Figure 2-7.--Rotary selector switch.

Figure 2-7.--Rotary selector switch.

one position, the rotor contacts bridge segments A-

this type. These switches are more common in

B and E-F, in the next position, the rotor contacts

civilian equipment than in military hardware.

bridge segments B-C and F-G. Diagonally opposite

pairs of contacts are subsequently bridged for the

TYPE J.-- The type J multiple rotary selector

remaining positions.

switch (fig. 2-8) consists of an equal number of

rotors and pancake sections. The number of

TYPE JR.-- The type JR switch (fig. 2-9) is

sections required in the switch is determined by

installed on recent IC switchboards. This switch is

the individual application. A shaft with an

operating handle extends through the center of

the rotors. The movable contacts are mounted on

the rotors, and the stationary contacts are

mounted on the pancake sections. Each section

consists of eight contacts, designated A to H, and a

rotor with two insulated movable contacts spaced

180 apart. Each movable contact is arranged to

bridge two adjacent stationary contacts. The

switch has eight positions. A detent mechanism is

provided for proper alignment of the contacts

in each position of the operating handle. In

12.71

Figure 2-8.--Type J switch.

Figure 2-9.--Type JR switch (4JR).

2-5