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An inclinometer or clinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity's direction. It is also known as a tilt indicator , tilt sensor , tilt meter , slope alert , slope gauge , gradient meter , gradiometer , level gauge , level meter , declinometer , and pitch & roll ...
This is a chronological index for the start year for motor vehicle brands (up to 1969). For manufacturers that went on to produce many models, it represents the start date of the whole brand; for the others, it usually represents the date of appearance of the main (perhaps only) model that was produced.
Abney invented the "Abney level", a combined clinometer and spirit level, used by surveyors to measure slopes and angles. He was responsible for the " Abney mounting " of a concave grating spectrograph in which the photographic plate was fixed and the entry slit moved to accommodate different regions of the spectrum .
Car key in ignition Car ignition and steering wheel lock. A car key or an automobile key is a key used to open and/or start an automobile. Modern key designs are usually symmetrical, and some use grooves on both sides, rather than a cut edge, to actuate the lock.
The Abney level was invented by Sir William de Wiveleslie Abney (24 July 1843 – 3 December 1920) who was an English astronomer and chemist best known for his pioneering of color photography and color vision. Abney invented this instrument under the employment of the School of Military Engineering in Chatham, England, prior to late 1870. It is ...
The first cars were sold for $685, with additional reports of the car selling for $850 (or $17,741 to $22,014 adjusted for inflation in 2021). [ 1 ] [ 4 ] [ 3 ] Bus and truck manufacturing
Keyrings were invented in the 19th century by Samuel Harrison. [ 1 ] The most common form of the keyring is a single piece of metal in a 'double loop'. Either end of the loop can be pried open to allow a key to be inserted and slid along the spiral until it becomes wholly engaged onto the ring.
1959: The MOSFET (MOS transistor) is invented by the Egyptian Mohamed Atalla and the Korean Dawon Kahng at Bell Labs. It is used in almost all modern electronic products. It was smaller, faster, more reliable and cheaper to manufacture than earlier bipolar transistors, leading to a revolution in computers, controls and communication. [492] [493 ...