Induction Coils. 



979 



62 571. 1 : 10. 



(3) For Motor Interrupters, with Condenser, without commutation or Primary Coil. Type E, cf. Fig. 62,571. 



(4) With Mercury Interrupter, with Condenser and Ruhmkorff Commutator. Type F, cf. Fig. 62,613. 



(5) With Platinum Interrupter, with Condenser and Ruhmkorff Commutator. Type G, cf. Fig. 62,624. 



(6) With Mercury and Platinum Interrupters, with Condenser and Ruhmkorff Commutator. Type H, cf. Fig. 62,636. 



(7) With Platinum Interrupter of special construction having very thick platinum contacts, with Condenser, Ruhmkorff 



Commutator and Spark Gap for Wireless Telegraphy and Rontgen Ray purposes. Coil not detachable. In carrying 

 case. Type J, cf. Fig. 62,641. 



(8) With Platinum Interrupter, as before, and with Mercury Interrupter; with Condenser, Ruhmkorff Commutator and Spark 



Gap for Wireless Telegraphy and Rontgen Ray purposes. Coil not detachable. In carrying case. Type K. 



(9) With Platinum Interrupter: for Glow Lamp Factories; with Condenser, Ruhmkorff Commutator and Glow Lamp Holder. 



Type L, cf. Figs. 62,624 and 62,624 a. 



II. Rontgen Ray Induction Coils, 



with low -resistance Secondary Winding, specially for Rapid Radiographic Work, 



and for Charging Condensers. 



(MM For Wehnelt Interrupters, without Condenser, viz: 



(a) Type R J A, with Multiple Commutator for varying the self-induction of the primary coil. 



(b) Type R .1 B. with Plug Commutation for varying the self-induction of the primary coil. 



(11) For Wehnelt and Motor Interrupters, with Condenser: 



(a) Type R J C, with Multiple Commutator for varying the self-induction of the primary coil. 



(b) Type R JD, with Plug Commutation for varying the self-induction of the primary coil. 



(12) For Motor Interrupters, with Condenser, without Commutation of Primary Coil Type R J E. 



The induction coils with Wehnelt and Motor Interrupters are worked as a rule with Direct Current from heavy current 

 mains. The most useful voltage for hoth types of interrupter and for coils having a spark length of over 300 mm, is 110. 

 Induction coils of below 300 mm spark-length work better with a pressure of 65 volts when Wehnelt Interrupters are used. 

 The Motor Interrupter yields good results with the considerably lower voltage, and can also be worked with cells or accumu- 

 lators. The minimum voltages necessary for the same are the following; which also hold good for mercury and platinum 

 interrupters: 



I'p to 200 mm spark-length 12 volts 

 350 

 400 



450 

 500 

 600 



16 

 24 

 32 



48 

 64 



The current consumption for the maximum spark-length is, for Motor Interrupters, about 3 5 amps.: for Welmelt 

 Interrupters with spark -lengths to 300 mm, approx. 30 amps.; above 300, approx. 20 25 amps. 



With pressures above 130 volts shunt resistances are absolutely necessary, and when possible they should be used 

 when employing Motor Interrupters. 



When ordering, kindly give particulars as to kind of current and voltage. 

 A test certificate and directions for using are appended to each Induction Coil. 



If desired, and at an extra cost of 5 per cent, we fit all our Induction Coils with suitable mica insulation for hot coun- 

 tries; this prevents deformation taking place in the insulating material. 



CJ. 28S7. 



62* 



