equently necessary to place the va- The cylinder is rotated by means of the pointer The springs are provided at i with notches to re- rious conductors in communication, so that messages which traverses a dial face upon the exterior of the ceive the teeth of the connecting bars, as shown in may be… … 1. The cylinder and the springs at the right per- LEWIS'S PERMUTATING TELEGRAPH SWITCH. tain to wires that lead be- connecting bars, or their the operator a certain pre-arranged set or combina- equivalent devices, and may con- low to screw cups under the case, 2. The springs acting against nect…
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