US3585561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restoring potentiometer for a servomotor
Assignee: Danfoss AS
•
Filing: 1969-07-15
•
Granted: 1971-06-15
•
Expires: 1989-07-15
Abstract
Abstract The invention relates to a restoring potentiometer for a servomotor having a movable output member. The resistor element of the potentiometer comprises a helical coil of spring wire and retaining means are provided for adjustably positioning one or both ends of the spring so that the full potentiometer resistance can be utilized for any size of working range. The retaining means can also be used to actuate a limit switch.
Inventors
- 👤 Kristian Iversen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A restoring potentiometer for a servomotor having a movable output member, comprising, a contact, a helical coil spring having relative movement with respect to said contact, and retaining means for adjusting the length of said spring to adjust the working range thereof.
Claim 2
Dependent Claim
42 words
A restoring potentiometer for a servomotor having a movable output member, comprising, a contact, a helical coil spring having relative movement with respect to said contact, and retaining means for adjusting the length of said spring to adjust the working range thereof.
Claim 3
Dependent Claim
32 words
A restoring potentiometer according to claim 1 including a limit switch, said retaining means comprising at least two members, at least one of said members being an actuating member for said switch.
Claim 4
Dependent Claim
20 words
A restoring potentiometer according to claim 2 wherein said retaining means and said spring are mounted on said movable member.
Claim 5
Dependent Claim
21 words
A restoring potentiometer according to claim 2 including a mounting member having a groove, said spring being disclosed in said groove.
Claim 6
Dependent Claim
34 words
A restoring potentiometer according to claim 4 wherein said movable output is rotatable, said mounting member having the form of a disc and said groove being concentric relative to the axis of said disc.
Claim 7
Dependent Claim
32 words
A restoring potentiometer according to claim 4 wherein said movable output has rectilinear movement, said mounting member having a rectangular form and a slot above said groove through which said contact passes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |