Patent US3689761A successfully refreshed from Google Patents.
US3689761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental operating light
Assignee: Individual
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Filing: 1970-10-07
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Granted: 1972-09-05
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Expires: 1990-10-07
Abstract
Abstract A lamp primarily for use as a dental operating lamp which comprises an annular frame which is connected to an arm for mounting the lamp on a support, a light source and lens system mounted on the annular frame with the optical axis of the lens system generally aligned with the axis of the frame and a plurality of annular convection fins removably mounted on both sides of the frame in spaced relationship to one another so as to surround the light source and lens system while allowing an uninterrupted passage for convection currents in substantially all radial directions around the light source. The convection fins are preferably dished so as to form a shade for the light source without impeding the air flow and the lamp is preferably mounted on a support comprising a tubular arm which is adapted to form a continuous conduit for a flexible cable and which includes two joints along the lamp to be rotated through at least 330* about each of two mutually perpendicular axes which axes are preferably both perpendicular to and pass through the optical axis of the lamp.
Inventors
- 👤 Cyril Rosen
- 👤 Stan Patok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:48
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/74; A; A61; A61C; A61C19/00; F21V11/00; F21V11/06; F21V21/00; F21V21/14; F21V21/26; F21V21/28; F21V21/29; F21V29/71; F21V29/713; F21V14/00; F21V14/06; F21W; F21W2131/00; F21W2131/20; F21W2131/202
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
156 words
A lamp for use as an operating lamp, comprising an annular frame, a support, means for mounting the frame of the lamp on said support, a light source and lens system mounted on the annular frame with the optical axis of the lens system generally aligned with the axis of the frame, a plurality of annular convection fins removably mounted on the frame in spaced relationship so as to surround the light source and allow an uninterrupted passage for convection currents in substantially all radial directions from the light source, wherein the convection fins are dished so as to form a shade for the light source without impeding the air flow around the light source, wherein a plurality of longitudinal members project from each side of the frame in parallel with the axis of the frame and a plurality of the said convection fins are removably mounted on the members on each side of the frame.
Claim 2
Dependent Claim
156 words
A lamp for use as an operating lamp, comprising an annular frame, a support, means for mounting the frame of the lamp on said support, a light source and lens system mounted on the annular frame with the optical axis of the lens system generally aligned with the axis of the frame, a plurality of annular convection fins removably mounted on the frame in spaced relationship so as to surround the light source and allow an uninterrupted passage for convection currents in substantially all radial directions from the light source, wherein the convection fins are dished so as to form a shade for the light source without impeding the air flow around the light source, wherein a plurality of longitudinal members project from each side of the frame in parallel with the axis of the frame and a plurality of the said convection fins are removably mounted on the members on each side of the frame.
Claim 3
Dependent Claim
46 words
A lamp as claimed in claim 1, wherein the convection fins on each side of the annular frame are mounted on the longitudinal members so as to be removable as a single unit to give easy access to the front or rear of the lamp respectively.
Claim 4
Dependent Claim
54 words
A lamp as claimed in claim 2, wherein the longitudinal members comprise rods extending through the annular frame so as to project from each side thereof, a sleeve is slidably mounted on each end of each rod and the convection fins are mounted on the sleeves so as to be removable with the sleeves.
Claim 5
Dependent Claim
25 words
A lamp as claimed in claim 3, wherein each convection fin comprises a substantially flat annular base and a dished annular flange projecting outwardly therefrom.
Claim 6
Dependent Claim
32 words
A lamp as claimed in claim 4, wherein the base of each convection fin is formed with a plurality of first apertures to receive the sleeves on which each fin is mounted.
Claim 7
Dependent Claim
28 words
A lamp as claimed in claim 5, wherein the rear cone has a base formed with a plurality of second apertures for the passages of convection currents therethrough.
Claim 8
Dependent Claim
21 words
A lamp as claimed in claim 6 wherein the convection fins are separated by tubular spacers slidably mounted on the sleeves.
Claim 9
Dependent Claim
21 words
A lamp as claimed in claim 7, wherein three angularly spaced longitudinal members project from each side of the annular frame.
Claim 10
Dependent Claim
47 words
A lamp as claimed in claim 1, wherein said means for mounting the lamp on said support comprises a tubular arm forming a continuous conduit and includes two joints allowing the lamp to be rotated through at least 330* about each of the two mutually perpendicular axes.
Claim 11
Dependent Claim
26 words
A lamp as claimed in claim 9, wherein the said mutually perpendicular axes are both perpendicular to and pass through the optical axis of the lamp.
Claim 12
Dependent Claim
49 words
A lamp as claimed in claim 10, wherein the tubular arm includes a tubular spigot which projects radially from the annular frame and is mounted on the outer end of an intermediate arm portion so as to be rotatable, relative thereto, about its own axis through at least 330*.
Claim 13
Dependent Claim
43 words
A lamp as claimed in claim 11, wherein the intermediate arm portion is mounted on a bush so as to be rotatable, through at least 330* about an axis perpendicular to the axis of the spigot and to the axis of the lamp.
Claim 14
Dependent Claim
41 words
A lamp as claimed in claim 12, wherein the intermediate arm portion is cranked, whereby the axis about which the intermediate arm portion is rotatable is offset from the point at which the spigot is joined to the intermediate arm portion.
References Cited (Backward Citations)
US1884265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |