| 摘要 |
A piggyback amplifier for use in combination with a telephone handset. The amplifier is housed in an elongated casing which is shaped in accordance with the handle of a telephone handset. The amplifier has a pair of conductive rods which extend from one end of the case which are so disposed that the rods may be inserted into the openings which are provided in a telephone handset for input leads. The amplifier case has means for securing the amplifier to the handset. The case also has openings to receive the input leads so that the input leads will be connected to the input terminals of the handset via an audio amplifier.
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