US3716662A

US3716662A - Support and high voltage protective means for a cathode ray tube

Info

Publication number: US3716662A
Application number: US00135992A
Authority: US
Inventors: A Johnson
Original assignee: GTE Sylvania Inc
Current assignee: GTE Sylvania Inc
Priority date: 1971-04-21
Filing date: 1971-04-21
Publication date: 1973-02-13
Anticipated expiration: 1990-02-13

Abstract

Supportive and protective means for mounting a cathode ray tube is formed of insulative material in a manner to have a planar mounting portion with an integral collar-like portion protruding therefrom. The mounting portion has an opening therethrough to accommodate the face portion of the tube. The collarlike portion is peripheral to the opening thereby providing encompassment of the face and forward portions of the tube. One area of the collar has a pocket formed therein to provide protection for the anode connection.

Description

United States ?atent 1191 Johnson 1 1 Feb. 13, 1973 54] SUPPORT AND HIGH VOLTAGE 3,606,241 8/l952 Steinke ..17s 7.s2

PROTECTIVE MEANS FOR A 3,140,140 7/1964 KOhlCl' et al. ..337/2l8 R CATHODE RAY TUBE FOREIGN PATENTS OR APPLlCATlONS [75] Q'g Seneca 69,723 ll/l958 France ..17s/7.s [73] Assignee: GTE Sylvania Incorporated Primary L- Gfiffin Assistant Examiner-Joseph A. Orsino, Jr. [22] F'ledi 1971 Attorney-Norman J. O'Malley, Donald R. Castle and 21 Appl. No.: 135,992 Frederlck 57 ABSTRACT 52] US. Cl. ..l78/7.8, l78/7.82, 339/60 51 11m. 01 ..H04n 5/645 SuPPwwe and mommy: means "munmg [58] Field of Search 178 8 7 82 7 313/64 cathode ray tube is formed of insulative material in a 339/60 R,6l R,6l L, l43 T, 149 R, 218 R,

manner to have a planar mounting portion with an integral collar-like portion protruding therefrom. The

2l8 L mounting portion has an opening therethrough to ac- 56 R f Ct d commodate the face portion of the tube. The collar- 1 eerences like portion is peripheral to the opening thereby UNITED STATES PATENTS providing encompassment of the face and forward portions of the tube. One area of the collar has a 2,497,660 2/1950 Devine ..l78/7.82 pocket formed therein to provide protection f0! the 3,539,720 11 1970 Marshall ....l78/7,8 anode Connection, 3,404,227 10/1968 Alcala et al. ....l78/7.8 2,797,408 6/ 1957 Greatbatch et al ..l78/7.82 2 Claims, 3 Drawing Figures J x v 3 I 57 3 l 4s 9 a 15 PATENTE FEB] 3197s l g I.

INVENTOR. L FRED D. JOHNSON ATTORNEY SUPPORT AND HIGH VOLTAGE PROTECTIVE MEANS FOR A CATI'IODE RAY TUBE BACKGROUND OF THE INVENTION sarily positioned in close relationship with one another.

Such compaction is particularly evidenced in those usages wherein small size cathode ray tubes are employed, i.e., tubes having image areas diametrically dimensioned, for example, 6 inches and under. Even though such tubes are relatively small, they often operate above KV, and usually have a high voltage anode connection proximal to the face portion. The space between the deflection yoke and the conventional type of mounting bracket or metallic strap is often of such close spacing that adequate high voltage isolation is difficult to achieve. As a result, deleterious arcing is sometimes prevalent between the anode connection and the yoke or the metallic mounting means.

OBJECTS AND SUMMARY OF THE INVENTION It is an object of the invention to reduce the aforementioned disadvantages and to provide both a supportive and high voltage protective means for mounting a cathode ray tube having an anode connection proximal to the face portion thereof. Another object is to provide an electron image device having protective mounting means integral therewith. A further object is to provide impact and abrasion protection for the forward end of the tube.

The foregoing objects are achieved in one aspect of the invention by utilizing a cathode ray tube mounting means made of insulative material and formed to have a substantially planar mounting portion with a protruding collar-like portion integral thereto. The mounting portion is formed to have an opening therethrough to accommodate the face portion of the tube. The integral collar-like portion is substantially peripheral to the opening thereby providing peripheral encompassment of the face and forward portions of the tube envelope. At one area on the collar there is an outward protrusion formed to provide a protective pocket for the anode connection.

BRIEF DESCRIPTION OFTHE DRAWINGS FIG. 1 is a plan view of the cathode ray tube mounting means;

FIG. 2 is an elevation of the mounting means taken along the line 22 of FIG. 1; and

FIG. 3 is a sectional view of the mounting means taken along the line 33 of FIG. 1 illustrating a cathode ray tube positionally affixed therein to provide an electron image device having protective mounting means.

DESCRIPTION OF THE PREFERRED EMBODIMENT For a better understanding of the present invention, together with other and further objects, advantages and capabilities thereof, reference is made to the following specification and appended claims in connection with the aforedescribed drawings.

With reference to the drawings, there is shown in FIGS. 1 and 2 a supportive and protective mounting means 1 l for positioning a cathode ray tube 13 as illustrated in FIG. 3. The cathode ray tube 13 has a high voltage anode connection 15 proximal to the face portion 17 thereof.

The mounting means 11 is fabricated of insulative plastic material exhibiting rigidity and dimensional stability; for example, a polycarbonate such as Lexan" as formulated by the General Electric Company, Pittsfield, Massachusetts.

An element of the mounting means 11, is'a substantially planar mounting portion 21 which is formed to have a defined opening 23 therethrough of a size and shape to accommodate the translucent face portion 17 of the cathode ray tube 13. While the opening 17 is shown as being substantially round, it is not limited to such. In this specification, the term periphery" is intended to be definitive of any shape of perimetric configuration in keeping with the shape of the tube face portion accommodated therein.

Oriented in the mounting portion 21, are a plurality of spaced apart mounting provisions 25 shaped to facilitate attachment of the mounting means 11 to a suitable support medium, not shown. As illustrated, the mounting provisions 25 are in the form of discretely placed holes, but such are not to be considered limiting as other manifestations such as lugs, tabs, ears, or pedate-type structures are also applicable.

Integral with the mounting portion 21 is a collar-like upstanding wall portion 29 oriented substantially peripheral to the opening 23 to provide peripheral encompassment of the face 17 and forward 19 portions of the envelope of the tube 13. The collar portion 29 protrudes from the mounting portion 29 in a manner substantially normal to the plane thereof as evidenced by the right angular relationship angle 6 therebetween. The opening 23 which accommodates the tube face portion 17 is of a dimension x which is smaller than the internal dimension y of the collar portion 29. Likewise, the external dimension x of the forward portion 19 of the tube is also smaller than the internal dimension y of the collar 29, thereby providing a channel 39 between the collar and the tube to retain the required amount of bonding material for effecting subsequent attachment of the tube 13 to the mounting means 11.

Included in the collar portion 29 is a specific provision 31 formed or molded at one area therein to accommodate and protect the anode connection 15. This provision 31 is discretely shaped as an outward protrusion to provide an open pocket in the collar material. The opening of said pocket facing rearward from said mounting portion 21. The pocket sidewall 33 has an opening or aperture 35 therethrough to accommodate external extension of the insulated anode connective lead 37 from the pocket. It is to be noted-that the collar portion 29, including the pocket 31, has a height h which is sufficient to adequately extend beyond the area of the anode connection 15 to provide the insulative protective pocket therefor and also effect impact and abrasion protection for the forward end of the tube.

With particular reference to FIG. 3, there is shown an electron image device with protective mounting means 41. The structure comprises the tube 13 oriented in the mounting means 11 in a manner whereby the tube face portion 17 is within the. opening 23. The anode connective lead 37 is attached to the anode connection within the pocket enclosure 31 and is extended exteriorly through the aperture 35. The pocket 31 and the channel 39, which opens thereinto, is filled with an insulative bonding and potting material 43 which is capable of withstanding the environmental considerations encountered during utilization of the device. A suitable bonding encapsulant for this usage is, for example, DER759/DEH59 resin-hardner material available from Dow Chemical Company, Midland, Michigan. It is to be noted that the anode connective lead is positioned within the pocket in a manner to exit therefrom at an angular orientation differing from that at which it enters the pocket thereby achieving lateral compaction of the structure and effecting secure positioning of the anode lead within the pocket.

Thus,'the high voltage anode connection is insulated by encapsulation and there is provided an improved supportive and high voltage protective means for mounting a cathode ray tube in a confined environment. The resultant electron image device having integral mounting means is an advantageous solution to an arcing problem which is often prevalent in compact electronic equipment.

While there has 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 scope of the invention as defined by the appended claims.

lclaim:

1. Supportive and high voltage protective means for mounting a cathode ray tube having an anode connection proximal to the face portion thereof, said means being formed of insulative material comprising:

a substantially planar mounting portion having front and rear surfaces and formed to define an opening therethrough dimensioned to accommodate the face portion of said tube, said mounting portion having a plurality of spaced apart mounting provisions shaped to facilitate attachment of said mounting means to a support medium;

collar-like portion formed as an upstanding sidewall integral with the rear surface of said mounting portion in a manner substantially peripheral to said opening to provide peripheral encompassment of said face and forward portions of said tube envelope, said collar being substantially normal to the plane of said mounting portion; and

a specific provision formed in one area of said collar portion as an outward protrusion to provide an open pocket in said peripheral encompassment, said pocket being oriented to open away from the rear surface of said mounting portion, the sidewall face portion; Q a substantially planar mounting portion having front and rear surfaces and formed of insulative material in a manner to define an opening therethrough to accommodate said face portion, said mounting portion having a plurality of spaced apart mounting provisions shaped to facilitate attachment of said mounting means to a support medium;

collar-like portion formed as an upstanding sidewall integral with the rear surface of said mounting portion in a manner substantially peripheral to said opening to provide peripheral encompassment of said face and forward portions of said tube envelope effecting protection therefor, said collar being substantially normal to the plane of said mounting portion; an outward protrusion formed in one area of said upstanding collar sidewall portion to provide an open pocket in said peripheral encompassment in the region adjacent said anode connection to provide accommodation and protection for said anode connection, said open pocket being oriented to open away from the rear surface of said mounting portion, said pocket protrusion having an aperture in the sidewall thereof; an insulated external anode connective lead extending through said sidewall aperture insaid protrusion, said connective lead being positioned within said pocket in a manner to exit therefrom at an angular orientation differing from that at which it enters said pocket thereby achieving lateral compaction of the mounting means and effecting secure positioning of the lead within said pocket; and insulative bonding means effecting the attachment of said face and forward funnel portions of said tube envelope to the interior of said collar-like portion, said pocket being filled with said 'insulative bonding material to insulate said anode connection and securely anchor the same therein.

I i =8 l l 1

Claims

1. Supportive and high voltage protective means for mounting a cathode ray tube having an anode connection proximal to the face portion thereof, said means being formed of insulative material comprising: a substantially planar mounting portion having front and rear surfaces and formed to define an opening therethrough dimensioned to accommodate the face portion of said tube, said mounting portion having a plurality of spaced apart mounting provisions shaped to facilitate attachment of said mounting means to a support medium; a collar-like portion formed as an upstanding sidewall integral with the rear surface of said mounting portion in a manner substantially peripheral to said opening to provide peripheral encompassment of said face and forward portions of said tube envelope, said collar being substantially normal to the plane of said mounting portion; and a specific provision formed in one area of said collar portion as an outward protrusion to provide an open pocket in said peripheral encompassment, said pocket being oriented to open away from the rear surface of said mounting portion, the sidewall of said pocket having an aperture therein to accommodate and provide protection for said anode connection; said pocket being filled with insulative material to insulate said anode connection and securely anchor the same therein.