US3646401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherproof unpotted ballast construction
Assignee: Advance Transformer Co
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Filing: 1971-01-29
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Granted: 1972-02-29
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Expires: 1991-01-29
Abstract
Abstract A ballast for gaseous discharge devices especially intended for connection to outdoor mercury lamps which is constructed to run cool and to be weatherproof. A transformer and condenser are mounted as a unit within a housing on an integral base of high heat conductivity metal and separated together from the canister or housing by airspace, and likewise separated from one another by airspace and a heat barrier. The ballast is unpotted and transfers heat to the housing wall by convection and radiation and to the base by condition, the transformer being in contact with the base. The housing is mounted on the base with an elastomer gasket between the housing and the base. The leads from the ballast are led to a nipple through wire-carrying channels integrally formed in the base. The nipple is also integral with the base and the leads emerge from the ballast by way of a frustoconical elastomer plug compressed within the nipple.
Inventors
- 👤 Ernest M Freegard
- 👤 Sol Hasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:23
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/26; H01F27/266; H01F27/08; H01F27/085; H01F27/40; Y; Y10; Y10S; Y10S174/00; Y10S174/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
159 words
A power supply apparatus for lamps to be used outdoors which comprises: A. a power unit including at least a heat-producing component, B. a unitary base of heat-conducting material, the power unit being mounted on the base with the heat-producing component in heat-transfer engagement with the base, C. a one-piece canister of thin-walled heat-conducting material formed as a cylinder having one end closed and the other end open, D. the open end of the canister being engaged upon the said base in a weatherproof joint and enclosing the power unit, E. an integral, hollow, exterior nipple formed on the base and adapted to be engaged through an opening formed in a mounting bracket adapted to support the apparatus, and F. the power unit having a plurality of electrical leads and the leads extending from the interior of the apparatus to the exterior thereof by way of the hollow of the nipple and being disposed therein in waterproof association therewith.
Claim 2
Dependent Claim
159 words
A power supply apparatus for lamps to be used outdoors which comprises: A. a power unit including at least a heat-producing component, B. a unitary base of heat-conducting material, the power unit being mounted on the base with the heat-producing component in heat-transfer engagement with the base, C. a one-piece canister of thin-walled heat-conducting material formed as a cylinder having one end closed and the other end open, D. the open end of the canister being engaged upon the said base in a weatherproof joint and enclosing the power unit, E. an integral, hollow, exterior nipple formed on the base and adapted to be engaged through an opening formed in a mounting bracket adapted to support the apparatus, and F. the power unit having a plurality of electrical leads and the leads extending from the interior of the apparatus to the exterior thereof by way of the hollow of the nipple and being disposed therein in waterproof association therewith.
Claim 3
Dependent Claim
32 words
The power supply apparatus as claimed in claim 1 in which there is an air space within the power supply apparatus between the power unit and the interior of the canister wall.
Claim 4
Dependent Claim
41 words
The power supply apparatus as claimed in claim 1 in which there is an elastomeric plug compressed in the hollow of the nipple and the electrical leads pass through passageways formed in said plug and are tightly engaged in said passageways.
Claim 5
Dependent Claim
30 words
The power supply apparatus as claimed in claim 3 in which the elastomeric plug is frustoconical and is wedged into said hollow from the interior of the power supply apparatus.
Claim 6
Dependent Claim
36 words
The power supply apparatus as claimed in claim 4 in which the hollow is tapered to receive the plug and has a shoulder at its end to limit the movement of the plug into the hollow.
Claim 7
Dependent Claim
69 words
The power supply apparatus as claimed in claim 1 in which the nipple is formed in the center of the base and the heat-producing component has one edge thereof engaged upon said base over said nipple and in which said base has channel means integrally formed therein to convey said leads from the interior of tHe power supply to the hollow of the nipple beneath said heat-producing component edge.
Claim 8
Dependent Claim
53 words
The power supply apparatus as claimed in claim 1 in which the base is circular and the open end of the canister includes an annular flange engaged to the upper surface of the base around the periphery thereof and in which there is an elastomeric gasket clamped between the flange and said base.
Claim 9
Dependent Claim
51 words
The power supply apparatus as claimed in claim 2 in which the power unit includes a condenser in addition to said heat-producing component, a framework providing spacing between the condenser and the heat-producing component and a heat barrier is provided between the condenser and heat-producing component in addition to said spacing.
Claim 10
Dependent Claim
40 words
The power supply apparatus as claimed in claim 8 in which said framework includes a channel-shaped yoke having its open end closed off by said barrier and forming a boxlike space, said condensers being frictionally engaged within said boxlike space.
Claim 11
Dependent Claim
53 words
The power supply apparatus as claimed in claim 8 in which the base is circular and the open end of the canister includes an annular flange engaged to the upper surface of the base around the periphery thereof and in which there is an elastomeric gasket clamped between the flange and said base.
Claim 12
Dependent Claim
17 words
The power supply apparatus as claimed in claim 1 in which the heat-producing component is a transformer.
Claim 13
Dependent Claim
17 words
The power supply apparatus as claimed in claim 8 in which said heat-producing component is a transformer.
Claim 14
Dependent Claim
92 words
In a weatherproof power supply apparatus construction which includes a base, a power unit mounted on the base and a canister also mounted on the base and enclosing the power unit, means for leading electrical leads from the interior of the apparatus to the exterior thereof, comprising: an integral externally protruding hollow nipple on said base, an elastomeric plug wedged into the bore of said nipple from the interior of the ballast, passageways formed in the plug and the leads being tightly engaged in said passageway by reason of said wedging engagement.
Claim 15
Dependent Claim
92 words
In a weatherproof power supply apparatus construction which includes a base, a power unit mounted on the base and a canister also mounted on the base and enclosing the power unit, means for leading electrical leads from the interior of the apparatus to the exterior thereof, comprising: an integral externally protruding hollow nipple on said base, an elastomeric plug wedged into the bore of said nipple from the interior of the ballast, passageways formed in the plug and the leads being tightly engaged in said passageway by reason of said wedging engagement.
Claim 16
Dependent Claim
29 words
The structure as claimed in claim 13 in which the bore is tapered with the smaller diameter furthest from the interior of the ballast and the plug is frustoconical.
Claim 17
Dependent Claim
35 words
The structure as claimed in claim 14 in which the end of the nipple has an interior shoulder to limit the extent of movement of the plug therein while same is being wedged in place.
Claim 18
Dependent Claim
110 words
In a ballast construction which includes a condenser and a transformer and in which there is a framework holding the condenser and transformer assembled together as a unit, means for insulating the condenser from heat generated in the transformer comprising: the framework including a channel-shaped yoke opening toward the transformer, support members for connecting the yoke to the transformer, a pair of angled legs on the yoke attached to said support members and a heat barrier disposed between the angled legs and the support members and closing off the opening of the yoke to provide with the yoke a boxlike formation, and the condenser being disposed within the boxlike formation.
Claim 19
Dependent Claim
110 words
In a ballast construction which includes a condenser and a transformer and in which there is a framework holding the condenser and transformer assembled together as a unit, means for insulating the condenser from heat generated in the transformer comprising: the framework including a channel-shaped yoke opening toward the transformer, support members for connecting the yoke to the transformer, a pair of angled legs on the yoke attached to said support members and a heat barrier disposed between the angled legs and the support members and closing off the opening of the yoke to provide with the yoke a boxlike formation, and the condenser being disposed within the boxlike formation.
Claim 20
Dependent Claim
20 words
The structure as claimed in claim 16 in which the heat barrier comprises a sheet member of heat-resistant insulating material.
Claim 21
Dependent Claim
14 words
The structure as claimed in claim 16 in which the heat barrier is fiber.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |