US4005380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clip-on inductive pulse pick-up
Assignee: Robert Bosch GmbH
•
Filing: 1976-05-19
•
Granted: 1977-01-25
•
Expires: 1996-05-19
Abstract
Abstract The halves of a ferrite core respectively set in the jaws of a pick-up clip are held in plastic holders loosely mounted in the respective clip jaws with compression springs between the holders and the jaws that are weaker than the spring that pulls the clip jaws together. This arrangement enables the core halves to accommodate to each other to produce a flush fit and reduces the impact on closing the clip which the main spring would otherwise produce. A conducting coating is provided for electrical shielding against stray fields.
Inventors
- 👤 Wolfgang Heilmann
- 👤 Kurt Groetzner
- 👤 Bernhard Frohnwieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/20; G01R1/22; F; F02; F02P; F02P17/00; F02P17/02; F02P17/04; F02P2017/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A clip-on inductive pulse detector for detecting current pulses in an electric conductor and generating a trigger pulse in response thereto, comprising a pair of clip jaw shells provided with clip-opening handles, a hinge, a first spring arranged to move the jaw shells together, a ferrite core in two separate halves mounted respectively in recesses in said respective jaw shells, said core halves being shaped so as to fit together and to surround an electric conductor when said jaw shells are closed thereover, and a winding provided on said ferrite core having leads for connection to an electrical circuit, and also comprising the improvement wherein: at least one of said core halves (18, 19) is mounted with a compression spring (24 and/or 25) held between it and the jaw shell in which it is mounted and is movable against said compression spring by the force of said first spring (12) when the jaw shells (10, 11) are closed together.
Claim 2
Dependent Claim
159 words
A clip-on inductive pulse detector for detecting current pulses in an electric conductor and generating a trigger pulse in response thereto, comprising a pair of clip jaw shells provided with clip-opening handles, a hinge, a first spring arranged to move the jaw shells together, a ferrite core in two separate halves mounted respectively in recesses in said respective jaw shells, said core halves being shaped so as to fit together and to surround an electric conductor when said jaw shells are closed thereover, and a winding provided on said ferrite core having leads for connection to an electrical circuit, and also comprising the improvement wherein: at least one of said core halves (18, 19) is mounted with a compression spring (24 and/or 25) held between it and the jaw shell in which it is mounted and is movable against said compression spring by the force of said first spring (12) when the jaw shells (10, 11) are closed together.
Claim 3
Dependent Claim
68 words
A clip-on inductive pulse detector as defined in claim 1, in which said core half or halves mounted movably against a compression spring is set in a holder (20, 21) made of synthetic material that is loosely held in a cavity (23) in the corresponding jaw shell with the assistance of stop means (22) for preventing said compression spring from expelling the holder from the corresponding jaw shell.
Claim 4
Dependent Claim
33 words
A clip-on inductive pulse detector as defined in claim 2, in which said holder or holders (20, 21) are at least partly provided with an electrically conducting coating for shielding against electrical disturbances.
Claim 5
Dependent Claim
43 words
A clip-on inductive pulse detector as defined in claim 2, in which said core halves, the winding 17 of said core and the leads thereof and the holder or holders and jaw shells surrounding them are all provided with an electrically conducting coating.
Claim 6
Dependent Claim
31 words
A clip-on inductive pulse detector as defined in claim 4, in which said electrically conducting coatings are connected to a shield provided on the leads to said winding of said core.
References Cited (Backward Citations)
GB327837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |