US3685348A — Method and apparatus for testing welding seams by…

Claim 1

Independent Claim 136 words

A method of checking the material of a workpiece along a linear formation for longitudinal and transverse faults in the heterogeneity of the material which includes the steps of: producing ultrasonic vibrations from a single source, separating the ultrasonic rays from said vibrations into a plurality of distinct ultrasonic ray bundles, transmitting said bundles of rays substantially simultaneously to said linear formation with one of said bundles at a right angle to said linear formation and another bundle of rays at less than a right angle to said linear formation, and receiving and recording the rays reflected by said linear formation from each of said bundles, so that reflections of the ray bundle at right angles will indicate longitudinal faults and reflections from the ray bundle at less than a right angle will indicate transverse faults.

Claim 2

Independent Claim 136 words

A method of checking the material of a workpiece along a linear formation for longitudinal and transverse faults in the heterogeneity of the material which includes the steps of: producing ultrasonic vibrations from a single source, separating the ultrasonic rays from said vibrations into a plurality of distinct ultrasonic ray bundles, transmitting said bundles of rays substantially simultaneously to said linear formation with one of said bundles at a right angle to said linear formation and another bundle of rays at less than a right angle to said linear formation, and receiving and recording the rays reflected by said linear formation from each of said bundles, so that reflections of the ray bundle at right angles will indicate longitudinal faults and reflections from the ray bundle at less than a right angle will indicate transverse faults.

Claim 3

Dependent Claim 62 words

A method according to claim 1, in which a plurality of ultrasonic ray bundles are transmitted from each of two single sources of vibrations positioned on opposite sides of said longitudinal formation with the bundles of each source directed to said longitudinal formation at similar angles, said sources operating successively so that one source is inactive when the other source is transmitting.

Claim 4

Dependent Claim 34 words

A method according to claim 2, in which said ultrasonic ray sources are both transmitters and receivers, the inactive transmitter acting as a receiver to actuate a recorder when the other source is transmitting.

Claim 5

Dependent Claim 39 words

A method according to claim 1, in which said ultrasonic ray source transmits three ray bundles at angles to each other, two of said bundles being directed to said longitudinal formation at different angles less than a right angle.

Claim 6

Independent Claim 213 words

An apparatus for non-destructively checking a workpiece, especially a welding seam, in its longitudinal as well as in its transverse direction as to faults in the heterogenity of the section of the material to be checked, which includes: only two ultrasonic heads adapted respectively to be placed on opposite sides of and substantially adjacent to the material section to be checked, means respectively associated with said heads and operable alternately to maintain one of said heads inactive while causing the other head to send sound ray bundles to the material section to be checked and to receive sound waves reflected by said material section to thereby detect faults in the longitudinal and transverse direction of the material section to be checked, and monitor means for recording the reflected sound waves, each of said heads having only one ultrasonic vibrator, the ultrasonic vibrator being adapted respectively to emit two sound ray bundles to opposite sides of said vibrator and which includes a body of synthetic material having said vibrator embedded therein and being adapted to conduct sound, said body being so designed that said two ultrasonic ray bundles are refracted and guided in such a way that they extend through a common coupling surface in predetermined directions toward the material section to be checked.

Claim 7

Independent Claim 213 words

An apparatus for non-destructively checking a workpiece, especially a welding seam, in its longitudinal as well as in its transverse direction as to faults in the heterogenity of the section of the material to be checked, which includes: only two ultrasonic heads adapted respectively to be placed on opposite sides of and substantially adjacent to the material section to be checked, means respectively associated with said heads and operable alternately to maintain one of said heads inactive while causing the other head to send sound ray bundles to the material section to be checked and to receive sound waves reflected by said material section to thereby detect faults in the longitudinal and transverse direction of the material section to be checked, and monitor means for recording the reflected sound waves, each of said heads having only one ultrasonic vibrator, the ultrasonic vibrator being adapted respectively to emit two sound ray bundles to opposite sides of said vibrator and which includes a body of synthetic material having said vibrator embedded therein and being adapted to conduct sound, said body being so designed that said two ultrasonic ray bundles are refracted and guided in such a way that they extend through a common coupling surface in predetermined directions toward the material section to be checked.

Claim 8

Independent Claim 199 words

An apparatus for non-destructively checking a workpiece, especially a welding seam, in its longitudinal as well as in its transverse direction as to faults in the heterogenity of the section of the material to be checked, which includes: only two ultrasonic heads adapted respectively to be placed on opposite sides of and substantially adjacent to the material section to be checked, means respectively associated with said heads and operable alternately to maintain one of said heads inactive while causing the other head to send sound ray bundles to the material section to be checked and to receive sound waves reflected by said material section to thereby detect faults in the longitudinal and transverse direction of the material section to be checked, and monitor means for recording the reflected sound waves, a unilaterally emitting ultrasonic vibrator, and a sound-optical-principle adapter arranged in front of said vibrator, said adapter forming a sound conducting synthetic body having that side thereof which faces away from said ultrasonic vibrator provided with means defining cuts filled with material which is a poor sound conductor, that side of said synthetic body which faces the coupling surface extending at an incline from the outside toward the center.

Claim 9

Independent Claim 199 words

An apparatus for non-destructively checking a workpiece, especially a welding seam, in its longitudinal as well as in its transverse direction as to faults in the heterogenity of the section of the material to be checked, which includes: only two ultrasonic heads adapted respectively to be placed on opposite sides of and substantially adjacent to the material section to be checked, means respectively associated with said heads and operable alternately to maintain one of said heads inactive while causing the other head to send sound ray bundles to the material section to be checked and to receive sound waves reflected by said material section to thereby detect faults in the longitudinal and transverse direction of the material section to be checked, and monitor means for recording the reflected sound waves, a unilaterally emitting ultrasonic vibrator, and a sound-optical-principle adapter arranged in front of said vibrator, said adapter forming a sound conducting synthetic body having that side thereof which faces away from said ultrasonic vibrator provided with means defining cuts filled with material which is a poor sound conductor, that side of said synthetic body which faces the coupling surface extending at an incline from the outside toward the center.

Claim 10

Dependent Claim 30 words

An apparatus according to claim 6, which includes a lead chamber associated with said adapter and filled with a sound refracting liquid, and sleeve means defining boundary for said chamber.

Claim 11

Dependent Claim 30 words

An apparatus according to claim 7, which includes adapter member arranged in front of said chamber and complementarily shaped in conformity with the surface of the workpiece to be checked.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-08-22	1976-02-21	1976-08-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-08-22	1980-02-21	1980-08-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-08-22	1984-02-21	1984-08-22	$7700.00	Window Closed / Lapsed

Method and apparatus for testing welding seams by ultrasound energy

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