Electric safety supply apparatus and connector device combinatio

Details Electric safety supply apparatus and connector device combinatio Electric safety supply apparatus and connector device combinatio

1987-12-30

1989-03-21

Hix, L. T.

Electrical transmission or interconnection systems

Personnel safety or limit control features

307131, 340650, 340652, 361 50, H02H 314, H02H 102, H02H 316

Patent

active

048146412

ABSTRACT:
In an electrical appliance having an electrically conducting housing, defective grounding of the housing may result in a dangerous situation for the user. To prevent such a dangerous situation, the appliance, also having an internal, load circuit, is provided with a safety connector device, which connector device comprises an electric plug having two power contacts through which the load circuit is energized, and two auxiliary contacts. The two latter, auxiliary contacts are respectively connected to two separate points of the housing so that they are interconnected together through an interconnecting circuit including the electrically conducting housing of the appliance. One of the two auxiliary contacts is connectable to a ground for grounding the housing whereby a disconnection of the ground from the housing can be detected by sensing a discontinuity in the interconnecting circuit.

REFERENCES:
patent: 3618065 (1971-11-01), Trip et al.
patent: 3766434 (1973-10-01), Sherman
patent: 3783340 (1974-01-01), Becker
patent: 4011483 (1977-03-01), Meadows
patent: 4093336 (1978-06-01), Rose
patent: 4148536 (1979-04-01), Petropoulsos et al.
patent: 4152557 (1979-05-01), Busch et al.
patent: 4346419 (1982-08-01), Janniello

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