US3602815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moving-coil instrument having a housing with openings for insertion or withdrawal of the core and coil
Assignee: Agfa Gevaert AG
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Filing: 1969-05-08
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Granted: 1971-08-31
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Expires: 1989-05-08
Abstract
Abstract The housing of a electrical measuring instrument has two openings located opposite each other in a cylindrical wall of the housing and respectively permitting insertion or withdrawal of a moving-coil assembly and a core magnet in such a way that the magnet can be inserted or withdrawn through one opening and an open side of the moving coil assembly and that the moving coil assembly can be inserted or withdrawn through the other opening independently of the core magnet. The magnet is mounted on the arm of an insulating holder which is separably secured to the housing by a screw and carries an electric terminal as well as a retainer for the return spring which biases the moving coil assembly to zero position.
Inventors
- 👤 Fritz Rumpelein
- 👤 Paul Kopf
- 👤 Franz Landbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:26
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/02; G01R5/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
109 words
In an electrical instrument, a combination comprising a hollow housing having an opening; a hollow moving coil assembly turnably mounted in said housing substantially surrounded by the same and having an open side movable into at least partial registry with said opening; and an insert including a core magnet received in said moving coil assembly and a holder separably secured to said housing and having a portion extending through said opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing while said moving coil assembly remains turnably mounted in said housing.
Claim 2
Dependent Claim
109 words
In an electrical instrument, a combination comprising a hollow housing having an opening; a hollow moving coil assembly turnably mounted in said housing substantially surrounded by the same and having an open side movable into at least partial registry with said opening; and an insert including a core magnet received in said moving coil assembly and a holder separably secured to said housing and having a portion extending through said opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing while said moving coil assembly remains turnably mounted in said housing.
Claim 3
Dependent Claim
25 words
A combination as defined in claim 1, wherein said housing has a substantially cylindrical wall and wherein said opening is provided in said cylindrical wall.
Claim 4
Dependent Claim
32 words
A combination as defined in claim 1, wherein said holder and said housing are provided with abutting locating surfaces for holding said magnet in a predetermined position with reference to said housing.
Claim 5
Dependent Claim
32 words
A combination as defined in claim 3, wherein the surfaces of said housing include at least one surface which flanks said opening and a portion of the external surface of said housing.
Claim 6
Dependent Claim
19 words
A combination as defined in claim 1, further comprising threaded fastener means separably securing said holder to said housing.
Claim 7
Dependent Claim
18 words
A combination as defined in claim 1, wherein said housing constitutes the feedback element of the moving-coil instrument.
Claim 8
Dependent Claim
52 words
A combInation as defined in claim 1, wherein said housing comprises a substantially cylindrical first wall and two end walls extending transversely across the ends of said first wall, said end walls being provided with bearing means supporting said moving coil assembly for oscillatory movement about the axis of said first wall.
Claim 9
Dependent Claim
107 words
In an electrical instrument, a combination comprising a hollow housing having an opening; a hollow moving coil assembly turnably mounted in said housing and having an open side movable into at least partial registry with said opening; an insert including a core magnet received in said moving coil assembly, and a holder consisting of electrically insulating material and separably secured to said housing, said holder having a portion extending through said opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing; and electric terminal means provided on said holder.
Claim 10
Dependent Claim
107 words
In an electrical instrument, a combination comprising a hollow housing having an opening; a hollow moving coil assembly turnably mounted in said housing and having an open side movable into at least partial registry with said opening; an insert including a core magnet received in said moving coil assembly, and a holder consisting of electrically insulating material and separably secured to said housing, said holder having a portion extending through said opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing; and electric terminal means provided on said holder.
Claim 11
Dependent Claim
17 words
A combination as defined in claim 8, further comprising spring retainer means provided on said terminal means.
Claim 12
Dependent Claim
125 words
In an electrical instrument, a combination comprising a hollow housing having a first opening; a hollow moving coil assembly turnably mounted in said housing and having an open side movable into at least partial registry with said first opening; and an insert including a core magnet received in said moving coil assembly and a holder separably secured to said housing and having a portion extending through said first opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing and said housing having a second opening by means of which said moving coil assembly can be withdrawn from said housing while said insert remains secured to said housing.
Claim 13
Dependent Claim
125 words
In an electrical instrument, a combination comprising a hollow housing having a first opening; a hollow moving coil assembly turnably mounted in said housing and having an open side movable into at least partial registry with said first opening; and an insert including a core magnet received in said moving coil assembly and a holder separably secured to said housing and having a portion extending through said first opening and supportingly connected with said magnet, said magnet being withdrawable by way of said open side and said opening upon separation of said holder from said housing and said housing having a second opening by means of which said moving coil assembly can be withdrawn from said housing while said insert remains secured to said housing.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |