US3774127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor timer
Assignee: Idec Corp
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Filing: 1972-08-07
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Granted: 1973-11-20
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Expires: 1992-08-07
Abstract
Abstract A motor timer comprising a casing, an electromagnet disposed within the casing, an instantaneous switch and a timing switch disposed on opposite sides of the electromagnet within the casing, an actuating member extending laterally above the electromagnet and operatively connected to a movable core associated with the electromagnet, spring means normally urging the actuating member away from the electromagnet, a timing gear operatively connected to a motor through a reduction gearing and a clutch unit, and a locking lever extending vertically above the timing switch for normally maintaining the timing switch in the locked position. The instantaneous switch can be immediately actuated in response to the energization of the electromagnet, while the timing gear acts to trip the locking lever with predetermined timing while rotation for unlocking the timing switch from its locked position so that the timing switch can be actuated for timing operation.
Inventors
- 👤 T Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:37
CPC Classifications
G; G04; G04F; G04F3/00; G04F3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
A motor timer comprising a casing, an electromagnet disposed at a lower central position within said casing, an instantaneous switch and a timing switch disposed on opposite sides of said electromagnet within said casing, an actuating member extending laterally above said electromagnet and operatively connected to a movable core associated with said electromagnet said instantaneous switch being adapted to be immediately actuated by said actuating member in reponse to the energization of said electromagnet, spring means normally urging said actuating member away from said electromagnet, an electric motor disposed at an upper position within said casing and cooperatively associated with said electromagnet, a timing gear adapted to be operatively connected to said motor through a reduction gearing and a clutch unit, said clutch unit being adapted to be immediately actuated by said actuating member in response to the energization of said electromagnet to operatively connect said timing gear to said motor through said reduction gearing to thereby rotate said timing gear, and a locking lever extending vertically above said timing switch within said casing for normally maintaining said timing switch in the locked position, where-by said locking lever being actuated by said timing gear after a predetermined lapse of time from the actuation of said timing gear to unlock said timing switch from its locked position so that said timing switch is actuated for timing operation.
Claim 2
Dependent Claim
226 words
A motor timer comprising a casing, an electromagnet disposed at a lower central position within said casing, an instantaneous switch and a timing switch disposed on opposite sides of said electromagnet within said casing, an actuating member extending laterally above said electromagnet and operatively connected to a movable core associated with said electromagnet said instantaneous switch being adapted to be immediately actuated by said actuating member in reponse to the energization of said electromagnet, spring means normally urging said actuating member away from said electromagnet, an electric motor disposed at an upper position within said casing and cooperatively associated with said electromagnet, a timing gear adapted to be operatively connected to said motor through a reduction gearing and a clutch unit, said clutch unit being adapted to be immediately actuated by said actuating member in response to the energization of said electromagnet to operatively connect said timing gear to said motor through said reduction gearing to thereby rotate said timing gear, and a locking lever extending vertically above said timing switch within said casing for normally maintaining said timing switch in the locked position, where-by said locking lever being actuated by said timing gear after a predetermined lapse of time from the actuation of said timing gear to unlock said timing switch from its locked position so that said timing switch is actuated for timing operation.
Claim 3
Dependent Claim
159 words
A motor timer as claimed in claim 1, wherein said actuating member operatively connected to said movable core is disposed so that one end thereof is opposite to an actuator of said instantaneous switch and the other end thereof is opposite to an actuator of said timing switch, and said locking lever is pivotally supported at a substantially intermediate portion thereof in a manner so that one end of said locking lever normally engages with said actuator of said timing switch so as to maintain said timing switch in the locked position and the other end of said locking lever is disposed to be urged in one direction with the rotation of said timing gear after said predetermined lapse of time from the actuation of said timing gear to release said actuator of said timing switch from the engagement with said one end of said locking lever to thereby enable said timing switch to become in the unlock position.
Claim 4
Dependent Claim
179 words
A motor timer as claimed in claim 1, said clutch unit including a first transmission gear having a central axis opening and a clutch portion, said first transmission gear being in meshing engagement with one of the gears in said reduction gearing driven by said motor, a second transmission gear having a clutch portion opposite to the clutch portion of said first transmission gear and a first and a second shaft extending in opposite directions therefrom, said second transmision gear being in meshing engagement with said timing gear, said first shaft extending through said opening in said first transmission gear to abut at the lower end thereof with a portion of said actuating member normally urged away from said electromagnet by said spring means, and a spring engaging said second shaft for normally urging said second transmission gear toward said first transmission gear with a force smaller than that of said spring means, whereby said clutch portions of said first and second transmission gears can be brought into frictional engagement when said movable core is attracted by said electromagnet.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |