Patent US3775714A successfully refreshed from Google Patents.
US3775714A
Expired / Lapsed
US
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Electromagnetic drive for data indication
Assignee: Anker Werke AG
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Filing: 1971-07-06
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Granted: 1973-11-27
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Expires: 1991-07-06
Abstract
Abstract Electromagnetic drive for data indication includes a shell corelike magnet core, an excitation coil surrounding the magnet core, the magnet core having an inner sleeve-shaped core portion extending through the excitation coil, the inner core portion being formed with an air gap separating the inner core portion into two parts each formed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to the indicating means, the plunger being freely displaceably disposed within the sleeve-shaped inner core portion and being displaceable from a neutral position thereof to a position wherein the indicating means are effective to provide an indication.
Inventors
- 👤 H Heuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:13
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/27; B41J2/285; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/1615; H01F7/18; H01F7/121; H01F7/122
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
Electromagnetic drive for data indication comprising a shell core-like magnetic core, an excitation coil surrounding said magnet core, said magnet core having an inner sleeve-shaped core portion extending through said excitation coil, said inner core portion being formed with an air gap separating said inner core portion into two parts each formed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to said indicating means, said plunger being freely displaceably disposed within said sleeve-shaped inner core portion and being displaceable from a neutral position thereof to a position wherein said indicating means are effective to provide an indication.
Claim 2
Dependent Claim
105 words
Electromagnetic drive for data indication comprising a shell core-like magnetic core, an excitation coil surrounding said magnet core, said magnet core having an inner sleeve-shaped core portion extending through said excitation coil, said inner core portion being formed with an air gap separating said inner core portion into two parts each formed with a magnetic pole, indicating means, and a plunger polarized in longitudinal direction thereof operatively connected to said indicating means, said plunger being freely displaceably disposed within said sleeve-shaped inner core portion and being displaceable from a neutral position thereof to a position wherein said indicating means are effective to provide an indication.
Claim 3
Dependent Claim
37 words
Electromagnetic drive according to claim 1 wherein said sleeve-shaped inner core portion has a length that is a multiple of the length of said plunger, and said air gap is located in the center of said coil.
Claim 4
Dependent Claim
43 words
Electromagnetic drive according to claim 1 wherein said plunger, in neutral position thereof, is at least partly surrounded by one of said magnetic poles and, in said position thereof wherein said indicating means are effective, is surrounded by both of said magnetic poles.
Claim 5
Dependent Claim
47 words
Electromagnetic dRive according to claim 3 wherein the magnetic poles of said magnet core are polarizable, in one indicating operation, so that transfer of said plunger into both the positions thereof wherein said indicating means are effective, as well as into said neutral position thereof, is accelerated.
Claim 6
Dependent Claim
88 words
Electromagnetic drive according to claim 4 including means for producing an outer magnetic field in given direction in said plunger and means for producing with said excitation coil a magnetic field in direction opposite to said given direction for transferring said plunger from neutral position thereof to the position thereof wherein said indicating means are effective, and for producing a magnetic field in the same direction as said given direction for transferring said plunger from the position thereof wherein said indicating means effective to said neutral position thereof.
Claim 7
Dependent Claim
26 words
Electromagnetic drive according to claim 1 including adjustable stop means disposed in one of said sleeve-shaped core positions for adjusting the neutral position of said plunger.
Claim 8
Dependent Claim
16 words
Electromagnetic drive according to claim 6 wherein said stop means is formed with an air hole.
Claim 9
Dependent Claim
18 words
Electromagnetic drive according to claim 6 wherein said stop means is formed of a sound-proofing, elastic plastic material.
Claim 10
Dependent Claim
59 words
Electromagnetic drive according to claim 1 wherein said plunger comprises a member of tubular construction and a pair of guide flanges located respectively at opposite ends of said member, one of said guide flanges facing in direction toward said position of said plunger wherein said indicating means are effective, said one guide flange being connected to said indicating means.
Claim 11
Dependent Claim
14 words
Electromagnetic drive according to claim 9 wherein said indicating means has a wire-shaped construction.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |