Electric signal transfer system

F - Mech Eng,Light,Heat,Weapons – 27 – B

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339/3, 39/32

F27B 7/42 (2006.01) F27D 21/00 (2006.01)

Patent

CA 1256693

ABSTRACT OF THE DISCLOSURE A rotary kiln has a number of thermocouples respectively sensing the kiln temperature at spaced locations and respectively connected to annular slip rings each in kiln sections. Laterally facing peripheral surfaces of the rings are respectively cooperable with brush contacts connected to a bar and a fork which embraces a ring moveable axially with the rings. Thus, on longitudinal expansion of the kiln the contacts are caused to move with the rings. The electric signal from the thermocouples are fed to a stationary sensor. In a modification the ring sections are electrically isolated and each section is connected to a respective sensor. Position sensors may be used to detect the rotary position of the kiln. The invention can be applied to other sensors. 30447

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