Title: Dental X-ray alignment system

Abstract: Dental x-ray film is properly aligned with the x-ray beam utilizing a plurality of infrared emitters and detectors that are positioned circumferentially about the path of the x-ray beam. A reflecting surface whose plane is parallel with the plane of the x-ray film holder and integral therewith can be positioned parallel to the plurality of emitters and sensors by repositioning until the sensors receive a predetermined reflective response. Each sensor activates an indicator light seen on a display and when all the lights in a bank of lights are activated alignment is achieved. The output of the sensors can also be summed and when the sum output reaches a predetermined value an oscillator is triggered thus creating an audible tone indicating proper alignment.

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Inventors: Altschuler, Bruce R. (San Antonio, TX, US)
Segreto, Vincent A. (San Antonio, TX, US)
Brown, Jr., Cecil E. (Oxon-Hill, MD, US)

Application Number: 665193
Filing Date: 1976-03-09
Publication_date: 1977-03-15
Assignee:
Primary Class(es): 378/170 250/338.1, 378/98, 378/206
Other Classes:
US Patent Ref:

2090933	Aug, 1937	Bolin	250/521.
2553028	May, 1951	Wright	250/479.
2659824	Nov, 1953	Burnham	250/491.
3076949	Feb, 1963	Anderson	250/338.
3092721	Jun, 1963	Medwedeff et al.	250/491.
3777160	Dec, 1973	Bernt	250/338.
3861807	Jan, 1975	Lescrenier	250/491.

Other Refs:
Primary Examiner: Dixon, Harold A.
Assistant Examiner:
Attorney: Rusz; Joseph E.