Pinchbeck

Dakin J.P., Wade C.A., Pinchbeck D., Wykes J. S., A novel optical fibre methane system, Fibre Optics 87, vol. 734, SPIE, London, 1987. 

John Champion patented in 1758 the process of producing brass and zinc from the common ore of zincblende (ZnS) or black jack (patent number 726). This ore had previously been considered worthless, but even with this advance it is obvious that metallic zinc was still far too expensive to use in brass production by direct mixing, a process which was patented by James Emerson in 1781 (no. 1297). Watson (1786), however, describes the use of zinc in the production of high-quality gilding brasses such as pinchbeck, tomback and Mannheim gold (see below). 

Tomback - derived from a Malay word - 86% Cu, 14% Zn + a little tin Pinchbeck - named after an 18th Century London clockmaker - 88% Cu,... 

Franklin, N.L., Pinchbeck, P.H., and Popper, F. (1956), A Statistical Approach to Catalyst Development Part I The Effect of Process Variables on the Vapour Phase Oxidation of Naphthalene, Trans. Instn. Chem. Engrs, 34, 280-293. 

The possible existence of Huxley s mysterious, timeless regions of reality has led professional and amateur researchers to ponder the extraordinary effects of the DMT molecule (N,N-Dimethyltryptamine). DMT is a psychoactive chemical that causes intense visions and coaxes users to quickly enter a completely different world that some have likened to an alien or parallel universe. DMT is a chemical produced in our own bodies and by many plants. Daniel Pinchbeck in Breaking Open the Head says, smoking DMT is like being shot from a cannon into another dimension and returning to this world in less than ten minutes. The transition from our world to the DMT universe ( DMTverse ) oc-... 

Pinchbeck, Daniel, Breaking Open the Head (New York Broadway, 2002). 

Pinchbeck, Daniel, Interview with Daniel Pinchbeck by Joseph Durwin, The Orbits Project, http //brainmachines.com/index2.html... 

Pickover, Clifford, The Loom of God (New York Plenum, 1997). Pinchbeck, Daniel, Breaking Open the Head (New York Broadway, 2002), 240. 

The alloy of zinc with copper is termed brass, pinchbeck, Muntz metal, and tombac. English brass usually contains 70 per cent, of copper and 30 of zinc. It is made by melting the copper and adding the molten zinc. The addition of nickel (Cu 52 per cent., Zn 23 per cent., Ni 13 per cent.) yields German silver, of which spoons, forks, and coins are made. Electroplate has usually a basis of this alloy, and is covered with silver by depositing it from its double cyanide with potassium. Zinc coated over... 

Pinchbeck is an alloy invented by Christopher Pinchbeck, a British clock-maker, in the early 1700s. It was used to make jewelry that looked like gold, but was much less expensive. The precise composition of the original pinchbeck alloy has been lost, but it was composed mostly of copper and zinc. The term pinchbeck has been applied to any inexpensive, gold-colored metal used in jewelry. 

Pinchbeck, P. H., The kinetic implications of an empirically fitted yield surface for the vapour-phase oxidation of naphthalene to phthalic anhydride, Cheni. Eng. Sci., 6, 105-111 (1957). 

Place J.D., Pinchbeck, D., Fiber Optic Sensors for the Gas Industry, 51st Autumn Meeting, London London Institution of Gas Engineers, Na 1269, 1985. 

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