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In 1959 [8] Hozelock Ltd in the United Kingdom invented and patented the international standard plastic, click-on style, push-fit hose end connector now used with garden hoses. The concept was developed to replace metal hose end connectors in coal mines, which were prone to cause static sparks and the possibility of methane gas explosions.
Hozelock Ltd was originally set up by Sydney Codling in 1959 [citation needed] to sell hoses and garden equipment including the first plastic quick-connector hose connector. . As well as manufacturing the equipment in the Haddenham factory they also designed many of their own produ
Hozelock Britain 1968 Machino Japan JIS B9911 1977 Forestry Coupling Canada CAN/ULC-S551 UNI Italy <1980 Camlock U.S. Mil-C-27487 1981 Nakajima Japan JIS F7335 1981 Barcelona Spain UNE 23400-1:1981 DSP France NFS 61 704:1966 Raccord Symeetrique Auto-Etanches DSP (Fire Fighting Equipment - Self-sealing Symmetrical Half Couplings, Sizes 40 And 65)
A 37° flare type end fitting for flexible hose. The AN thread (also A-N) is a particular type of fitting used to connect flexible hoses and rigid metal tubing that carry fluid.
The pilot pin is located in the centre of main contact circle on 4- and 5-pin connectors. On 3-pin (2P+E) connectors, it is located on the contact circle opposite the ground pin. The other connectors are located 105° on either side of the earth pin, rather than 120° as in the smaller variants, to make room for the pilot pin.
Spigots or sillcocks have male hose connectors only, and the mating end of a hose has a captive nut which fits the threads there. The thread standard for garden hose connectors in the United States, its territories, and Canada is known colloquially as "garden hose thread" (GHT), but its official designation is NH ("National Hose"):
Schematic symbols for male and female connector pins. In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally designated as male or female, [1] a distinction referred to as its gender. [2] The female connector is generally a receptacle that receives and holds the male connector.
On-load tap changer (OLTC), also known as On-circuit tap changer (OCTC), is a tap changer in applications where a supply interruption during a tap change is unacceptable, the transformer is often fitted with a more expensive and complex on-load tap changing mechanism. On-load tap changers may be generally classified as either mechanical ...