发明申请
- 专利标题: Electrical circuit
- 专利标题(中): 电路
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申请号: US12798928申请日: 2010-04-14
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公开(公告)号: US20110253695A1公开(公告)日: 2011-10-20
- 发明人: Thomas Graham
- 申请人: Thomas Graham
- 主分类号: H05B1/00
- IPC分类号: H05B1/00
摘要:
An indicating lamp is provided on the exterior of a vent port to indicate failure of a heater within the vent port. An electrical circuit is provided to energize the indicating lamp in response to failure of one or the other of a pair of heaters within the vent port.
公开/授权文献
- US08309889B2 Electrical circuit 公开/授权日:2012-11-13
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