US4917487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection apparatus
Assignee: P&W/LBP Master Partnership
•
Filing: 1988-08-19
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Granted: 1990-04-17
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Expires: 2008-08-19
Abstract
Abstract A projection apparatus has a strobed light source projecting light through a transparency, the transparency having one or preferably a plurality of narrow slits formed thereon so as to project a light pattern upon an object. The transparency is mounted in a holder which is arranged to be moved across the path of the light source by being mounted in a holder which is driven by a cam. The light source is arranged to be pulsed on when the holder is on a dwell point of the cam. If the transparency has a plurality of slits therein simultaneous display of multiple profiles on an object is performed to provide a large number of profiles in a minimal time span. In the disclosure, two different manners of driving the transparency in the holder are given.
Inventors
- 👤 John S. Cruickshank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:21
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/24; G01B11/25; G01B11/2518; G01B11/2522
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A projection apparatus for illuminating a plurality of profiles of an object including radiant energy means adapted to project a beam of radiation through means defining a slit aperture, a holder for supporting said means defining said slit aperture and a cam means having a plurality of different dwell positions thereon arranged to drive the means defining the slit aperture across the path of the radiant energy means whereby differing portions of an object may be successively illuminated.
Claim 2
Dependent Claim
78 words
A projection apparatus for illuminating a plurality of profiles of an object including radiant energy means adapted to project a beam of radiation through means defining a slit aperture, a holder for supporting said means defining said slit aperture and a cam means having a plurality of different dwell positions thereon arranged to drive the means defining the slit aperture across the path of the radiant energy means whereby differing portions of an object may be successively illuminated.
Claim 3
Dependent Claim
19 words
An apparatus as claimed in claim 1 wherein the means defining a slit aperture is provided on a transparency.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 2 wherein the radiant energy means is a light means, the transparency has a plurality of slit apertures provided thereon and said cam means moves said transparency with respect to the light means.
Claim 5
Dependent Claim
33 words
An apparatus as claimed in claim 1 wherein the holder is mounted on a pivot and arranged to be driven arcuately about said pivot by a cam follower engageable with said cam means.
Claim 6
Dependent Claim
39 words
An apparatus as claimed in claim 1 wherein the holder is slidably mounted for transverse movement across the projected light beam and arranged to be driven in a reciprocle fashion by a cam follower engageable with said cam means.
Claim 7
Dependent Claim
37 words
An apparatus as claimed in claim 3 wherein the light means is a strobe light source and a timing means is provided to ensure the strobe light source fires at each dwell position of said cam means.
Claim 8
Dependent Claim
41 words
An apparatus as claimed in claim 1 wherein a plurality of said projection apparatuses are provided for circumferential location about an object and a sequencing means is provided for providing said radiant energy to each projection apparatus in a predetermined sequence.
Claim 9
Dependent Claim
93 words
An apparatus as claimed in claim 7 wherein said sequencing means comprises a housing in which is located said radiant energy means and a means for sequentially applying said radiant energy to a plurality of radiant energy transmitting means spaced around said housing, said radiant energy transmitting means coupling with a lens of each projection apparatus, said sequencing means further including a sensing means for synchronising the sequentially applying means with detector means for detecting when said dwell means momentarily holds the means defining a slit aperture stationary on a predetermined projection apparatus.
Claim 10
Dependent Claim
74 words
A projection apparatus for illuminating a plurality of profiles of an object including a light means adapted to project a beam of light through a plurality of split apertures provided on a transparency, a holder supporting said transparency and a rotatable cam having a plurality of different radial dwell positions thereon arranged to drive the slit apertures across the path of the light beam whereby differing portions of an object may be successively illuminated.
Claim 11
Dependent Claim
74 words
A projection apparatus for illuminating a plurality of profiles of an object including a light means adapted to project a beam of light through a plurality of split apertures provided on a transparency, a holder supporting said transparency and a rotatable cam having a plurality of different radial dwell positions thereon arranged to drive the slit apertures across the path of the light beam whereby differing portions of an object may be successively illuminated.
Claim 12
Dependent Claim
33 words
An apparatus as claimed in claim 9 wherein the holder is mounted on a pivot and arranged to be driven arcuately about said pivot by a cam follower engageable with said rotatable cam.
Claim 13
Dependent Claim
39 words
An apparatus as claimed in claim 9 wherein the holder is slidably mounted for transverse movement across the projected light beam and arranged to be driven in a reciprocal fashion by a cam follower engageable with said rotatable cam.
Claim 14
Dependent Claim
36 words
An apparatus as claimed in claim 9 wherein the light means is a strobe light source and a timing means is provided to ensure the strobe light source fires at each dwell position of said cam.
Claim 15
Dependent Claim
41 words
An apparatus as claimed in claim 9 wherein a plurality of said projection apparatuses are provided for circumferential location about an object and a sequencing means is provided for providing said radiant energy to each projection apparatus in a predetermined sequence.
Claim 16
Dependent Claim
87 words
An apparatus as claimed in claim 13 wherein said sequencing means comprises a housing in which is located said light means and a means for sequentially applying said radiant energy to a plurality of light transmitting means spaced around said housing, said light transmitting means coupling with a lens of each projection apparatus, said sequencing means further including a sensing means for synchronising the sequentially applying means with detector means for detecting when said dwell means momentarily holds the slit aperture stationary on a predetermined projection apparatus.
References Cited (Backward Citations)
US891013A
Cited
US1382978A
Cited
US1546636A
Cited
US1594607A
Cited
US1514138A
Cited
US2066996A
Cited
US2163124A
Cited
US2163125A
Cited
US2335127A
Cited
GB939262A
Cited
GB939261A
Cited
US3085923A
Cited
US3246570A
Cited
US3546377A
Cited
US3690242A
Cited
US3688676A
Cited
US3624371A
Cited
US3796129A
Cited
US3976382A
Cited
US3884577A
Cited
US3866052A
Cited
US3969577A
Cited
US3932923A
Cited
US4060318A
Cited
US4202612A
Cited
US4302097A
Cited
US4472056A
Cited
US4491868A
Cited
US4509075A
Cited
US4458993A
Cited
US4613234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |