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Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]
As a result of the lack of a competitive firearms market in Sweden, Interdynamic AB set up a subsidiary in the United States to sell the KG-9. Called Interdynamic USA, this company eventually became Intratec when George Kellgren left the company and Carlos Garcia renamed it Intratec, and continued to sell variants of KG-99, later known as the ...
The most common type was the so-called cat's whisker detector, which consisted of a piece of crystalline mineral, usually galena (lead sulfide), with a fine wire touching its surface. [1] [4] [5] The "asymmetric conduction" of electric current across electrical contacts between a crystal and a metal was discovered in 1874 by Karl Ferdinand ...
Acme explosive tennis balls, an Acme product as seen in the Wile E. Coyote and the Road Runner cartoon Soup or Sonic. The Acme Corporation is a fictional corporation that features prominently in the Road Runner/Wile E. Coyote animated shorts as a running gag.
The following partial list contains marks which were originally legally protected trademarks, but which have subsequently lost legal protection as trademarks due to abandonment, non-renewal or improper issuance (the generic term predated the registration).
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Allen-Bradley is the brand-name of a line of factory automation equipment owned by Rockwell Automation.The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers (), human-machine interfaces, sensors, safety components and systems, software, drives and drive systems, contactors, motor control centers, and systems of such products.
The Kit-Cat Klock is an art deco novelty wall clock shaped like a grinning cat with cartoon eyes that swivel in time with its pendulum tail. It is traditionally black, but models in other colors and styles are also available. It is a common symbol of kitchens in North American popular culture. [1]