Portable data transferring machines operable from either dc or ac current

Claim 1

A PORTABLE DATA TRANSFERRING DEVICE CAPABLE OF OPERATING FROM AN EXTERNAL AC POWER SOURCES AND FROM A SELF-CONTAINED DC POWER SOURCE, COMPRISING: (A) AN OPERATING MECHANISM; (B) A DC MOTOR OPERATIVELY CONNECTED TO SAID OPERATING MECHANISM; (C) A RECHARGEABLE BATTERY ADAPTED TO OPERATE SAID MOTOR; AND (D) BATTERY CHARGING AND MOTOR OPERATING CIRCUIT MEANS FOR SELECTIVELY EITHER CONNECTING SAID MOTOR TO SAID BATTERY OR CONNECTING SAID MOTOR AND SAID BATTERY TO AN EXTERNAL AC POWER SOURCE, COMPRISING: (1) A TRANSFORMER HAVING A PRIMARY ADAPTED TO BE CONNECTED TO THE EXTERNAL POWER SOURCE; (2) CIRCUIT MEANS CONNECTING SAID MOTOR ACROSS THE SECONDARY OF THE TRANSFORMER; (3) CIRCUIT MEANS CONNECTING THE BATTERY TO SAID SECONDARY AND SAID MOTOR; (4) MEANS FOR RECTIFYING THE CURRENT SUPPLIED TO AND THE VOLTAGE APPLIED ACROSS SAID BATTERY AND SAID MOTOR BY SAID TRANSFORMER; (5) CIRCUIT MEANS CONNECTING SAID BATTERY IN SERIES WITH SAID MOTOR; AND (6) A TWO-POSITION SWITCH MEANS SELECTIVELY OPERABLE IN ONE POSITION THEREOF TO INTERRUPT THE MOTOR-TRANSFORMER SECONDARY CIRCUIT AND COMPLETE A FIRST TRANSMFORMER SECONDARY-BATTERY CIRCUIT, WHEREBY SAID BATTERY MAY BE CHARGED WITHOUT OPERATION OF SAID MOTOR WHEN THE TRANSFORMER PIRMARY IS CONNECTED ACROSS THE EXTERNAL POWER SOURCE TO ENERGIZE THE TRANSFORMER; (7) SAID SWITCH MEANS BEING OPERABLE IN THE OTHER POSITION THEREOF TO SIMULTANEOUSLY COMPLETE THE TRANSFORMER SECONDARY-MOTOR AND BATTERY-MOTOR CIRCUITS AND A SECONDARY AND DISTINCT TRANSFORMER SECONDARY-BATTERY CIRCUIT, WHEREBY SAID MOTOR CAN BE OPERATED FROM SAID POWER SOURCE AND SAID BATTERY SIMULTANEOUSLY CHARGED WHEN SAID TRANSFORMER IS CONNECTED TO SAID EXTERNAL POWER SOURCE AND SAID MOTOR OPERATED FROM SAID BATTERY WHEN THERE IS NO CONNECTION BETWEEN THE BATTERY AND THE EXTERNAL POWER SOURCE.