Fill tube alarm system

Details Fill tube alarm system Fill tube alarm system

1999-07-26

2000-08-15

Tong, Nina

Communications: electrical

Condition responsive indicating system

Specific condition

200 6109, G08B 2100

Patent

active

061043001

ABSTRACT:
An alarm system 10 for the fill tube 20 of an engine oil fill tube for heavy equipment to warn the operator of the equipment that an attempt has been made to sabotage the equipment by the introduction of metal particles 100 through the inlet end 22 of the engine oil fill tube 20. The alarm system 10 includes a non-metallic electrical contact member 42 having a magnetic tip 43 disposed proximate to the angled face 41 of a plate member 48 disposed within the fill tube 20. The accumulation of metal particles 100 on the plate member 40 will establish an electrical connection between the plate member and the magnetic tip 43 to activate one or more alarm members 50, 70.

REFERENCES:
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patent: 4205904 (1980-06-01), Skubich et al.
patent: 5118410 (1992-06-01), Rumberger
patent: 5174892 (1992-12-01), Davis
patent: 5196112 (1993-03-01), Eichman
patent: 5228990 (1993-07-01), Chiang
patent: 5384535 (1995-01-01), Mayeur
patent: 5402113 (1995-03-01), Naas
patent: 5476582 (1995-12-01), Camping
patent: 5742234 (1998-04-01), Owen
patent: 5811000 (1998-09-01), Schafer et al.

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