CENTRAL SCIENTIFIC CO., CHICAGO. U. 8. A. 



89 



No. 1398. 



No. 1400. 



1398. 



BLOWER AND VACUUM PUMPS, Cenco Rotary, Electrically Driven, for producing a blast for 

 the operation of blast lamps and for use with other laboratory devices requiring moderate air 

 pressure or vacuum. The blowers are of small size, very compact, and with few parts. They 

 are free from mechanical troubles and require practically no attention, except an occasional 

 oiling. They are mounted on a cast iron base, direct connected to an electric motor, and are 

 connected with a variable rheostat by means of which the speed and therefore the air pressure 

 can be varied. A snap switch is mounted on the same base for starting and stopping the motor. 



Specifications : 



Number of blast lamps operated simultane- 

 ously, 2. 



Vacuum at maximum speed, 17 inches of 

 mercury. 



Power consumption, 50 watts. 



Size of base, 8% x 8 inches. 



Height over all, 4 ] /4 inches. 



Range of speed, 600 to 2000 r. p. m. 



Pressure at maximum speed, 8 pounds per 



square inch. 

 Cubic feet of air per minute, 0.75. 



Complete as described with blower, motor, rheostat and snap-switch mounted on base with 5 feet 

 of cord and plug for attachment to any lamp socket. 



No A B C D 



A.C. B.C. 



For volts 110 220 110 220 



Each $40.00 45.00 40.00 45.00 



1399. BLOWER AND VACUUM PUMP only of No. 1398, with grooved pulley, but without base, motor 



or other accessories 12.00 



1400. BLOWER AND VACUUM PUMPS, Cenco Rotary, Electrically Driven, similar to No. 1398, but 



of larger size and capacity, with constant speed motor. 



Specifications : 



Size of base, 13 x 7% inches. 

 Height over all, 7% inches. 

 Speed, 1725 r. p. m. 

 Pressure, 10 pounds per square inch. 

 Cubic feet of air per minute, 1.4. 



Complete as described, with blower and % h. p. direct connected motor mounted on cast iron 

 base, but without rheostat, switch, or connecting cord. 



No A B C X> 



A.C. D.C. 



For volts 110 220 110 220 



Each 60.00 62.50 50.00 52.50 



1401. BLOWER AND VACUUM PUMP, only of No. 1400, with grooved pulley, but without base or 

 motor. . : 15.00 



Number of blast lamps operated simultane- 

 ously, 4. 



Vacuum, 20 inches of mercury. 

 Power consumption, 175 watts. 



