| 摘要 |
A double-bell ringing system of a telephone, including a base, a first bell and a second bell bilaterally supported on the base, a driving mechanism mounted on the base and controlled to reciprocate a reciprocating rod in striking the first bell and the second bell alternatively, the reciprocating rod having two plastic end pieces packed at its two opposite ends for beating the first bell and the second bell respectively, and a control bar mounted on the base and alternatively set between a first position where the control bar stops the reciprocating rod from striking the second bell, and a second position where the control bar is moved out of the path of the reciprocating rod for permitting the reciprocating rod to strike the first bell and the second bell alternatively.
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