Title:
FIRING DETECTOR IN POWDERED-BODY SPRAY BOOTH
Document Type and Number:
Japanese Patent JPS62241571
Kind Code:
A
Abstract:
A system (10) for detecting fire in a powder spray booth having a spray gun (12) for depositing powder onto products (18) moving through the booth includes a switch (62) mounted to the spray gun (12) which is operatively connected to a control system (42) which operates the booth and controls the supply of powder to the spray guns (12). A spring biases (80) the switch toward an open, operating position in which a signal is sent to the control system (42) to shut down the booth operation and powder supply. Under normal operating conditions, the spring force is overcome by a switch closure mechanism which comprises a fixed rod (52), and a movable rod (72) mounted to the switch (62) which is pulled toward the fixed rod to close the switch by a burnable filament (82) extending between the rods and positioned in the path of the powder discharged from the spray gun (12). If a fire starts in the booth, the burnable filament (82) is immediately destroyed and releases the movable rod (72) so that the spring (80) is permitted to move the switch (62) to the open position. In turn, the switch (62) sends a signal to the control system (42) to shut down the supply of powder to the spray guns (12) to extinguish the fire.
Inventors:
DON AARU SUKAABOROO
Application Number:
JP8492487A
Publication Date:
October 22, 1987
Filing Date:
April 08, 1987
Export Citation:
Assignee:
NORDSON CORP
International Classes:
A62C3/00; A62C31/00; B05B5/08; B05B12/12; B05B15/12; (IPC1-7): A62C3/00; A62C37/30; B05B15/12
Attorney, Agent or Firm:
Masao Okabe