Appeal No. 1999-1789
Application No. 08/920,652
adapted to be located at a first location at which
the doorbell switch to be replaced is mounted and
adapted to be connected in series with the doorbell
chime to a pair of electrical power lines;
a push button switch assembly in said push
button unit, said push button switch assembly
including a pair of first and second normally open
and electrically independent switches and a manually
actuated push button mechanically coupled to said
pair of first and second switches, respectively, for
simultaneously moving said first and second switches
in response to movement of said push button, said
first switch adapted to be connected in series with
the doorbell chime to the power lines;
a radio frequency transmitter in said push
button unit for generating a radio frequency wave
and being connected in series with said second
switch, said transmitter and said second switch
adapted to be connected in series with the doorbell
chime; and
a remote unit adapted to be located at a second
location remote from the first location and being
responsive to said radio frequency wave for
generating an auxiliary acoustic frequency wave
representing manual actuation of said push button
whereby when the power lines are connected to a
source of electrical power and the doorbell chime
and said push button unit are connected in series
with the power lines, manual actuation of said push
button simultaneously closes said switches to
energize the doorbell chime and generate a source
acoustic wave at the first location and activates
said transmitter to generate said auxiliary acoustic
frequency wave from said remote unit.
The Examiner relies on the following prior art:
Levinson et al. (Levinson) 4,523,193 Jun.
11, 1985
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