US2178226A - Method of making flat-bottomed cathode ray tubes - Google Patents
Method of making flat-bottomed cathode ray tubes Download PDFInfo
- Publication number
- US2178226A US2178226A US165430A US16543037A US2178226A US 2178226 A US2178226 A US 2178226A US 165430 A US165430 A US 165430A US 16543037 A US16543037 A US 16543037A US 2178226 A US2178226 A US 2178226A
- Authority
- US
- United States
- Prior art keywords
- cathode ray
- bulb
- ray tubes
- flat
- making flat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/02—Blowing glass; Production of hollow glass articles with the mouth; Auxiliary means therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/32—Giving special shapes to parts of hollow glass articles
Definitions
- present invention is concerned with a method of manufacturing cathode ray tubes hav ing a flat bulb bottom.
- the customary'form of cathode ray'tube of 5 the kind used, for instance, for television work consists of a cone-shaped flaring bulb which is closed by a curved bottom which mostly supports the luminescent or fluorescent substance (phosphor).
- fiat disk is welded onto the end of the bulb.
- the manufacture of such bulbs is rather For reasons of ruggedness andv far greater than with bulbs with a curved bottom which can be made in one piece.
- the present invention discloses an extremely simple method of manufacturing tubes having a flat bottom of the kind used particularly for television work.
- the bulb of the-tube including the'fiat closure or end disk thereof is "made by blowing, in one working stage, a heated glass parison against a flat metal surface while the remaining portions of the gob are unconfined, and retaining the glass in such position until it hardens.
- FIG. 1 and 2 are partial elevations of the tube fluorescent Screen e, abulb bottom which bulb in the course of production and in finished is convex in reference to the imaging lens is state.
- l denotes the very unsuited.
- compensatory g s bu 2 is the l Surface a a st which 30 optical lenses have been suggested in the prior he b is ew W n in h p a e; 80 art both in the case of directviewing as well by the agency of an 'b a acting in e lilas in the case of optical projection of fluorescent Y l'eetien 0f the arrow so that a tube havinga screen pictures.
Description
K. DIELS 2.178.226 METHOD OF MAKING FLAT-BOTTOMEQ CATHODE RAY TUBES Filed Sept. 24, 1957 INVYENTOR KURT D/ELS ATFORNEY Patented Oct. 31,1939 2,178,226
Kurt Diels,'Berlin, Germany, assignor to Telefunken Gesellschaft fiir Drahtlose Telegraphic in. b. H Berlin, Germany, a corporation of Germany Application September 24, 1937, Serial 1%.,165430 lin Germany July 16, 1936 2 Claims.
They. present invention is concerned with a method of manufacturing cathode ray tubes hav ing a flat bulb bottom. r
The customary'form of cathode ray'tube of 5 the kind used, for instance, for television work consists of a cone-shaped flaring bulb which is closed by a curved bottom which mostly supports the luminescent or fluorescent substance (phosphor).
fiat disk is welded onto the end of the bulb.
However, the manufacture of such bulbs is rather For reasons of ruggedness andv far greater than with bulbs with a curved bottom which can be made in one piece. Now, the present invention discloses an extremely simple method of manufacturing tubes having a flat bottom of the kind used particularly for television work. According to the invention, the bulb of the-tube including the'fiat closure or end disk thereof is "made by blowing, in one working stage, a heated glass parison against a flat metal surface while the remaining portions of the gob are unconfined, and retaining the glass in such position until it hardens.
- KURT DIELS.
strength a curved bottom has proved most ad- (gob) when in plastic state against a flat sur- 10 vantageous in these tubes or bulbs for this makes face preferably consisting of metal.- It has been it feasible to make the bottom of comparatively discovered that if the glass gob is blown against thin glass; and if the bulb of the tube is conical, a sufliciently flat surface, the surface produced the change from or the connection between the in the interior of the bulb will turn out so flat 15 bottom of the bulb and the sides carrying the and smooth that no trace of distortion is nobottom may be so formed that the risk of breakticeable. A tube or bulb manufactured by the age is minimized. 3 method of this invention is eminently suited also However, the curvature of the bulb bottom, for projection Work- It has also been When viewing a picture oscillogram or the like itained that especially when a hard variety of I delineated upon the bottom of the bulb proves glass is employed in making the bulb and if care extremely annoying on the ground that in adis taken so that the smooth and flatbulb surdition to the reflection of light reaching the face is heavier and thicker than the lateral walls viewer's eyes from the convex glass surface,- the of the bulb, the risk of breakage will be extremely ,image seems subject to thefbarrel" type of dissmall. 26 tortion. Also in the case of a projection f a, Figs. 1 and 2 are partial elevations of the tube fluorescent Screen e, abulb bottom which bulb in the course of production and in finished is convex in reference to the imaging lens is state. Referring to the drawing, l denotes the very unsuited. For this reason, compensatory g s bu 2 is the l Surface a a st which 30 optical lenses have been suggested in the prior he b is ew W n in h p a e; 80 art both in the case of directviewing as well by the agency of an 'b a acting in e lilas in the case of optical projection of fluorescent Y l'eetien 0f the arrow so that a tube havinga screen pictures. Particularly where compensat- 'l y flat bottom ensues the kind Shown ing lenses of large diameters are required for in I 5 the saidpurpose, means of the said kind are W I claim 15! very costly. 'Because of all of these disadvan- The method of makmg a 5 tube tages and difliculties-inherent in the use of bulbs having fiat end well which mPr1seS the Steps having curved bottoms it has been felt very deblowmg a glass heated Plastic state sirable to create a flat bottomed bulb, so much 31 its i q fi g s igg fi 40 more so that as changes in the size of the spot 6 remammg 9 1 8 O are 4 occurring in this case may be rendered negligible g igi aig gg the glass to harden wmle' g g? the a i EP di- 2. The method of making a cathoderay tube e y ng Sm e e ron op having a con1cal'body portion and a flat end wall 'Ifubes or bulbs known m the prior art which comprises the steps of blowing a heated Y 45, which the bottom in the form of a planar or and plastic t; of glass with its closed end
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2178226X | 1936-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2178226A true US2178226A (en) | 1939-10-31 |
Family
ID=7988757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US165430A Expired - Lifetime US2178226A (en) | 1936-07-16 | 1937-09-24 | Method of making flat-bottomed cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2178226A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2551279A (en) * | 1949-06-11 | 1951-05-01 | George R Miller | Manufacture of thin flat glass |
| US2939249A (en) * | 1955-11-21 | 1960-06-07 | Owens Illinois Glass Co | Means for centering hot glass parisons |
-
1937
- 1937-09-24 US US165430A patent/US2178226A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2551279A (en) * | 1949-06-11 | 1951-05-01 | George R Miller | Manufacture of thin flat glass |
| US2939249A (en) * | 1955-11-21 | 1960-06-07 | Owens Illinois Glass Co | Means for centering hot glass parisons |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2172775A (en) | Optical system | |
| GB485264A (en) | Improvements in electron-microscopy and apparatus therefor | |
| US2093288A (en) | Television apparatus | |
| US2222197A (en) | Braun tube | |
| US2167431A (en) | Method of manufacturing cathode ray tubes | |
| US2236708A (en) | Cathode ray tube vessel | |
| US2178226A (en) | Method of making flat-bottomed cathode ray tubes | |
| GB471365A (en) | Improvements in and relating to the production of fluorescent images from optical orinfra red images | |
| US2194418A (en) | Method of making a cathode-ray tube envelope | |
| US2520190A (en) | Cathode-ray tube | |
| JPH09245686A (en) | Color cathode-ray tube | |
| US3002645A (en) | Hermetic joint for glass cathode-ray tube envelope | |
| GB451451A (en) | Improvements in or relating to cathode ray tubes and methods of manufacturing the same | |
| GB463891A (en) | Improvements in or relating to cathode-ray apparatus for receiving television and the like | |
| US2697311A (en) | Method of making glass tube envelopes | |
| US2160434A (en) | Television apparatus | |
| US2663012A (en) | Projection television tube | |
| GB458744A (en) | Improvements in and relating to cathode ray tubes | |
| US2100703A (en) | Braun tube and method of producing the same | |
| US2824988A (en) | Grid structure for cathode-ray tubes | |
| FR801794A (en) | Cathode ray tube intended in particular for television applications | |
| US2232322A (en) | Television tube | |
| US2188581A (en) | Cathode ray tube | |
| US2306881A (en) | Cathode ray tube | |
| JPS6213784B2 (en) |