Patent US3821541A successfully refreshed from Google Patents.
US3821541A
Expired / Lapsed
US
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Flashing signal light
Assignee: Individual
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Filing: 1973-01-24
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Granted: 1974-06-28
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Expires: 1993-01-24
Abstract
Abstract A flashing signal light includes a pair of generally vertically spaced lamps mounted on a lamp frame which is pivotable about vertical and horizontal axes. A motor within the casing includes a pair of drive shafts, and a link connects each drive shaft to the frame for pivoting the frame about one of the axes. The frame pivots faster about the horizontal axis than the vertical axis, and a pair of springs extend from the lamp frame on opposite sides of the horizontal axis to the casing for cushioning shocks and vibration in the drive train for pivoting the frame about the horizontal axis as the drive link reaches the end of each reciprocation.
Inventors
- 👤 O Burland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:39
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/2611
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A light structure comprising a casing, a light frame pivotally mounted on the casing for pivotal movement about first and second generally perpendicularly related axes, a lamp mounted on the lamp frame, a motor mounted on the casing and having a pair of drive shafts, first crank means connecting one of the drive shafts to the lamp frame for pivoting the lamp frame about the first axis, second crank means connecting the other drive shaft to the lamp frame for pivoting the lamp frame about the second axis, and spring means extending between the lamp frame and the casing for resiliently resisting pivotal movement of the lamp frame about one of the axes, a second lamp mounted on the lamp frame in spaced relation to the first lamp, the first pivotal axis extending generally parallel to a center line extending between the two lamps and the second pivotal axis extending between the two lamps and generally perpendicularly to a center line, the spring means comprising a coil spring connected to the lamp frame at a point spaced from the second axis whereby the spring is tensioned and compressed as the lamp frame pivots about the second axis.
Claim 2
Dependent Claim
197 words
A light structure comprising a casing, a light frame pivotally mounted on the casing for pivotal movement about first and second generally perpendicularly related axes, a lamp mounted on the lamp frame, a motor mounted on the casing and having a pair of drive shafts, first crank means connecting one of the drive shafts to the lamp frame for pivoting the lamp frame about the first axis, second crank means connecting the other drive shaft to the lamp frame for pivoting the lamp frame about the second axis, and spring means extending between the lamp frame and the casing for resiliently resisting pivotal movement of the lamp frame about one of the axes, a second lamp mounted on the lamp frame in spaced relation to the first lamp, the first pivotal axis extending generally parallel to a center line extending between the two lamps and the second pivotal axis extending between the two lamps and generally perpendicularly to a center line, the spring means comprising a coil spring connected to the lamp frame at a point spaced from the second axis whereby the spring is tensioned and compressed as the lamp frame pivots about the second axis.
Claim 3
Dependent Claim
41 words
The structure of claim 1 in which the lamp frame has a pair of ends on opposite sides of the second axis, the second crank means and the spring being connected to the lamp frame adjacent one of the ends thereof.
Claim 4
Dependent Claim
61 words
The structure of claim 2 including a second coil spring connected to the casing and to the lamp frame adjacent the other end thereof whereby the first spring is tensioned when the lamp frame pivots in one direction about the second axis and the second spring is tensioned when the lamp frame pivots in the other direction about the second axis.
Claim 5
Dependent Claim
33 words
The structure of claim 1 in which the second drive shaft rotates faster than the first drive shaft whereby the lamp frame pivots faster about the second axis than about the first axis.
Claim 6
Dependent Claim
52 words
The structure of claim 1 in which the second drive shaft rotates about three times faster than the first drive shaft whereby each light beam of the lamps traces a generally sinusoidal path comprising about one and a half sine waves during a half cycle of pivotal movement about the first axis.
Claim 7
Dependent Claim
163 words
A light structure comprising a casing, a generally vertically extending lamp frame pivotally mounted on the casing for pivotal movement about generally vertical and horizontal axes, a pair of lamps mounted on the lamp frame above and below the horizontal pivotal axis, a motor mounted on the casing and having a pair of drive shafts, a first link connected to the lamp frame laterally of the vertical pivotal axis and eccentrically connected to one of the drive shafts for pivoting the lamp frame about the vertical axis, a second link connected to the lamp frame at a point spaced from the horizontal axis and eccentrically connected to the other drive shaft for pivoting the lamp frame about the horizontal axis, a coil spring having one end connected to the casing and the other end connected to the lamp frame at a point spaced from the horizontal axis, the spring being tensioned as the lamp frame pivots in one direction about the horizontal axis.
Claim 8
Dependent Claim
163 words
A light structure comprising a casing, a generally vertically extending lamp frame pivotally mounted on the casing for pivotal movement about generally vertical and horizontal axes, a pair of lamps mounted on the lamp frame above and below the horizontal pivotal axis, a motor mounted on the casing and having a pair of drive shafts, a first link connected to the lamp frame laterally of the vertical pivotal axis and eccentrically connected to one of the drive shafts for pivoting the lamp frame about the vertical axis, a second link connected to the lamp frame at a point spaced from the horizontal axis and eccentrically connected to the other drive shaft for pivoting the lamp frame about the horizontal axis, a coil spring having one end connected to the casing and the other end connected to the lamp frame at a point spaced from the horizontal axis, the spring being tensioned as the lamp frame pivots in one direction about the horizontal axis.
Claim 9
Dependent Claim
66 words
The structure of claim 6 including a second spring having one end connected to the casing and the other end connected to the lamp frame at a point spaced from the horizontal axis, the two springs being generally equally spaced from the horizontal axis on opposite sides thereof, the second spring being tensioned as the lamp frame pivots in the other direction about the horizontal axis.
Claim 10
Dependent Claim
38 words
The structure of claim 7 in which the lengths of the springs are such that the first spring is compressed as the second spring is tensioned and the second spring is compressed as the first spring is tensioned.
Claim 11
Dependent Claim
52 words
The structure of claim 8 in which the other drive shaft rotates about three times faster than said one drive shaft whereby each light beam of the lamps traces a generally sinusoidal path comprising about one and a half sine waves during a half cycle of pivotal movement about the vertical axis.
Claim 12
Dependent Claim
174 words
The structure of claim 6 including a second spring having one end connected to the casing and the other end connected to the lamp frame at a point spaced from the horizontal axis, the two springs being generally equally spaced from the horizontal axis on opposite sides thereof, each spring being in a substantially untensioned condition when the lamp frame is midway between the extremes of pivotal movement about the horizontal axis, the first spring being tensioned and the second spring being compressed as the lamp frame pivots in one direction about the horizontal axis toward one extreme position and the first spring being compressed and the second spring being tensioned as the lamp pivots in the other direction about the horizontal axis toward the other extreme position, the other drive shaft being rotatable about three times faster than said one drive shaft whereby each light beam of the lamps traces a generally sinusoidal path comprising about one and a half sine waves during a half cycle of pivotal movement about the vertical axis.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |