Patent US3686932A successfully refreshed from Google Patents.
US3686932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and an apparatus for examining the seams of welded pipes
Assignee: Individual
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Filing: 1970-08-05
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Granted: 1972-08-29
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Expires: 1990-08-05
Abstract
Abstract A method and an apparatus for the examination of the welding seams of welded pipes, wherein after forming the seam it is subjected to an ultrasonic examination along the entire length in production flow, certain locations of potential problems giving off distinguishing signals. Thereafter X-ray films are brought into engagement with the pipe wall at the locations resulting in such distinguishing signals, and finally an X-raying of the pipe wall is effected at these locations, said method and said apparatus being characterized by the steps or means of initially signalling to a positioning means all locations of a pipe giving off distinguishing signals during an ultrasonic pre-scan and then, at an X-ray station, placing X-ray films onto a backing at these signalled locations before the pipe is moved over said backing so that X-raying can be effected at these locations.
Inventors
- 👤 Karl Ries
- 👤 Helmut Wimmer
- 👤 Theodor Biller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:22
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/18; G01N23/083; G01N29/00; G01N29/04; G01N29/048
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A method of examining the seams of welded pipes comprising the steps of subjecting said seam to an ultrasonic examination along its entire length in such manner that locations of potential problems give off a distinguishing signal, noting such locations, signalling such locations to an X-ray station before said pipes reach said station, positioning X-ray films at said station at spaced positions corresponding to the locations, advancing said pipes to said station so that its locations are in regIstry with the spaced positions where X-ray films have been provided, and X-raying said pipes at said locations.
Claim 2
Independent Claim
96 words
A method of examining the seams of welded pipes comprising the steps of subjecting said seam to an ultrasonic examination along its entire length in such manner that locations of potential problems give off a distinguishing signal, noting such locations, signalling such locations to an X-ray station before said pipes reach said station, positioning X-ray films at said station at spaced positions corresponding to the locations, advancing said pipes to said station so that its locations are in regIstry with the spaced positions where X-ray films have been provided, and X-raying said pipes at said locations.
Claim 3
Dependent Claim
35 words
A method according to claim 1, wherein said films are positioned on a backing, said pipes moving over said backing so that said X-rays are beamed from outside said pipes toward films inside said pipes.
Claim 4
Independent Claim
243 words
An apparatus for examining the seams of welded pipes, comprising a first station for receiving an ultrasonically pre-examined pipe whose locations of potential problems have been noted, a second station positioned downstream of said first station and provided with means movable in axial direction for the pipe for X-raying, each station having a strip arranged coextensive of the pipe and at least as long as the pipe to be examined, said pipe being marked whereby it may be positioned in both stations with the same axial association of the pipe relative to the strips, the two strips being subdivided into a plurality of sections and each of the sections of the strip of the first station having a signal emitter respectively connected to a signal receiver on each of the sections of the strip of the second station, the emitters being actuated in accordance with corresponding locations of said noted potential problems upon positioning the pipe at the first station, a support arm in the second station for receiving X-ray films positioned in accordance with locations indicated by the signal receivers, said support arm extending along the length of the pipe and being arranged adjacent the strip in a position axially fixed relative to the strip in such a way that it is positioned within the pipe after moving the pipe into the second station, and means for urging said support arm against the internal wall of a pipe in said second station.
Claim 5
Independent Claim
243 words
An apparatus for examining the seams of welded pipes, comprising a first station for receiving an ultrasonically pre-examined pipe whose locations of potential problems have been noted, a second station positioned downstream of said first station and provided with means movable in axial direction for the pipe for X-raying, each station having a strip arranged coextensive of the pipe and at least as long as the pipe to be examined, said pipe being marked whereby it may be positioned in both stations with the same axial association of the pipe relative to the strips, the two strips being subdivided into a plurality of sections and each of the sections of the strip of the first station having a signal emitter respectively connected to a signal receiver on each of the sections of the strip of the second station, the emitters being actuated in accordance with corresponding locations of said noted potential problems upon positioning the pipe at the first station, a support arm in the second station for receiving X-ray films positioned in accordance with locations indicated by the signal receivers, said support arm extending along the length of the pipe and being arranged adjacent the strip in a position axially fixed relative to the strip in such a way that it is positioned within the pipe after moving the pipe into the second station, and means for urging said support arm against the internal wall of a pipe in said second station.
Claim 6
Dependent Claim
80 words
An apparatus as defined in claim 3, wherein each section of the strip of the second station has at least two signal receivers operable independently of one another, one of said receivers being used to receive signals pursuant to which film is positioned for a pipe immediately to arrive in said second station, the other of said receivers being used to receive signals from the next pipe in said first station in preparation for the next positioning of the films.
Claim 7
Dependent Claim
30 words
An apparatus as defined in claim 3, including a rail parallel to said support arm and carrying at least one X-ray device movable in accordance with actuation of the emitters.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |