Appeal No. 1998-1231 Page 10
Application No. 08/729,835
set by the voltage V , and is braked by activation of stop
L
switch 20 in response to stop signal ST so that door 5 will
move at high or low speed.
It is clear from the above teachings of Yoshida that door
5 moves at a high speed V , and when the door approaches the
H
wall, the speed of the motor M and door 5 are set to a low
speed V We are in agreement with appellants that Yoshida
L.
only sets a high or low speed for the motor and door, and does
not relate to preventing motor torque disturbances from
affecting the velocity of the door. Yoshida generates motor
control signals to control the speed of belt 4, which is
directly connected to door 5. However, there is no suggestion
in Yoshida that the motor control signals prevent motor torque
disturbances from affecting the velocity of the belt and door.
The examiner tries to avoid the limitation by asserting
that “[i]t is not seen where maintaining a precise velocity
presents structure over Yoshida et al.” However, we find that
claim 1 specifically recites a “controller” responsive to the
first and second signals “for generating a motor control
signal.” The language “to prevent motor torque disturbances
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