| Description | The file contains Theatre Projects Consultants Ltd correspondence the client, consultants and contractors, particularly Evershed Power-Optics Ltd, regarding scenery hoist installation as well as sketches and notes. Topics covered include the Olivier Theatre cyclo; commissioning; Olivier progress; Evershed Power-Optics Ltd progress; scenery hoist breaks and supplier Whitton Kramer; defects relating to the point hoist installation; quotations; repairs to hoists; testing; a survey of noise generated by scenery hoists; failures, defects and incident reports; standby system failure; completion and whether it will be achieved on time; adding weight to the hook assembly; spares; system tests and demonstrations; test specification; unauthorised operation of the standby system; matrix room cooling; sprags; cyclo converter reliability; maintenance policy; powered bar flying; snagging; a possible training course; additions to the hoist system; deterioration in power flying equipment; and handover to the Theatre. Other correspondents include Sir Robert McAlpine & Sons Ltd; the National Theatre; Mole Richardson (Stage & Studio Engineering) Ltd; GEC Machines Witton Kramer Division; the South Bank Theatre Board; Vickers Ltd; Sound Research Laboratories Ltd; Davis, Belfield and Everest; Denys Lasdun Redhouse & Softley; Flint & Neill Ltd; Computer Field Maintenance Ltd; Hall Stage Equipment Ltd; and Coubro + Scrutton (M & I) Ltd. The original card folder has been disposed of. '7 Scene Hoists June 77-Aug 79' was written on the front cover, and 'Opened 12.7.77. the National Theatre Scenery Hoists File 7 904-5B2' was written on the spine. |