US3410955A

US3410955A - Component locating device

Info

Publication number: US3410955A
Application number: US378693A
Authority: US
Inventors: Donald G Mackey
Original assignee: Sylvania Electric Products Inc
Current assignee: GTE Sylvania Inc
Priority date: 1964-06-29
Filing date: 1964-06-29
Publication date: 1968-11-12
Anticipated expiration: 1985-11-12
Also published as: GB1086869A

Description

1968 D. G. MACKEY 3,410,955

KCQMPONENT LOCATING DEVICE Filed June 29, 1964 3 Sheets-Sheet 1 'INVENTOR 201mm G MACKEY ATTORN EY Nov. 12, 1968 Filed June 29, 1964 D. G. MACKEY COMPONENT LOCATING DEVICE 3 Sheets-Sheet 2 l l U l Ng/y A INVENTOR Dav/n0 6i MACKEY 31M KM ATTORN EY Nov. 12, 1968 D. G; MACKEY COMPONENT LOCATING DEVICE 3 Sheets-Sheet 5 Filed June 29, 1964 INVENTOR .Do/vnm 61. MAC/(5! ATTORNEY United States Patent 3,410,955 COMPONENT LOCATING DEVICE Donald G. Mackey, Seneca Falls, N.Y., assignor to Sylvania Electric Products Inc., a corporation of Delaware Filed June 29, 1964, Ser. No. 378,693 7 Claims. (Cl. 178-7.8)

ABSTRACT OF THE DISCLOSURE Orientation means for facilitating the location of a plurality of electron beam control components on the exterior of a cathode ray tube envelope relative to the electron gun contained therein, whereof an array of related insulative visual indicators are predeterminately spaced from one another and a common reference and adhered to the exterior surface of the tube envelope.

This invention relates to the discrete placement of operational components on the exterior of an electron discharge device and more particularly to means for externally locating beam control components on the neck of a cathode ray tube relative to the electron gun encompassed therein.

In the utilization of cathode ray tubes in commercial and entertainment applications it is necessary to accurately position several beam control components on the neck of the tube relative of specific parts of the gun structure located therein. These components, while positioned externally of the tube, function through the glass of the neck portion to influence the operation of the electron gun. For example, with reference to color cathode ray tubes as utilized in television receivers and allied applications, typical components such as a deflection yoke, a dynamic radial convergence device, a purity magnet structure, and a blue lateral magnet assembly are formed for orientation on the neck of the tube to influence the functioning of the electron gun contained therein. The location of the yoke being forward on the neck of the tube adjacent the flare is usually achieved without undue trouble; but the accurate positioning of the other abovementioned individual components is more troublesome and time consuming since part of the gun structure is obscured by an internal opaque coating. Thus a certain amount of trial and error for location adjustment is necessary to achieve the optimum operational results.

Accordingly, it is an object of the invention to providean inexpensive locating device for orienting the beam control components on the exterior of a cathode ray tube relative to the electron gun positioned therein.

A further object is to provide rapid and accurate adjustment of the beam control components on the neck of the tube.

An additional object is to provide facile forming of the device on the neck of the tube.

The foregoing objects are achieved in one aspect of the invention by the provision of a plastic sleeve formed to slip-fit the neck of the tube and be adheringly attached to the neck adjacent the base. An array of predetermined cutouts in the sleeve-type device provide a unique contrivance having visual indicators to serve the special purpose of affording accurate placement of the various control components.

For a better understanding of the present invention, together with other and further objects, advantages, and capabilities thereof, reference is made to the following disclosure and appended claims in connection with the accompanying drawings in which:

FIGURE 1 is a partial plan view of a color cathode ray tube with the external control components oriented by an embodiment of the invention;

3,410,955 Patented Nov. 12, 1968 "Ice FIGURE 2 is a partial view of the closure portion of the tube showing an alternate base;

FIGURE 3 is a plan view showing an overlay embodiment of the invention;

FIGURE 4 is a partial perspective view showing an-.

other embodiment of the invention;

FIGURE 5 is a partial plan view showing another embodiment of the invention;

FIGURE 6 is a partial plan view illustrating a template for forming another embodiment of the device;

FIGURE 7 is a partial plan view showing a tape embodiment of the invention; and

FIGURE 8 is a plan view showing means for forming the tape embodiment of the invention.

There is shown in FIGURE 1 a partial view of a color cathode ray tube 11 having a constrictive neck portion 13 and a terminal closure 15 to which a base 17 is attached. in FIGURE 2, a wafer type base 17 is shown seated against closure 15 with the tube pins 18 extending therethrough. For purpose of clarity, the internally positioned electron gun structure encompassed Within the neck portion is not shown. Likewise not shown, is an opaque coating applied to the internal wall of the tube, which extends substantially into the neck portion thereof partially obscuring the gun structure therein. Several electron ibeam control components 19 such as, the deflection yoke 21, the radial convergence device 23, the purity magnet structure 25, and the blue lateral magnet assembly 27 are discretely oriented on the exterior of neck portion 13 to provide the necessary control influences for desired tube operation. As previously mentioned, yoke 21 is easily positioned on the forward portion of neck 13, but the positioning of the remaining components is facilitated by an orientation aid.

A component locating device 29 in the form of a plastic, treated paper, or fiber, sleeve-like structure is accurately positioned on neck portion 13 being referenced from closure 15 or base 17 or 17. The sleeve device 29 has a plurality of predeterrninately circumferentially oriented

cutouts

31, 33, 35 to facilitate the precise placement of the external control components 23, 2 5, and 27, respectively. The locating device 29 may contain additional cutouts 37 to facilitate heat radiation from the interior of the tube or to afford a view of the lower portion of the electron gun structure. The invention is not restrictive to the number of cutouts.

As aforementioned, the positioning of the device is referenced from the terminal closure 15 of the tube or the base 17 or 17'. Since the internal electron gun is located accurately with respect to the closure 15, which is actually the stern wafer of the gun mount structure, referencing the device from the closure or the base enables accurate positioning of the control components relative to the gun elements. Thus when the components are positionally referenced from the base, they are also indirectly referenced from the closure which is specifically seated therein. For example, with reference to FIGURE 1, for a color cathode ray tube such as type 21CYP22, the edge of the locating device 29 is lbutted against the top edge of base 17. The reference distance A from the base to the centerline of the circumferentially situated cutouts 35 is nominally 1.406 inches. Accurate placement of the blue lateral magnet assembly 27 is achieved by positioning this component substantially over the centerline of cutouts 65, i.e., reference distance A denotes the positioning for assembly 27. Reference distance B from the centerline of cutouts 35 to the centerline of cutouts 33 is nominally 0.813 inch. Cutouts 23 facilitate precise positioning for purity magnet structure 25. Reference distance C from the centerline of cutouts 33 to the centerline of cutouts 35 is nominally 0.813 inch. Cutouts 33 is nominally 0.813 inch. Cutouts 33 facilitate vergence device 23. While the cutouts as illustrated in FIGURE 1 are somewhat wider than the components placed thereover, there is no need for them to be as such. Preferably, the cutouts should be of a width suificient to accommodate placement of the respective components. The shape of the cutouts and the plurality thereof are not material to the invention. The important criteria are that the cutouts be positioned for accurate placement of the individual components and allow for necessary circumferential adjustment of the same. As can be evidenced in FIGURE 1, it is feasible to have the locating device 29 as an integral part of base 17.

The construction of the locating device is of an insulative material such as plastic, treated paper, or glass, cellulose or synthetic fibers that will ably withstand the temperatures encountered in that portion of the tube without chemical deterioration or detrimental dimensional deviation. It has been found that tube operative temperatures on the surface of the neck 13 are substantially within the range of 1-10 to 180 degrees Fahrenheit. The device may have rigidity being formed as a cylinder or it may be as a flexible snug-fitting sleeve capable of being bonded to the neck 13. While several suitable materials have been mentioned, plastic will be considered in this description.

A flexible type of overlay device 29" is shown in FIG- URE 3 which is adaptable to wrap-around application on the neck of the tube. The aforementioned materials are suitable for this embodiment. The

cutouts

31', 33, 35', and 37 are similar to those described for locating device 29. It has been found that overlay device 29' may be successfully fabricated from Mylar polyester film as manufactured by E. I. du Pont de Nemours and Co. (Inc.), Wilmington, Delaware. The gauge of the material is not critical, but it should have suflicient body to maintain shape during application. An adhesive backing is beneficial for adherence.

Another embodiment is shown in FIGURE 4 wherein a plastic partial overlay 39, having pluralities of circumferentially oriented

cutouts

41, 43, 45, and 47 therein, is formed to partially encircle the neck 13. This partial overlay device may be rigidly formed to match the contour of the neck, or it may be of flexible wrap-around construction. Suitable materials are plastic, treated paper, or glass, cellulose or synthetic fibers. The location of the overlay device 39 is referenced from the base 17 as aforedescribed and may be bonded to the neck 13 by a suitable adhesive or retained by one or more adhesive bands 49.

Another embodiment of the device 50 may be in the form of discretely placed visual means or pairs of circumferential markings 51, 53, and suitably disposed on the neck 13 of the tube 11 to designate component positioning thereon. As shown in FIGURE 5, these markings are of substantially elongated shape but they need not be as such nor. do they need to be disposed completely about the circumference of the neck of the tube. Arcuate disposal of a minimum number suflicient to indicate component positioning is satisfactory. The radial convergence device 23 is positioned between the pairs 51; the purity magnet 25 between pairs 53 and the blue lateral magnet 27 between pairs 55.

These or similar markings may be applied by decalcomania, marking roller technique, or by use of a template 57 as illustrated in FIGURE 6. This template is preferably of flexible material such as paper, metal or plastic capable of being formed about neck 13. There are pairs of

perforations

59, 61, and 63 oriented to pro- 'vide

circumferential markings

51, 53, and 55 on the neck of the tube when a marking substance such as ink or paint is suitably applied by conventional means not shown. Edge 58 of template 57 is positioned adjacent the base 17. Reference distances A, B, and C are similar to reference distances A, B, and C as described for FIGURE 1. While pairs of marks are shown for each element of the locating device 50, a single series of marks can be utilized to position each component. In this instance, the component would cover the single marks or be positioned adjacent thereto. The shown and described marks are not to be considered as limiting.

Another embodiment 60 of the locating device is shown in FIGURE 7 wherein tape or band means 61 and 63 are adhesively bonded to the neck 13 of tube 11 in precise locations to designate the locations of the three

aforementioned components

23, 25, and 27. The tapes or

bands

61 and 63 are of plastic, suitable paper or treated glass, cellulose or synthetic fabrics and may advantageously have markings or legends 71 imprinted or embossed thereon to facilitate usage. A minimum of two bands are necessary to properly locate the three

components

23, 25, and 27. The bands may completely encircle the neck or they may be partial encirclements in the form of armate tapes. This embodiment of the device is intended to include any combination or plurality of bands that are indicative of component placement. The three

components

23, 25, and 27 shown in FIGURE 7 are oriented by reference distances A, B, and C as described for the embodiment in FIGURE 1.

Bands

61 and 63 are of specific widths to allow for the placement of the respective components adjacent the edges thereof, i.e., convergence device 23 is butted contiguous to the designated edge of band 61;

bands

61 and 63 are separated by a distance that is substantially the width of purity magnet 25 which is positioned therebetween; and the blue lateral magnet 27 is located adjacent the proper edge of band 63.

A method for discretely applying

bands

61 and 63 to the neck of the tube 11 is facilitated by a tape dispensing device 65 as illustrated in FIGURE 8. This application device is constructed to place the respective bands in proper relationship for designating component positioning in accordance with the component reference dis tances A, B, and C shown in FIGURE 7. The tube 11 is placed in cradle 67, and the closure 15 is seated in rotatable socket 69. The bands or

tapes

61 and 63 are applied by attaching the ends of the tapes to the neck 13 of the tube 11 which is suitably rotated by belt until sufficient lengths of the tapes are adhered to the neck. The tapes are then severed by conventional means not shown.

While various embodiments of a component locating device has been described wherein three components are oriented, the scope of the invention is intended to include the location of one or more components.

Thus, there is provided a component locating device that facilitates rapid and accurate placement of individual components on the neck of a cathode ray tube. The device is inexpensive to manufacture and apply, and its utilization promotes the achievement of color cathode ray tube installation and adjustment efiiciencies that have been heretofore unattained.

While there have been shown and described what are at present considered the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the invention as defined by the appended claims.

What is claimed is:

1. In combination with a cathode ray tube having a terminal closure adjacent to a constrictive neck portion wherein at least one electron gun is encompassed, means for orienting a plurality of electron beam control components relative to the exterior of said neck portion comprising:

an array of a plurality of related insulativevisual indicators predeterminately spaced in a longitudinal manner from one another and a common reference and adhered to the exterior surface of said neck portion to become an external portion thereof to facilitate accurate placement of said subsequently positioned control components on said neck portion relative to said internal gun.

2. Component orientation means according to claim 1 wherein said common reference for the spacing of said visual indicators is said terminal closure of said tube.

3. Component orientation means according to claim 1 wherein said array of visual indicators comprises specific pluralities of related circumferential markings longitudinally spaced from one another and said common reference and exteriorly adhered to said neck portion.

4. Component orientation means according to claim 1 wherein said array of visual indicators comprises a plurality of related insulative circumferential markings longitudinally spaced from one another and said common reference and exteriorly adhered to said neck portion.

5. Component orientation means according to claim 1 wherein said means of visual indication comprises at least one band of insulative material externally adhered to said neck portion and predeterminately spaced relative to said reference.

6. Component orientation means according to claim 1 wherein said array of visual indicators is in the form of an overlay having specific pluralities of circumferentially related cutouts longitudinally spaced from one another, said overlay being oriented relative to said common reference.

7. Component orientation means according to claim 6 wherein said overlay is a sleeve-like structure formed for external adherence to said neck portion.

References Cited UNITED STATES PATENTS 5/1951 Smith 335212 8/1958 Fehr 29-2516 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,410,955 November 12, 1968 Donald G. Mackey It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line 29, "of", second occurrence, should read to Column 3, lines 1 and 2, "Cutouts 33 is nominally 0.813 inch. Cutouts 33 facilitate vergence device 23." should read Cutouts 31 designate accurate positioning for the radial convergence device 23.

Signed and sealed this 3rd day of March 1970.

(SEAL) A ttest:

Edward M. Fletcher, Jr. WILLIAM E. SCHUYLEB, JR.

Attesting Officer Commissioner of Patents