US3655906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp ballast and method of producing same
Assignee: General Electric Co
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Filing: 1970-10-19
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Granted: 1972-04-11
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Expires: 1990-10-19
Abstract
Abstract A lamp ballast wherein a magnetic core and coil assembly is encased within a housing and is spaced from the housing with a suitable filler material filling the space between the magnetic core and coil assembly and the housing. The magnetic core and coil assembly is suspended within the housing having an open top, being spaced from the sides and bottom thereof by suspension means. The housing or casing is then partially filled with the suitable filler material in liquid form, to a level wherein at least a portion of the magnetic core and coil assembly is immersed in the filler material. After the filler material has hardened to an extent that it will support the core and coil assembly, portions of the suspension means are removed such that when the housing is completely filled with the filler material the core and coil assembly will be completely surrounded by the filler material and the suspension means will not extend from the core and coil assembly to the casing. Thus, the suspension means does not provide a surface joining the casing and the core and coil assembly along which moisture entering the casing may reach the core and coil assembly.
Inventors
- 👤 Robert E Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; H01F41/00; H01F41/005; Y; Y10; Y10S; Y10S174/00; Y10S174/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: suspending by a temporary suspension means said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil is maintained in the spaced relationship; removing the suspending effect of said temporary suspension means, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 2
Independent Claim
121 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: suspending by a temporary suspension means said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil is maintained in the spaced relationship; removing the suspending effect of said temporary suspension means, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 3
Independent Claim
145 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: attaching temporary suspension means to said at least one magnetic core and coil assembly, suspending by engaging said temporary suspension means with said housing said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil assembly is maintained in the spaced relationship, removing at least that portion of said temporary suspension means which engages said housing, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 4
Independent Claim
145 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: attaching temporary suspension means to said at least one magnetic core and coil assembly, suspending by engaging said temporary suspension means with said housing said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil assembly is maintained in the spaced relationship, removing at least that portion of said temporary suspension means which engages said housing, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 5
Independent Claim
182 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: engaging said at least one magnetic core and coil assembly in the bight of at least one U-shaped support member which has a bight portion joining two leg portions and a hook portion formed at the free ends of said leg portions, suspending by engaging said hook portions of said at least one U-shaped support member with said housing, said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil assembly is maintained in the spaced relationship, severing and removing at least said hook portions of said at least one U-shaped support member, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 6
Independent Claim
182 words
A method of producing a lamp ballast having at least one magnetic core and coil assembly which is encased in a housing, said method comprising the steps of: engaging said at least one magnetic core and coil assembly in the bight of at least one U-shaped support member which has a bight portion joining two leg portions and a hook portion formed at the free ends of said leg portions, suspending by engaging said hook portions of said at least one U-shaped support member with said housing, said at least one magnetic core and coil assembly in said housing in a spaced relationship such that said at least one magnetic core and coil assembly does not contact said housing, partially filling said housing with a liquid filler material to a level such that upon hardening said magnetic core and coil assembly is maintained in the spaced relationship, severing and removing at least said hook portions of said at least one U-shaped support member, completely filling said housing with said filler material to completely encase said core and coil assembly in said housing.
Claim 7
Dependent Claim
116 words
A lamp ballast having at least one magnetic core and coil assembly, a housing, and a hardenable filler material encasing said at least one magnetic core and coil assembly; formed by: suspending said at least one magnetic core and coil assembly in said housing in spaced relationship thereto by engaging said at least one magnetic core and coil assembly and said housing with temporary suspension means; partially filling said housing with said filler material to a level sufficient to support said at least one magnetic core and coil assembly in spaced relationship within said housing; removing said temporary suspension means from engagement with said housing; and substantially completely filling said housing with said hardenable filler material.
Claim 8
Dependent Claim
116 words
A lamp ballast having at least one magnetic core and coil assembly, a housing, and a hardenable filler material encasing said at least one magnetic core and coil assembly; formed by: suspending said at least one magnetic core and coil assembly in said housing in spaced relationship thereto by engaging said at least one magnetic core and coil assembly and said housing with temporary suspension means; partially filling said housing with said filler material to a level sufficient to support said at least one magnetic core and coil assembly in spaced relationship within said housing; removing said temporary suspension means from engagement with said housing; and substantially completely filling said housing with said hardenable filler material.
References Cited (Backward Citations)
US3173059A
Cited
US3360687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |