US3654853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic electrical connector for a food preparation system
Assignee: 3M Co
•
Filing: 1968-11-14
•
Granted: 1972-04-11
•
Expires: 1988-11-14
Abstract
Abstract This invention is directed to magnetic electric connectors. Each connector is composed of at least two units. The first unit is comprised of a nonconductive permanent magnet partially encased by electrically conductive contact plates bonded or form fitted to the magnet. The second unit may be of similar construction or conversely comprise a magnetically permeable electrically conductive platen of desired configuration. When connected, the contact plates of two similar units or the contact plates of one unit and the magnetically permeable platen contact each other and act as electrical conductors. The units are held together by magnetic attraction. The juncture of the plates or the platen and plates forms an electrically conductive connection so that current from a power source connected to one unit can pass to a load connected to the other unit. Either or both units can be integrally formed with electrical appliances, devices, etc.
Inventors
- 👤 Richard E Fayling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:37
CPC Classifications
A; A47; A47J; A47J39/00; A47J39/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
238 words
A food preparation system having a magnetic electrical connector associated therewith comprising: a. a heating chamber having a hollow interior and electric plug means extending to the interior of said chamber connected to a source of electrical energy; b. a rack removably mounted in said hollow chamber having electric circuit means engagable with said plug means and a plurality of pan members slidably mounted on said rack; c. a plurality of insulated supporting rails mounted on said rack in spaced relationship with said slidable pan members; d. a nonconductive permanent magnet laminated between electrically conductive metallic contact plates mounted on each of said rails, said contact plates interconnected with the electric circuit means of the said rack; e. a plurality of food containing casseroles removably mounted in said pan members for slidable engagement over the contact plates of said rails, each of said casseroles having an electrical heating element integrally associated with the bottom wall thereof; and f. a pair of electrically conductive magnetically permeable platens connected with the heating element of each casserole integrally formed with and extending from the bottom wall of each casserole, said platens magnetically attracted by the magnets of said rails into contact with said contact plates for securing each casserole to said rails and interconnecting said heating element with said contact plates for electrically energizing said heating element upon the application of electric energy to the electric circuit means of said rack.
Claim 2
Dependent Claim
238 words
A food preparation system having a magnetic electrical connector associated therewith comprising: a. a heating chamber having a hollow interior and electric plug means extending to the interior of said chamber connected to a source of electrical energy; b. a rack removably mounted in said hollow chamber having electric circuit means engagable with said plug means and a plurality of pan members slidably mounted on said rack; c. a plurality of insulated supporting rails mounted on said rack in spaced relationship with said slidable pan members; d. a nonconductive permanent magnet laminated between electrically conductive metallic contact plates mounted on each of said rails, said contact plates interconnected with the electric circuit means of the said rack; e. a plurality of food containing casseroles removably mounted in said pan members for slidable engagement over the contact plates of said rails, each of said casseroles having an electrical heating element integrally associated with the bottom wall thereof; and f. a pair of electrically conductive magnetically permeable platens connected with the heating element of each casserole integrally formed with and extending from the bottom wall of each casserole, said platens magnetically attracted by the magnets of said rails into contact with said contact plates for securing each casserole to said rails and interconnecting said heating element with said contact plates for electrically energizing said heating element upon the application of electric energy to the electric circuit means of said rack.
Claim 3
Dependent Claim
33 words
The food preparation system of claim 1 in which said platens extending from the bottom wall of said casseroles scrape said contact plates when moved in slidable engagement thereover by said pan members.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |