Appeal No. 1996-3828 Page 8
Application No. 08/304,465
illustrated in Figure 2, by a compression spring 40. A baffle
lock bar 41 extends down through the adjacent keyways formed
in the baffles 36, the pressure plates 39, and the lower
baffle lock rings 37, at points intermediate the two adjacent
baffles at either end of the baffle arm 17. The lock bar 41
is spring biased downwardly by a spring 42 riding against a
shoulder 43 of a vertical pin 44 that is guided in a bushing
45 and a vertical opening in the baffle support arm 17
intermediate the two adjacent baffle holders 18. The upper
end of the pin 44 is provided with a finger gripping head 46
(see Figure 1). Thus, by grasping the head 46 the lock bar 41
may be elevated a sufficient amount such that the baffle 36
may be rotated through 90° and be removed from the baffle
locking ring 37 when desired. Each baffle is held firmly
within its lock ring by the downward force exerted by the
spring 40 against the pressure plate 39 which bears against
the upper surface of the baffle 36.
As best seen in Figures 1 and 3 of Irwin, the arm 17 is
provided with a rearwardly extending boss 48 which serves as
the pivot support for a vertical pin 49. The pin 49 extends
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Last modified: November 3, 2007