Patent US3197879A successfully refreshed from Google Patents.
US3197879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gauge for locating the equator of a spherical cavity
Assignee: North American Aviation Corp
•
Filing: 1961-08-23
•
Granted: 1965-08-03
•
Expires: 1981-08-23
Abstract
No abstract record available.
Inventors
- 👤 Richard M Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:01
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/20; G01B5/08; G01C; G01C25/00; G01C25/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A GAUGE FOR DETERMINING THE DEVIATION OF A SURFACE OF A GAUGED MEMBER FROM THE POSITION OF THE TRUE EQUATOR OF A SPHERICAL CAVITY FORMED IN SAID MEMBER COMPRISING A STAND; A PLURALITY OF BALLS, DEFINING A PLANE FIXEDLY ATTACHED TO SAID STAND, SAID BALLS BEING ADAPTED TO BE CONTIGUOUS WITH THE SURFACE OF SAID GAUGED MEMBER; PLUNGER MEANS SLIDABLY SUPPORTED IN SAID STAND, SAID PLUNGER MEANS INCLUDING A PLURALITY OF BALLS FIXEDLY ATTACHED TO THE OUTER SURFACE THEREOF AND DEFINING A SPHERICAL SURFACE, SAID BALLS BEING ADAPTED TO CONTACT THE SIDES OF SAID SPHERICAL CAVITY; DETECTOR MEANS OPERATIVELY CONNECTED TO SAID PLUNGER MEANS FOR DETECTING MOTION OF SAID PLUNGER RELATIVE TO SAID STAND; AND INDICATOR MEANS RESPONSIVE TO THE OUTPUT OF SAID DETECTOR MEANS FOR INDICATING THE DISPLACEMENT OF SAID PLUNGER MEANS RELATIVE TO SAID SUPPORT STAND, WHEREBY SAID INDICATOR MEANS INDICATES DEVIATION OF THE FLAT SURFACE OF SAID MEMBER FROM THE EQUATOR POSITION OF SAID CAVITY.
Claim 2
Dependent Claim
158 words
A GAUGE FOR DETERMINING THE DEVIATION OF A SURFACE OF A GAUGED MEMBER FROM THE POSITION OF THE TRUE EQUATOR OF A SPHERICAL CAVITY FORMED IN SAID MEMBER COMPRISING A STAND; A PLURALITY OF BALLS, DEFINING A PLANE FIXEDLY ATTACHED TO SAID STAND, SAID BALLS BEING ADAPTED TO BE CONTIGUOUS WITH THE SURFACE OF SAID GAUGED MEMBER; PLUNGER MEANS SLIDABLY SUPPORTED IN SAID STAND, SAID PLUNGER MEANS INCLUDING A PLURALITY OF BALLS FIXEDLY ATTACHED TO THE OUTER SURFACE THEREOF AND DEFINING A SPHERICAL SURFACE, SAID BALLS BEING ADAPTED TO CONTACT THE SIDES OF SAID SPHERICAL CAVITY; DETECTOR MEANS OPERATIVELY CONNECTED TO SAID PLUNGER MEANS FOR DETECTING MOTION OF SAID PLUNGER RELATIVE TO SAID STAND; AND INDICATOR MEANS RESPONSIVE TO THE OUTPUT OF SAID DETECTOR MEANS FOR INDICATING THE DISPLACEMENT OF SAID PLUNGER MEANS RELATIVE TO SAID SUPPORT STAND, WHEREBY SAID INDICATOR MEANS INDICATES DEVIATION OF THE FLAT SURFACE OF SAID MEMBER FROM THE EQUATOR POSITION 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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |