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



263 



6278. 

 6279. 



6280. 



6281. 

 6282. 



6288. 



6289. 

 6290. 

 6291. 

 6292. 



No. 6278. 



No. 6290. 



No. 6288. 



FURNACES, CRUCIBLE, ELECTRICALLY HEATED 



FURNACES, Combined Crucible and Muffle, Hoskins Electric, Type FD, with crucible chamber 

 2 inches in diameter by 2% inches deep. Can be heated from room temperature to 1000C. in 

 30 minutes. Temperature should be controlled by means of a rheostat. Requires no special 

 'wiring as furnace may be connected directly to lamp socket. Maximum power consumption, 

 370 watts. The heating unit is easily rewound by user in case of burn out, as the refractory is 

 spirally grooved, and the resistance wire is furnished in a spiral coil ready to wind in the 

 grooves. The entire renewal requires but a few minutes. Complete with connecting cord and 

 plug. Shipping weight, 22 pounds. 



Xo A B 



For volts 110 220 



Furnace only $20.00 20.00 



Furnace with rheostat 28.50 28.50 



Not*: Larger furnaces of the same type as Xo. 6278 can be supplied on short notice, but are not 



carried in stock. Send for special bulletin on Electric Furnaces. 



RHEOSTATS, for use with Xo. 6278 where it is desired to hold the temperature stationary at 

 some point, or to control the variation in temperature, as h' annealing. 



No A B 



Voltage 110 220 



Resistance, ohms 26.2 105 



Each 8.50 8.50 



REFRACTORY only for Xo. 6278, without wire 1.00 



CHROMEL WIRE only for Xo. 6278, for rewinding. 



Xo " A B 



For volts 110 220 



Each 1.50 1.50 



Note: The use of a Pyrometer with Xo. 6278 is desirable, as it will enable the operator to know 



at all times the exact temperature within the furnace chamber. 

 ELECTRIC PYROMETERS, see Pyrometers. 



FURNACES, Crucible, Multiple Unit Electric, for temperatures up to 1000C., for continuous 

 duty. Adapted for melting metals, for determining the decalescent point of steel, and for 

 calibrating pyrometers. Can be brought from cold to 1000C. in 30 minutes. The heating ele- 

 ment is in two units, either of which may be quickly replaced by the operator if burned out. 

 Furnaces Xos. 82, 84 and 86 operate interchangeably on 110 and 220 volts. Xo. 80 is made for 

 either voltage, but must be used with rheostat when ordered for 220 volts. 



Xo 80 80 82 84 86 



For volts 110 220 110 & 220 110 & 220 110 & 220 



Diameter inside, inches 2% 2y 8 2% 3 3 



Depth inside, inches 2% 2% 4 3% 5 



Diameter over all, inches 7% 7% 7% 8% 8% 



Height over all, inches 8% 8^4 10 11 12% 



Rating of current for 110 volts, amperes. 3.55 . . . 4.4 5.0 6.6 



Rating of current for 220 volts, amperes. ... 3.55 2.2 2.5 3.3 



Maximum power consumption, watts.... 390 780 484 550 725 



Kilowatt hours consumed in reaching 



HOOT. (760C.) from 75F 095 .325 .20 23 .3 



Kilowatt hours consumed in holding 



UOOF. (760C.) 20 .40 .25 .325 .37 



Shipping weight of furnace, Ibs 16 16 22 25 30 



Shipping weight with rheostat, Ibs 20 30 26 29 34 



Furnace only 20.00 25.00 30.00 37.50 



Furnace with rheostat 28.50 30.00 33.50 38.50 49.50 



Heating units wound ready for use, each 2.75 2.75 3.50 3.75 4.75 



Refractory only 1.00 1.00 1.50 1.75 2.00 



Coiled wire only for rewinding 1.50 1.50 2.00 2.00 2.75 



