Patent US3813744A successfully refreshed from Google Patents.
US3813744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophone treatment
Assignee: Seismic Logs Inc
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Filing: 1972-12-08
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Granted: 1974-06-04
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Expires: 1992-12-08
Abstract
Abstract Disclosed is a method of manufacturing a motion sensitive detector of the type having a receptacle with a cylindrical chamber, a transducer, and an inflated envelope. In the method the receptacle is first filled by weight with an acoustic transmission compound and thereafter the transducer and inflated envelope are mounted in the receptacle. The receptacle is vented to the atmosphere and centrifuged to degas the acoustic transmission compound. Next, air is evacuated from the top of the receptacle and the receptacle is sealed. The inflated envelope is then evacuated and the centrifuge process repeated with the receptacle sealed to form a void in the top of the receptacle about 0.1 to 0.2 inches high.
Inventors
- 👤 H Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:20
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
54 words
A method of manufacturing a motion sensitive detector, comprising the steps of: locating a pressure sensitive transducer in a cavity of a receptacle; filling said cavity with acoustic transmission fluid; sealing said cavity; migrating air suspended in said acoustic transmission fluid to one end of said cavity; and then evacuating air from said cavity.
Claim 2
Independent Claim
54 words
A method of manufacturing a motion sensitive detector, comprising the steps of: locating a pressure sensitive transducer in a cavity of a receptacle; filling said cavity with acoustic transmission fluid; sealing said cavity; migrating air suspended in said acoustic transmission fluid to one end of said cavity; and then evacuating air from said cavity.
Claim 3
Dependent Claim
24 words
A method as defined in claim 1 wherein said cavity is evacuated to at least a negative pressure of approximately 30 inches of mercury.
Claim 4
Dependent Claim
22 words
A method as defined in claim 1 wherein the receptacle is subjected to acceleration forces by rotating the receptacle on a centrifuge.
Claim 5
Dependent Claim
19 words
A method as defined in claim 1 wherein the receptacle is subjected to at least 260 times gravitational acceleration.
Claim 6
Independent Claim
55 words
A method for increasing the performance of a motion sensitive detector having a pressure sensitive transducer mounted in a sealed cavity of a receptacle, and wherein said cavity is filled with acoustic transmission fluid, comprising the steps of: subjecting said receptacle to acceleration forces in excess of gravity; and then evacuating air from said cavity.
Claim 7
Independent Claim
55 words
A method for increasing the performance of a motion sensitive detector having a pressure sensitive transducer mounted in a sealed cavity of a receptacle, and wherein said cavity is filled with acoustic transmission fluid, comprising the steps of: subjecting said receptacle to acceleration forces in excess of gravity; and then evacuating air from said cavity.
Claim 8
Dependent Claim
24 words
A method as defined in claim 5 wherein said cavity is evacuated to at least a negative pressure of approximately 30 inches of mercury.
Claim 9
Dependent Claim
22 words
A method as defined in claim 5 wherein the receptacle is subjected to acceleration forces by rotating the receptacle on a centrifuge.
Claim 10
Dependent Claim
19 words
A method as defined in claim 5 wherein the receptacle is subjected to at least 260 times gravitational acceleration.
Claim 11
Dependent Claim
70 words
In a method for manufacturing a motion sensitive detector having a pressure sensitive transducer mounted in a sealed cavity of a receptacle, and wherein said cavity is filled with acoustic transmission fluid, the improvement which comprises, subjecting said receptacle to acceleration forces in excess of gravity to cause air suspended in said acoustic transmission fluid to migrate to one end of said cavity prior to evacuating air from said cavity.
Claim 12
Dependent Claim
70 words
In a method for manufacturing a motion sensitive detector having a pressure sensitive transducer mounted in a sealed cavity of a receptacle, and wherein said cavity is filled with acoustic transmission fluid, the improvement which comprises, subjecting said receptacle to acceleration forces in excess of gravity to cause air suspended in said acoustic transmission fluid to migrate to one end of said cavity prior to evacuating air from said cavity.
Claim 13
Dependent Claim
23 words
A method as defined in claim 9 wherein said cavity is evacuated to at least a pressure of approximately 30 inches of mercury.
Claim 14
Dependent Claim
22 words
A method as defined in claim 9 wherein the receptacle is subjected to acceleration forces by rotating the receptacle on a centrifuge.
Claim 15
Dependent Claim
19 words
A method as defined in claim 9 wherein the receptacle is subjected to at least 260 times gravitational acceleration.
Claim 16
Independent Claim
111 words
A method of manufacturing a motion sensitive detector, which comprises the steps of: filling an open-ended receptacle with acoustic transmission fluid; placing a variable volume envelope in the cavity of the open-ended receptacle; placing at least one pressure sensitive transducer in the receptacle; enclosing the open-ended receptacle; subjecting the receptacle to acceleration forces in excess of gravity to form An air pocket at one end of said cavity; applying a vacuum to remove air from said air pocket in the receptacle; sealing said cavity; decreasing the volume of the envelope; and creating a void at one end of said cavity by subjecting said receptacle to acceleration forces in excess of gravity.
Claim 17
Independent Claim
111 words
A method of manufacturing a motion sensitive detector, which comprises the steps of: filling an open-ended receptacle with acoustic transmission fluid; placing a variable volume envelope in the cavity of the open-ended receptacle; placing at least one pressure sensitive transducer in the receptacle; enclosing the open-ended receptacle; subjecting the receptacle to acceleration forces in excess of gravity to form An air pocket at one end of said cavity; applying a vacuum to remove air from said air pocket in the receptacle; sealing said cavity; decreasing the volume of the envelope; and creating a void at one end of said cavity by subjecting said receptacle to acceleration forces in excess of gravity.
Claim 18
Dependent Claim
24 words
A method as defined in claim 13 wherein said cavity is evacuated to at least a negative pressure of approximately 30 inches of mercury.
Claim 19
Dependent Claim
22 words
A method as defined in claim 13 wherein the receptacle is subjected to acceleration forces by rotating the receptacle on a centrifuge.
Claim 20
Dependent Claim
19 words
A method as defined in claim 13 wherein the receptacle is subjected to at least 260 times gravitational acceleration.
Claim 21
Independent Claim
57 words
A method of manufacturing a motion sensitive detector, which comprises: filling a cavity of a receptacle with acoustic transmission fluid; locating a pressure sensitive transducer in the cavity at a position intermediate the ends thereof; forming an air pocket between said acoustic transmission fluid and one end of said cavity; and then evacuating air from the cavity.
Claim 22
Independent Claim
57 words
A method of manufacturing a motion sensitive detector, which comprises: filling a cavity of a receptacle with acoustic transmission fluid; locating a pressure sensitive transducer in the cavity at a position intermediate the ends thereof; forming an air pocket between said acoustic transmission fluid and one end of said cavity; and then evacuating air from the cavity.
Claim 23
Dependent Claim
27 words
A method as defined in claim 17 comprising the additional step of forming another void between the acoustic transmission fluid and the other end of said cavity.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |