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1921: Automatic Vacuum Wiper motor. 1923: Crescent Cleaner. 1927: Visionall® Wiper System. Two blade wiper system (a four blade system was also offered) where the blades wiped directly sideways. 1928: Sleet Wand. Early attempts to fight windshield icing included this use of a rock salt-type product encased in fabric and mounted on a wiper arm.
It is not possible to use a pointing machine to produce enlarged or reduced copies; the traditional instruments for this are a set of calipers or a three-dimensional version of the pantograph. [6] However, there is also a special version of the pointing machine that was used for mirroring, enlargements or reduced carving. [7]
Another wiper design (Fig. 6) is pantograph-based, used on many commercial vehicles, especially buses with large windscreens. Pantograph wipers feature two arms for each blade, with the blade assembly itself supported on a horizontal bar connecting the two arms. One of the arms is attached to the motor, while the other is on an idle pivot.
Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an iron-based alloy containing a minimum level of chromium that is resistant to rusting and corrosion. Stainless steel's resistance to corrosion results from the 10.5%, or more, chromium content which forms a passive film that can protect the material ...
The first bow collector was designed by the German engineer Walter Reichel in 1889 and shown at the World Expo in Paris the same year. [1] Reichel worked closely with Ernst Werner von Siemens, and with Siemens being a dominating force in the development of tramways in Europe, the bow collector quickly became the standard solution on the continent for collecting current.
A pantograph is a commonly used overhead suspension system for lamps and audio and video monitors in television studios. It is also used on a smaller scale in many photography studios. Using either motor driven cables or a spring system, the pantograph can be balanced so that a light touch can readjust the height of the load (usually a lamp).
A pantographic knife or paratrooper knife is a folding knife whose blade is opened by a unique scissors method. The blade has a slightly longer tang than a folding knife heel.
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