US3742160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas circulating and timer means with magnetic coupling drive means for cam actuated switches
Assignee: Duracell Inc USA
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Filing: 1972-03-10
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Granted: 1973-06-26
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Expires: 1992-03-10
Abstract
Abstract A shaft extends through a motor. A fan is carried on one end of the shaft and on the other end a magnet. A rotor is spaced from and in axial alignment with the magnet. A second magnet is carried by the rotor juxtaposition the first magnet such that the motor, when operating, rotates the fan and the first magnet, the first magnet causing rotation of the second magnet and thereby the rotor. A cam means which operates switch means is coupled to the rotor.
Inventors
- 👤 S Murray
- 👤 M Schuder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
G; G04; G04F; G04F3/00; G04F3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A gas circulating and timer means comprising: a. a motor drive means including a rotatable shaft extending through said motor, b. a fan carried at one end of said shaft, c. a first magnet carried at the other end of said shaft, d. a rotor spaced from said first magnet, e. said rotor including a second magnet juxtaposition said first magnet, f. speed reduction means coupled to said rotor, g. cam means coupled to said speed reduction means, and switch means responsive to rotation of said cam means.
Claim 2
Dependent Claim
88 words
A gas circulating and timer means comprising: a. a motor drive means including a rotatable shaft extending through said motor, b. a fan carried at one end of said shaft, c. a first magnet carried at the other end of said shaft, d. a rotor spaced from said first magnet, e. said rotor including a second magnet juxtaposition said first magnet, f. speed reduction means coupled to said rotor, g. cam means coupled to said speed reduction means, and switch means responsive to rotation of said cam means.
Claim 3
Dependent Claim
48 words
A gas circulating and timer means according to claim 1 wherein said first and second magnets are circular discs each having an even number of poles of alternate north and south polarity, said poles of one of said magnets facing said poles of the other of said magnets.
Claim 4
Dependent Claim
52 words
A gas circulating and timer means according to claim 1 wherein said cam means includes a single constant rise cam and said switch means includes a blade having electrical contacts on opposed sides thereof, said blade movable between two spaced fixed blades having electrical contacts cooperating with the first named electrical contacts.
Claim 5
Dependent Claim
29 words
A gas circulating and timer means according to claim 3 wherein said blades are cantilevered at one end and wherein spacer means maintains said blades separated a predetermined distance.
Claim 6
Dependent Claim
33 words
A gas circulating and timer means according To claim 1 wherein said speed reducing means includes clutch means and means coupled to said speed reducing means permitting manual setting of said timer means.
Claim 7
Dependent Claim
53 words
A gas circulating and timer means according to claim 5 wherein said speed reducing means comprises a gear train coupling said cam means to said rotor, said means permitting manual setting includes a shaft carrying said cam means, and said clutch means comprises a spring-biased gear coupling said shaft to said gear train.
Claim 8
Dependent Claim
69 words
In a timer wherein a cam means selectively opens and closes switch means in response to motor driven rotation of said cam means, means coupling said cam means to a motor comprising a first magnet coupled to said motor, a second magnet coupled to said cam means such that motor driven rotation of said first magnet causes rotation of said second magnet to cause rotation of said cam means.
Claim 9
Dependent Claim
69 words
In a timer wherein a cam means selectively opens and closes switch means in response to motor driven rotation of said cam means, means coupling said cam means to a motor comprising a first magnet coupled to said motor, a second magnet coupled to said cam means such that motor driven rotation of said first magnet causes rotation of said second magnet to cause rotation of said cam means.
Claim 10
Dependent Claim
43 words
In a timer according to claim 7 wherein each of said first and second magnets have an even number of poles of alternate north and south polarities, said poles of one of said magnets facing said poles of the other of said magnets.
Claim 11
Dependent Claim
103 words
In combination, a timer wherein a cam means selectively opens and closes switch means, and a motor applying power driven rotation to said cam means through speed reducing means connected between said motor and said cam means, said timer and said motor each enclosed in separate housings, means maintaining said housings in spaced relation, first magnetic coupling means coupled to said motor and disposed wholly within said motor housing, second magnetic coupling means coupled to said cam means and disposed wholly within said timer housing, said first and second magnetic coupling means cooperating to operationally couple said motor to said speed reducing means.
Claim 12
Dependent Claim
103 words
In combination, a timer wherein a cam means selectively opens and closes switch means, and a motor applying power driven rotation to said cam means through speed reducing means connected between said motor and said cam means, said timer and said motor each enclosed in separate housings, means maintaining said housings in spaced relation, first magnetic coupling means coupled to said motor and disposed wholly within said motor housing, second magnetic coupling means coupled to said cam means and disposed wholly within said timer housing, said first and second magnetic coupling means cooperating to operationally couple said motor to said speed reducing means.
Claim 13
Dependent Claim
16 words
The combination according to claim 9 wherein said first and second coupling means include permanent magnets.
Claim 14
Dependent Claim
27 words
The combination according to claim 9 further including speed reducing means disposed within said timer housing and coupled between said cam means and said second coupling means.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |