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Publication numberUS2162420 A
Publication typeGrant
Publication dateJun 13, 1939
Filing dateAug 10, 1938
Priority dateAug 10, 1938
Publication numberUS 2162420 A, US 2162420A, US-A-2162420, US2162420 A, US2162420A
InventorsBuckley Timothy S
Original AssigneeBuckley Timothy S
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plaque for x-ray machines
US 2162420 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

June 13, 3939. 5 BUCKLEY 2,162,420

PLAQUE FOR X-RAY MACHINES Filed Aug 10, 1958 INVENTOR ATTORNEY Patented June 13, 1939 UNHTED STATS Timothy 5. Buckley, Jackson Heights, Long Island, N. Y.

Application August 10, 1938, Serial No. 224,107

4 Claims.

This invention relates to a removable identification plaque for marking an X-ray negative and to the method of producing the same.

In Patent No, 2,120,064 of June '7, 1938, granted 5 to me is disclosed an identification plaque composed of a backing member, an intermediate layer of plastic material and a covering member in the form of sheet material, the intermediate layer being impermeable and the other members being 19 permeable to X-rays. When the covering of the plaque is subjected to a scribing pressure, depressions are formed therein and the plastic material is displaced laterally with respect to the depressions, thus rendering the plaque permeable 15 to X-rays in said depressions. Plaques of the above character have been extensively and successfully used but difiiculty is sometimes experienced if the scribing is done carelessly, i. e. when insufi'icient pressure is applied, and this diffi- 20 culty is increased when the cover sheet is unduly thick because the depressions then may not be sufliciently deep which may leave too much of the plastic impermeable material beneath said depressions.

25 The main object and feature of this invention is to overcome these difficulties.

In the accompanying drawing the invention is disclosed in a concrete and preferred form, in which 30 Fig. 1 is a face view of a plaque embodying the invention with the several layers partly removed; and

Fig. 2 is a sectional view substantially on the plane of line 22 of Fig. l.

35 l indicates a backing member of any suitable material that is permeable to X-rays such as glass. Upon this backing member is deposited a layer of plastic material 2 that is impermeable to X-rays. I have found a composition com- 40 posed of white lead ninety percent, glycerine nine and one-half percent and a Japanned drier onehalf of one percent to be suitable for my purpose. The percentages given are approximate and are by weight and not by volume. I then 5 dust the layer with a metallic powder 3 that is permeable to X-rays, preferably aluminum powder. This powder forms a thin film or sheet as a protective covering over the intermediate layer and any surplus powder is removed as by blow- 50 ing it off. The edges of the plaque are then painted with ordinary paint.

When the covering member is now subjected to scribing pressure by means of a stylus, such as a pencil, said stylus will penetrate the covering member and the plastic layer substantially throughout the entire depth of the latter until said stylus contacts the backing member. In creating this furrow or valley 4 it is found that the covering member crumbles and, with the displaced plastic material forms lands or hills 5 adjacent each side of the furrow, and that the lands or hills so formed do not have any tendency to return into the furrow. A sharp negative of the inscription can therefore be produced,

The plaque, before being inscribed, will retain its characteristics practically indefinitely.

The picture made by X-rays is referred to herein for convenience as a negative, but the term is not intended to be restrictive, as the invention applies equally to any type of picture made by penetrative rays according to this invention.

I claim:

1. A removable identification plaque for marking an X-ray negative comprising: a backing member permeable to X-rays, an intermediate layer of plastic material impermeable to X-rays, and a powder permeable to X-rays covering the plastic material, said powder crumbling and being displaced with the plastic material when subjected to scribing pressure to form a furrow with adjacent hills.

2. A removable identification plaque for marking an X-ray negative comprising: a backing member permeable to X-rays, an intermediate layer of plastic material impermeable to X-rays, and aluminum powder covering the plastic material.

3. The method of producing an identification plaque for marking an X-ray negative, which consists in depositing, on a backing member permeable to X-rays, a plastic material impermeable to X-rays, and dusting the plastic material with a metallic powder that is permeable to X-rays.

4. The method of producing an identification plaque for marking an X-ray negative, which consists in depositing, on a backing member permeable to X-rays, a plastic material impermeable to X-rays, and dusting the plastic material with aluminum powder.

TIMOTHY S. BUCKLEY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2916623 *May 2, 1958Dec 8, 1959Knapp Mills IncMethod and means for detecting flaws in metals
US2939958 *Apr 7, 1958Jun 7, 1960Jarnhs Elek Ska AktiebolagPrinting plates for addressing machines
US2957079 *Dec 27, 1957Oct 18, 1960Gen ElectricPenetrating ray emission coding
US3668394 *Aug 3, 1970Jun 6, 1972Panzer NormanX-ray film identification means
US3790802 *Oct 13, 1971Feb 5, 1974Siemens AgX-ray film identification means
US3917952 *Mar 21, 1974Nov 4, 1975Jackson Dwight SRadiographic record and film identification assembly
US4698836 *Aug 11, 1986Oct 6, 1987Minasian John LMeans and techniques useful in marking X-ray film
US4764948 *Mar 9, 1987Aug 16, 1988Paula HurwitzData marking system for medical x-rays, particularly mammograms
US6198807Jun 11, 1999Mar 6, 2001Desena DanforthX-ray labeling tape
US7263159Nov 21, 2005Aug 28, 2007Beekley CorporationIntermediate density marker and a method using such a marker for radiographic examination
US9360438Aug 9, 2011Jun 7, 2016Rolls-Royce Deutschland Ltd & Co KgMethod for radiographically inspecting a component by means of X-ray beams using a smoothing agent and smoothing agent for carrying out the method
WO2012019754A1 *Aug 9, 2011Feb 16, 2012Rolls-Royce Deutschland Ltd. & Co. KgMethod for radiographically inspecting a component by means of x-ray beams using a smoothing agent and smoothing agent for carrying out the method
Classifications
U.S. Classification378/165, 252/478
International ClassificationG03B42/04
Cooperative ClassificationG03B42/047
European ClassificationG03B42/04M