Torque measuring apparatus

Measuring and testing – Dynamometers – Responsive to torque

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Details

25023110, G01L 314

Patent

active

050145606

ABSTRACT:
The problem of providing a high speed torque measuring apparatus (10) is solved by first and second coaxial members (18, 20) having an elastic coupling (25) which interconnects the coaxial members for allowing relative angular displacement in proportion to the magnitude of a torque load applied to one of the members. First and second concentric apertures (32 and 34a, 34b) are provided in the first and second coaxial members, respectively, for movement into overlapping relationship in response to the relative angular displacement of the coaxial members. A light source (40) is provided on one side of the coaxial members for transmitting light through the aperture in both members when in their overlapping relationship whereby the transmitted light intensity is in proportion to the amount of overlap between the apertures. A light intensity detecting device (42) is provided for receiving the light transmitted through the overlapped apertures.

REFERENCES:
patent: 1957681 (1934-05-01), Thompson
patent: 2136223 (1938-11-01), Thomas
patent: 2147711 (1939-02-01), Martin
patent: 2586540 (1952-02-01), Holden
patent: 3111028 (1963-11-01), Lebow
patent: 3625055 (1971-12-01), Lafourcade
patent: 3938890 (1976-02-01), Flavell
patent: 3940979 (1976-03-01), Ward et al.
patent: 4446746 (1984-05-01), Aoshima et al.
patent: 4676331 (1987-06-01), Iwaki et al.
patent: 4693123 (1987-09-01), Bacardit

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