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One of the first electric gates was invented by a Canadian Fred W. Watson in 1881. It was designed to be used for railway systems. [2] In 1884, a number of American newspapers reported that the French railway companies were about to adopt an electric gate opener.
Automatic Systems has been the first company to use the principle of the crankshaft rod (movement transmission by crankshaft-rod) in the development and manufacturing of automatic barriers and gates. [16] This system, already in use in numerous applications, has become a reference in access control equipment for many years ahead. [17]
Thailand's recovery from the 1997–1998 Asian financial crisis depended mainly on exports, among various other factors. As of 2012, the Thai automotive industry was the largest in Southeast Asia and the 9th largest in the world. [4] [5] [6] The Thailand industry has an annual output of near 1.5 million vehicles, mostly commercial vehicles. [6]
Chamberlain Group (CGI), the corporate parent company to LiftMaster, Chamberlain, Merlin, and Grifco, designs and engineers residential garage door openers, commercial door operators, security cameras, and gate entry systems.
When opening the door manually, the opener portion is still, so the opening is smooth and quiet. Permanently engaged—the motor driven mechanism (the opener portion) is always joined to the closer (if present) and to the door. When opening the door manually, the user is also driving the opener portion, so the opening is rough and noisy.
Nearly all state enterprises delivered higher profits in 2017. The State Enterprise Policy Office (SEPO) reported that the top five state enterprises by contributions to Thai government coffers in 2017 were the Government Lottery Office (GLO) at 30.9 billion baht, PTT Public Company Limited (PTT) at 26.3 billion, the Electricity Generating Authority of Thailand (EGAT) at 21.7 billion ...
An electric motor, geared down to get a lower speed and a higher torque, drives a pulley at one end of a belt. The door is clamped to the belt. To open the door, the motor turns the pulley, which in turn turns the belt, which in turn drags the door. To close the door, the reverse occurs.
PTT Public Company Limited or simply PTT (Thai: บริษัท ปตท. จำกัด (มหาชน)) is a Thai state-owned SET-listed oil and gas company. Formerly known as the Petroleum Authority of Thailand, it owns extensive submarine gas pipelines in the Gulf of Thailand, a network of LPG terminals throughout the kingdom, and it is involved in electricity generation ...