US3581094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray apparatus
Assignee: Machlett Laboratories Inc
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Filing: 1968-11-07
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Granted: 1971-05-25
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Expires: 1988-11-07
Abstract
Abstract X-ray apparatus for preventing overexposure of a subject to Xradiation by limiting the size of the irradiated area to conform substantially to the size of any one of a number of predetermined selected film sizes. This is achieved by an electrical system for compiling and integrating information indicative of the longitudinal and lateral dimensions of the film area, the distance between the film and the X-ray tube, and the size of the cone of radiation as established by adjusted collimation of the X-ray beam. The electrical system functions to effectively permit operation of the X-ray tube when integrated information indicates that the various components of the apparatus are properly adjusted so that the size of the cone of radiation and, consequently, of the irradiated area conforms substantially to the size of a film being used.
Inventors
- 👤 Leonard F Peyser
- 👤 Gordon F Baror
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:22
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/025; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
X-ray apparatus comprising a source of X-radiation for producing a beam of X-rays directed to a film to be irradiated, a collimator in spaced relation with said source having an adjustable aperture through which a beam of X-rays passes to said film, control means in said collimator for adjusting the size of the aperture and consequently the cross-sectional size of a beam passing through the aperture, said control means including means for producing a first electrical signal corresponding to the size of said aperture, size sensing means for determining the size of the film to be irradiated and for producing second electrical signals corresponding thereto, direction sensing means for separately sensing the cross-tray or cross-table position of the film and for producing third electrical signals corresponding thereto, and integrating means for receiving said signals from the size sensing means, the direction sensing means and the control means and for determining the relationship between the size and direction of the film and the cross-sectional size and shape of a beam at said film as controlled by the size of said aperture.
Claim 2
Dependent Claim
180 words
X-ray apparatus comprising a source of X-radiation for producing a beam of X-rays directed to a film to be irradiated, a collimator in spaced relation with said source having an adjustable aperture through which a beam of X-rays passes to said film, control means in said collimator for adjusting the size of the aperture and consequently the cross-sectional size of a beam passing through the aperture, said control means including means for producing a first electrical signal corresponding to the size of said aperture, size sensing means for determining the size of the film to be irradiated and for producing second electrical signals corresponding thereto, direction sensing means for separately sensing the cross-tray or cross-table position of the film and for producing third electrical signals corresponding thereto, and integrating means for receiving said signals from the size sensing means, the direction sensing means and the control means and for determining the relationship between the size and direction of the film and the cross-sectional size and shape of a beam at said film as controlled by the size of said aperture.
Claim 3
Dependent Claim
14 words
X-ray apparatus as set forth in claim 1, said control means is manually operable.
Claim 4
Dependent Claim
171 words
X-ray apparatus as set forth in claim 1 wherein said first signal producing means includes switch means and said collimator includes a pair of control shafts, said switch means including a pair of rotary switches connected with the respective control shafts, and integrating means includes a pair of rotary switches each have a rotor and a switch plate, and said control mechanism comprises a cam fixed to each control shaft for rotation therewith, a switch operating shaft connected to both switches, a pair of pinion gears on the switch operating shaft, a pair of drive gears in mesh with respective pinion gears, and driving links between the drive gears and the respective cams, whereby rotation of the cams by the control shafts upon adjustment of the aperture plates will cause rotation of the respective pinion gears, one pinion gear being connected to the rotors of the switches and freely revolvable on the switch operating shaft and the other pinion gear being fixed to the switch operating shaft for adjusting said switchplate.
Claim 5
Dependent Claim
25 words
X-ray apparatus as set forth in claim 3 wherein compensation means is provided for adjusting said integrating means when the film is in cross-table position.
Claim 6
Dependent Claim
34 words
X-ray apparatus as set forth in claim 4 wherein said compensation means comprises adjustment means operatively connected to said switch means for adjusting said switch means to compensate for cross-table positioning of the film.
Claim 7
Dependent Claim
15 words
X-ray apparatus as set forth in claim 5 wherein said compensation means is manually operable.
Claim 8
Dependent Claim
15 words
X-ray apparatus as set forth in claim 5 wherein said compensation means is automatically operable.
Claim 9
Dependent Claim
58 words
X-ray apparatus as set forth in claim 5 wherein said direction-determining means includes an electrical switch, and said compensation means comprises a solenoid electrically connected to said electrical switch, and linkage is connected between said solenoid and said integrating means for adjusting said integrating means when said solenoid is operated in response to operation of said electrical switch.
Claim 10
Dependent Claim
59 words
X-ray apparatus as set forth in claim 1 wherein is provided means for supplying power to said source, and means connected with and responsive to said integrating means for preventing transmission of power to said source when said integrating means determines the cross-sectional size of the beam at said area will not conform to the size of the area.
Claim 11
Dependent Claim
184 words
X-ray apparatus as set forth in claim 1 wherein said size sensing means comprises support means for said film, clamping means engageable with opposite sides of said film, cam means connected to said clamping means and adjustable therewith to a position determined by the positioN of the clamping means, said cam means comprising a disc having a side surface with varying circumferential amplitude, and electrical switch means positioned in engagement with said side surface of the cam means for producing an electrical signal corresponding to the position of the cam means as determined by the adjusted position of the clamping means, and wherein said direction sensing means comprises mechanical linkage connected to said clamping means and includes a feeler member in engagement with said film when said film extends in a first direction and which is out of engagement with the film when the film extends in a direction perpendicular to said first direction, a direction signal switch, and switch operating means connected to said linkage and movable in response thereto for operating said switch when said film extends in one of said directions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |