Appeal No. 2000-1944
Application 08/738,157
corresponding indicator lamps 84, attached to a request panel 88,
and an acknowledge panel 90, having push buttons 92 and
corresponding acknowledge indicator lamps 94. When a push
button 82 is depressed at an operator station 80, 81, to request
service/material/parts for that station, the corresponding
lamp 84 goes on and at the acknowledge panel 90 the corresponding
indicator lamp 94 also goes on. The operator at the acknowledge
panel arranges for the service/material/parts to be delivered to
the requesting operator and then depresses the button 92
corresponding to the lamp 94 which is lit. When the
corresponding acknowledge push button 92 is depressed, both the
indicator lamp 94 at the acknowledge panel and the indicator
lamp 84 at the operator station go off.
The purpose of Dahl is to provide a manually activated,
visible means of communication between an operator at the
operator station attached to a request panel and an operator at
the acknowledge panel. The Examiner states that "The Dahl
reference is used merely to show that light emitting means is
well known in the art and may be used to display that an
acknowledgment has been made" (FR14; EA6). However, since
Froehling does not teach or suggest an acknowledgment signal or
the need to produce a visible display of received messages at the
HVAC device it appears that the only motivation for the
modification is impermissibly based on Appellants' disclosure.
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