File:EB1922 Telephone - “Strowger” system diagram.jpg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:28, 21 November 2019 | | 827 × 664 (63 KB) | Bob Burkhardt | {{Information |description ={{en|1=“Strowger” system diagram (elementary circuit connexions): The calling subscriber on lifting his receiver operates relay “LR” which in turn operates “RR.” The impulses are received on “LR” whose armature falls back for each impulse placing an earth connexion intermittently on the circuit of “S” and “VM.” Both “RR” and “S” are sluggish relays that release slowly so that the succession of “breaks” and “makes” from the impulses do not affect them. When the lo... |
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