Patent US4337508A successfully refreshed from Google Patents.
US4337508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High wattage lamp fixture
Assignee: MOFFATT PRODUCTS Inc
•
Filing: 1980-07-31
•
Granted: 1982-06-29
•
Expires: 2000-07-31
Abstract
Abstract An incandescent lamp fixture includes an incandescent lamp screwed into a plastic lamp socket, a metallic heat dissipater in intimate heat transfer contact with the socket and having heat dissipating fins extending out from the socket. A metallic reflector surrounds the lamp and is mounted on the dissipater in heat transfer contact with it. An open-ended cylindrical lamp shade is connected to the heat dissipater and is in spaced, concentric relation to the dissipater, socket and lamp to permit free flow of air heated by the fixture to pass between the outside of the reflector and through the fins of the dissipater on the one side and the interior of the shade on the other. This will keep the temperature of the lamp base below the breakdown temperature of the socket and switch and below the breakdown temperature of the cement between the lamp base and the lamp bulb. A switch assembly includes a switch base mounted to the lamp socket and incoming power wires mounted directly on the switch base. A switch toggle and a moving switch contact controlled by the toggle are also directly mounted on the switch base.
Inventors
- 👤 David A. Moffatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:39
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/74; F21S; F21S6/00; F21S6/002; F21S6/003; F21V23/00; F21V23/04; F21V29/75; F21V29/77; F21V29/773
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
236 words
For use with a source of electrical energy and an incandescent lamp having a metallic base, a translucent bulb and a metallic center terminal, an incandescent lamp fixture including: A. a lamp socket of non-electrically conductive material of configuration to receive and retain a metallic lamp base; B. a first electrical contact in said socket in position to contact said lamp base; C. a second electrical contact in said socket in position to contact a center terminal of said lamp; D. electrical circuit means to transmit energy to said first and second electrical contacts; E. a heat dissipater of material highly conductive to heat in intimate surrounding continuous contact with an outer surface of said socket over an area at least equivalent and opposite an inner surface facing and contacting said lamp base, said heat dissipater having heat dissipating fins extending radially outwardly from the lamp socket; F. an open-ended lamp shade fixedly mounted with respect to said dissipater in concentric spaced relation with respect to said socket, said shade encompassing said electrical circuit means, said socket and said heat dissipater and extending past said socket sufficiently to encompass an incandescent lamp when mounted in said socket; and G. a reflector of material highly conductive to heat and mounted in surrounding relation to said socket in intimate heat conductive relation to said dissipater and in concentric but spaced relation from and inside of said lamp shade.
Claim 2
Dependent Claim
236 words
For use with a source of electrical energy and an incandescent lamp having a metallic base, a translucent bulb and a metallic center terminal, an incandescent lamp fixture including: A. a lamp socket of non-electrically conductive material of configuration to receive and retain a metallic lamp base; B. a first electrical contact in said socket in position to contact said lamp base; C. a second electrical contact in said socket in position to contact a center terminal of said lamp; D. electrical circuit means to transmit energy to said first and second electrical contacts; E. a heat dissipater of material highly conductive to heat in intimate surrounding continuous contact with an outer surface of said socket over an area at least equivalent and opposite an inner surface facing and contacting said lamp base, said heat dissipater having heat dissipating fins extending radially outwardly from the lamp socket; F. an open-ended lamp shade fixedly mounted with respect to said dissipater in concentric spaced relation with respect to said socket, said shade encompassing said electrical circuit means, said socket and said heat dissipater and extending past said socket sufficiently to encompass an incandescent lamp when mounted in said socket; and G. a reflector of material highly conductive to heat and mounted in surrounding relation to said socket in intimate heat conductive relation to said dissipater and in concentric but spaced relation from and inside of said lamp shade.
Claim 3
Dependent Claim
25 words
The lamp fixture of claim 1 wherein: H. said lamp shade also being in spaced relation with respect to said fins of said heat dissipater.
Claim 4
Dependent Claim
133 words
The lamp fixture of claim 2 wherein: I. said electrical circuit means including: (1) a switch base of electrically non-conductive material supported in intimate heat transfer relation to the heat dissipater and lying across the closed end of the socket, (2) first and second switch terminals fixed on said switch base, each of said terminals being electrically connected to one of said first and second electrical contacts, (3) first and second energized electrical wires extending from a source of electrical energy through said shade and each terminating at one of said first and second terminals, and (4) switch means mounted on said switch base, said switch means being manually operable to selectively make and break the continuity of the electrical connection between at least one of said electrical contacts and its associated terminal.
Claim 5
Dependent Claim
205 words
The lamp fixture of claim 3 wherein: J. said switch means includes: (1) a contact arm pivotally mounted in spaced relation to said switch base on a first axis, (2) a switch toggle pivotally mounted in spaced relation to said switch base on said first axis, (3) an electrically conductive hammer on said switch contact arm, (4) resilient means urging said contact arm to move said hammer in direction toward said switch plate responsive to positioning of said switch toggle in a first position, and urging said contact arm and hammer in a direction away from said switch plate responsive to positioning of said switch toggle in a second position, (5) one of said first and second electrical contacts having a first hammer contact surface situated on said switch base in position to be contacted by said hammer when it is being urged toward said switch plate, and (6) one of said first and second terminals having a second hammer contact surface situated on said switch base adjacent but electrically isolated from said first hammer contact surface in position to be contacted by said hammer to complete an electrical connection to said first hammer surface when the hammer is being urged toward the switch plate.
Claim 6
Dependent Claim
100 words
The lamp fixture of claim 4 wherein: K. a hollow switch cap is integrally connected in concentric relation to said lamp shade by a plurality of arms extending between the shade and cap; L. said lamp shade is fixedly mounted with respect to the heat dissipater through the instrumentality of ears on the cap being fastened directly to the heat dissipater; and M. said switch cap is of configuration to retain said switch means in protected operable condition, and is provided with an opening in position to receive and to make accessible a manually operable portion of said switch toggle.
References Cited (Backward Citations)
US3388249A
Cited
US3626424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |