Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-07-06
1995-07-25
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
3404071, H04Q 700
Patent
active
054366224
ABSTRACT:
A portable vibratory alerting device (20) is part of a resonant system (20, 30) and has a resonant vibrator (60) for both generating a vibrational alert and sensing the resonant frequency of the resonant system. The vibrator (60) is driven by a variable frequency driver (76, 78), and thereafter the resonant frequency is measured by a sensor (82). A vibration controller (72) causes the frequency of the vibrator to be substantially equal to the resonant frequency of the system.
Alternately, a portable alerting device (520) has both a vibrator (160) and a sensor (166) for sensing the amplitude of a vibratory alert at various frequencies. A vibration controller (72) generates a vibratory alert at an optimum frequency in response to the sensed amplitudes.
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Gutman Jose
Rasor Gregg E.
Lamb James A.
Merz Edward
Motorola Inc.
Yusko Donald J.
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