Panoramic dental x-ray machine

Radiant energy – Fluent material containment – support or transfer means – With irradiating source or radiating fluent material

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250445R, 250449, G03B 4116

Patent

active

041257740

ABSTRACT:
A dental X-ray machine for providing both continuous and discontinuous radiographic images of a patient's dental arch area. Continuous images are obtained when an X-ray source-camera assembly orbits a patient in one direction while the patient is transported in a substantially semicircular pattern in the opposite direction. The pattern is achieved through improved X-Y drive mechanism which rotates a crank assembly having a pair of depending roller guides, one of which roller guides engages guideway means affixed to a plate which is capable of traveling in an X-direction only, and the other roller guide engaging similar guideway means affixed to another plate which is capable of traveling in a Y direction only. The combined motion of the plates, upon rotation of the crank assembly produces an X-Y pattern resembling a semicircle. Discontinuous images are obtained when another plate, which plate also guides the aforementioned plate capable of moving in the X direction only, is shifted in the Y direction by a cam-drive rod mechanism when the patient's spinal cord becomes aligned with the X-ray source-camera assembly.

REFERENCES:
patent: 2798958 (1957-07-01), Hudson
patent: 3045118 (1962-07-01), Hollman
patent: 3906227 (1975-09-01), Ensslen

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