Patent US3766655A successfully refreshed from Google Patents.
US3766655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-measuring instrument for bores and the like having self-centering means in addition to the movable probe
Assignee: Individual
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Filing: 1971-02-24
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Granted: 1973-10-23
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Expires: 1991-02-24
Abstract
Abstract An internal-measuring instrument for measuring the internal diameter of bores and the like in which an upright spindle rotates a threaded member to drive a movable probe against the wall of a bore while bringing a fixed body into abutment with the diametrically opposite portion of the wall. Replaceable springloaded arms on the stationary body form outriggers therefore to center the device automatically by a three-part system. The displacement of the movable probe is registered on the barrel of the instrument to indicate the measured dimensions.
Inventors
- 👤 A Cho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:54
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/08; G01B5/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
313 words
An internal measuring instrument for the measurement of the internal diameter of an opening, comprising: a. A probe housing of generally L-configuration having a leg and a barrel extending perpendicularly to said leg, said leg being formed with a bore; b. a first probe axially shiftable in said bore and engageable with a wall of said opening at one side thereof; c. a spindle rotatable in said barrel; d. transmission means in said housing operatively connecting said spindle with Said first probe for axially shifting said first probe relatively to said housing in the direction of said side of said opening, said housing being formed with a second probe diametrically opposite said first probe and engageable with an opposite side of said housing; e. indicating means on said housing cooperating with said spindle for registering displacement of said first probe; f. a guide on said leg axially shiftable parallel to the direction of displacement of said first probe; g. a first arm extending transverse to said direction and mounted on said guide for displacement in said direction, said first arm being formed with rollers engageable with the wall of said opening; h. first spring means on said housing yieldably biasing said arm in a direction opposite to the direction of displacement of said first probe; and i. an extension probe removably and replaceably mounted on said housing along a side thereof opposite said first probe, said extension probe including a body detachably affixed to said housing in line with said other probe and engageable with said opposite side of said opening, a second guide axially shiftable on said body in said direction, a second arm extending transversely to said direction and having free extremities engageable with the wall of said opening for centering the instrument relative thereto, and second spring means on said body for biasing said second arm in said opposite direction.
Claim 2
Dependent Claim
313 words
An internal measuring instrument for the measurement of the internal diameter of an opening, comprising: a. A probe housing of generally L-configuration having a leg and a barrel extending perpendicularly to said leg, said leg being formed with a bore; b. a first probe axially shiftable in said bore and engageable with a wall of said opening at one side thereof; c. a spindle rotatable in said barrel; d. transmission means in said housing operatively connecting said spindle with Said first probe for axially shifting said first probe relatively to said housing in the direction of said side of said opening, said housing being formed with a second probe diametrically opposite said first probe and engageable with an opposite side of said housing; e. indicating means on said housing cooperating with said spindle for registering displacement of said first probe; f. a guide on said leg axially shiftable parallel to the direction of displacement of said first probe; g. a first arm extending transverse to said direction and mounted on said guide for displacement in said direction, said first arm being formed with rollers engageable with the wall of said opening; h. first spring means on said housing yieldably biasing said arm in a direction opposite to the direction of displacement of said first probe; and i. an extension probe removably and replaceably mounted on said housing along a side thereof opposite said first probe, said extension probe including a body detachably affixed to said housing in line with said other probe and engageable with said opposite side of said opening, a second guide axially shiftable on said body in said direction, a second arm extending transversely to said direction and having free extremities engageable with the wall of said opening for centering the instrument relative thereto, and second spring means on said body for biasing said second arm in said opposite direction.
Claim 3
Dependent Claim
40 words
The instrument defined in claim 1 wherein said free ends of said second arm are provided with respective pressure rollers, said body being formed at its end engageable with said other side of said opening with an eccentrically journaled row.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |