| 摘要 |
<p>1,020,119. Supply systems for electric blankets; protective systems. GENERAL ELECTRIC CO. April 8, 1964 [April 30, 1963], No. 14468/64. Headings H2H and H2K. [Also in Divisions H1 and H5] The heater 9 of an electric blanket (see Division H5) is supplied with electric power from an A.C. outlet by way of a plug 28, relay contacts 40, a safety switch 38 and a conventional control 33 to 36 responsive to ambient temperature. The relay 43 operating the contacts 40 has windings 44, 45 which are associated with a temperature sensor cable 10 (see Division H1) located within the electric blanket. The arrangement is such that the relay 43 is deenergized to open contacts 40 when local overheating occurs in the blanket. The relay circuit includes a semi-conductor device 53 so that the relay operates on A.C. without hum. The control circuit includes an " on " switch 54, an " off " switch 55, a safety switch 38 linked to the switch 54, and an indicator lamp 56.</p> |
