Suppressor-insulator member and circuit arrangement therefor

Details Suppressor-insulator member and circuit arrangement therefor Suppressor-insulator member and circuit arrangement therefor

1977-11-16

1979-12-11

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

307105, 310 72, 333 12, 361 23, 361111, H02H 102

Patent

active

041786173

ABSTRACT:
The invention is directed to a circuit arrangement and a suppressor-insulator member for suppressing noise in a portable hand-held electric-powered tool such as a double-insulated tool or the like while at the same time providing electrical insulation between voltage-carrying portion within the tool and an exposed part of the tool accessible to the operator of the tool. The suppressor-insulator member for conducting high-frequency noise from the voltage-carrying portion within the tool to the exposed metal part includes two connecting plates connectable to the voltage-carrying portion and the exposed-metal part respectively; and, a plate-like element of insulating material sandwiched between the connecting plates. The plate-like element has a predetermined thickness and extends outwardly beyond the periphery of the connecting plates so as to cause the element to define a creep-path between the connecting plates of sufficient length to electrically insulate the exposed-metal part from the voltage-carrying portion of the tool.

REFERENCES:
patent: 1955553 (1934-04-01), Labus
patent: 2008377 (1935-07-01), Whitaker
patent: 2027067 (1936-01-01), Schubert
patent: 2048096 (1936-07-01), Bisley
patent: 2114102 (1938-04-01), Collins
patent: 2928012 (1960-03-01), Hurst, Jr.
patent: 3353124 (1967-11-01), Dilger
patent: 3373301 (1968-03-01), Black

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