AUTOMATIC ANSWERING TELEPHONE SET

摘要

PURPOSE:To prevent the electric shock due to a telephone circuit and at the same time to omit a transformer by connecting a specific switch between a ground and a metallic part which is covered by a magnetic tape when the tape is loaded. CONSTITUTION:A switch 6 works in response to the shift of a magnetic head 3 and is turned off when the head 3 moves away from a cassette tape 8 and then turned on when the head 3 moves close to the tape 8 respectively. Then, the switch 6 is connected between a circuit earth and a metallic part which is covered by the tape 8 when this tape 8 is loaded. Thus, the generation of noises can be avoided despite omission of a transformer because said metallic part is connected to the ground when a message is recorded and reproduced. Then, the electric shock due to the voltage of a telephone line or an electric light line can be avoided because the metallic part is separated from the earth when the head 3 is moved away from the tape 8.