Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A medical X-ray sensitometer for exposing both sides of sensitometric film strips simultaneously from a single light source, comprising: a housing having a light opening; multistep sensitometer tablets in said housing for firmly holding therebetween film strips for exposure to such light source; a bracket connected to said housing adjacent such opening; a box containing a single light source mounted on said bracket in spaced relation to such light opening; twin mirrors mounted in said housing for rotation about parallel axes located equidistant from the plane of the film on opposite sides thereof; fixed aperture plates removably located in the housing in light paths from said single light source to the mirrors; a leaf shutter mechanism carried by said box between such light source and said aperture plates; cam means comprising one cam aperture to open said shutter relative to the mirror position and another cam aperture to close the shutter at such mirror position, and means for simultaneously rotating said mirrors through a single 360* cycle for reflecting light from said source onto opposite sides of such film strip in synchronism when the shutter is open.
Claim 2
Dependent Claim
187 words
A medical X-ray sensitometer for exposing both sides of sensitometric film strips simultaneously from a single light source, comprising: a housing having a light opening; multistep sensitometer tablets in said housing for firmly holding therebetween film strips for exposure to such light source; a bracket connected to said housing adjacent such opening; a box containing a single light source mounted on said bracket in spaced relation to such light opening; twin mirrors mounted in said housing for rotation about parallel axes located equidistant from the plane of the film on opposite sides thereof; fixed aperture plates removably located in the housing in light paths from said single light source to the mirrors; a leaf shutter mechanism carried by said box between such light source and said aperture plates; cam means comprising one cam aperture to open said shutter relative to the mirror position and another cam aperture to close the shutter at such mirror position, and means for simultaneously rotating said mirrors through a single 360* cycle for reflecting light from said source onto opposite sides of such film strip in synchronism when the shutter is open.
Claim 3
Dependent Claim
85 words
The invention as defined by claim 1, including: a longitudinally adjustable bellows-type light tunnel of rectangular cross section connected between said light-source box and said housing to cover such opening; a light-box-supporting platform slidably mounted on said bracket for accurately adjusting the light source toward and away from said housing; and manually operable means for precisely setting the position of said platform on said bracket, to fix the optical distance between such single light source and the film exposed to light therefrom via said mirrors.
Claim 4
Dependent Claim
68 words
The invention as defined by claim 1, including: means comprising a folder supporting one of said tablets in said housing; means acting to automatically retract the other tablet upon completion of each film exposure cycle, and close upon insertion of unexposed film strip; and a sliding drawer assembly whereby said tablet holder can be pulled out of the housing for easy loading of film strip to be exposed.
Claim 5
Dependent Claim
38 words
The invention as defined by claim 3, including: means for automatically locking the drawer when the latter is pushed back to film exposure position, thereby insuring exact registration of the tablets immediately prior to and during film exposure.
Claim 6
Dependent Claim
37 words
The invention as defined by claim 4, wherein said automatic drawer locking means comprises an eccentric cam and link mechanism which also serves as a pressure platen that holds film strip securely between the tablets during exposure.
Claim 7
Dependent Claim
132 words
The invention as defined by claim 1, wherein said means for rotating said mirrors comprises: a constant speed electric drive motor; a jackshaft driven by said motor; two electromechanical clutches mounted on said jackshaft; each of said clutches including a hub having a gear which meshes with a gear on an outPut shaft, whereby the jackshaft operates to idle but not transmit power to the output shaft until one of the clutches is energized, and the output shaft is capable of two different speeds, either one of which electrically can be preselected; and sprocket and silent chain drive means connecting said jackshaft and mirrors for simultaneously rotating said mirrors, comprising means for adjusting the relative angular position of the mirrors with respect to each other to synchronize their angular positions in operation.