US4487115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toaster
Assignee: Individual
•
Filing: 1983-07-13
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Granted: 1984-12-11
•
Expires: 2003-07-13
Abstract
Abstract A toaster comprising a rotating shaft mounted in a toaster case having two openings and covers for the openings, the shaft being mounted for limited rotation and operated by an electromagnetic actuator to move the covers between open and closed positions, each cover provided with a trapezoidal metal net frame for receiving the bread. An electronic circuit system for operating the toaster comprises a timer, temperature switch and triggers to control the heating time and magnetic actuator which drives the rotating shaft to move the covers and bread frames out or in.
Inventors
- 👤 Cheng-Hsiung Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:41
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/08; A47J37/0814; A47J37/0842
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
240 words
An electric toaster to uniformaly toast bread comprising: a hollow case; heating elements within said case; two openings through the side of said case; a cover for each opening; a shaft rotatably mounted on said case and attached to said covers so that rotation of said shaft moves said covers between open and closed positions; trapezoidal metal frames for receiving and holding slices of bread mounted on said covers so that when said covers are open said frames are disposed outside said case and when said covers are closed said frames are disposed within said case adjacent said heating elements; an electromagnetic actuator operatively connected to said shaft to selectively rotate said shaft when energized to move said covers into the open or closed positions; and an electronic circuit system for automatically controlling the heating time and toasting comprising, a connector to a power source, a touch control switch mounted to the case and operatively connected between said power source connector and said heating elements to energize said heating elements, a timer operatively connected in the heating element circuit to control the time of energization of said heating elements, a time adjustment means operatively connected in the timer circuit to selectively set the operation of the timer, and a thermal actuated switch operatively connected in the timer circuit to energize the timer at a pre-set temperature, said electromagnetic actuator being operatively connected in said timer circuit to be operated thereby.
Claim 2
Dependent Claim
240 words
An electric toaster to uniformaly toast bread comprising: a hollow case; heating elements within said case; two openings through the side of said case; a cover for each opening; a shaft rotatably mounted on said case and attached to said covers so that rotation of said shaft moves said covers between open and closed positions; trapezoidal metal frames for receiving and holding slices of bread mounted on said covers so that when said covers are open said frames are disposed outside said case and when said covers are closed said frames are disposed within said case adjacent said heating elements; an electromagnetic actuator operatively connected to said shaft to selectively rotate said shaft when energized to move said covers into the open or closed positions; and an electronic circuit system for automatically controlling the heating time and toasting comprising, a connector to a power source, a touch control switch mounted to the case and operatively connected between said power source connector and said heating elements to energize said heating elements, a timer operatively connected in the heating element circuit to control the time of energization of said heating elements, a time adjustment means operatively connected in the timer circuit to selectively set the operation of the timer, and a thermal actuated switch operatively connected in the timer circuit to energize the timer at a pre-set temperature, said electromagnetic actuator being operatively connected in said timer circuit to be operated thereby.
Claim 3
Dependent Claim
66 words
A toaster as claimed in claim 1 and further comprising: two triggers; and a TRIAC; one of said triggers being operatively connected in the circuit to control the TRIAC which is in the heater circuit, and the other trigger being operatively connected in the circuit of the electromagnetic actuator, to control the input from the power source to the heating elements and said electromagnetic actuator, respectively.
Claim 4
Dependent Claim
16 words
A toaster as claimed in claim 1 wherein said timer adjustment means comprises a variable resistor.
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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |