An article on the history of steel pan for IDBAmerica by David Mangurian, Laventille, Trinidad.
A Brief History of Steel Drum Instruments written by Christopher D. Walborn and published by Rhythmical Steel
Steel Island has published an illustrated overview of the development of the steel pan at their web site: www.steelisland.com/history.asp
An article on the history of pan, written by Bukka Rennie on November 11, 1999 for TriniSoca.com
The steel pan, the tuned steel drum, is one of the few genuinely novel acoustic instruments invented in the twentieth century. Its origin is believed to be dustbins, used as rhythm instruments by the traditional Carnival bands of Trinidad & Tobago in the 1930's. During its 50-year history the steel pan has evolved from a multi-pitched percussion instrument to the mellow-sounding melodic-harmonic instrument of today.
The history of the steel pan is a story of prohibitions and compulsion. Its invention was in fact induced by the ruling colonialists trying to suppress the strong rhythmic heritage of the black Africans. Here are some milestones in the history of the pan:
The early rhythm steel drums were usually made from paint tins or biscuit tins, one foot in diameter and two feet long. It was discovered that bulges of different sizes in the bottom of a tin could produce sounds of various pitches. Some of the more inventive players started to tune the tins and play melodies on them. Several sources point out Winston "Spree" Simon as the inventor of the first melodic steel pan.
An oil industry as well as an U.S. naval base had been established on the island of Trinidad. Leftover oil drums were often cut in two and used as dustbins. These dustbins successively replaced the biscuit tin as the raw material for pan making. The bottom of the dustbin was hammered outwards to a convex shape (i.e., the opposite to a modern steel pan) and then small dents for the different notes were made in it. In the later part of the 1940's, pan tuner and arranger Elliot "Ellie" Manette changed the design to concave with convex note-dents and increased the number of notes in the pan.
Through the fifty years following the second world war, the steel pan has been further developed by panmakers through sophisticated experimentation with the physical parameters of the metal, using intuition, trial and error experiments and a good musical ear. The development is still in progress; refinements are made and new crafting techniques and constructions are tested. A number of pan types with different layouts have evolved from this experimentation. Some problems that have not yet been finally resolved are the standardization of the note layout on the various pan types and the evaluation of the effectiveness of the different existing crafting techniques.
Read more about the steel pan in my book: Steel Pan Tuning - a Handbook for Steel Pan Making and Tuning