Patent US5115288A successfully refreshed from Google Patents.
Patent US3694591A successfully refreshed from Google Patents.
US3694591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven timer with cam operated buzzer construction
Assignee: Duracell Inc USA
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Filing: 1971-05-14
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Granted: 1972-09-26
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Expires: 1991-05-14
Abstract
Abstract A compact motor driven timer for cooking stoves includes a dial plate carrying time markings with one or more hands rotatable relative thereto on a shaft rotatably mounted on a mechanism plate on which the dial plate is mounted. A plastic mechanism case encloses a gear train interconnecting a synchronous motor mounted on the case and the hand or hands. Shouldered portions of the case extend through the mechanism plate which has deformable ribs to hold the shouldered portions of the case and thereby the case itself in place. Screws extend through the case to secure it and the motor to the mechanism plate. The gear train includes one or more clutches to rotate an interval hand at different speeds. A buzzer arm is released to vibrate in the magnetic field of the motor at the end of the manually preset interval. Time indicating hands are also driven by the motor. The interval hand is concentrically mounted with the time indicating hands or is offset therefrom. A notch is provided in the mechanism case to hold the ends of the leads to the motor temporarily in position. The gear train also operates a range timer which includes contacts that are closed at the beginning of a variable time cycle to start a cooking operation at a preset time of day. The contacts are opened at the end of the preset time cycle. The range timer can be set for manual operation by manual closure of the contacts.
Inventors
- 👤 Ronald M Bassett
- 👤 Joseph F Gluth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:25
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/16; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19358; Y10T74/19367
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
372 words
A timer comprising: a dial plate carrying time interval markings, a mechanism plate mounting said dial plate, an interval shaft rotatably mounted on said mechanism plate and extending therethrough and through said dial plate, an interval hand on said interval shaft rotatable therewith relative to said time interval markings on said dial plate and manually settable with said shaft to a predetermined interval, a mechanism case mounted on the side of said mechanism plate away from said dial plate, an alternating current timing motor mounted on the side of said mechanism case away from said mechanism plate and having a magnetic field structure, a gear train having at least a part in said mechanism case and interconnecting said motor and said interval shaft, a buzzer arm mounted on said mechanism case and arranged to be vibrated by the magnetic field of said magnetic field structure, a cam follower connected to said buzzer arm, a cam on said interval shaft engaged by said cam follower for holding said buzzer arm in nonoperating position with respect to said magnetic field until the end of the interval for which the timer is set, a frame plate mounted on said mechanism plate in spaced relation thereto and endwise of said mechanism case, contact means mounted on the side of said frame plate away from said mechanism plate, contact operating means mounted on the side of said frame plate toward said mechanism plate, manually settable rotatable start time gear means mounted between said mechanism plate and said frame plate including a start time shaft extending through said mechanism plate and said dial plate for controlling, in part, operation of said contact operating means, manually settable rotatable cook hours gear means mounted between said mechanism plate and said frame plate including a cook hours shaft extending through said mechanism plate and said dial plate for controlling, in part, operation of said contact operating means, gearing interconnecting said start time gear means and said cook hours gear means, and gearing interconnecting said start time gear means and said gear train for shifting said contact means from one position to another position at the start of a preset time cycle and vice versa at the end of said time cycle.
Claim 2
Dependent Claim
372 words
A timer comprising: a dial plate carrying time interval markings, a mechanism plate mounting said dial plate, an interval shaft rotatably mounted on said mechanism plate and extending therethrough and through said dial plate, an interval hand on said interval shaft rotatable therewith relative to said time interval markings on said dial plate and manually settable with said shaft to a predetermined interval, a mechanism case mounted on the side of said mechanism plate away from said dial plate, an alternating current timing motor mounted on the side of said mechanism case away from said mechanism plate and having a magnetic field structure, a gear train having at least a part in said mechanism case and interconnecting said motor and said interval shaft, a buzzer arm mounted on said mechanism case and arranged to be vibrated by the magnetic field of said magnetic field structure, a cam follower connected to said buzzer arm, a cam on said interval shaft engaged by said cam follower for holding said buzzer arm in nonoperating position with respect to said magnetic field until the end of the interval for which the timer is set, a frame plate mounted on said mechanism plate in spaced relation thereto and endwise of said mechanism case, contact means mounted on the side of said frame plate away from said mechanism plate, contact operating means mounted on the side of said frame plate toward said mechanism plate, manually settable rotatable start time gear means mounted between said mechanism plate and said frame plate including a start time shaft extending through said mechanism plate and said dial plate for controlling, in part, operation of said contact operating means, manually settable rotatable cook hours gear means mounted between said mechanism plate and said frame plate including a cook hours shaft extending through said mechanism plate and said dial plate for controlling, in part, operation of said contact operating means, gearing interconnecting said start time gear means and said cook hours gear means, and gearing interconnecting said start time gear means and said gear train for shifting said contact means from one position to another position at the start of a preset time cycle and vice versa at the end of said time cycle.
Claim 3
Dependent Claim
51 words
The timer according to claim 1 wherein: an insulating contact housing is mounted on said frame plate, and said contact means includes: a pair of stationary contacts mounted on said contact housing, and a contact bar bodily movable on said housing into and out of bridging engagement with said stationary contacts.
Claim 4
Dependent Claim
84 words
The timer according to claim 2 wherein: an insulating contact slide is movable in a slot in said contact housing, carries said contact bar and has an arm extending through said frame plate into said contact operating means, a relatively weak coil compression spring in said contact slide biases said contact bar against said contact slide, and a relatively strong coil compression spring in said slot biases said contact slide and thereby said contact bar out of said bridging engagement with said stationary contacts.
Claim 5
Dependent Claim
72 words
The timer according to claim 1 wherein said contact operating means includes: a contact operating plate slidable on said frame plate, connected to said contact means, and shiftable by said start time means to move the same to said other position, and a control plate slidable on said contact operating plate, connected thereto through spring means, and shiftable by said cook hours means to move said contact means to said one position.
Claim 6
Dependent Claim
57 words
The timer according to claim 4 wherein said contact means includes: a movable contact member, and a contact spring biasing said contact member toward said other position, and said spring means interconnecting said contact operating and control plates is capable of moving said contaCt member toward said one position against the biasing action of said contact spring.
Claim 7
Dependent Claim
65 words
The timer according to claim 4 wherein: an inclined shoulder member is carried by said contact operating plate, means support said start time shaft for endwise movement, and an annular operating member on said start time shaft engages said inclined shoulder member on endwise movement of said start time shaft to shift said contact operating plate to move said contact means to said other position.
Claim 8
Dependent Claim
103 words
The timer according to claim 6 wherein: a first gear is rotatably mounted on said start time shaft and is driven at a constant speed by said motor through said gear train, a second gear is secured to and rotates with said start time shaft, a spring biases said start time shaft and said second gear toward said first gear and said annular operating number away from said inclined shoulder member, and means provide a driving connection between said first and second gears when said first gear is rotated to the preset start time position at the start of said preset time cycle.
Claim 9
Dependent Claim
99 words
The timer according to claim 4 wherein: a cam follower is carried by said control plate, and a cam is secured to and rotates with said cook hours shaft and has a cam surface engaging said cam follower to shift said control plate between said positions, said cam surface including a notch for holding said control plate with said contact means in said one position, a recessed section permitting said control plate and said contact means to shift to said other position, and a circular section for holding said control plate with said contact means in said one position.
Claim 10
Dependent Claim
143 words
The timer according to claim 7 wherein: a cam follower is carried by said control plate, a cam is secured to and rotates with said cook hours shaft and has a cam surface engaging said cam follower to shift said control plate between said positions, said cam surface including a notch for holding said control plate with said contact means in said one position, a recessed section permitting said control plate and said contact means to shift to said other position, and a circular section for holding said control plate with said contact means in said one position, a cook hours gear is secured to and rotates with said cook hours shaft and has gear teeth along a major portion of its periphery, and gear means interconnect said cook hours gear and said second gear at the start of said preset time cycle.
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |