US3815430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A reversible, frictional drive assembly
Assignee: Olympia Werke AG
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Filing: 1973-06-04
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Granted: 1974-06-11
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Expires: 1993-06-04
Abstract
Abstract A gear driving assembly for selectively driving a wheel in the forward and reverse directions, including a forward stepped friction gear and a reverse stepped friction gear each disposed on its own support member, which is pivotable about a respective bearing point, and control apparatus operatively associated with the support members to selectively cause each of the friction gears to be separately pivoted into engagement with the wheel. The bearing points are arranged such that the friction gears can be pivoted into engagement with each other. A spring is connected between the support members to urge the friction gears out of engagement with each other. When the wheel is to be driven in the forward direction, however, the control apparatus provides a sufficient force to overcome the force of the spring and cause the friction gears to be pivoted into engagement. This arrangement of the friction gears, the respective support members and the spring forms a closed chain of links when the wheel is to be driven in the forward direction and an open chain when the wheel is to be driven in the reverse direction or is in a stop position.
Inventors
- 👤 R Strobel
- 👤 P Frerichs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/26; G01; G01D; G01D15/00; G01D15/24; G11B25/00; G11B25/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
285 words
In a gear driving assembly arranged in an instrument housing for selectively driving a wheel in the forward and reverse directions, the assembly comprising a motor, two pivotal support members each pivotally mounted on a respective bearing point and each having two arms joined at the respective bearing point, forward and reverse stepped friction gears each disposed on a rotatable axis on one arm of a respective pivot support member and capable of being pivoted into contact with the wheel to be driven, control means operatively associated with said support members for selectively causing each friction gear to be separately pivoted into contact with the wheel, a drive belt connected between the motor and one of the stepped friction gears, a spring connected between the support members, the improvement wherein: said bearing points are arranged in a spaced relationship such that said friction gears can be selectively pivoted into engagement with each other; said spring is connected between one of said arms of said reveRse gear support member and one of said arms of said forward gear support member for providing a force in a direction causing said friction gears to be pivoted away from each other; said control means provides a sufficient force to overcome the force of said spring and cause said friction gears to become engaged with each other when the wheel is to be driven in the forward direction, whereby said friction gears, said respective support member and said spring form a closed chain of links when the wheel is to be driven in a forward direction and form an open chain of links when the wheel is to be driven in a reverse direction and when the wheel is stopped.
Claim 2
Dependent Claim
285 words
In a gear driving assembly arranged in an instrument housing for selectively driving a wheel in the forward and reverse directions, the assembly comprising a motor, two pivotal support members each pivotally mounted on a respective bearing point and each having two arms joined at the respective bearing point, forward and reverse stepped friction gears each disposed on a rotatable axis on one arm of a respective pivot support member and capable of being pivoted into contact with the wheel to be driven, control means operatively associated with said support members for selectively causing each friction gear to be separately pivoted into contact with the wheel, a drive belt connected between the motor and one of the stepped friction gears, a spring connected between the support members, the improvement wherein: said bearing points are arranged in a spaced relationship such that said friction gears can be selectively pivoted into engagement with each other; said spring is connected between one of said arms of said reveRse gear support member and one of said arms of said forward gear support member for providing a force in a direction causing said friction gears to be pivoted away from each other; said control means provides a sufficient force to overcome the force of said spring and cause said friction gears to become engaged with each other when the wheel is to be driven in the forward direction, whereby said friction gears, said respective support member and said spring form a closed chain of links when the wheel is to be driven in a forward direction and form an open chain of links when the wheel is to be driven in a reverse direction and when the wheel is stopped.
Claim 3
Dependent Claim
56 words
An arrangement as defined in claim 1 wherein said spring is a tension spring having a first end attached to the other of said arms of said support member associated with said forward friction gear and a second end attached to said one of said arms of said support member associated with said reverse friction gear.
Claim 4
Dependent Claim
85 words
An arrangement as defined in claim 1 wherein said control means includes two separately actuatable relay switches, two tension springs each connected between a respective one of said relay switches and the other of said arms of a respective support member, each of said other arms having a bore, the distance between the bore and the respective bearing point being different for each said other arm, each of said springs associated with said relay switches being attached in the bore of a respective other arm.
Claim 5
Dependent Claim
74 words
An arrangement as defined in claim 1 wherein said motor has a drive gear around which said belt is arranged and said drive gear having its axis of rotation disposed on a line extending between the center points of said bearing point of said support member associated with said reverse friction gear and of said rotatable axis on which said reverse friction gear is disposed, when said friction gears are in the stop position.
Claim 6
Dependent Claim
74 words
An arrangement as defined in claim 1 wherein when the wheel is to be driven in a forward direction said control means causes said reverse gear to be pivoted away from the wheel, and further comprising a resilient abutment adjustably disposed in the instrument housing to operatively engage said support member associated with said reverse friction gear to limit the pivotal movement of said reverse friction gear away from the wheel to be driven.
Claim 7
Dependent Claim
42 words
An arrangement as defined in claim 1 further comprising eccentric mounting means, wherein said support members are pivotally mounted at said respective bearing points on said eccentric mounting means permitting the location of each of said bearing points to be separately adjusted.
Claim 8
Dependent Claim
20 words
An arrangement as defined in claim 1 wherein the wheel to be driven is a turntable of a dictating machine.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |