US3758769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating light projector
Assignee: PICHEL IND Inc
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Filing: 1972-04-14
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Granted: 1973-09-11
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Expires: 1992-04-14
Abstract
Abstract A light projector for movie projectors, search lights, slide projectors, etc. is provided with a rotating high intensity bulb that increases the life of the bulb and improves the light characteristics of the light projector. The bulb is mounted in special adapters that permit a ready alignment of the bulb with a reflector while maintaining the alignment during rotation of the bulb. A solenoid activated indexer coacts with a pinion gear mounted with respect to the bulb to provide the rotation. The rotation can be continual, a step rotation or a non-uniform rotation. A pair of slip ring bushings are provided to mount the ends of the adapters with one adapter being machined to provide a profile or camming surface, particularly matched to the light spot of the bulb. The slip ring bushings further provide electrical connections for the anode and cathode members of the bulb. The pinion gear is mounted on the bulb and coacts with a ratchet pawl that is driven by a solenoid for rotating the bulb. The pinion gear can double as a director of air flow from a fan along the axial length of the bulb member for cooling purposes. Various plates and rods are arranged to provide an alignment of the bulb member with respect to the reflector through the connection of one of the mounting slip ring bushings. Appropriate circuitry is provided for rotating the bulb, for example, for initiating the rotation upon the energization of the bulb member circuit.
Inventors
- 👤 M Pichel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:03
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/0018; H05B31/0027
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
150 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that the electrodes are substantially aligned in a horizontal plane and a high intensity light source point is created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; and mechanical means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated.
Claim 2
Dependent Claim
150 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that the electrodes are substantially aligned in a horizontal plane and a high intensity light source point is created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; and mechanical means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated.
Claim 3
Dependent Claim
55 words
A high intensity light projector as in claim 1 where the mechanical means for maintaining alignment includes a cam adapter mounted at one end of the high intensity light bulb and having a camming profile which compensates for any misalignment of the high intensity light source point and focal point which would occur upon rotation.
Claim 4
Dependent Claim
37 words
A high intensity light projector as in claim 1 where the means for rotating includes a pinion gear mounted at one end of the high intensity bulb and a motor means for operatively contacting the pinion gear.
Claim 5
Dependent Claim
28 words
A high intensity light projector as in claim 3 further including a plenum chamber surrounding the pinion gear and a source of compressed air connected to the chamber.
Claim 6
Dependent Claim
36 words
A high intensity light projector as in claim 4 where the pinion gear is also a heat sink and has fin like projecting teeth for transmitting heat from the high intensity light bulb to the air.
Claim 7
Dependent Claim
32 words
A high intensity light projector as in claim 5 where the fin like projecting teeth are helical to direct the air in an axial horizontal direction along the high intensity light bulb.
Claim 8
Dependent Claim
28 words
A high intensity light projector as in claim 2 where the support means further includes a slip ring bushing which provides a camming follower for the cam adapter.
Claim 9
Dependent Claim
23 words
A high intensity light projector as in claim 7 where the slip ring provides an electrical connection to the high intensity light bulb.
Claim 10
Dependent Claim
21 words
A high intensity light projector as in claim 7 further including means for aligning the reflector and high intensity light bulb.
Claim 11
Dependent Claim
30 words
A high intensity light projector as in claim 9 where the alignment motion is transmitted to the high intensity light projector through the slip ring bushing and the cam adapter.
Claim 12
Dependent Claim
18 words
A high intensity light projector as in claim 3 where the motor means is a solenoid and pawl.
Claim 13
Dependent Claim
40 words
A high intensity light projector as in claim 3 further including a switch for energizing the high intensity light bulb and means for first energizing the motor means to rotate the high intensity light bulb before energizing the light bulb.
Claim 14
Dependent Claim
38 words
A high intensity light projector as in claim 3 where the support means can pivot about one end relative to the base member to permit the reflector and high intensity light bulb to be moved as a unit.
Claim 15
Dependent Claim
179 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that its electrodes are substantially aligned in a horizontal plane and a high intensity light source point can be created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated; and circuit means for actuating the rotation of the high intensity light bulb before the electrical connectors are activated with electrical power to create the high intensity light source point.
Claim 16
Dependent Claim
179 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that its electrodes are substantially aligned in a horizontal plane and a high intensity light source point can be created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated; and circuit means for actuating the rotation of the high intensity light bulb before the electrical connectors are activated with electrical power to create the high intensity light source point.
Claim 17
Dependent Claim
127 words
An illuminating device reflecting light emitted by an arc source which comprises: an arc lamp having a central envelope portion and a pair of legs extending in opposite directions along a substantially longitudinal axis thereof with each of the legs including an electrode arranged in spaced apart relationship in the central portion of the envelope to provide an electric arc; a reflector having a focal point and being positioned with respect to the arc lamp so that the focal point is within the electric arc; means adapted to receive electrical power to and from said electrodes; and mechanical rotating means connected to the arc lamp for simultaneously rotating and maintaining the electric arc at the focal point of the reflector during rotational revolutions of the arc lamp.
Claim 18
Dependent Claim
127 words
An illuminating device reflecting light emitted by an arc source which comprises: an arc lamp having a central envelope portion and a pair of legs extending in opposite directions along a substantially longitudinal axis thereof with each of the legs including an electrode arranged in spaced apart relationship in the central portion of the envelope to provide an electric arc; a reflector having a focal point and being positioned with respect to the arc lamp so that the focal point is within the electric arc; means adapted to receive electrical power to and from said electrodes; and mechanical rotating means connected to the arc lamp for simultaneously rotating and maintaining the electric arc at the focal point of the reflector during rotational revolutions of the arc lamp.
Claim 19
Dependent Claim
174 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that the electrodes are substantially aligned in a horizontal plane and a high intensity light source point can be created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; and means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated including a camming profile which compensates for any misalignment of the high intensity light source point and focal point which would occur upon rotation.
Claim 20
Dependent Claim
174 words
A high intensity light projector comprising: a base member lying in a horizontal plane; support means vertically mounted on the base member; electrical connectors adapted to be energized by electrical power; a high intensity light bulb having spaced apart electrodes horizontally mounted on the support means and connected to the electrical connectors such that the electrodes are substantially aligned in a horizontal plane and a high intensity light source point can be created between the electrodes; a reflector having a predetermined focal point mounted about the high intensity light bulb with its focal point coinciding with the high intensity light source point; means for rotating the high intensity light bulb to increase the operative life of the high intensity light bulb; and means for maintaining the coincidental alignment of the high intensity light source point and the focal point of the reflector as the high intensity light bulb is rotated including a camming profile which compensates for any misalignment of the high intensity light source point and focal point which would occur upon rotation.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |