US3704413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of translating the location of a predetermined position on one side of a substantially nonferrous structural barrier of a building to an opposite side of said barrier
Assignee: Individual
•
Filing: 1970-01-07
•
Granted: 1972-11-28
•
Expires: 1990-01-07
Abstract
Abstract A device and method for locating objects through a substantially nonferrous barrier, the use of which may also be applied for determining the thickness of such a barrier and for localized surveying. An audio oscillator serves as a transmitter which emits signals that are picked up by headphones connected to a resonant tuned circuit. The transmitter is placed on or adjacent an object to be located and is set to transmit. Signals from the transmitter may then be located by the headphones and the peak sound from the signal or a null in the signal may be detected to pinpoint the position of the transmitter on the opposite side of the barrier. Whether or not the peak sound or the null is detected depends upon the attitude of the transmitter coil with respect to the receiver coil. For measuring thickness of a particular barrier, the transmitter is located as stated above after which a null circle is detected radially out from the point where the transmitter was located. The distance between the point of location of the transmitter and the null circle is a function of the thickness of the barrier. Alternatively, the null circle diameter may be detected and used to determine barrier thickness.
Inventors
- 👤 Maurice E Blevins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/081
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
208 words
A method for determining the location on one side of a substantially non-ferrous structural barrier of a building that corresponds to a predetermined position on an opposite side of said barrier comprising the steps of: a. locating a position on said opposite side of said barrier; b. placing an operational electromagnetic transmitter means adjacent said position, at least proximate said opposite side of said barrier, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second and setting up a dipole magnetic field thereat; c. providing a receiving means tuned to said transmitter means on said one side of said barrier proximate thereto, and orienting said receiving means such that an axis through a coil core thereof is substantially parallel to an axis through a coil core of said transmitter means; d. detecting a signal from said transmitter means, and moving said receiver along said barrier until a peak signal is received, said peak signal being a function of said magnetic field; and e. noting on said barrier the location of said receiving means where said peak signal was received, whereby the precise location of said predetermined position has been translated from said opposite side to said one side of said barrier.
Claim 2
Independent Claim
208 words
A method for determining the location on one side of a substantially non-ferrous structural barrier of a building that corresponds to a predetermined position on an opposite side of said barrier comprising the steps of: a. locating a position on said opposite side of said barrier; b. placing an operational electromagnetic transmitter means adjacent said position, at least proximate said opposite side of said barrier, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second and setting up a dipole magnetic field thereat; c. providing a receiving means tuned to said transmitter means on said one side of said barrier proximate thereto, and orienting said receiving means such that an axis through a coil core thereof is substantially parallel to an axis through a coil core of said transmitter means; d. detecting a signal from said transmitter means, and moving said receiver along said barrier until a peak signal is received, said peak signal being a function of said magnetic field; and e. noting on said barrier the location of said receiving means where said peak signal was received, whereby the precise location of said predetermined position has been translated from said opposite side to said one side of said barrier.
Claim 3
Dependent Claim
67 words
The method of determining the location on one side of a substantially nonferrous barrier of a building that corresponds to a predetermined position on an opposite side of said barrier as defined in claim 1 wherein the location of said position is pinpointed by continuing to move the receiving means in a circular pattern around the approximate location of said position until the peak signal is noted.
Claim 4
Dependent Claim
102 words
The method of determining the location on one side of a substantially nonferrous barrier of a building that corresponds to a predetermined position on an opposite side of said barrier as defined in claim 1 wherein the location of said position is pinpointed by continuing to move the receiving means along a vertical ordinate until the peak sound is noted, producing a horizontal line through said receiving means, moving said receiving means along a horizontal ordinate until said peak signal is noted, producing a vertical line through said receiving means and extending said horizontal and vertical lines to their point of intersection.
Claim 5
Independent Claim
211 words
A method for determining the location on one side of a substantially non-ferrous structural barrier of a building that corresponds to a predetermined position on an opposite side of said barrier, comprising the steps of: a. locating a position on said opposite side of said barrier; b. placing an operational electromagnetic transmitter means adjacent said position at least proximate said opposite side of said barrier, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second and setting up a dipole magnetic field thereat; c. providing a receiving means tuned to said transmitter means on said one side of said barrier proximate thereto, and orienting said receiving means such that an axis through a coil core thereat is substantially perpendicular to an axis through a coil core of said transmitter means; d. detecting a signal from said transmitter means and moving said receiver along said barrier until a null in said signal is received, said null being a function of said magnetic field; and e. noting on said barrier the location of said receiving means where said null in said signal was received, whereby the precise location of said predetermined position has been translated from said opposite side to said one side of said barrier.
Claim 6
Independent Claim
211 words
A method for determining the location on one side of a substantially non-ferrous structural barrier of a building that corresponds to a predetermined position on an opposite side of said barrier, comprising the steps of: a. locating a position on said opposite side of said barrier; b. placing an operational electromagnetic transmitter means adjacent said position at least proximate said opposite side of said barrier, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second and setting up a dipole magnetic field thereat; c. providing a receiving means tuned to said transmitter means on said one side of said barrier proximate thereto, and orienting said receiving means such that an axis through a coil core thereat is substantially perpendicular to an axis through a coil core of said transmitter means; d. detecting a signal from said transmitter means and moving said receiver along said barrier until a null in said signal is received, said null being a function of said magnetic field; and e. noting on said barrier the location of said receiving means where said null in said signal was received, whereby the precise location of said predetermined position has been translated from said opposite side to said one side of said barrier.
Claim 7
Dependent Claim
109 words
The method of determining the location on one side of a substantially nonferrous barrier of a building that corresponds to a predetermined position on an opposite side of said barrier as defined in claim 4 wherein the location of said position is pinpointed by orienting the receiving means so as to audiblY detect a null in the signal being transmitted, producing a line through the plane of the receiving means, rotating the receiving means to a further angular displacement, detecting the null in the signal for the further angular displacement, producing a line through the plane of the receiving means and projecting the lines to their point of intersection.
Claim 8
Independent Claim
180 words
A method of determining the thickness of a substantially nonferrous barrier comprising the steps of: a. locating a position on one side of said barrier; b. placing an operational transmitter means at said position against said barrier, said transmitter operating at a frequency of from about 400 to about 1,000 cycles per second; c. moving a receiving means tuned to said transmitter means along an opposite side of said barrier proximate thereto, and detecting a signal from said transmitter means; d. continuing to move said tuned receiver means along said opposite side of said barrier until a predetermined feature of said signal is received; e. noting on said opposite side of said barrier the location of said receiving means where said feature of said signal was received; f. moving said receiving means outwardly along said barrier until a null is detected in the signal being emitted by said transmitting means; g. measuring the distance from the point of location of said transmitting means to the null; and h. multiplying said distance by 0.707 to determine the thickness of said barrier.
Claim 9
Independent Claim
180 words
A method of determining the thickness of a substantially nonferrous barrier comprising the steps of: a. locating a position on one side of said barrier; b. placing an operational transmitter means at said position against said barrier, said transmitter operating at a frequency of from about 400 to about 1,000 cycles per second; c. moving a receiving means tuned to said transmitter means along an opposite side of said barrier proximate thereto, and detecting a signal from said transmitter means; d. continuing to move said tuned receiver means along said opposite side of said barrier until a predetermined feature of said signal is received; e. noting on said opposite side of said barrier the location of said receiving means where said feature of said signal was received; f. moving said receiving means outwardly along said barrier until a null is detected in the signal being emitted by said transmitting means; g. measuring the distance from the point of location of said transmitting means to the null; and h. multiplying said distance by 0.707 to determine the thickness of said barrier.
Claim 10
Dependent Claim
66 words
The method of determining the thickness of a substantially nonferrous barrier as defined in claim 6 wherein as the receiving means is moved outwardly along said barrier from the point of location of said transmitting means a calibrated tape is played out from said receiving means and where once the null circle has been detected the thickness of the barrier is read directly from the tape.
Claim 11
Independent Claim
190 words
A method of determining the thickness of a substantially nonferrous barrier comprising the steps of generally locating the position of a transmitting means comprising: a. locating a position on one side of a barrier; b. placing an operational transmitter means against said barrier at said position, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second; c. moving a receiving means tuned to said transmitter means along an opposite side of said barrier to generally detect the location on said opposite side of said barrier of said transmitting means; d. orienting the receiving means such that an axis of the coil core of said receiving means is parallel to the axis through a coil core of said transmitting means; e. moving said receiver means outwardly along said barrier until a null is detected in said signal emitting from said transmitter means; f. moving said receiver means along said barrier to the opposite side of said transmitter means and locating a null in the signal; and g. measuring the distance between said nulls and using this measurement to compute the thickness of the barrier.
Claim 12
Independent Claim
190 words
A method of determining the thickness of a substantially nonferrous barrier comprising the steps of generally locating the position of a transmitting means comprising: a. locating a position on one side of a barrier; b. placing an operational transmitter means against said barrier at said position, said transmitter means operating at a frequency of from about 400 to about 1,000 cycles per second; c. moving a receiving means tuned to said transmitter means along an opposite side of said barrier to generally detect the location on said opposite side of said barrier of said transmitting means; d. orienting the receiving means such that an axis of the coil core of said receiving means is parallel to the axis through a coil core of said transmitting means; e. moving said receiver means outwardly along said barrier until a null is detected in said signal emitting from said transmitter means; f. moving said receiver means along said barrier to the opposite side of said transmitter means and locating a null in the signal; and g. measuring the distance between said nulls and using this measurement to compute the thickness of the barrier.
Claim 13
Dependent Claim
63 words
A method of determining the thickness of a substantially nonferrous barrier as defined in claim 8 wherein as the receiving means is moved from the first located null to the second located null, a calibrated tape is played out from said receiving means, and the barrier thickness is read directly from the tape at the point of location of the said second null.
References Cited (Backward Citations)
US2057835A
Cited
US2167490A
Cited
US2346486A
Cited
US2349429A
Cited
US2486845A
Cited
US2501598A
Cited
US2601249A
Cited
US2820959A
Cited
US3430132A
Cited
US3551795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |