US3761177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stroboscopic device
Assignee: Chambon Automation SARL
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Filing: 1971-09-07
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Granted: 1973-09-25
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Expires: 1991-09-07
Abstract
Abstract A stroboscopic device for checking the details of a cyclic work performed on a sheet or web in a machine, notably a print made in a rotary printing-machine. It comprises an optical fibre having one end disposed in close proximity of the flash lamp located at a certain distance from the web and the other end located in close proximity of said web so as to illuminate an area where a detail of the work being accomplished is to be checked, said area, due to its intermittent illumination by the light emitted by the flash lamp and transmitted through said optical fibre, appearing as stationary to the observer.
Inventors
- 👤 L Corse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:45
CPC Classifications
B; B41; B41F; B41F33/00; B41F33/02; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803; G01P; G01P3/00; G01P3/36; G01P3/40; G07; G07C; G07C3/00; G07C3/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
223 words
A stroboscopic device for checking the details of an object area on a sheet or web in a machine, notably a print made in a rotary printing machine, which comprises a pulse generator operative to deliver a pulse upon each cycle of operation of the machine, a flash lamp disposed away from the sheet or web and connected to said generator for emitting a flash each time a pulse is fed thereto, an optical observation device mounted in the vicnity of the object area to be checked and permitting the observation thereof, an optical fibre having an input end disposed in close proximity to said flash lamp and an output end kept in close proximity to said sheet or web for illuminating the object area where a detail must be checked and which, due to its intermittent illumination by the light emitted by said flash lamp and transmitted through said optical fibre, appears as a stationary detail to the observer and means comprising an opaque case for having said flash lamp and a movable, hinged door closing one side of said opaque case, the input end of said optical fibre being secured to and through said movable door for illuminating the whole object area when said door is open and for illuminating a detail of said object area when said door is closed.
Claim 2
Dependent Claim
223 words
A stroboscopic device for checking the details of an object area on a sheet or web in a machine, notably a print made in a rotary printing machine, which comprises a pulse generator operative to deliver a pulse upon each cycle of operation of the machine, a flash lamp disposed away from the sheet or web and connected to said generator for emitting a flash each time a pulse is fed thereto, an optical observation device mounted in the vicnity of the object area to be checked and permitting the observation thereof, an optical fibre having an input end disposed in close proximity to said flash lamp and an output end kept in close proximity to said sheet or web for illuminating the object area where a detail must be checked and which, due to its intermittent illumination by the light emitted by said flash lamp and transmitted through said optical fibre, appears as a stationary detail to the observer and means comprising an opaque case for having said flash lamp and a movable, hinged door closing one side of said opaque case, the input end of said optical fibre being secured to and through said movable door for illuminating the whole object area when said door is open and for illuminating a detail of said object area when said door is closed.
Claim 3
Dependent Claim
59 words
Device as set forth in claim 1, which comprises support means movable across said sheet or web for supporting said optical observation device and said output end of said optical fibre, said output end being directed, in said support, towards the sheet or web area lying in axial alignment with the line of sight of the optical observation device.
Claim 4
Dependent Claim
186 words
A stroboscopic device for viewing object object areas periodically passing a viewing zone comprising: means for developing a pulse signal synchronous in time with the passing of each object area through a viewing zone; illuminating means responsive to each pulse signal for illuminating each object area in its entirety while same is in said viewing zone and comprising a light source, and an opaque housing having said light source mounted therein and having means therein defining an aperture; and means coacting with said illuminating means for selectively illuminating only a small portion of each object area while same is in said Viewing zone and comprising a movable cover member for covering and uncovering said aperture, a light transmission member for transmitting light energy from one end thereof to the other end thereof, and mounting means mounting said one end of said light transmission member in said movable cover member for receiving light energy from said light source when said cover member covers said aperture and mounting said other end of said light transmission member in a position to illuminate a small portion of each object area.
Claim 5
Dependent Claim
186 words
A stroboscopic device for viewing object object areas periodically passing a viewing zone comprising: means for developing a pulse signal synchronous in time with the passing of each object area through a viewing zone; illuminating means responsive to each pulse signal for illuminating each object area in its entirety while same is in said viewing zone and comprising a light source, and an opaque housing having said light source mounted therein and having means therein defining an aperture; and means coacting with said illuminating means for selectively illuminating only a small portion of each object area while same is in said Viewing zone and comprising a movable cover member for covering and uncovering said aperture, a light transmission member for transmitting light energy from one end thereof to the other end thereof, and mounting means mounting said one end of said light transmission member in said movable cover member for receiving light energy from said light source when said cover member covers said aperture and mounting said other end of said light transmission member in a position to illuminate a small portion of each object area.
Claim 6
Dependent Claim
37 words
A stroboscopic device according to claim 3; wherein said mounting means includes movable suporting means for movably supporting said other end of said light transmission member to effect illumination of selected small portions of each object area.
Claim 7
Dependent Claim
18 words
A stroboscopic device according to claim 3; wherein said light transmission member comprises at least one optical fiber.
Claim 8
Dependent Claim
44 words
A stroboscopic device according to claim 3; wherein said means for developing a pulse signal comprises variable delay means for delaying each of said pulse signals thereby variably delaying the illumination of each small portion of each object area passing through said viewing zone.
Claim 9
Dependent Claim
184 words
A stroboscopic device according to claim 6; wherein said means for developing a pulse signal comprises a light source, a light sensitive device responsive to light energy from said light source for developing a signal, a rotatable shaft rotably driven synchronous in time with the passing of each object area through said viewing zone, a timing disc having means therein defining an aperture and mounted on said shaft and positioned between said light source and said light sensitive device to periodically align said aperture therebetween to permit light energy to pass therethrough whereby said light sensitive device develops signal pulses during rotation of said timing disc corresponding in time to the passing of light energy through said aperture in each rotation of said timing disc; and wherein said variable delay means comprises means mounting said timing disc on said shaft for rotation therewith and therearound for selectively adjusting the angular position of said aperture relative to said shaft thereby delaying the occurrence of each signal pulse developed by said light sensitive device relative to the passing of each object area through said viewing zone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |