US3961327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audible alarm for a synchronous motor
Assignee: Duracell Inc USA
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Filing: 1974-07-22
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Granted: 1976-06-01
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Expires: 1994-07-22
Abstract
Abstract A buzzer arm is attached to a synchronous motor to provide an audible alarm in response to energization of a winding of the motor and the relative position of the buzzer arm to a buzzer anvil extending from the motor.
Inventors
- 👤 Ernest F. Kloenne
- 👤 Kanti D. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:06
CPC Classifications
G; G04; G04C; G04C21/00; G04C21/16; G04C21/18; H; H02; H02K; H02K1/00; H02K1/06; H02K1/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
In a synchronous motor having a rotor, a winding, and a set of stator poles, an audible alarm, comprising: a. a buzzer anvil electromagnetically connected to said stator poles projecting from said synchronous motor; and b. a bight-shaped magnetically-attractable buzzer arm carried by said motor juxtaposition to said buzzer anvil and intermittently engaging said buzzer anvil upon energization of said winding, whereby said engagement of said buzzer arm and said buzzer anvil produces a buzzing sound.
Claim 2
Dependent Claim
76 words
In a synchronous motor having a rotor, a winding, and a set of stator poles, an audible alarm, comprising: a. a buzzer anvil electromagnetically connected to said stator poles projecting from said synchronous motor; and b. a bight-shaped magnetically-attractable buzzer arm carried by said motor juxtaposition to said buzzer anvil and intermittently engaging said buzzer anvil upon energization of said winding, whereby said engagement of said buzzer arm and said buzzer anvil produces a buzzing sound.
Claim 3
Dependent Claim
42 words
The audible alarm as recited in claim 1 wherein said set of stator poles include an inner field stator pole member and an U-field stator pole member and said buzzer anvil is an integral part of said inner field stator pole member.
Claim 4
Dependent Claim
32 words
The audible alarm as recited in claim 1 wherein said anvil projects out from said synchronous motor in a direction substantially at a right angle to the rotational axis of said rotor.
Claim 5
Dependent Claim
21 words
The audible alarm as recited in claim 1 wherein said buzzer arm is mechanically attached to said synchronous motor with rivets.
Claim 6
Dependent Claim
21 words
The audible alarm as recited in claim 4 wherein said buzzer arm is attached to said synchronous motor by a weld.
Claim 7
Dependent Claim
21 words
The audible alarm as recited in claim 1 wherein said buzzer arm includes a follower projection for engaging a timing cam.
Claim 8
Dependent Claim
19 words
The audible alarm as recited in claim 6 wherein said follower projection is formed integrally with said buzzer arm.
Claim 9
Dependent Claim
22 words
The audible alarm as recited in claim 6 wherein said follower projection comprises a cylindrical-shaped pin fixedly carried by said buzzer arm.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |