Patent US3721010A successfully refreshed from Google Patents.
US3721010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial indicator gage
Assignee: Individual
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Filing: 1971-02-08
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Granted: 1973-03-20
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Expires: 1991-02-08
Abstract
Abstract Gage to measure depth of bore or thickness of workpiece, etc. Diametrically projecting, spring-urged contact stem transverses cylindrical housing which has rotatable inner sleeve with internal ring gear. Rack teeth on stem engaged by one or more intermediate gears which drive ring gear and turn sleeve which carries dial indicator relative to overlying stationary pointer, the zero setting of which can be changed however to indicate desired standard for workpiece. Gear train and diametrically large dial face produce very high accuracy.
Inventors
- 👤 H Ristow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:12
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/22; G01B3/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A measuring gage of the character described, comprising in combination: a housing structure providing a generally annular guideway, a stem reciprocably mounted in said structure and disposed generally diametrically to said guideway, with a work-contact end selectively projectable therebeyond, a length of said stem which is encompassed by said housing having rack teeth, a sleeve rotatably disposed about said annular guideway, the sleeve forming a ring gear and fixedly carrying an indicator dial, and intermediate gear means operatively connecting the rack teeth of said stem with said ring gear, whereby longitudinal movement of the stem serves to rotate said indicator dial.
Claim 2
Dependent Claim
101 words
A measuring gage of the character described, comprising in combination: a housing structure providing a generally annular guideway, a stem reciprocably mounted in said structure and disposed generally diametrically to said guideway, with a work-contact end selectively projectable therebeyond, a length of said stem which is encompassed by said housing having rack teeth, a sleeve rotatably disposed about said annular guideway, the sleeve forming a ring gear and fixedly carrying an indicator dial, and intermediate gear means operatively connecting the rack teeth of said stem with said ring gear, whereby longitudinal movement of the stem serves to rotate said indicator dial.
Claim 3
Dependent Claim
23 words
The measuring gage of claim 1 which additionally has resilient means for normally holding the work-contact end of said stem in projected position.
Claim 4
Dependent Claim
34 words
The measuring gage of claim 1 wherein said rotatable sleeve and dial are journalled on an axially disposed shaft wIthin the housing structure, which shaft fixedly supports a pointer alignable with said indicator dial.
Claim 5
Dependent Claim
41 words
The measuring gage of claim 1 wherein said housing structure carries a pointer selectively rotatable concentric to said indicator dial whereby the pointer can be set at any desired zero position corresponding to a standard used for comparison with a workpiece.
Claim 6
Dependent Claim
42 words
The measuring gage of claim 1 wherein said intermediate gear means consists of a single gear disposed within said housing and mutually engaging the rack teeth and ring gear, which rack teeth and ring gear are axially separated relative to said housing.
Claim 7
Dependent Claim
50 words
The measuring gage of claim 1 wherein said intermediate gear means comprise a gear train disposed within said housing between the rack teeth and ring gear and adapted to multiply the linear movement of the stem in transmitting it to the annular movement of the ring gear and indicator dial.
Claim 8
Dependent Claim
21 words
The measuring gage of claim 6 wherein said stem carries indicia for indicating each corresponding complete rotation of the indicator dial.
Claim 9
Dependent Claim
41 words
The measuring gage of claim 7 wherein said housing structure carries a pointer selectively rotatable concentric to said indicator dial, whereby the pointer can be set at any desired zero position corresponding to a standard used for comparison with a workpiece.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |