GB858117A - Improvements in and relating to electric resistors - Google Patents

Abstract

858,117. Resistors. ENGLISH ELECTRIC CO. Ltd. July 3, 1957 [July 6, 1956], No. 20966/56. Class 37 A number of solid resistor elements are arranged alternately with insulating barriers and with connectors between adjacent elements staggered to provide a tortous current path. The resistance elements are preferably of carbonceramic composition with metallized contact faces. Insulating barriers are preferably of thermosetting synthetic resin. Figs. 1, 3 show elements 10 in the form of interrupted rings having metallized contact faces 11 on opposite sides and interspaced by insulating barriers 12 of similar form but having H-cross-section. A sector shaped hole is provided in each barrier 12 to receive a brass connector 15. One side of each element 10 is supported at three points by two projections 18 in the web of the H-section and by one end of a connector 15. The assembly is clamped together to form a non-inductive resistor by brass contact discs 19, 20 and terminals carried by an insulating rod 16. Insulating spacers 17 and a spring 24 are also provided. A terminal 26 screwed through a hole in one of the barriers into one of the connectors 15 provides a tap. In another embodiment Figs. 5, 6 (not shown) the elements have horseshoe form with metallized end faces alternately connected by spring contacts. In Fig. 7, rectangular elements 31 having opposite ends 32 metallized are arranged alternately with flanged barriers 33 in a laminated paper tube 37. Spring connectors 35 pass through holes in each barrier 33. End connections are made by I-shaped contacts 40 co-operating with smaller springs 42. Metal end caps may form terminals for the complete assembly, or, as shown, terminal 44 may be carried by insulating end caps. A tap is provided at 45. The complete assembly may be embedded in material known by the (Registered Trade Mark) "Araldite".