JPS60134585A - Degaussing device - Google Patents

Degaussing device

Info

Publication number
JPS60134585A
JPS60134585A JP24320783A JP24320783A JPS60134585A JP S60134585 A JPS60134585 A JP S60134585A JP 24320783 A JP24320783 A JP 24320783A JP 24320783 A JP24320783 A JP 24320783A JP S60134585 A JPS60134585 A JP S60134585A
Authority
JP
Japan
Prior art keywords
degaussing
manual
coil
turned
time
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.)
Granted
Application number
JP24320783A
Other languages
Japanese (ja)
Other versions
JPH0218797B2 (en
Inventor
Shigeo Sugiura
杉浦 重男
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP24320783A priority Critical patent/JPS60134585A/en
Publication of JPS60134585A publication Critical patent/JPS60134585A/en
Publication of JPH0218797B2 publication Critical patent/JPH0218797B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To operate effectively a degaussing device by using one degaussing coil for both applications of automatic degaussing and manual degaussing so as to decrease a rush current flowing to a power switch at application of current. CONSTITUTION:When the power switch 2 is applied, a monitor main body 3 is operated and a delay timer 10 is started. The timer 10 activates a relay 12 after a prescribed time, a current flows to a degaussing element 13 and a degaussing coil 14 so as to attain automatic degaussing. In case of the manual degaussing since the timer 10 is turned off at a time T3, the cooling is finished for the degaussing element 13 soon and when the relay 12 is activated again by turning on the manual degaussing switch 11 at a time T4, a current flows to the degaussing coil 14 so as to attain degaussing. Then after the end of degaussing since the timer 10 deenergizes the relay 12 at a time T5, the manual degaussing is repeated for any number of times.

Description

【発明の詳細な説明】[Detailed description of the invention]

産業上の利用分野 本発明は、カラーディスプレイモニタ(以下「モニタ」
と呼ぶ)に於ける遅延タイマ装置と手動スイッチとを備
えた消磁装置に関するものである。 従来例の構成とその問題点 近年、端末機器としモニタが多く利用されるようになっ
てきた。このモニタは、地磁気の影響を避けるため、消
磁装置を備えているのが一般である。消lit&装置と
して広く用いられているのは、正特性感熱素子と消磁コ
イルとを用いたもので、電源投入時に、常温特低抵抗値
を有する正特性感熱素子に突入電流を流し、消磁を行わ
せる方法である。しかしこのような消磁装置では、一旦
電源投入した後は、正特性感熱素子が自己発熱により高
抵抗値を維持するため、再び消磁をすることができない
、即ち、モニタを使用中、モニタの向きを変えた時に生
ずる着磁を消すことができないという不便があった。 そこで従来、手動消磁スイッチと消磁素子と消磁コイル
とを備えたものも使われていた。この手動消磁装置につ
いて第1図を用いて説明づる。電流プラグ1を電源コン
セントに差し込み、電源スィッチ2を投入すると、モニ
タ本体3が動作し、同時に正特性感熱素子からなる消磁
素子4及び消磁コイル5に電流が流れ、消磁が行なわれ
る。 (この消磁を以下「自動消磁」と呼ぶ)。次に、任意の
時間に再度消磁をしたい時に、手動消磁スイッチ6を投
入すると、消磁素子7及び消磁コイル8にて消磁が行わ
れる。9はモニタに内蔵された自動消磁装置と手動消磁
装置とからなる消磁装置であ−る。 しかしながら、上記のような従来の構成においては、手
動消磁用の消磁素子7と消磁コイル8とが自動消磁用の
消磁素子4と消磁コイル5との外に必要であり、経済的
に高価であった。更に、電源投入時に、モニタ本体3に
流れる突入電流と自動消磁用の消磁素子5に流れる突入
電流とが重畳し、電源スィッチ2として大電流容量のス
イッチを用いる必要があった。 上記従来装置の動作タイミングについて第2図を参照し
て説明すると、時刻T1にて電源を投入した時、モニタ
本体3には第2図イのようにAアンペアの突入電流が流
れ、同詩に、消磁コイル5には第2図口のようにBアン
ペアの突入電流が流れるので、電源スィッチ2には(A
十B)アンペアの突入電流が流れる。 このため、1個の消磁素子と1個の消磁コイルとにより
、自動消磁と手動消磁との両方が行なえ、且つ電源投入
時の突入電流を軽減できる消磁装置が望まれていた。 発明の目的 本発明は上記従来の欠点を解消するもので、1個の消磁
コイルを自動消磁と手動消磁との両方の用途に用いて部
品数を削減でき、しかも電源投入時に電源スィッチに流
れる突入電流を削減できる消磁装置を提供することを目
的とする。 発明の構成 本発明の消磁装置は、電源投入時から所定時間経過後お
よび消磁用スイッチの動作時からそれぞれ一定時間の間
スイッチ手段を動作させる遅延タイマと、前記スイッチ
手段により1個の消磁素子を介して通電される1個の消
磁コイルとを備えた構成である。 かかる構成によれば、自動消磁と手動消磁とを共通の消
磁素子と消磁コイルとを利用して行なえ、且つ電源投入
時の消磁コイルへ流れる突入電流を遅延タイマにより遅
延させて、電源スィッチの電流容量を軽減できるもので
ある。 実施例の説明 以下、本発明の一実施例について、図面に基づいて説明
する。 第3図は本発明の一実施例における消磁装置の回路ブロ
ック図であり、第1図に示す構成要素と同一の構成要素
には同一の符号を付してその説明を省略する。第3図に
おいて、10は遅延タイマ、11は手動消磁用スイッチ
、12はリレー、13は正特性感熱素子からなる消磁素
子、14は消磁コイルであり、これらにより消磁装置1
5が構成されている。 まず電流スイッチ2が投入されると、モニタ本体3が動
作し、遅延タイマ1Oが起動される。遅延タイマ10は
、一定の時間後リレー12を動作させ、消磁素子13と
消磁コイル14とに電流を流し、自動消磁が行なわれる
。この時のタイミングを第4図により説明する。電源ス
イツチ投入時T1には、第2図イのようにモニタ本体3
にAアンペアの突入電流が流れるのみで、この時点では
消磁コイル14には、まだ電流が流れない。時刻1−2
になって、遅延タイマ10がリレー12を動作させ、第
4図1」のように消磁]イル14にBアンペアの突入電
流が流れる。この場合、突入電流は、従来例のように重
畳されることはないので、AアンペアまたはBアンペア
のみの突入電流に緩和される。 次に手動消磁について説明すると、時刻T3にて遅延タ
イマ10がオフになるので、消磁素子13は暫くして(
通常15分)冷却が完了し、時刻T4にて手動消磁用ス
イッチ11をオンして再びリレー12をオンさせると、
消磁コイル14に電流が流れ、消磁が行われる。消磁完
了後、時刻]−5にて遅延タイマ10がリレー12をオ
フさせるので、何度でも手動消磁を繰り返すことができ
る。従って、モニタ使用中に着磁したい場合、手動消磁
スイッチ11をオンすることにより容易に消磁できる。 次に8!j磁装置の具体回路例について第5図を用いて
説明する。第5図にJ3いて、Qlは極付反転アンプを
構成するトランジスタ、R’+ 、C1は遅延時定数を
きめる抵抗およびコンデンサ、R2゜C2はリセットの
時定数をきめる抵抗および]ンデン1ノ、C2はリレー
12を駆動−りるためのトランジスタである。またDl
、D2はダイオード、R3−R8は抵抗、03〜C5は
コンデンサである。 まず電源プラグ1をN源に挿入し、電源スイッチ2を投
入すると、モニタ本体3より供給される+5vの電圧が
抵抗[で1を通ってコンデンサC1を充電し始める。コ
ンデンサCが
Industrial Application Field The present invention relates to a color display monitor (hereinafter referred to as a "monitor").
The invention relates to a degaussing device equipped with a delay timer device and a manual switch in Conventional configurations and their problems In recent years, monitors have been increasingly used as terminal equipment. This monitor is generally equipped with a degaussing device to avoid the influence of earth's magnetic field. The device that is widely used as an eraser device uses a positive temperature sensitive element and a degaussing coil.When the power is turned on, an inrush current is passed through the positive temperature sensitive element, which has a particularly low resistance value at room temperature, to perform demagnetization. This is a method to However, with such a degaussing device, once the power is turned on, the positive temperature sensitive element maintains a high resistance value due to self-heating, so it cannot be degaussed again. There was an inconvenience that the magnetization that occurs when changing the magnet cannot be erased. Therefore, conventionally, devices equipped with a manual degaussing switch, a degaussing element, and a degaussing coil have been used. This manual degaussing device will be explained with reference to FIG. When the current plug 1 is inserted into a power outlet and the power switch 2 is turned on, the monitor main body 3 operates, and at the same time, current flows through the demagnetizing element 4 and the demagnetizing coil 5, which are positive temperature sensitive elements, and demagnetization is performed. (This demagnetization is hereinafter referred to as "automatic demagnetization"). Next, when degaussing is desired again at any time, when the manual degaussing switch 6 is turned on, degaussing is performed by the degaussing element 7 and the degaussing coil 8. Reference numeral 9 denotes a degaussing device which includes an automatic degaussing device and a manual degaussing device built into the monitor. However, in the conventional configuration as described above, the degaussing element 7 and degaussing coil 8 for manual degaussing are required in addition to the degaussing element 4 and degaussing coil 5 for automatic degaussing, and are economically expensive. Ta. Furthermore, when the power is turned on, the inrush current flowing through the monitor body 3 and the inrush current flowing through the automatic degaussing element 5 are superimposed, making it necessary to use a switch with a large current capacity as the power switch 2. To explain the operation timing of the above conventional device with reference to Fig. 2, when the power is turned on at time T1, an inrush current of A ampere flows through the monitor body 3 as shown in Fig. 2 A, and as shown in the same poem, , an inrush current of B amperes flows through the degaussing coil 5 as shown in Figure 2, so the power switch 2 receives (A
10B) An inrush current of ampere flows. Therefore, there has been a demand for a demagnetizing device that can perform both automatic demagnetization and manual demagnetization using one demagnetizing element and one demagnetizing coil, and can reduce the rush current when the power is turned on. OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional technology.One degaussing coil can be used for both automatic degaussing and manual degaussing, thereby reducing the number of parts. The purpose is to provide a degaussing device that can reduce current. Structure of the Invention The degaussing device of the present invention includes a delay timer that operates a switch means for a predetermined time after a predetermined time has elapsed since the power is turned on, and for a predetermined time after the operation of a degaussing switch, and one degaussing element by the switch means. This configuration includes one degaussing coil that is energized through the degaussing coil. According to this configuration, automatic degaussing and manual degaussing can be performed using a common degaussing element and degaussing coil, and the rush current flowing to the degaussing coil when the power is turned on is delayed by the delay timer, so that the current of the power switch is This allows the capacity to be reduced. DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a circuit block diagram of a degaussing device according to an embodiment of the present invention, and the same components as those shown in FIG. 1 are given the same reference numerals and their explanations will be omitted. In FIG. 3, 10 is a delay timer, 11 is a manual degaussing switch, 12 is a relay, 13 is a degaussing element consisting of a positive temperature sensitive element, and 14 is a demagnetizing coil.
5 are configured. First, when the current switch 2 is turned on, the monitor main body 3 operates and the delay timer 1O is activated. The delay timer 10 operates the relay 12 after a certain period of time, and current flows through the demagnetizing element 13 and the demagnetizing coil 14, so that automatic demagnetization is performed. The timing at this time will be explained with reference to FIG. At T1 when the power switch is turned on, the monitor body 3 is turned on as shown in Figure 2 A.
Only an inrush current of A ampere flows through the degaussing coil 14, and no current flows through the degaussing coil 14 at this point. Time 1-2
Then, the delay timer 10 operates the relay 12, and an inrush current of B amperes flows through the demagnetizing coil 14 as shown in FIG. In this case, the inrush current is not superimposed as in the conventional example, so the inrush current is reduced to only A ampere or B ampere. Next, manual degaussing will be explained. Since the delay timer 10 is turned off at time T3, the degaussing element 13 is turned off after a while (
When cooling is completed (usually 15 minutes) and the manual degaussing switch 11 is turned on at time T4 and the relay 12 is turned on again,
A current flows through the demagnetizing coil 14, and demagnetization is performed. After the degaussing is completed, the delay timer 10 turns off the relay 12 at time]-5, so manual degaussing can be repeated as many times as desired. Therefore, if it is desired to magnetize the monitor while in use, it can be easily demagnetized by turning on the manual demagnetization switch 11. Next is 8! A specific circuit example of the j-magnetic device will be explained using FIG. In Fig. 5, at J3, Ql is a transistor constituting a polarized inverting amplifier, R'+, C1 are a resistor and capacitor that determine the delay time constant, R2°C2 is a resistor that determines the reset time constant, and C2 is a transistor for driving the relay 12. Also Dl
, D2 is a diode, R3-R8 are resistors, and 03 to C5 are capacitors. First, when the power plug 1 is inserted into the N source and the power switch 2 is turned on, the +5V voltage supplied from the monitor body 3 passes through the resistor 1 and begins to charge the capacitor C1. Capacitor C is

【Cからなる遅延タイマ10のしきい値電
圧まで充電されると、遅延タイマ10の3番ビンより、
リセットがかかり、遅延タイマ10013番ビンがハイ
状態となる。従ってトランジスタQ2がオンとなり、リ
レー12を駆動し、消磁素子13と消磁コイル14とに
電流が流れ、自動消磁が行われる。この時、第4図にお
ける遅延時間(11〜12間)は、抵抗R1とコンデン
サC1とにより希望の値に選べる。本実施例では3.9
秒に選んである。 次に抵抗R2とコンデンサC2どの時定数(本実施例は
3.9秒)後に遅延タイマ1Oの13番ビンがローにセ
ットされ、トランジスタQ2はオフとなる。 暫くして(約15分侵)消磁素子13が充分冷却された
後、手動消磁スイッチ11をオンづると、一旦接触した
接点が離れた瞬間、トランジスタQ1のコレクタ側に正
のパルスが現われ、結合コンデンサC5を通って遅延タ
イマ10の2番ビンに正のパルスが加わり、遅延タイマ
10の13番ビンをハイに覆る。したがってトランジス
タQ2がオンされ、リレ〜12がオンし、手動消磁が行
われる。この後、抵抗R2とコンデンサC2とで決めら
れた時定数により、再び遅延タイマ10の13番ビンが
ローとなり、始めの状態に戻る。このように本実施例に
よれば、電源投入時の突入電流を軽減することができ、
且つ、自動消磁と手動消磁とを、共通の消磁素子13と
消磁コイル14とを利用して行なっているので、従来1
例に比し、その経済的効果は大なるものがある。 発明の詳細 な説明したように本発明によれば、電源投入時の突入電
流を削減できると共に、手動消磁と自動消磁とを同一の
消磁コイルを用いて行なうことができ、したがってまず
モニタの突入電流を削減できるため、電源スイッチの電
流容量を軽減できるばかりでなく、モニタを複数台−緒
にシステムとして使う場合、システムの突入電流容量を
軽減できる。またモニタの使用中に、モニタの向きを変
えて省磁した場合に、手動の消磁スイッチをAンするこ
とにより容易に消磁できる装置を、高価な消磁:】イル
1個にて実現でき、その経済的効果は非常に大である。
[When charged to the threshold voltage of the delay timer 10 consisting of C, from the third bin of the delay timer 10,
A reset is applied and the 10013th bin of the delay timer becomes high. Therefore, transistor Q2 turns on, drives relay 12, current flows through demagnetizing element 13 and demagnetizing coil 14, and automatic demagnetization is performed. At this time, the delay time (between 11 and 12) in FIG. 4 can be selected to a desired value by using the resistor R1 and the capacitor C1. In this example, 3.9
It was selected in seconds. Next, after a certain time constant (3.9 seconds in this embodiment) of the resistor R2 and the capacitor C2, the 13th bin of the delay timer 1O is set to low, and the transistor Q2 is turned off. After a while (approximately 15 minutes), after the degaussing element 13 has been sufficiently cooled, when the manual degaussing switch 11 is turned on, a positive pulse appears on the collector side of the transistor Q1 at the moment when the contacts are separated, and the connection is terminated. A positive pulse is applied to the 2nd bin of the delay timer 10 through capacitor C5, causing the 13th bin of the delay timer 10 to go high. Therefore, transistor Q2 is turned on, relay ~12 is turned on, and manual demagnetization is performed. After this, the 13th bin of the delay timer 10 becomes low again due to the time constant determined by the resistor R2 and the capacitor C2, and the state returns to the beginning. As described above, according to this embodiment, it is possible to reduce the rush current when the power is turned on,
In addition, since automatic demagnetization and manual demagnetization are performed using a common demagnetization element 13 and demagnetization coil 14, conventional demagnetization
Compared to other examples, the economic effects are significant. DETAILED DESCRIPTION OF THE INVENTION As described in detail, according to the present invention, inrush current at power-on can be reduced, and manual degaussing and automatic degaussing can be performed using the same degaussing coil. This not only reduces the current capacity of the power switch, but also reduces the inrush current capacity of the system when multiple monitors are used together as a system. In addition, when the monitor is used to save magnetism by changing its orientation, a device that can easily demagnetize by turning on the manual degaussing switch can be realized with a single expensive demagnetizer. The economic effect is very large.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の消磁装置の回路構成図、第2図は第1図
に示1回路の動作タイミングを示すタイミングチャー]
〜、第3図は本発明の一実施例にお()る消磁装置の回
路構成図、第4図は第3図に示す回路の動作タイミング
を示すタイミングチャー1〜、第5図は本発明の一実施
例における消磁装置の具体回路図である。 10・・・遅延タイマ、11・・・手動消磁用スイッチ
、12・・・リレー、13・・・消磁素子、14・・・
消磁コイル、15・・・消磁装置 代理人 森 本 義 弘 第1図 第3図 第2図
Figure 1 is a circuit configuration diagram of a conventional degaussing device, and Figure 2 is a timing chart showing the operation timing of one circuit shown in Figure 1]
~, Figure 3 is a circuit configuration diagram of a degaussing device according to an embodiment of the present invention (2), Figure 4 is a timing chart 1 ~ showing the operation timing of the circuit shown in Figure 3, and Figure 5 is a diagram of the present invention. FIG. 2 is a specific circuit diagram of a degaussing device in one embodiment. DESCRIPTION OF SYMBOLS 10... Delay timer, 11... Manual degaussing switch, 12... Relay, 13... Demagnetizing element, 14...
Degaussing coil, 15... Demagnetizing device agent Yoshihiro Morimoto Figure 1 Figure 3 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 1、電源投入時から所定時間経過後および消磁用スイッ
チの動作時からそれぞれ一定時間の間スイッチ手段を動
作させる遅延タイマと、前記スイッチ手段により1個の
消磁素子を介して通電される1個の消磁コイルとを備え
た消磁装置。
1. A delay timer that operates the switch means for a predetermined time after a predetermined time has elapsed since the power is turned on and for a predetermined time after the operation of the degaussing switch, and one degaussing element that is energized by the switch means through one degaussing element. A degaussing device equipped with a degaussing coil.
JP24320783A 1983-12-22 1983-12-22 Degaussing device Granted JPS60134585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24320783A JPS60134585A (en) 1983-12-22 1983-12-22 Degaussing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24320783A JPS60134585A (en) 1983-12-22 1983-12-22 Degaussing device

Publications (2)

Publication Number Publication Date
JPS60134585A true JPS60134585A (en) 1985-07-17
JPH0218797B2 JPH0218797B2 (en) 1990-04-26

Family

ID=17100421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24320783A Granted JPS60134585A (en) 1983-12-22 1983-12-22 Degaussing device

Country Status (1)

Country Link
JP (1) JPS60134585A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760489A (en) * 1987-06-12 1988-07-26 Rca Licensing Corporation Video display degaussing apparatus
JPS6462994A (en) * 1987-09-03 1989-03-09 Anritsu Corp Demagnetizing circuit for color crt
JPH01137896A (en) * 1987-11-25 1989-05-30 Mitsubishi Electric Corp Demagnetizer for color cathade-ray tube
JPH01105283U (en) * 1987-12-28 1989-07-14
US4999732A (en) * 1987-11-13 1991-03-12 Murata Manufacturing Co., Ltd. Degaussing circuit for CRT
US5499156A (en) * 1994-11-18 1996-03-12 Hughes Aircraft Company Forced, resonant degaussing system and method
US5995358A (en) * 1996-10-01 1999-11-30 Parc D'activites De La Grande Ile Demagnetizable electropermanent magnetic holder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388526A (en) * 1977-01-14 1978-08-04 Philips Nv Degaussing circuit
JPS5839185A (en) * 1981-09-02 1983-03-07 Matsushita Electric Ind Co Ltd Degaussing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388526A (en) * 1977-01-14 1978-08-04 Philips Nv Degaussing circuit
JPS5839185A (en) * 1981-09-02 1983-03-07 Matsushita Electric Ind Co Ltd Degaussing device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760489A (en) * 1987-06-12 1988-07-26 Rca Licensing Corporation Video display degaussing apparatus
JPS6462994A (en) * 1987-09-03 1989-03-09 Anritsu Corp Demagnetizing circuit for color crt
US4999732A (en) * 1987-11-13 1991-03-12 Murata Manufacturing Co., Ltd. Degaussing circuit for CRT
JPH01137896A (en) * 1987-11-25 1989-05-30 Mitsubishi Electric Corp Demagnetizer for color cathade-ray tube
JPH01105283U (en) * 1987-12-28 1989-07-14
US5499156A (en) * 1994-11-18 1996-03-12 Hughes Aircraft Company Forced, resonant degaussing system and method
ES2107969A1 (en) * 1994-11-18 1997-12-01 Hughes Aircraft Co Forced, resonant degaussing system and method
US5995358A (en) * 1996-10-01 1999-11-30 Parc D'activites De La Grande Ile Demagnetizable electropermanent magnetic holder

Also Published As

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JPH0218797B2 (en) 1990-04-26

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