Radiant energy – Photocells; circuits and apparatus – Housings
Patent
1975-07-28
1977-01-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Housings
250568, H01J 502
Patent
active
040052877
ABSTRACT:
Apparatus for attaching a nose section to the main body of a hand-held optical reader (Wand) is provided to accommodate the replacement of internal lamps illuminating a field of information. A nose attachment having a centrally located aperture encompassed by an integral and externally threaded cylindrical extension is secured to the nose section. The aperture and cylindrical extension are aligned and concentric with the optical image path of the Wand. In attaching the nose section to the Wand main body, the cylindrical extension is passed through an aperture in a partitioning frame of the Wand into which the lamps are seated. A screw-on cap, having a centrally located aperture with internal helical threads complementing the external threads of the nose attachment extension, is screwed onto the extension to secure the nose section to the partitioning frame. An outwardly extending flange integrally formed on the cap extends through opposing apertures of the Wand outer covers to accommodate access by hand. When the lamps are to be removed, a tangential force couple is applied by hand to the flange of the cap to detach the nose section, and thereby expose the lamps. Captive surfaces formed onto the nose attachment and the partitioning frame prevent lateral movement between the nose section and the Wand, and confine the movement of the screw-on cap within the Wand when the nose section is detached.
REFERENCES:
patent: 3334236 (1967-08-01), Bacon
patent: 3528295 (1970-09-01), Johnson et al.
patent: 3727030 (1973-04-01), McMurtry
patent: 3748483 (1973-07-01), Englund et al.
patent: 3792240 (1974-02-01), Stumdo
patent: 3920959 (1975-11-01), Wefers et al.
Nelms David C.
Recognition Equipment Incorporated
Vandigriff John E.
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