US3715710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar acoustic pulse generator
Assignee: Individual
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Filing: 1970-11-25
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Granted: 1973-02-06
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Expires: 1990-11-25
Abstract
Abstract Unipolar acoustic pulses of relatively large amplitude and short duration are formed by driving an electroacoustical transducer with a generally staircase-shaped waveform, advantageously through a low pass filter. The applied waveform is formed by linearly summing constituent electrical pulses of preselected amplitude, duration, polarity, and relative time of occurrence. The transducer driving signal acts to reinforce the transducer output in the desired direction, while opposing its output in the reverse direction.
Inventors
- 👤 J Bernstein
- 👤 S Schildkraut
- 👤 J Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:38
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0215; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28; H; H03; H03K; H03K4/00; H03K4/02; H03K4/026
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
109 words
Apparatus for generating a unipolar acoustic wave of a given polarity comprising: a transducer; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition in the characteristic response of said transducer to an initial signal discontinuity for substantially dampening the response of said transducer, and at least one further sudden transition in amplitude timed to coincide with a zero output transition in the dampened transducer response for further dampening said transducer response, said sudden transitions in signal amplitude acting to suppress the transducer acoustic output of undesired polarity; and means for applying said discontinuous signal to said transducer.
Claim 2
Dependent Claim
109 words
Apparatus for generating a unipolar acoustic wave of a given polarity comprising: a transducer; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition in the characteristic response of said transducer to an initial signal discontinuity for substantially dampening the response of said transducer, and at least one further sudden transition in amplitude timed to coincide with a zero output transition in the dampened transducer response for further dampening said transducer response, said sudden transitions in signal amplitude acting to suppress the transducer acoustic output of undesired polarity; and means for applying said discontinuous signal to said transducer.
Claim 3
Dependent Claim
109 words
Apparatus for generating a unipolar acoustic wave of a given polarity comprising: a transducer; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition in the characteristic response of said transducer to an initial signal discontinuity for substantially dampening the response of said transducer, and at least one further sudden transition in amplitude timed to coincide with a zero output transition in the dampened transducer response for further dampening said transducer response, said sudden transitions in signal amplitude acting to suppress the transducer acoustic output of undesired polarity; and means for applying said discontinuous signal to said transducer.
Claim 4
Dependent Claim
109 words
Apparatus for generating a unipolar acoustic wave of a given polarity comprising: a transducer; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition in the characteristic response of said transducer to an initial signal discontinuity for substantially dampening the response of said transducer, and at least one further sudden transition in amplitude timed to coincide with a zero output transition in the dampened transducer response for further dampening said transducer response, said sudden transitions in signal amplitude acting to suppress the transducer acoustic output of undesired polarity; and means for applying said discontinuous signal to said transducer.
Claim 5
Dependent Claim
39 words
The apparatus defined in claim 1 wherein said means for generating a discontinuous signal comprises: means for generating a plurality of substantially stepped output signals; and means for additively combining said stepped output signals to produce said discontinuous signal.
Claim 6
Dependent Claim
26 words
The apparatus defined in claim 2 wherein said means for applying said discontinuous signal to said transducer includes means for low pass filtering said discontinuous signal.
Claim 7
Dependent Claim
48 words
The apparatus defined in claim 2 wherein said means for generating a plurality of substantially stepped output signals comprises means for timing the start of at least one of said stepped output signals to coincide with said first zero output transition in the characteristic response of said transducer.
Claim 8
Dependent Claim
45 words
The apparatus defined in claim 4 wherein said means for generating a plurality of substantially stepped output signals further comprises means for timing the start of at least one further stepped output signal to coincide with said zero output transition in said dampened transducer response.
Claim 9
Dependent Claim
69 words
The apparatus defined in clAim 2 wherein said means for generating a plurality of substantially stepped output signals comprises: trigger signal generating means; a plurality of delay means responsive to said trigger signal generating means for producing a plurality of delayed trigger signals; and a plurality of monostable multivibrators, each responding to one of said delayed trigger signals by starting to generate a stepped output signal of predetermined duration.
Claim 10
Dependent Claim
26 words
The apparatus defined in claim 6 wherein said means for applying said discontinuous signal to said transducer includes means for low pass filtering said discontinuous signal.
Claim 11
Dependent Claim
40 words
The apparatus defined in claim 6 wherein the start of at least one of said stepped output signals is delayed relative to said initial discontinuity to coincide with said first zero output transition in the characteristic response of said transducer.
Claim 12
Dependent Claim
36 words
The apparatus defined in claim 8 wherein the start of at least one further stepped output signal is delayed relative to said initial discontinuity to coincide with said zero output transition in said dampened transducer response.
Claim 13
Dependent Claim
27 words
The apparatus defined in claim 1 further comprising means for initially exciting said transducer for movement in a direction opposite to that of said unipolar acoustic wave.
Claim 14
Dependent Claim
107 words
Apparatus for generating a unipolar acoustic wave comprising: a transducer having a plurality of resonant modes of oscillation; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition associated with oscillation of said transducer in a predetermined one of said resonant modes in response to an initial signal discontinuity for substantially dampening the oscillation of said transducer in said predetermined mode, and at least one further sudden transition in amplitude for substantially dampening the oscillation of said transducer in a mode other than said predetermined mode; and means for applying said discontinuous signal to said transducer.
Claim 15
Dependent Claim
107 words
Apparatus for generating a unipolar acoustic wave comprising: a transducer having a plurality of resonant modes of oscillation; means for generating a discontinuous signal having a sudden transition in amplitude timed to coincide with a first zero output transition associated with oscillation of said transducer in a predetermined one of said resonant modes in response to an initial signal discontinuity for substantially dampening the oscillation of said transducer in said predetermined mode, and at least one further sudden transition in amplitude for substantially dampening the oscillation of said transducer in a mode other than said predetermined mode; and means for applying said discontinuous signal to said transducer.
Claim 16
Dependent Claim
37 words
The apparatus defined in claim 11 wherein said means for generating a discontinuous signal comprises means for timing said further signal sudden transition to coincide with a further zero output transition in the response of said transducer.
Claim 17
Dependent Claim
26 words
The apparatus defined in claim 12 wherein said means for applying said discontinuous signal to said transducer includes means for low pass filtering said discontinuous signal.
Claim 18
Dependent Claim
38 words
The apparatus defined in claim 11 wherein said means for generating a discontinuous signal comprises: means for generating a plurality of stepped output signals and means for additively combining said stepped output signals to produce said discontinuous signal.
Claim 19
Dependent Claim
40 words
The apparatus defined in claim 14 wherein said means for generating a plurality of stepped output signals comprises means for timing the start of at least one of said stepped output signals to coincide with said first zero output transition.
Claim 20
Dependent Claim
46 words
The apparatus defined in claim 15 wherein said means for generating a plurality of stepped output signals further comprises means for timing the start of at least one further stepped output signal to coincide with a further zero output transition in the response of said transducer.
Claim 21
Dependent Claim
26 words
The apparatus defined in claim 16 wherein said means for applying said discontinuous signal to said transducer includes means for low pass filtering said discontinuous signal.
Claim 22
Dependent Claim
68 words
The apparatus defined in claim 14 wherein said means for generating a plurality of stepped output signals comprises: trigger signal generating means; a plurality of delay means responsive to said trigger signal generating means for producing a plurality of delayed trigger signals; and a plurality of monostable multivibrators, each responding to one of said delayed trigger signals by starting to generate a stepped output signal of predetermined duration.
Claim 23
Dependent Claim
45 words
The apparatus defined in claim 18 wherein the delay means assocIated with at least one of said monostable multivibrators delays the triggering of said monostable multivibrator relative to the triggering of a first of said monostable multivibrators to correspond to said first zero output transition.
Claim 24
Dependent Claim
49 words
The apparatus defined in claim 19 wherein the delay means associated with at least one further monostable multivibrator delays the triggering of said further monostable multivibrator relative to the triggering of said first monostable multivibrator to correspond to a further zero output transition in the response to said transducer.
Claim 25
Dependent Claim
26 words
The apparatus defined in claim 20 wherein said means for applying said discontinuous signal to said transducer includes means for low pass filtering said discontinuous signal.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |