Patent US3731016A successfully refreshed from Google Patents.
US3731016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch with arc-prevention grooves between plate supported contacts
Assignee: Panasonic Holdings Corp
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Filing: 1971-06-14
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Granted: 1973-05-01
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Expires: 1991-06-14
Abstract
Abstract A variable resistor-switch having a plurality of pairs of contacts wherein a plurality of grooves are formed in order to increase the surface insulation length, thereby improving the insulating effect to higher rated voltages.
Inventors
- 👤 T Nadaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:47
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/32; H01C10/36; H01H; H01H9/00; H01H9/30; H01H9/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that grooves are formed in said switch plate and between said contacts, said contacts being fixed to said switch plate with electrical arcs being generated between said contacts when the switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of the arcs when the switch contacts are opened or closed.
Claim 2
Dependent Claim
99 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that grooves are formed in said switch plate and between said contacts, said contacts being fixed to said switch plate with electrical arcs being generated between said contacts when the switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of the arcs when the switch contacts are opened or closed.
Claim 3
Dependent Claim
98 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that grooves are formed between said contacts, said contacts being fixed to said switch plate and said switch cover with electrical arcs being generated between said contacts when the switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of the arcs when the switch contacts are opened or closed.
Claim 4
Dependent Claim
98 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that grooves are formed between said contacts, said contacts being fixed to said switch plate and said switch cover with electrical arcs being generated between said contacts when the switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of the arcs when the switch contacts are opened or closed.
Claim 5
Dependent Claim
130 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that first grooves are formed between said contacts, said contacts being fixed to said switch plate, and second grooves are formed between said contacts and said switch cover with electrical arcs being generated between said contacts when the switch contacts are opened and closed and further electrical arcs are generated between the contacts and switch cover when the switch contacts are opened and closed, said arcs having a directional orientation, said first and second grooves having sufficient depth respectively to be free from the direction of the arcs formed when the switch contacts are opened and closed.
Claim 6
Dependent Claim
130 words
A variable resistor-switch of the type having a switch unit including contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch characterized in that first grooves are formed between said contacts, said contacts being fixed to said switch plate, and second grooves are formed between said contacts and said switch cover with electrical arcs being generated between said contacts when the switch contacts are opened and closed and further electrical arcs are generated between the contacts and switch cover when the switch contacts are opened and closed, said arcs having a directional orientation, said first and second grooves having sufficient depth respectively to be free from the direction of the arcs formed when the switch contacts are opened and closed.
Claim 7
Dependent Claim
138 words
A variable resistor-switch of the type having a switch unit including a plurality of pairs of contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch, characterized in that grooves are formed in said switch plate between said plurality of pairs of contacts fixed thereto and between said plurality of pairs of contacts and said switch cover, with electrical arcs being generateD between said contacts when the switch contacts are opened and closed and further electrical arcs being generated between said plurality of pairs of contacts and said switch cover when said switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of arcs formed when the switch contacts are opened or closed.
Claim 8
Dependent Claim
138 words
A variable resistor-switch of the type having a switch unit including a plurality of pairs of contacts, a switch plate, a switch portion operatively associated with said switch plate and a switch cover covering said switch, characterized in that grooves are formed in said switch plate between said plurality of pairs of contacts fixed thereto and between said plurality of pairs of contacts and said switch cover, with electrical arcs being generateD between said contacts when the switch contacts are opened and closed and further electrical arcs being generated between said plurality of pairs of contacts and said switch cover when said switch contacts are opened and closed, said arcs having a directional orientation, said grooves having a sufficient depth respectively to be free from the direction of arcs formed when the switch contacts are opened or closed.
References Cited (Backward Citations)
US2908777A
Cited
US3024334A
Cited
US3031552A
Cited
US3135840A
Cited
US3140364A
Cited
US3472975A
Cited
US3462564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |