GB2253064A - Multifunction circuit tester - Google Patents

Multifunction circuit tester Download PDF

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Publication number
GB2253064A
GB2253064A GB9026454A GB9026454A GB2253064A GB 2253064 A GB2253064 A GB 2253064A GB 9026454 A GB9026454 A GB 9026454A GB 9026454 A GB9026454 A GB 9026454A GB 2253064 A GB2253064 A GB 2253064A
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GB
United Kingdom
Prior art keywords
testpen
signal
multifunction
conductor
tip
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
GB9026454A
Other versions
GB2253064B (en
GB9026454D0 (en
Inventor
Tan Teow Kee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9026454A priority Critical patent/GB2253064B/en
Publication of GB9026454D0 publication Critical patent/GB9026454D0/en
Publication of GB2253064A publication Critical patent/GB2253064A/en
Application granted granted Critical
Publication of GB2253064B publication Critical patent/GB2253064B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16561Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in hand-held circuit testers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

A multifunction circuit tester (1) includes an electronic amplifier circuit and a signal generator (7). The signal generator (7) can be used as a signal injector to detect faults in an amplifier circuit when connected to a tip (15) and a contact plate (11). Continuity between two points in an electrical circuit when tested (11, 15) will be indicated by an LED (8) and buzzer, (17). The amplifier circuit makes it possible to detect a high voltage not exceeding 600 voltage AC on a conductor without having to touch the conductor directly. <IMAGE>

Description

Multifunction festpen This invention relates to testpens.
Testtens are well known voltage indicator which comprise a neon buib with resistor housed in a serewdriver. This voltage indicator is only suitable for testing AC voltage, There is a special type of test pen known as a testing serewdriver in which a wire is attached to the testing serewdriver, which enabies it to detect AC/DC voltage in the electric supply source and determine the polarity + or - at a glance in the DC voltage circuit.
Testpens as we know can only be used to detect AC voltage in the electric supply and some other Testpens can used to detect AC/DC Voltage and polarity.
According to the present invention the Multifunction Testpen combines the handy shape of a Test Pen and has its own source of power like a multitester. however the invention also has a built-in minute electronic amplifier circuit which makes it possible to detect high voltage not exceeding 600 volt AC without having to touch the conductor directly. The testing of silicon semiconductor such as Rectifier and the electrical continuity test between two points is indicated by the light emitting diode (LED) or busser or mini speaker which is more sensitive than the neon buib in a normal testpen. An@ther object of the invention is that it has a built in signal generator which generates a signal in a form of either a tone or a musical tone.
In order that the present invention may be more readily understood the following description is given. Reference will be made to the accompanying drawing in which : Fig 1 is an exploded view of the multifunctifunction testpen.
Fig 2 shows a side view of the multifunction testpon.
Fig 3 shows the schematic diagram of the multifunction testpen Fig 4 is an explodet wiew of the testpen cap.
The multifunction testpen consists of a testpen body 1 made of transparent plastic to show the content of the testpen as shown in Fig 1. The testpen houses a piece of printed circult board (P.C.B) 2, Two button battery cells 3, Two conductor springs ; one being a compressor spring 4 and the other being a battery spring 5. Mounted on the P.C.B 2 is an electronic amplifier circuit. Signal generator transistor or I.C. 7 and a Light Emitting Diode (LED) 8 or mini speaker as an indicator. The power supply or the circuit t is supplied by two button ceiis 3.
The two button cells are connected in series and the negative Supply is connected to the P.C.B 2 by means of a metal link 9.
The positive supply is linked to the battery spring 5 which is linked to the conductor sensor plate 10 and conductor testpen senser 11. When the conductor sensor plate 10 makes contact with the conductor wire plate 12 which is soldered onte the P.C.B. 2, the positive supply will then flow through the P.C.B. 2. The conductor sensor plate 10 and testpen conductor sensor 11 are in contact together onto the testpen cap 13. The testpen cap 13 is made of non-conducting materials. The compressor spring 4 act as a conducting link between the P.C.B 2 and the metal conductor steel 14. This metal conductor steel 14 is designed for use as a testpen tip 15 and also as a serewdriver which is moulded onto the testpen body.
A round piece of plastic 16 mounted on top of the P.C.B 3 by means of a metal link 9 to hold the button cells 3 and P.C.B 2 in position.
Some of the practical function application and description of the multifunction testpen is illustrated on page 4 to 7.
Function 1 : To test an amplifier circuit while doing repair 1. Place finger on testpen sensor and the testpen tip on the input of the amplifier to be tested. Make sure the power supply of the amplifier to be tested is "on". Place another finger on the amplifier metal chassis of the earth.
2. The testpen will produce a signal of either tone or musical tone which is injected into the input of the amplifier.
A musical tone or tone will be heard on the output which are the speakers.
3. A distorted sound or no sound at the ouput shows that part of the amplifier components is faulty.
Function 2 : For testing high voltage at a vehicles ignition system.
l. Touch the ignition cable of the car with testpen sensor or testpen tip as shown in illustration.
2. Turn key to start engine.
3. If the LED on the testpen flickers it indicates the ignition electric system is functioning.
Function 3 : For testing power point.
1. Insert testpen tip of testpen into the AC power supply outlet as shown in illustration.
2. Hold the testpen while finger is not touching the metal part on top of the testpen (testpen sensor 11).
3. If LED lights up, this indicates that AC voltage is present.
Function 4 : For testing switch of good condition.
1. Place finger and testpen tip on the terminal pins of the switch as illustrated.
2. The LED should light up when the switch is turned "ON" and LED should not light up when switch is turn to "OFF".
Function 5 : For testing silicon rectifier of good condition and to determine the anode and cathode of the rectifier.
Function 6 : For testing + or - polarity of DC supply as illustrated.
1. Place,finger on testpen sensor, testpen tip on one of the two terminals and another finger on the other terminal.
2. The LED lights up to show the + polarity.
Function 7 : For testing continuity of wire.
1. Place, finger on testpen sensor, testpen tip on one end of the wire and another finger on the other end of the wire.
2. The LED lights up to indicate continuity.

Claims (1)

  1. CLAIMS :
    1. The Multifunction Testpen comprise a body in a form of testpen 1, wnicn nouses an electronic amplifier circuit, a generator transistor t which produces a signal either in a form of a tone or musical tone through a mini speaker 17 inside the testpen and a light emitting diode 8 mounted on a printed cirouit board 3 which is operated by DC power supply. The testpen senser 11 and the test pen tip 15 acts as two leads.When the conductor sensor 11 and tip 15 are shorted together or in complete ci@@@@@ the LED 6 lights up and the signal generator @@@@@@@tor 7 will produce a signal and the signal is then transmitted via the testpen tip 15, making it possible to bo used as a signal injector.
    The electronic device circuit (Fig 3) contain a series of transistors (integrated circuit) resistors, capacitors Cl, a light emitting diode 3 or a buzzer or a mini speaker 1 17, and a battery button cell as DC power supply 5 is connected as sown in Fig 3, thereby making it possible to test continuity in any electrical circuit.
    j. The Multifunction Test Pen which is moulded in the shape of a testpen which is made of transparent plastics 19 with a chisel shaped tip for use as a serew driver.
    4. The negative supply is connected to the P.C.B. 2 by means of a metal link 9. The positive supply is linked to the battery spring 5 which is linked to the conductor sensor plate 10 and conductor testpen sensor 11. When the conductor sensor plate 10 makes contact with the conductor wire 12 which is soldered onto the P.C.B. 2 the positive supply will then flow through the P.C.B. b When the conductor sensor 11 & tip 15 are shorted together, the L.E.D. light up and the musical tone can be heard on the mini speaker mounted on the P.C.B. which is produced by he signal generator transistor.
    6. The multifunction testpen substantially as described herein with reference to Figure 1 to 4 of the accompanying drawwing.
    7. The multifunction test pen substantially as described herein with reference to Figure i to 4 The mini speaker or suszer is used to produce a sound from the signal generator transistor without the mini speaker or buzzer the multifunction testpen can Still ion as a signal injected.
GB9026454A 1990-12-05 1990-12-05 Multifunction testpen Expired - Fee Related GB2253064B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9026454A GB2253064B (en) 1990-12-05 1990-12-05 Multifunction testpen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9026454A GB2253064B (en) 1990-12-05 1990-12-05 Multifunction testpen

Publications (3)

Publication Number Publication Date
GB9026454D0 GB9026454D0 (en) 1991-01-23
GB2253064A true GB2253064A (en) 1992-08-26
GB2253064B GB2253064B (en) 1995-04-05

Family

ID=10686527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9026454A Expired - Fee Related GB2253064B (en) 1990-12-05 1990-12-05 Multifunction testpen

Country Status (1)

Country Link
GB (1) GB2253064B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103970062A (en) * 2012-11-29 2014-08-06 洛克威尔自动控制技术股份有限公司 Circuit that deciphers between AC and DC input signals
CN104459282A (en) * 2014-12-11 2015-03-25 柳州铁道职业技术学院 Multifunctional circuit testing electroprobe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118068078B (en) * 2024-04-16 2024-07-05 温州正原电子有限公司 Test pencil for detecting voltage in wall

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689832A (en) * 1970-05-01 1972-09-05 Western Technical Products Inc Resistance tester for producing an audible tone that varies with the resistance
US3826977A (en) * 1973-05-24 1974-07-30 C Woodworth Test set for tracing and checking the continuity of electrical circuits
US3919631A (en) * 1973-07-05 1975-11-11 Richard D Brown Leadless probe
US4027236A (en) * 1976-07-14 1977-05-31 Triple S Products Company Voltage and continuity checker
US4791376A (en) * 1987-05-15 1988-12-13 Freedman Milton W Multi-probe, hand-held circuit tester

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689832A (en) * 1970-05-01 1972-09-05 Western Technical Products Inc Resistance tester for producing an audible tone that varies with the resistance
US3826977A (en) * 1973-05-24 1974-07-30 C Woodworth Test set for tracing and checking the continuity of electrical circuits
US3919631A (en) * 1973-07-05 1975-11-11 Richard D Brown Leadless probe
US4027236A (en) * 1976-07-14 1977-05-31 Triple S Products Company Voltage and continuity checker
US4791376A (en) * 1987-05-15 1988-12-13 Freedman Milton W Multi-probe, hand-held circuit tester

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103970062A (en) * 2012-11-29 2014-08-06 洛克威尔自动控制技术股份有限公司 Circuit that deciphers between AC and DC input signals
CN104459282A (en) * 2014-12-11 2015-03-25 柳州铁道职业技术学院 Multifunctional circuit testing electroprobe

Also Published As

Publication number Publication date
GB2253064B (en) 1995-04-05
GB9026454D0 (en) 1991-01-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19981205