Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1990-11-21
1992-03-17
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036301, 378148, G01T 1163
Patent
active
050971310
ABSTRACT:
An outer gantry (20) is movably mounted on wheels to move along tracks (22). An inner gantry (30) rotatably mounted on the outer gantry includes at least a pair of guide rods (56, 58) on which detector heads (32, 34) are slidably mounted. Motors (92, 102) selectively translate the detector heads along the guide rods. A chain and sprocket arrangement (116, 114; 128, 126) constrains the heads against canting and maintains opposite sides of the detector heads in alignment as the detector heads move and as the inner gantry rotates. Each detector head includes a roller bearing track or channel portion (140) on which a horizontal track portion (142) of a collimator (144) is hung vertically. A collimator connecting assembly (150) connects a bottom portion of the collimator to the detector head and secures it against further horizontal movement. A collimator cart (200) includes an analogous roller track portion (202) for supporting the collimators by the collimator guide track portion as collimators are moved between the detector head and like track portion ( 192) of a detector storage rack (190).
Plummer Steven J.
York David L.
Hanig Richard
Howell Janice A.
Picker International Inc.
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