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Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow. An attacker with an appropriate receiver could discover the code word and use it to gain access sometime later. More sophisticated remote control systems use a rolling code (or hopping code) that changes for every use.
The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
Remote keyless entry fobs emit a radio frequency with a designated, distinct digital identity code. Inasmuch as "programming" fobs is a proprietary technical process, it is typically performed by the automobile manufacturer. In general, the procedure is to put the car computer in 'programming mode'.
Cover of 1922 Sears Modern Homes catalog. Sears Modern Homes were houses sold primarily through mail order catalog by Sears, Roebuck and Co., an American retailer.. From 1908 to 1942, Sears sold more than 70,000 of these houses in North America, by the company's count. [1]
Sectional garage door Up-and-over garage door Garage Door Hardware. A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or ...
Owned by Sears Roebuck, WLS would come to stand for the World's Largest Store. Sears ran broadcasts from WMAQ studios as WBBX in March 1924. WES tests were conducted 9 to 11 April 1924. WLS would begin on 12 April and became one of 25 original 50,000 watt "Clear Channel" system stations; Originally AM 870 kHz, AM 890 kHz Class-A 6WF: 720 ABC Perth
This was the lone holdout of dramatic programming, which ran from 1974 to 1982, though shorter runs were given to the General Mills Radio Adventure Theater, The Zero Hour and the Sears/Mutual Radio Theater in the 1970s – early 1980s; otherwise, most new dramatic radio was carried on public and to some extent religious stations. [91]
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