the lower4 limit of t e gage-tube. This limit is deter? mined by the upturned end ofthe innerleg of the, si` hon. When the tank is emptied, a the lliqui in the ga e-tube will drop tothe level of the upturne end of the loop 12, but no farther, so that the gage is' always in condition to operate when the tank is filled again. ,If t willV automatically empty itself when the liquid inthe tank falls below the end of the inner be used.

e loop 12 is omitted, the device' leg 11 and must be refilled before it can l In the drawing,l thegage-tube is shown 4' extending u permissible variations of level, while the siphon must be high'enough to be at all times above the highest ossible level, and thus, it preferably stradd es the upper edge of the tank. y f

What I claim as new and desire to secure by Letters Patent of the United States, is,- 1. The combination with a tank, of an in verted U-shaped tube having one leg inside of said tank and the other leg outside, and a o'age-tube communicating with said outside eg said inverted U-shraped tubebeing iilledj with liquid.

2. 'lhe coml lation with ajtank, of'uan as highas. the big'ht of the siphOn, but t is is not essential, as the ga etube need be only long enough` to show-t eA i inverted U-shaped tube havin one legy i11- Side otsaid tenir and the other eg oustide, a Gage-tithe communicating With said outsile 'gljegf arid an upturned loop at the end of the 5 inside leg.'

3. The combination With a tank for liquid,

of u. gage-tuhe outside the tank, and a tube eomnmnieating with the ga e-tube at one engl land depending into sai liquid at the

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