Circuit and method for automatically sweeping through a plurality of siren modes
First Claim
1. A method of automatically producing a series of audibly distinct siren signals to form a composite siren signal comprising the steps of:
- setting at least one switch to a selected one of a plurality of positions;
selectively generating a first mode of siren signal during a corresponding first determined time period;
subsequently, selectively and automatically generating a second mode of siren signal during a corresponding second time period;
automatically repeating said steps of selectively generating said first and second modes of siren signals during additional corresponding first and second time periods, said first and second modes of siren signals being readily audibly distinguished from each other,whereby at least two distinguishable siren signals are producible without continued operator intervention.
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Accused Products
Abstract
A distinguishable siren sound pattern is produced within an emergency vehicle by automatically alternating the siren sound pattern from among a plurality of distinguishable types of separate siren sound patterns. One of said plurality of distinguishable type of sound patterns may be continuously generated or alternatively through momentary contact in a horn switch, automatically swept among a plurality of the distinguishable siren sound patterns according to a predetermined pattern. In the illustrated embodiment wail, yelp, high-low or hetro siren sound patterns are producible either through microprocessor control or through discretely switched waveform generators. The siren sound pattern is automatically alternated between wail and yelp or between high-low and hetro according to manually switch configurations and momentary activation of a horn ring switch. Repeated activation of the horn ring switch toggles the circuit between a selected continuous siren sound pattern such as a continuous wail or high-low and between an alternating sound pattern as is described.
17 Citations
21 Claims
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1. A method of automatically producing a series of audibly distinct siren signals to form a composite siren signal comprising the steps of:
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setting at least one switch to a selected one of a plurality of positions; selectively generating a first mode of siren signal during a corresponding first determined time period; subsequently, selectively and automatically generating a second mode of siren signal during a corresponding second time period; automatically repeating said steps of selectively generating said first and second modes of siren signals during additional corresponding first and second time periods, said first and second modes of siren signals being readily audibly distinguished from each other, whereby at least two distinguishable siren signals are producible without continued operator intervention. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of generating a composite siren signal comprising the steps of:
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generating a first mode of siren signal of a first type during a corresponding first period; generating a second mode of siren signal of a second type during a coresponding second period, said first and second modes of siren signals being readily distinguishable; and automatically alternating between said steps of generating said first mode and said second mode of siren signal, whereby an attention-getting siren is automatically generated without continued operator intervention. - View Dependent Claims (17)
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18. A circuit for generating a distinguishable siren signal comprising:
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first means for storing a plurality of mode commands, each corresponding to separate combinations of siren modes; seconds means for automatically scanning said plurality of mode commands stored within said first means for storing, said second means for scanning coupled to said first means for storing; third means for automatically generating a combination of siren modes; fourth means for automatically selecting at least two of said plurality of distinguishable siren modes according to a selected one of said mode commands stored wtihin said first means for storing as scanned by said second means for scanning, said fourth means for selecting being coupled said second means for scanning and said third means for generating, whereby a plurality of distinguishable audible signals is automatically generated without continued operator intervention. - View Dependent Claims (19, 20, 21)
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Specification