US3906419A - Adjustable deflection unit for television picture tubes - Google Patents

Adjustable deflection unit for television picture tubes Download PDF

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Publication number
US3906419A
US3906419A US395897A US39589773A US3906419A US 3906419 A US3906419 A US 3906419A US 395897 A US395897 A US 395897A US 39589773 A US39589773 A US 39589773A US 3906419 A US3906419 A US 3906419A
Authority
US
United States
Prior art keywords
ring
tube
neck
inner housing
coil
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
Application number
US395897A
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English (en)
Inventor
Norbert Bissinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Deutschland GmbH
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19722248311 external-priority patent/DE2248311C3/de
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3906419A publication Critical patent/US3906419A/en
Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
Assigned to NOKIA GRAETZ GESELLSCHAFT MIT BESCHRANKTER HAFTUNG reassignment NOKIA GRAETZ GESELLSCHAFT MIT BESCHRANKTER HAFTUNG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALCATEL N.V.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • H01J29/823—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements around the neck of the tube
    • H01J29/826—Deflection arrangements

Definitions

  • Fieid 313/75 76 421 426 cludes a rotatable ring mounted on the basket and 313/427 335/212 5 having an external screw thread which is rotated through guide elements on an inner housing secured I to the coil. Rotation of the ring causes axial movement [56] References Cited of the coil and housing. Elastic safety hooks hold the ring in position and projections at the ends of the UNITED STATES PATENTS thread limit the movement.
  • Field of the Invention I v l v The present invention relates to adeflecti on unit for color television picture tubes and'particul'arly for tubes with a toroidaldeflection coil which is axially'hnd/or radially adjustable and rotatable.
  • the basket of a deflection unit has an adjusting ring with helical oblong holes distributed along the circumference. Sliding in these oblong holes are bolts which are radially attached to a ring which, in turn, is securely mounted on the coil yoke. The free ends of the bolts, which slide in the oblong holes, have a thread onto which locking nuts are screwed from the outside of the adjusting ring.
  • This type of adjusting device requires a major number of fastening bolts and a corresponding number of oblong holes in the adjusting ring if sufficient ruggedness is to be insured.
  • the device includes a ring rotatable about the longitudinal axis of the deflection unit and mounted on the coil basket.
  • the outside of the ring is provided with a screw thread whose pitch corresponds to the predetermined axial travel of the deflection coil.
  • Several guide elements are disposed symmetrically along the circumference of the internal housing in engagement with the screw thread and connected permanently with the deflection coil. In order to operate the adjusting ring, the latter has outwardly directed projections which are located at one end of each thread and serve as stops.
  • the housing has a number of nose-like projections which are distributed along the inner circumference to permit easy sliding along the coil basket.
  • FIG. 1a is a side view of the coil basket as mounted on a tube
  • FIG. 1b shows a detailed portion of FIG. 1a
  • FIG. 2 is a partial top view of the coil basket
  • FIG. 3 shows the internal housing, connected permanently with the deflection coil
  • FIG. 4 shows a partial sectional view of the assembly.
  • the deflection unit essentially comprises the coil basket 10, the internal housing 30, and the deflection coil 13, which is permanently connected with the internal housing.
  • the coil basket is supported on the television picture tube envelope l4 by legs-11 which rest on theneckofthetube. w
  • the coil basket 10 carries aring 2 on the side opposite the legs 11.
  • This ring 20 is rotatably mounted on the coil basket 10.
  • the coil basket has hooklike' guards 12, referred to as safety hooks.
  • These safety books 12 are elastic and shaped so as to yield toward the inside when the ring 20 is slipped on, then resiliently projecting beyond the rim of the ring 20.
  • the ring 20 may also have grooves 23 through which the safety hooks 12 slide as the ring is slipped on.
  • the grooves 23 lie in a circumferential area of the ring 20 which is not reached by the safety hooks 12 when the ring is turned in operation.
  • the ring 20 has a thread-like projection 21, as seen in FIGS. 1a and 1b. This thread is engaged by a guide element 31 which is a portion of the internal housing 30.
  • the guide element 31 consists of two like parts 311 and 312 for improved sturdiness.
  • the guide elements 31 slide on the thread plane, and the internal housing 30 with the deflection coil is axially shifted.
  • Conventional guides assure that no twisting of the internal housing 30 with respect to the deflection coil takes place.
  • the housing 30 has projections 32 on the inner circumference which facilitate sliding along the coil basket.
  • this adjusting device has turned out to be highly reliable in service as a result of its simple and rugged construction.
  • the fineness of adjustment depends on the choice of the thread pitch, or step-down ratio.
  • the projecting handles 22 are advantageously located at the end of the thread 21 where they simultaneously serve as stops.
  • a deflection unit for a television picture tube comprising an outer support structure secured around the neck of the tube, an inner axially adjustable housing mounted on said support structure, a deflection coil secured to said inner housing and extending around said tube neck, a ring rotatably mounted onsaid outer support about the longitudinal axis of the deflection unit and along the neck of said tube, the outside of said ring having a screw thread whose pitch corresponds to the predetermined maximum axial travel of the deflection coil and inner housing, and a plurality of longitudinal guide elements secured about the circumference of the inner housing and extending outwardly along and about said ring in sliding engagement with the screw thread to cause axial movement of said inner housing and deflection coil with rotation of said ring.
  • the device of claim 2 including two resilient safety hooks on said inner housing extending from within said ring along the neck of said tube beyond the inside diameter of the ring providing an axial stop for said ring.

Landscapes

  • Details Of Television Scanning (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
US395897A 1972-10-02 1973-09-10 Adjustable deflection unit for television picture tubes Expired - Lifetime US3906419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722248311 DE2248311C3 (de) 1972-10-02 Ablenkeinheit für Farbfern Sehrohren

Publications (1)

Publication Number Publication Date
US3906419A true US3906419A (en) 1975-09-16

Family

ID=5858005

Family Applications (1)

Application Number Title Priority Date Filing Date
US395897A Expired - Lifetime US3906419A (en) 1972-10-02 1973-09-10 Adjustable deflection unit for television picture tubes

Country Status (5)

Country Link
US (1) US3906419A (enrdf_load_stackoverflow)
FR (1) FR2201537B3 (enrdf_load_stackoverflow)
GB (1) GB1440787A (enrdf_load_stackoverflow)
IT (1) IT993451B (enrdf_load_stackoverflow)
NL (1) NL7313557A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973231A (en) * 1974-08-27 1976-08-03 Fuji Photo Optical Co., Ltd. Position adjusting device for image pickup tube coil assembly
US3992578A (en) * 1976-01-08 1976-11-16 General Instrument Of Canada Ltd. Yoke mounting apparatus
US4006301A (en) * 1976-01-16 1977-02-01 Zenith Radio Corporation Yoke adjusting apparatus for a color TV picture tube
US4130837A (en) * 1976-06-10 1978-12-19 International Standard Electric Corporation Arrangement for mounting the deflection system on the envelope of a color-picture tube

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568631A (en) * 1950-01-27 1951-09-18 Admiral Corp Focus coil support and control
US2694782A (en) * 1951-05-19 1954-11-16 All Star Products Inc High efficiency magnetic focusing device for cathode-ray tubes
US2817034A (en) * 1952-10-23 1957-12-17 Cossor Ltd A C Magnetic focussing field arrangements for cathode ray tubes
US3582848A (en) * 1969-01-13 1971-06-01 Illinois Tool Works Mounting assembly for magnetic deflection yoke
US3772978A (en) * 1972-10-30 1973-11-20 H Mito Operation device for objective lens of camera

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568631A (en) * 1950-01-27 1951-09-18 Admiral Corp Focus coil support and control
US2694782A (en) * 1951-05-19 1954-11-16 All Star Products Inc High efficiency magnetic focusing device for cathode-ray tubes
US2817034A (en) * 1952-10-23 1957-12-17 Cossor Ltd A C Magnetic focussing field arrangements for cathode ray tubes
US3582848A (en) * 1969-01-13 1971-06-01 Illinois Tool Works Mounting assembly for magnetic deflection yoke
US3772978A (en) * 1972-10-30 1973-11-20 H Mito Operation device for objective lens of camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973231A (en) * 1974-08-27 1976-08-03 Fuji Photo Optical Co., Ltd. Position adjusting device for image pickup tube coil assembly
US3992578A (en) * 1976-01-08 1976-11-16 General Instrument Of Canada Ltd. Yoke mounting apparatus
US4006301A (en) * 1976-01-16 1977-02-01 Zenith Radio Corporation Yoke adjusting apparatus for a color TV picture tube
US4130837A (en) * 1976-06-10 1978-12-19 International Standard Electric Corporation Arrangement for mounting the deflection system on the envelope of a color-picture tube

Also Published As

Publication number Publication date
AU6098073A (en) 1975-04-10
IT993451B (it) 1975-09-30
FR2201537B3 (enrdf_load_stackoverflow) 1976-08-27
DE2248311B2 (de) 1976-05-20
FR2201537A1 (enrdf_load_stackoverflow) 1974-04-26
DE2248311A1 (de) 1974-04-18
NL7313557A (enrdf_load_stackoverflow) 1974-04-04
GB1440787A (en) 1976-06-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311

AS Assignment

Owner name: NOKIA GRAETZ GESELLSCHAFT MIT BESCHRANKTER HAFTUNG

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALCATEL N.V.;REEL/FRAME:007074/0030

Effective date: 19890130