US4439723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic and VHF locator of electrical systems defects
Assignee: Individual
•
Filing: 1981-05-11
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Granted: 1984-03-27
•
Expires: 2001-05-11
Abstract
Abstract An ultrasonic detecting transducer and a VHF detecting antenna for locating electrical systems defects are mounted on a probe housing and connected through an RF detector to an audio amplifier and speaker contained in the housing, the speaker communicating with the adjacent connected end of an elongated, hollow, electrically non-conductive, substantially rigid pole the opposite, outer handle portion of which pole is rotatable relative to the inner portion and is perforated to allow sounds from the speaker to be heard by the operator grasping the handle portion. A switch is provided on the housing for shorting the VHF detecting antenna when the ultrasonic detecting component is to be used.
Inventors
- 👤 Marvin O. Loftness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:13
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08; G01R31/081; G01R31/086; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/07; G01R31/50; G01R31/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
An electrical systems defect locator, comprising: a. a probe housing, b. an ultrasonic transducer on the probe housing for receiving ultrasonic emissions and converting them to electrical output signals, c. a VHF antenna on the probe housing for receiving VHF emissions d. converter means on the probe housing for converting said electric output signals and VHF emissions to electric audio frequency signals, e. an audio speaker on the probe housing connected to the output of the converter means, and f. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, g. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
Claim 2
Dependent Claim
131 words
An electrical systems defect locator, comprising: a. a probe housing, b. an ultrasonic transducer on the probe housing for receiving ultrasonic emissions and converting them to electrical output signals, c. a VHF antenna on the probe housing for receiving VHF emissions d. converter means on the probe housing for converting said electric output signals and VHF emissions to electric audio frequency signals, e. an audio speaker on the probe housing connected to the output of the converter means, and f. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, g. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
Claim 3
Dependent Claim
29 words
The electrical systems defect locator of claim 1 including switch means associated with the VHF antenna for removing VHF signals from the converter means when searching for ultrasonic emissions.
Claim 4
Dependent Claim
23 words
The electrical systems defect locator of claim 2 wherein the switch means is arranged to short the antenna to common electric circuit ground.
Claim 5
Dependent Claim
58 words
The electrical systems defect locator of claim 3 wherein the switch means comprises an electrically conductive threaded bushing slidable supporting the antenna and separated electrically from the common electric circuit ground, a knob threaded onto the bushing and having an electrically conductive portion engaging the bushing and arranged upon rotation to removably engage the common electric circuit ground.
Claim 6
Dependent Claim
37 words
The electrical systems defect locator of claim 1 including means associated with the antenna for limiting the VHF input signals to the converter means to a frequency range of from about 90 mHz to about 110 mHz.
Claim 7
Dependent Claim
26 words
The electrical systems defect locator of claim 5 wherein the frequency limiting means comprises a tuned circuit connected between the antenna and common electric circuit ground.
Claim 8
Dependent Claim
27 words
The electrical systems defect locator of claim 1 including means providing a spark gap between the antenna and ground for discharging high voltage contacted by the antenna.
Claim 9
Dependent Claim
60 words
The electrical systems defect locator of claim 1 wherein the pole comprises two longitudinal sections interconnected for rotation one relative to the other, the section including the said opposite end portion having said opening through a side thereof, whereby to allow adjustment of the said opening and the ultrasonic transducer to any desired position of rotation relative to each other.
Claim 10
Dependent Claim
130 words
The electrical systems defect locator of claim 1 including: a. switch means associated with the VHF antenna for removing VHF signals from the couverter means when searching for ultrasonic emissions, b. means associated with the antenna for limiting the VHF input signals to the converter to a frequency range of from about 90 mHz to about 110 mHz, and c. means providing a spark gap between the antenna and ground for discharging high voltage contacted by the antenna, d. the pole comprising two longitudinal sections interconnected for rotation one relative to the other, the section including the said opposite end portion having said opening through a side thereof, whereby to allow adjustment of the said opening and the ultrasonic transducer to any desired position of rotation relative to each other.
Claim 11
Dependent Claim
40 words
The electrical systems defect locator of claim 9 wherein the switch means is arranged to short the antenna to common electric circuit ground and the frequency limiting means comprises a tuned circuit connected between the antenna and common electric ground.
Claim 12
Dependent Claim
116 words
An electrical systems defect locator, comprising: a. a probe housing, b. an ultrasonic transducer on the probe housing for receiving ultrasonic emissions and converting them to electrical output signals, c. converter means on the probe housing for converting said electric output signals to electric audio frequency signals, d. an audio speaker on the probe housing connected to the output of the converter means, and e. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, f. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
Claim 13
Dependent Claim
116 words
An electrical systems defect locator, comprising: a. a probe housing, b. an ultrasonic transducer on the probe housing for receiving ultrasonic emissions and converting them to electrical output signals, c. converter means on the probe housing for converting said electric output signals to electric audio frequency signals, d. an audio speaker on the probe housing connected to the output of the converter means, and e. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, f. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
Claim 14
Dependent Claim
107 words
An electrical systems defect locator, comprising: a. a probe housing, b. a VHF antenna on the probe housing for receiving VHF emissions, c. converter means on the probe housing for converting said VHF emissions to electric audio frequency signals, an audio speaker on the probe housing connected to the output of the converter means, and e. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, f. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
Claim 15
Dependent Claim
107 words
An electrical systems defect locator, comprising: a. a probe housing, b. a VHF antenna on the probe housing for receiving VHF emissions, c. converter means on the probe housing for converting said VHF emissions to electric audio frequency signals, an audio speaker on the probe housing connected to the output of the converter means, and e. an elongated, hollow, electrically non-conductive pole connected at one end to the probe housing and communicating with the speaker, f. the opposite end portion of the pole being arranged for grasping by the hands of an operator and having an opening therethrough for the exit of audible sound from the speaker.
References Cited (Backward Citations)
US2142304A
Cited
US3345560A
Cited
GB1172683A
Cited
US3551804A
Cited
US3820018A
Cited
US3857091A
Cited
US4072899A
Cited
US4158169A
Cited
US4316139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |