US3928770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film cassette
Assignee: Ilford Imaging UK Ltd
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Filing: 1974-08-19
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Granted: 1975-12-23
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Expires: 1994-08-19
Abstract
Abstract An X-ray film cassette which comprises (a) a rectangular base member consisting of a flat base plate which has on three sides upstanding walls having thereon inwardly directed horizontal flanges, (b) a cover member held in position on the base member which consists of a flat plate which has on three sides upstanding walls having thereon outwardly directed horizontal flanges, the dimension of both the base member and the cover member being so chosen that the flanges on the cover member can slide under the flanges on the base member to hold the cover member in the base member, (c) resilient means located between the base plate of the base member and the horizontal flanges of the cover member for holding the cover member in the raised position so that the horizontal flanges on the cover member abut the horizontal flanges on the base member, (d) means located in the base member enabling the cover member to be held with its flanges adjacent to the base plate of the base member when the cover member is pushed down against the resilient means to enable the cassette to be closed, (e) means for releasing the cover member so that it can return to the raised position, (f) means for rendering light-tight the side of the cassette which is not covered by an upstanding wall on the base member and (g) means for retaining an X-ray film firmly in position in the cassette when the cassette is in the closed position.
Inventors
- 👤 Turner George Frederi Marriott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:47
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
249 words
An X-ray film cassette which comprises (a) a rectangular base member consisting of a flat base plate which has on three sides upstanding walls having thereon inwardly directed horizontal flanges, (b) a cover member held in position on the base member which consists of a flat plate which has on three sides upstanding walls having thereon outwardly directed horizontal flanges, the dimension of both the base member and the cover member being so chosen that the flanges on the cover member can slide under the flanges on the base member to hold the cover member in the base member, (c) resilient means located between the base plate of the base member and the horizontal flanges of the cover member for holding the cover member in the raised position so that the horizontal flanges on the cover member abut the horizontal flanges on the base member, (d) means located in the base member enablIng the cover member to be held with its flanges adjacent to the base plate of the base member when the cover member is pushed down against the resilient means to enable the cassette to be closed, (e) means for releasing the cover member so that it can return to the raised position, (f) means for rendering light-tight the side of the cassette which is not covered by an upstanding wall on the base member and (g) means for retaining an X-ray film firmly in position in the cassette when the cassette is in the closed position.
Claim 2
Dependent Claim
249 words
An X-ray film cassette which comprises (a) a rectangular base member consisting of a flat base plate which has on three sides upstanding walls having thereon inwardly directed horizontal flanges, (b) a cover member held in position on the base member which consists of a flat plate which has on three sides upstanding walls having thereon outwardly directed horizontal flanges, the dimension of both the base member and the cover member being so chosen that the flanges on the cover member can slide under the flanges on the base member to hold the cover member in the base member, (c) resilient means located between the base plate of the base member and the horizontal flanges of the cover member for holding the cover member in the raised position so that the horizontal flanges on the cover member abut the horizontal flanges on the base member, (d) means located in the base member enablIng the cover member to be held with its flanges adjacent to the base plate of the base member when the cover member is pushed down against the resilient means to enable the cassette to be closed, (e) means for releasing the cover member so that it can return to the raised position, (f) means for rendering light-tight the side of the cassette which is not covered by an upstanding wall on the base member and (g) means for retaining an X-ray film firmly in position in the cassette when the cassette is in the closed position.
Claim 3
Dependent Claim
35 words
An X-ray film cassette according to claim 1 wherein the resilient means (c) are leaf springs mounted either on the base plate of the base member or on the horizontal flanges of the cover member.
Claim 4
Dependent Claim
90 words
An X-ray film cassette according to claim 2 wherein the means (d) for holding the flanges of the cover member adjacent to the base plate comprise locking members located adjacent the two side walls of the base plate which face each other, there being corresponding apertures in the horizontal flanges of the cover member so that when the cover member is pushed down against the resilient means the locking members are forced through the apertures and partially lap over the horizontal flanges on the cover members so closing the cassette.
Claim 5
Dependent Claim
84 words
An X-ray film cassette according to claim 3 wherein the said locking members are present on the side arms of a U-shaped locking device which consists of two side arm members joined by a bow-spring member, each of these three members being located under the overhanging flanges of the base plate, the two side arm members being connected to the corresponding side walls of the base member in such a way that they can be moved in a horizontal direction to a limited extent.
Claim 6
Dependent Claim
53 words
An X-ray film cassette according to claim 4 wherein each of the two side arm members are connected to the corresponding side walls of the base member by means of a rivet attached to the side wall, which rivet moves in a slot on the corresponding side arm member of the locking device.
Claim 7
Dependent Claim
34 words
An X-ray film cassette according to claim 5 wherein the said bow-spring attached to the side arms is notched at each end at least to the thickness of the flanges on the cover member.
Claim 8
Dependent Claim
55 words
An X-ray film cassette according to claim 1 wherein the means (g) for retaining the film in position in the cassette are four shallow walls mounted on the base plate together with resilient means attached to the cover member of the cassette and which fits inside the four shallow walls when the cassette is closed.
Claim 9
Dependent Claim
35 words
An X-ray film cassette according to claim 1 wherein the means (f) for rendering the open side of the cassette light-tight are overlapping flanges mounted both on the base member and on the cover member.
Claim 10
Dependent Claim
98 words
An X-ray film cassette according to claim 7 wherein there is located on the base plate a hingeable member which is either at least a portion of an X-ray intensifying screen or a metal plate co-planar with the intensifying screen the said member being hingeably attached to the base plate so that when the cassette is turned over so that the bottom side of the base plate faces substantially in an upward direction and the cassette is opened the end of the hingeable member which is not hinged falls away from the base plate on which it rests.
Claim 11
Dependent Claim
15 words
An X-ray cassette according to claim 9 wherein the hingeable member is a lead plate.
Claim 12
Dependent Claim
26 words
An X-ray cassette according to claim 9 wherein means are provided in the cassette for ensuring that the hingeable plate falls only through a limited distance.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |