Patent US3300748A successfully refreshed from Google Patents.
US3300748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary thumbwheel voltage divider switch
Assignee: EECO Inc
•
Filing: 1964-03-04
•
Granted: 1967-01-24
•
Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Gabrielian Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:14
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/001; H01C; H01C10/00; H01C10/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN ADJUSTABLE VOLTAGE DIVIDER COMPRISING (A) A MULTIPOSITION THUMBWHEEL ROTARY SWITCH HAVING PLURAL STATIONARY CONTACT TRACKS WITH EACH OF SAID TRACKS HAVING ONE ROTARY WIPER AND (B) AN ADDITIONAL TRACK HAVING PLURAL STATIONARY CONTACTS, AND TWO CIRCUMFERENTIALLY SPACED ROTARY WIPERS, (C) A FIRST GROUP OF SERIES CONNECTED RESISTORS WHICH ARE CONNECTED TO A FIRST GROUP OF SAID STATIONARY CONTACTS, AND (D) A SECOND GROUP OF SERIES CONNECTED RESISTORS WHICH ARE CONNECTED TO A SECOND GROUP OF SAID STATIONARY CONTACTS AND IN SERIES WITH SAID FIRST GROUP OF RESISTORS, (E) MEANS TO ROTATE ALL OF SAID ROTARY WIPERS IN COMMON,
Claim 2
Dependent Claim
99 words
AN ADJUSTABLE VOLTAGE DIVIDER COMPRISING (A) A MULTIPOSITION THUMBWHEEL ROTARY SWITCH HAVING PLURAL STATIONARY CONTACT TRACKS WITH EACH OF SAID TRACKS HAVING ONE ROTARY WIPER AND (B) AN ADDITIONAL TRACK HAVING PLURAL STATIONARY CONTACTS, AND TWO CIRCUMFERENTIALLY SPACED ROTARY WIPERS, (C) A FIRST GROUP OF SERIES CONNECTED RESISTORS WHICH ARE CONNECTED TO A FIRST GROUP OF SAID STATIONARY CONTACTS, AND (D) A SECOND GROUP OF SERIES CONNECTED RESISTORS WHICH ARE CONNECTED TO A SECOND GROUP OF SAID STATIONARY CONTACTS AND IN SERIES WITH SAID FIRST GROUP OF RESISTORS, (E) MEANS TO ROTATE ALL OF SAID ROTARY WIPERS IN COMMON,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |