| 摘要 |
An electronic drag race starting signal unit includes a housing contained circuit provided with or energizing a series of race starting lamps. The race start indicator or Christmas Tree, which may be a series of LED's, are preferably three aligned amber or yellow lamps terminating in aligned relationship with a red lamp and a green lamp interposed betwen the red lamp and the adjacent yellow lamp. A manually held pushbutton switch, when closed, simulates a vehicle transmission brake and energizes the circuit to sequentially or simultaneously energize the yellow lamps followed by the green lamp which is the start signal. A counter in the circuit visually records the time lapse between the start signal and the release (opening) of the push-button switch by the operator which, if it is received before a predetermined time, energizes the red lamp as a disqualification.
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