B - Operations – Transporting – 05 – C
Patent
B - Operations, Transporting
05
C
32/4
B05C 15/00 (2006.01) B05B 15/12 (2006.01)
Patent
CA 1134129
ABSTRACT This invention teaches an improved exhaust system to be used with a paint spray booth and having a contin- uously operating power exhaust fan. The exhaust system has a damper that is opened when spraying actively is tak- ing place in the spray booth and that is closed when there is no spraying actively taking place in the spray booth. A control switch is mounted in any of several locations to determine when the spray gun is in use or is not in use. Thus, the control switch is actuated when the spray gun in hung up ... indicating a nonuse condition of the spray system; whereupon use of the spray gun lifts the gun from the hook to indicate spraying activity. A motor drives the damper to the opened position; and a spring biases the damper to the closed position. A timer is also used to delay the closing of the damper until between twenty and pos- sibly two hundred seconds have lapsed after spraying acti- vity has terminated. This purges the spray booth while yet allows for automatic damper control under normal spray- ing sequences of use and nonuse. A fire sensing switch is used to deenergize the damper motor to allow the damper to be closed in the event of a fire.
342703
Macrae & Co.
Protectaire Systems Co.
LandOfFree
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