US4755916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined flood and spot light
Assignee: ROM Acquisition Corp
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Filing: 1981-07-23
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Granted: 1988-07-05
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Expires: 2001-07-23
Abstract
Abstract A light is provided which includes a first, forwardly concave reflector member, a first, forward lamp spaced ahead of the reflector member, and a second rearwardly concave reflector member spaced forward of the lamp. The rear reflector member has a generally parabolic surface and the forward member has a generally arcuate surface. When the lamp is activated, its rays generally travel forward, are reflected off the second reflector member rearward onto the first reflector member, and thence forward in a substantially parallel array to provide a spot light. A second lamp is located axially rearward of the first lamp and forward of the first reflector. When this lamp is activated, its rays travel generally laterally, strike the first reflector member, and thence are reflected forward in generally random array to provide a flood light. Means are provided to selectively activate either or both of said lamps. In a further embodiment, the first reflective member has a spherical central portion and a parabolic peripheral portion.
Inventors
- 👤 William J. Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
F; F21; F21V; F21V23/00; F21V23/04; B; B60; B60Q; B60Q1/00; B60Q1/0029; B60Q1/0041; B60Q1/0058; F21S; F21S41/00; F21S41/10; F21S41/14; F21S41/162; F21S41/166; F21S41/30; F21S41/32; F21S41/321; F21S41/323; F21S41/36; F21S41/365; F21S41/19; F21V14/00; F21V14/02; F21V19/00; F21V19/02; F21V7/00; F21V7/0008; F21V7/0016; F21V7/0025
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
225 words
A combined flood and spot light comprising: a first reflector member having a rear wall, said reflector member of substantially parabolic cross section and projecting in a forward direction from said rear wall; mounting means carried by said reflector member supporting a forwardly directed first lamp at an axially forwardly spaced relation to the rear wall of the first reflector member; a second reflector member having a substantially arcuate cross section mounted in axially spaced relation forwardly of the first lamp, said second reflector member projecting in a rearward direction toward said rear wall; a second lamp supported on said mounting means in axially spaced relation behind the first lamp and forward of the rear wall of the first reflector member, said second lamp being forwardly directed; means to selectively activate either or both of said lamps; and the relative dimensions and locations of the first and second lamps and first and second reflectors being so chosen that the rays emanating from the first lamp travel primarily forward and are reflected by the second reflector member rearward to the first reflector member and thence are reflected forward in substantially parallel array to provide a spot light, and the rays emanating from the second lamp travel primarily laterally to the first reflector member and thence are reflected forward in random array to provide a flood light.
Claim 2
Dependent Claim
225 words
A combined flood and spot light comprising: a first reflector member having a rear wall, said reflector member of substantially parabolic cross section and projecting in a forward direction from said rear wall; mounting means carried by said reflector member supporting a forwardly directed first lamp at an axially forwardly spaced relation to the rear wall of the first reflector member; a second reflector member having a substantially arcuate cross section mounted in axially spaced relation forwardly of the first lamp, said second reflector member projecting in a rearward direction toward said rear wall; a second lamp supported on said mounting means in axially spaced relation behind the first lamp and forward of the rear wall of the first reflector member, said second lamp being forwardly directed; means to selectively activate either or both of said lamps; and the relative dimensions and locations of the first and second lamps and first and second reflectors being so chosen that the rays emanating from the first lamp travel primarily forward and are reflected by the second reflector member rearward to the first reflector member and thence are reflected forward in substantially parallel array to provide a spot light, and the rays emanating from the second lamp travel primarily laterally to the first reflector member and thence are reflected forward in random array to provide a flood light.
Claim 3
Dependent Claim
35 words
A combined flood and spot light, as claimed in claim 1, in which: the first and second reflector members comprise surfaces of revolution swung about the fore and aft axis of the axially spaced lamps.
Claim 4
Dependent Claim
40 words
A combined flood and spot light, as claimed in claim 2, in which: a light shield is mounted laterally of the second lamp to bar travel of its rays to that portion of the first reflector member behind the shield.
Claim 5
Dependent Claim
66 words
A combined flood and spot light, as claimed in claim 3, in which: the shield has the form of a part of a cylinder having an axis extending fore and aft parallel to the axis of the lamp arrangement; and the inner surface of the shield has a reflecting surface to reflect the rays of the lamp to the opposite portion of the first reflector member.
Claim 6
Dependent Claim
45 words
A combined flood and spot light, as claimed in claim 2, in which: a circular transparent glass plate extends across the open end of the first reflector member and serves as a closure therefor and also serves as a support for the second reflector member.
Claim 7
Dependent Claim
43 words
A combined flood and spot light, as claimed in claim 5, in which: the central portion of the glass plate is of the same size and shape as the second reflector member, and the latter is located in the concavity of the plate.
Claim 8
Dependent Claim
75 words
A combined flood and spot light, as claimed in claim 1, in which: the first reflector member is trough-shaped with a substantial lateral extent and its parabolic cross section is in a vertical plane extending fore and aft normal to its lateral extent; and the second reflector member is also trough-shaped with a substantial lateral extent and its arcuate cross section is in a vertical plane extending fore and aft normal to its lateral extent.
Claim 9
Dependent Claim
30 words
A combined flood and spot light, as claimed in claim 7, in which: the first reflector member terminates with matingly shaped end plate members to reflect lateral light rays forwardly.
Claim 10
Dependent Claim
35 words
A combined flood and spot light, as claimed in claim 8, in which: the second reflector member is mounted on the first reflector member by securing to the end plates of the first reflector member.
Claim 11
Dependent Claim
41 words
A combined flood and spot light, as claimed in claim 7, in which: the filament of each of the lamps extends laterally, parallel to the axes of the reflector members, to increase the widths of the beams of light projected forward.
Claim 12
Dependent Claim
40 words
A combined flood and spot light, as claimed in claim 7, in which: a light shield is mounted laterally of the second lamp to bar travel of its rays to that portion of the first reflector member behind the shield.
Claim 13
Dependent Claim
89 words
A combined flood and spot light, as claimed in claim 2, in which said first reflector member comprises: a central portion having a spherical cross section; and a peripheral portion having a parabolic cross section, so that light reflected from said second reflector and from said first lamp strike said parabolic portion and leave said lamp in a substantially parallel array to form a spot light and light from said second lamp strikes said spherical portion and leaves said lamp in a random array to form a flood light.
Claim 14
Dependent Claim
121 words
A combined flood and spot light comprising: an integral reflector member having at least one reflecting surface and a rear wall, said one reflecting surface of a substantially parabolic cross section about a longitudinal axis of said light; mounting means oriented in preselected position with respect to said reflector member supporting a first lamp and a second lamp in axially forwardly spaced relation to the rear wall of the reflector member on the longitudinal axis, said first lamp mounted at a preselected position, said first and second lamps forwardly directed relative to said rear wall; and means to selectively activate said lamps, activation of said first lamp producing a spot light and activation of said second lamp producing a flood light.
Claim 15
Dependent Claim
121 words
A combined flood and spot light comprising: an integral reflector member having at least one reflecting surface and a rear wall, said one reflecting surface of a substantially parabolic cross section about a longitudinal axis of said light; mounting means oriented in preselected position with respect to said reflector member supporting a first lamp and a second lamp in axially forwardly spaced relation to the rear wall of the reflector member on the longitudinal axis, said first lamp mounted at a preselected position, said first and second lamps forwardly directed relative to said rear wall; and means to selectively activate said lamps, activation of said first lamp producing a spot light and activation of said second lamp producing a flood light.
Claim 16
Dependent Claim
29 words
A combined flood and spot light, as claimed in claim 13, in which: the reflector member comprises a surface of revolution swung about the longitudinal axis of said light.
Claim 17
Dependent Claim
31 words
A combined flood and spot light, as claimed in claim 14, in which: said first lamp is forward relative to the second lamp from said rear wall of said reflector member.
Claim 18
Dependent Claim
35 words
A combined flood and spot light, as claimed in claim 14, in which: said preselected position of said first lamp is essentially at the focal point of the parabolic cross section of said reflector member.
Claim 19
Dependent Claim
42 words
A combined flood and spot light, as claimed in claim 14, in which: a light shield is mounted laterally of the second lamp to bar travel of the second lamp's rays to that portion of the relfector member blocked by the shield.
Claim 20
Dependent Claim
72 words
A combined flood and spot light, as claimed in claim 17, in which: the shield has the form of a part of a cylinder having an axis extending fore and aft parallel to the axis of the first and second lamps; and the shield has an inner reflecting surface to reflect the rays of the second lamp to the opposite portion of the reflector member to that portion blocked by the shield.
Claim 21
Dependent Claim
85 words
A combined flood and spot light, as claimed in claim 14, in which said reflector member comprises: a central reflecting surface having a spherical cross section; and a peripheral reflecting surface having a parabolic cross section, so that light reflected from said lamp strikes said parabolic surface and leaves said first lamp in a substantially parallel array to form a spot light and light from said second lamp strikes said spherical surface and leaves said lamp in a random array to form a flood light.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |