Peter Firth the film adaptation of "Equus". The film was only a moderate box-office success, but earned Firth a nomination for the Academy Award for Best Supporting Actor and a Golden Globe award in the same category. Further film work quickly followed, most notably Roman Polanski's "Tess" (1979). In May 1981, he appeared on Broadway again in Peter Shaffer's "Amadeus" as Wolfgang Amadeus Mozart, replacing Tim Curry. Shaffer had offered him the role in the original London production, but he was unavailable due to film commitments. Other film work has included roles in "Diamonds on Wheels" (1973); "When You Comin' Back, Red
Shaffer (company) Shaffer (company) Shaffer is a wholly owned subsidiary of National Oilwell Varco and is involved in the manufacturing and distribution of pressure control devices for the petroleum industry. The company's products include blowout preventers, control systems, riser string packages, choke valves, riser tensioners, and drill string compensators. The company was founded by William D. Shaffer in 1928 as Shaffer Tool Works. In 1968, it was sold to the Rucker Corporation, which became known as Rucker Shaffer. It was again sold in 1978 to NL industries, which became known as NL Shaffer. In 1979, NL Shaffer purchased Koomey Control Systems in