US4400685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Emerson Electric Co
•
Filing: 1981-09-21
•
Granted: 1983-08-23
•
Expires: 2001-09-21
Abstract
Abstract An electrical contact arm is spring biased against electrical paths by a coil spring which is carried on a hub of a rotating member which also carries the electrical arm. An electrically conductive path is also carried by the rotating member to provide switching functions.
Inventors
- 👤 Benjamin F. Chestnut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/0213; H01C; H01C10/00; H01C10/30; H01C10/32; H01C10/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A combination of a switch and variable resistor comprising: (a) a housing, (b) at least four electrical terminals carried by said housing, (c) a resistance path and a collector path carried by said housing and individually electrically connected to two of said four electrical terminals, (d) a rotating member rotatably carried in said housing, (e) an electrical contact arm carried by said rotating member, (f) spring means carried by said rotating member and engaging said electrical contact arm to bias same against said resistance and collector paths, and (g) an electrically conductive path carried by said rotating member selectively engaging another two terminals of said four terminals to provide said switch.
Claim 2
Dependent Claim
111 words
A combination of a switch and variable resistor comprising: (a) a housing, (b) at least four electrical terminals carried by said housing, (c) a resistance path and a collector path carried by said housing and individually electrically connected to two of said four electrical terminals, (d) a rotating member rotatably carried in said housing, (e) an electrical contact arm carried by said rotating member, (f) spring means carried by said rotating member and engaging said electrical contact arm to bias same against said resistance and collector paths, and (g) an electrically conductive path carried by said rotating member selectively engaging another two terminals of said four terminals to provide said switch.
Claim 3
Dependent Claim
39 words
Combination according to claim 1 wherein said electrical contact arm includes a pair of fingers, one engaging said resistance path, the other said collector path, said spring means including separate springs one for each of said pair of fingers.
Claim 4
Dependent Claim
12 words
Combination according to claim 2 wherein said separate springs are coil springs.
Claim 5
Dependent Claim
23 words
Combination according to claim 3 further including an island carried by said rotating member and holes in said island receiving said coil springs.
Claim 6
Dependent Claim
33 words
Combination according to claim 1 wherein said resistance and collector paths are electrically connected to said electrical terminals by spring means carried by said electrical terminal and engaging said resistance and collector paths.
Claim 7
Dependent Claim
26 words
The combination according to claim 1 further including detent means carried by said electrically conductive path to locate same with respect to said another two terminals.
References Cited (Backward Citations)
SU238652A1
Cited
US506092A
Cited
US1574521A
Cited
US2632830A
Cited
US2784283A
Cited
US2798137A
Cited
US2855490A
Cited
US3072872A
Cited
US3312925A
Cited
US3375446A
Cited
US3349358A
Cited
US3588778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |