Fire protection for small-shop dust collection systems
AssigneeOneida Air Systems, Inc.
InventorsJoseph Baldwin, Jeffrey M. Hill, Robert M. Witter
Life of this patent
Estimating the term…
Abstract
Early alert and automatic shutdown system for dust producing and/or dust collecting tools senses for smoke or an overheat or spark condition in the dust-collection barrel and/or dust conveying conduit. When an upset condition is detected, fire, smoke or spark, the system signals the operator e.g. with a flasher or an audible alarm, or mechanical indicator. The system can also shut down the dust producing tool and/or the dust collector. The unit is based on a plug-and-play control box coupled with smoke and heat/spark sensors and with the system power.
Claims6
Fire protection, detection and alarm system in a woodshop or workshop in which a dust producing tool produces dust which may be flammable or combustible and which is produced by a dust producing tool and is conveyed via a conduit to a dust separator which separates out said dust and deposits it into a dust collection bin;
- the fire protection system comprising at least one of a thermal switch mounted on one or both of said dust collection bin and said dust conduit;
- and a smoke detector mounted at or hear said dust producing tool or said dust collection bin;
- a control box;
- one or both of a visible alarm flasher and an audible alarm sounder;
- said control box having circuitry including a connector receptacle for connecting with said at least one thermal switch and with said at least one smoke detector;
- and a relay arrangement that includes conductors for connecting with AC electrical power;
- a DC output providing direct current at a predetermined DC voltage;
- an input terminal for receiving a signal from one or both of said at least one smoke detector and said thermal switch;
- a normally open (NO) contact coupled to energize said visible alarm flasher and said audible alarm;
- a normally closed (NC) contact connected to a start mechanism for one or both of said dust collection bin and said dust producing tool to shut said dust producing tool OFF when an overheat or smoke condition is detected.
Dependencies are inferred from the claim text.