Low inertia brush block assembly

Details Low inertia brush block assembly Low inertia brush block assembly

1991-05-20

1993-06-15

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, 378194, 439 13, 439 28, G03B 4116

Patent

active

052205886

ABSTRACT:
The power brush block assembly (26) and a communication signal brush block assembly (28) are mounted to a rotating gantry portion (20) of a CT scanner in sliding communication with a stationary slip ring (16). The power communication brush block includes a plurality of like mounting blocks which when interconnected together in alignment define a locator aperture (64') and a shaft aperture (26') in radial alignment. A brush (70) includes a tip (72) and a shaft (76) around which a coil spring (100) is slidably received. The brush and spring assemblies are slidably received through the locator aperture until the brush tip is in sliding communication therewith and the shaft is in sliding communication with the shaft aperture. A retainer (102) prevents the spring from propelling the brush completely through the locator aperture. An electrical lead (104, 104') has a friction connector (106) which is connected to one end (78) of the brush shaft and connected at its other end with an electrical contact (88, 88' ). In the power brush block assembly, the locator and shaft apertures are defined by mounting together like mounting blocks (110). In the communication signal brush block assembly, the locator and shaft apertures are defined in circuit boards (60, 80) which are held in an arcuate figuration by identical spacer plates (44). Identical side plates (42) interconnect the slide plates and to provide a mounting arrangement for mounting the brush block to the rotating gantry portion.

REFERENCES:
patent: 4323292 (1982-04-01), Lewis et al.
patent: 4352530 (1982-10-01), Dinwiddie et al.
patent: 4544215 (1985-10-01), Fritsch
patent: 4644573 (1987-02-01), Palermo et al.
patent: 4779469 (1988-10-01), Ashley
Product Bulletin, The Polymer Corporation, Reading, Pa., BR 17-B, Nov. 1987.
Picker International Drawing Nos. D 97410; D 97634; D 171765; and D 171766 (Four Sheets).

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