IL41638A - Touch actuated electronic switch - Google Patents
Touch actuated electronic switchInfo
- Publication number
- IL41638A IL41638A IL41638A IL4163873A IL41638A IL 41638 A IL41638 A IL 41638A IL 41638 A IL41638 A IL 41638A IL 4163873 A IL4163873 A IL 4163873A IL 41638 A IL41638 A IL 41638A
- Authority
- IL
- Israel
- Prior art keywords
- switching circuit
- amplifier
- circuit
- earth ground
- output
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
Abstract
1383132 Electronic touch switches MAGIC DOT Inc 23 Feb 1973 [17 March 1972] 9065/73 Heading G1N In a capacitor plate electronic touch switch, the switching circuit is substantially isolated from earth ground so that the entire switching circuit and plate oscillates at power frequency with respect to ground. This oscillating voltage across the body capacity provides an input signal when the plate is touched. As shown, Fig.1, a two-stage switching amplifier 12, 30 is inter-connected by an integrator circuit 48, 50 and energized through a transformer and rectifier 62, 78. The circuit earths 26 are isolated from earth ground 70 and the transformer connections "poled" so that the touch-plate will be 180 degrees out-of-phase with any voltage induced in the touching body. Alternatively a power frequency signal may be injected into the D.C. supply to the switching circuit through a resistor (150), Fig.5 (not shown) with a mains supply, or (102), Fig.3 (not shown) with a battery supply, or a resistive potential divider may be used instead of a transformer, Fig.4 (not shown) with the lower arm (124) acting as an "isolating" resistor. Detailed Additions, Fig.5 (not shown). A large resistor (1 megohm, 152) connected to earth ground is stated to improve noise immunity, and an H.F. by-pass capacitor (158) is recommended in the amplifier circuit. A Zener diode (not shown) connected across the integrator capacitor 50 allows the circuit to be used on various supply voltages.
[GB1383132A]
Claims (9)
1. A switching circuit actuated by the touch of a human, comprising in combination: means for supplying power to the switching circuit including a first output for providing a reference isolated from earth ground and including a second output isolated from earth ground for providing a source of voltage; power frequency amplification means having input means for receiving a signal to be amplified and having output means for providing a switched output, with the switched output having a first state for approximating an electrical short circuit and a second state for approximating an electrical open circuit, the amplification means being isolated from earth ground; first means for providing an electrical connection between the power supply means and the amplification means; means for coupling the switching circuit to a source of alternating frequency power for causing the entire switch^ ing circuit to oscillate with respect to earth ground at the rate of the alternating frequency; a touch plate isolated from earth ground; and means for providing an electrical connection between the input means of the amplification means and the touch plate to allow the capacitance of the human to provide an earth reference to the amplification means and cause the output of the amplification means to change between the first and second states. App*n. No. 41638/2
2. The switching circuit of claim 1, wherein the first amplifier has a gain substantially between 10 and 10 to the third power; and including: a second amplifier including input means and output means and a reference, the second amplifier being isolated from earth ground, being capable of amplifying power frequencies, and having a gain substantially between 10 to the seventh power and 10 to the second power; storage means of a size capable of being easily fabricated by mass production techniques in small size; means for connecting the storage means between the output means of the first amplifier means and circuit reference; and means for providing an electrical connection between the output means of the first amplifier and the input means of the second amplifier.
3. The switching circuit of claim 1 or claim 2, wherein the means for coupling the switching circuit to a source of alternating frequency power comprises resistance means connected between a source of alternating frequency power and the switching circuit for causing the entire switching circuit to oscillate with respect to earth ground at the rate of the alternating frequency and at an amplitude to provide more reliable actuation of the switching circuit. A?p¾a. SJo* 41633/2
4. The switching circuit of any of the preceding claims including: means having a value of impedance substantially one megohm or greater; and means for connecting the impedance means between the circuit reference and earth ground to increase the noise suppression capability of the switching circuit.
5. The switching circuit of any of claims 1, 2, or 4, wherein the means for coupling the switching circuit to a source of alternating frequency power comprises the means for providing an electrical connection between the power supply means and the amplification means.
6. The switching circuit of claim 5, wherein the means for coupling the switching circuit to a source of alternating frequency power causes the amplification means and the entire switching circuit to oscillate with respect to earth ground at the rate of the alternating frequency power and in the opposite phase to that of the source of alternating frequency power to provide a more reliable actuation of the switching circuit. wo. 41638/2
7. A touch, actuated electronic switch, comprising, in combination: a surface accessible to an operator in a manner to allow electronic signal coupling between the surface and the operator; amplifier means isolated from earth ground including input means, output means, and means for accepting an alternating signal; means for providing an electrical connection between the surface and the input means of the isolated amplifier means; integrator means; and means for providing an electrical connection between the output means of the amplifier means and the integrator means.
8. The touch actuated electronic switch of claim 7, including a second amplifier means having input means and output means; and means for providing an electrical connection between the integrator means and the input means of the second amplifier means.
9. The touch actuated electronic switch of claim 7, wherein the means for accepting an alternating signal comprises power input terminals of the amplifier means. Tel-Aviv, March 11, 1973
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23567172A | 1972-03-17 | 1972-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL41638A0 IL41638A0 (en) | 1973-04-30 |
| IL41638A true IL41638A (en) | 1976-05-31 |
Family
ID=22886467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL41638A IL41638A (en) | 1972-03-17 | 1973-02-27 | Touch actuated electronic switch |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5534529B2 (en) |
| AU (1) | AU473212B2 (en) |
| CA (1) | CA1010132A (en) |
| DE (1) | DE2313138A1 (en) |
| FR (1) | FR2176833B1 (en) |
| GB (1) | GB1383132A (en) |
| IL (1) | IL41638A (en) |
| IT (1) | IT979729B (en) |
| ZA (1) | ZA731477B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5317551A (en) * | 1976-07-31 | 1978-02-17 | Showa Electric Wire & Cable Co | Gripping apparatus |
| WO1980001643A1 (en) * | 1979-02-12 | 1980-08-21 | American Hospital Supply Corp | Capacitive switching circuit for energizing remote controlled device |
| JPS6227288Y2 (en) * | 1980-05-23 | 1987-07-13 | ||
| JPS6135285Y2 (en) * | 1980-05-23 | 1986-10-14 | ||
| JPS56165664A (en) * | 1980-05-23 | 1981-12-19 | Hitachi Zosen Corp | Coiled wire accumulating and transfer device |
| JPS6227287Y2 (en) * | 1980-05-24 | 1987-07-13 | ||
| JPS6229748Y2 (en) * | 1981-04-28 | 1987-07-30 | ||
| JPS5897389U (en) * | 1981-12-24 | 1983-07-02 | 南平台工業株式会社 | pipe connection device |
| CN109067386B (en) * | 2018-11-02 | 2023-08-04 | 南京工程学院 | Capacitive touch switch circuit and switch state judging method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3641410A (en) * | 1970-04-30 | 1972-02-08 | Black & Decker Mfg Co | Touch control for electrical apparatus |
-
1973
- 1973-02-22 CA CA164,386A patent/CA1010132A/en not_active Expired
- 1973-02-23 GB GB906573A patent/GB1383132A/en not_active Expired
- 1973-02-27 IL IL41638A patent/IL41638A/en unknown
- 1973-03-02 ZA ZA731477A patent/ZA731477B/en unknown
- 1973-03-06 IT IT48618/73A patent/IT979729B/en active
- 1973-03-14 AU AU53275/73A patent/AU473212B2/en not_active Expired
- 1973-03-16 DE DE2313138A patent/DE2313138A1/en not_active Withdrawn
- 1973-03-16 FR FR7309607A patent/FR2176833B1/fr not_active Expired
- 1973-03-16 JP JP3074973A patent/JPS5534529B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA731477B (en) | 1973-11-28 |
| JPS5534529B2 (en) | 1980-09-08 |
| CA1010132A (en) | 1977-05-10 |
| AU5327573A (en) | 1974-09-19 |
| IL41638A0 (en) | 1973-04-30 |
| DE2313138A1 (en) | 1973-09-20 |
| AU473212B2 (en) | 1976-06-17 |
| JPS496476A (en) | 1974-01-21 |
| IT979729B (en) | 1974-09-30 |
| FR2176833A1 (en) | 1973-11-02 |
| FR2176833B1 (en) | 1976-11-05 |
| GB1383132A (en) | 1975-02-05 |
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