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Robert Andrew Hingson (April 13, 1913 – October 9, 1996) was an American physician who served as the first professor of anesthesiology at the University of Tennessee College of Medicine. Hingson developed multiple medical devices, including the jet injector for inoculations.
Since the late 1970s, jet injectors have been increasingly used by diabetics in the United States. These devices have all been spring-loaded. At their peak, jet injectors accounted for 7% of the injector market. Currently, the only model available in the United States is the Injex 23. In the United Kingdom, the Insujet has recently entered the ...
The company was founded in 1939 by William M. "Bill" Lester (1908-2005) and his first wife, Betty L (Lubarsky). [1] Rapidly establishing itself as a “leading contractor of custom-made parts and products in plastic” [2] Pyro employed the injection molding method for forming plastic shapes, which Lester had perfected in the early 1930s. [3]
Many notable individuals in the 1960s through the 1990s and beyond created the landscape of modern RC modeling. These included many starting their own companies. The families of many of these individuals lost interest in continuing these businesses. The incoming supply of ARF planes from overseas made it hard to sell kits requiring assembly.
Oscilloscope OL-1 from 1954, the company's first with a relatively small 3-inch CRT which allowed for a highly competitive price of US$ 29.50 (equivalent to $335 in 2023) for the DIY kit. [1] Heathkit is the brand name of kits and other electronic products produced and marketed by the Heath Company.
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The propelling nozzle converts a gas turbine or gas generator into a jet engine. Power available in the gas turbine exhaust is converted into a high speed propelling jet by the nozzle. The power is defined by typical gauge pressure and temperature values for a turbojet of 20 psi (140 kPa) and 1,000 °F (538 °C). [18]
There is an earlier patent 2821981 issued 1958 for a "MULTI-SHOT INOCULANT INJECTOR INSTRUMENT WITH ADJUSTABLE EJECTION PRESSURE CONTROL" invented by Frank A. Ziherl , viewable on Google patents I actually own one of these units called a "Press-O-Jet" and made by Z&W manufacturing, Wickliffe, Ohio however I don't know if this is the first such ...