262 STANDARD LUBRICATING OIL SYSTEM FOR GEARED TURBINES. 

 Oil coolers. Type or size. Maker's name. 



Griscom-Russell multi- No. ii6. Griscom-Russell Co., 



whirl oil cooler. 90 West St., New York. 



Schutte & Koerting oil No. 8. , Schutte & Koerting Co., 



cooler. Philadelphia, Pa. 



C. F. Braun. 300 square feet. C. F. Braun & Co., 



San Francisco, Cal. 



Note. — Oil coolers to have composition tube plates and brass or copper tubes. 



Oil strainers. Type or size. Maker's name. 



Schutte & Koerting du- 4-inch duplex. Schutte & Koerting Co., 



plex oil strainer. Philadelphia, Pa. 



Elliott twin oil strainer. 4-inch twin. Elliott Company, 



New York. 



Coen 4-inch duplex oil 4-inch duplex. Coen Company, Inc., 



strainer. San Francisco, Cal. 



DOCUMENT D. 



Automatic Electric Alarm for Control System — i. Purpose. — To prevent the 

 wrecking of turbine and gears due to failure of oil supply, by immediately sounding 

 an alarm and signaling the operator when oil level begins to fall in gravity tank, and 

 simultaneously speeding up the oil pump so as to restore the oil in tank to normal 

 level. 



2. Equipment. — ^The system shall consist of two float switches, one installed 

 on each gravity tank ; one alarm and operating panel installed at engine operating 

 station, on which are mounted one gong, one red light signal, two white light sig- 

 nals, two automatic throw-over switches for supplying current to the system from 

 generator or radio battery, one double-pole, single-throw, main-supply switch ; one 

 double-pole double-throw switch, for connecting separately each gravity tank float 

 switch, one panel installed in chief engineer's room with one gong, one red and two 

 clear light signals, one magnet operated steam valve installed in steam line to oil 

 pumps for controlling oil pump speed ; wiring and connections. 



3. Current supply. — Direct current is normally supplied from the lighting set 

 generator bus, and led to the system through two automatic throw-over switches. 

 These automatic switches have their main throw connected to generator bus and 

 auxiliary throw to radio storage battery. The switches are equipped with magnet 

 or low voltage release, connected across the generator bus, and in the event of 

 a shut-down of the generator automatically connect the system to the radio storage 

 battery, thereby insuring a continuous supply of current. 



4. Connections. — The alarm gongs and red light signals in the engine-room 

 and chief engineer's room are connected to float switches on gravity tanks, through 

 a double throw switch. This switch is thrown on the particular tank which at the 



