Ring mounted combination whistle and stopwatch

Details Ring mounted combination whistle and stopwatch Ring mounted combination whistle and stopwatch

G - Physics

04

F

G04F 3/06 (2006.01) A63B 71/06 (2006.01) G04B 47/00 (2006.01) G04G 5/00 (2006.01) G10K 5/00 (2006.01)

Patent

CA 2522475

A combination featuring a housing supporting a clock circuit with an internal clock, and an audio frequency generating apparatus integrated into the housing, in which the clock circuit is manually operated only in a first preferred embodiment is disclosed; while the clock circuit is responsive to a pre-selected frequency of the audio frequency generating apparatus in a second preferred embodiment is further disclosed. Preferably, the audio frequency generating apparatus takes the form of a whistle that incorporates a plurality of tone notches. Each tone notch produces an audible frequency slightly out of phase with the audible frequencies produced by the remaining tone notches. When a user selects an automatic mode for operating the combination in the second preferred embodiment, one of the plurality of frequencies produced by the tone notches (having been previously selected) is sampled by the clock circuit to activate and deactivate the internal clock.

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