US3855787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment for the hands of a watch
Assignee: Gebrueder Junghans GmbH
•
Filing: 1973-03-23
•
Granted: 1974-12-24
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Expires: 1993-03-23
Abstract
Abstract An indicator hand, preferably for a watch, is mounted on a plastic attachment portion of a gear mechanism. The gear mechanism and an aperture portion of the hand are provided with projections which provide a firm engagement therebetween. The projections may be defined by axial grooves or by the edges of a slit which opens into the aperture.
Inventors
- 👤 F Assmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:23
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/04; G04B19/044
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
In a timepiece having a driven gear mechanism; and a hand drivingly mounted on said gear mechanism; said hand including wall means defining an aperture; and said gear mechanism including a plastic shaft firmly grippingly receiving the aperture Of the hand; the improvement wherein: said plastic shaft includes a plurality of radially extending and longitudinally oriented projections firmly gripping said aperture-defining wall means to effect a firm gripping engagement between said plastic shaft and said hand while affording alignment turning of said hand about said plastic shaft; said wall means including at least one slit opening into said aperture; an axially extending edge of said slit defining a projection engageable with said projections on said plastic portion.
Claim 2
Dependent Claim
117 words
In a timepiece having a driven gear mechanism; and a hand drivingly mounted on said gear mechanism; said hand including wall means defining an aperture; and said gear mechanism including a plastic shaft firmly grippingly receiving the aperture Of the hand; the improvement wherein: said plastic shaft includes a plurality of radially extending and longitudinally oriented projections firmly gripping said aperture-defining wall means to effect a firm gripping engagement between said plastic shaft and said hand while affording alignment turning of said hand about said plastic shaft; said wall means including at least one slit opening into said aperture; an axially extending edge of said slit defining a projection engageable with said projections on said plastic portion.
Claim 3
Dependent Claim
29 words
The watch according to claim 1 wherein said gear mechanism comprises an hour wheel; and said plastic shaft being tube-like and comprising an attachment portion of said hour wheel.
Claim 4
Dependent Claim
31 words
The watch according to claim 1 wherein said projections are defined by axially extending grooves, said grooves are defined by substantially smooth sidewalls extending at an angle of at least 90*.
Claim 5
Dependent Claim
32 words
The watch according to claim 1 wherein said wall means includes an axially extending bushing; said aperture extending through said bushing; and said at least one slit being formed in said bushing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |