Search results
Results from the WOW.Com Content Network
Polaris Fashion Place is a two level shopping mall and surrounding retail plaza serving Columbus, Ohio, United States.The mall, owned locally by Washington Prime Group, is located off Interstate 71 on Polaris Parkway in Delaware County just to the north of the boundary between Delaware and Franklin County.
The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the 1970s. [6] [7] In 1980, the first automatic door using an infrared sensor was ...
NiSource was founded in 1912 as the Northern Indiana Public Service Company, which merged with several other companies to become the Columbia Gas and Electric Corporation. Under the Public Utility Holding Company Act of 1935 , Columbia was forced to reorganize its subsidiaries and eventually spun off its electric utilities, becoming the ...
Crown later decided to stop making so many one-of-a-kind trucks and developed two lines of E-Z Lift Trucks: an H series (hand-operated) and a B series (battery-operated). In 1959, when its lift trucks had annual sales of about $50,000, antenna rotators had annual sales of $700,000, [9] but the transition to the lift truck business was under way ...
An electric current typically energizes the electromagnet to attract and hold the steel plate, keeping the door open. Unlike electromagnetic locks , the magnetic attraction of an electromagnetic door holder is usually weak enough that it can be manually overpowered at any time by anyone, allowing the door to close.
The sliding plug door was introduced experimentally by P.F.E. (Pacific Fruit Express) in April 1947, when one of their R-40-10 series cars, #42626, was equipped with one. P.F.E.'s R-40-26 series reefers, designed in 1949 and built in 1951, were the first production series cars to be so equipped. In addition, the Santa Fe Railroad first used ...
Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]
Some sliding doors run on a wall-mounted rail, like this one Sliding doors in a modern wardrobe. The 'top-hung' system is most often used. The door is hung by two trolley hangers at the top of the door running in a concealed track; all the weight is taken by the hangers, making the door easier to move.