US3660695A - Contactless relay - Google Patents

Contactless relay Download PDF

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Publication number
US3660695A
US3660695A US3660695DA US3660695A US 3660695 A US3660695 A US 3660695A US 3660695D A US3660695D A US 3660695DA US 3660695 A US3660695 A US 3660695A
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United States
Prior art keywords
magnetic field
disposed
control circuit
electromagnetic control
contact
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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
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English (en)
Inventor
Karl Schmitt
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.)
GEHAP GES HANDEL AND PATENTVER
Gehap Gesellschaft Handel And Patentverwertung & Co Kg GmbH
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GEHAP GES HANDEL AND PATENTVER
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Filing date
Publication date
Priority claimed from DE19691950687 external-priority patent/DE1950687A1/de
Priority claimed from DE19691952818 external-priority patent/DE1952818A1/de
Priority claimed from DE19702028187 external-priority patent/DE2028187A1/de
Application filed by GEHAP GES HANDEL AND PATENTVER filed Critical GEHAP GES HANDEL AND PATENTVER
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Publication of US3660695A publication Critical patent/US3660695A/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/90—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices

Definitions

  • a contact free relay having an electromagnetic control circuit and one or more electronic switching circuits disposed in the magnetic field. of the electromagnetic control circuit, wherein the contact free elements are controlled by the magnetic field.
  • the contact free elements are magnetic responsive resistors .connected to one or more controllable semiconductors and mounted within the exciting coil field between one or more ferromagnetic yoke plates.
  • SHEET u 0F 5 lm'e/llor KARL SCHP I'L'T LL WQ- Q Attorney PATENTEDMAY 2 I912 SHEET 5 BF 5 CONTACTLESS RELAY by the magnetic field, consists substantially of a magnet field dependent resistor, which is connectedwith a power supply through a pre-resistor.
  • the contact free relay operates at a much higher switching frequency, since no mechanical parts have to be moved.
  • the control circuit is separated galvanically like in commonly known relays.
  • the required voltage source for the switching circuit is not disadvantageous, since a special voltage is still required when using a conventional relay, in order to create the magnetic field.
  • the present invention provides an improvement over the above-described relays since a higher sensitivity. of the total exciting circuit, and a higher switching frequencyare obtained. Furthermore, the switching arrangement is simplified by using a magnetic sensitive transistor,asocalledMagnistor.
  • the contact free elements are controlled by the magnetic field.
  • the contact free elements in thisinvention are, for example, magnet field dependent resistors. These elements are-one or a plurality of magnet field dependent resistors within the exciting field coil with one or a plurality of soft magnetic bodies, such as, for example, yoke plates. Y I
  • the magnet field dependent resistors By providing the magnet field dependent resistors with a plurality of relatively thin, longitudinally extending yoke plates within the exciting field coil, various advantages are obtained. First of all, the construction of such an arrangement is simple and inexpensive. Furthermore, a'greater sensitivity for the total exciting field circuit is obtained, as well as a higher switching frequency, because of the relatively small iron mass of the yoke plates. Moreover, the magnetic field dependent resistors have low body heat, and therefore, are independent from temperature variations. Finally, it should be noted that substantially less space is needed for the exciting and control unit of the relay, in contrast to relay coils with massive cores and closed U-shaped yokes.
  • FIG. 1 is a cross-sectional view of the arrangement of the magnetic field dependent resistors within theexciting coil of the contact free relay; 1
  • FIG. la shows the arrangement of the magnetic field dependent resistors within the exciting coil of FIG. 1;
  • FIGS. 2 and 3 show furtherarrangements of magnetic field dependent resistors with the associated ferromagnetic yoke plates in cross section;
  • FIG. 4 is a plan view of the arrangement of FIG. 3;
  • FIG. 5 shows a further embodiment of the invention
  • FIGS. 6 and 7 show in cross-sectional plan view, one embodiment, wherein the semiconductor of the magnetic field dependent resistor is on both'sides of the yoke plate;
  • FIGS; 8 and 9 show. further embodiments of the'embodiments of FIGS. 6 and 7; v
  • FIG. 10 shows a preferred switch arrangement for a contact free relay according to the invention
  • FIG. 11 shows the switching a'rrangementof a magnetic sensitive field transistor
  • FIG. 12 shows one switch arrangement for a contact free relay according to the invention
  • FIG. 13 shows a further embodiment of a-switching arrangement according to the invention.
  • FIG. 14 shows a magnetic switch with a permanentmagnet
  • FIGS. 15, 16 and 17 show different arrangements for electromagnetic switches
  • FIG. 18 is a cross-sectional view through a relay coil with an associated magnetic field dependent resistor within the housing' of the relay coil; i
  • an exciting field coil 1 of a contact free relay is shown incross-sectional view.
  • the exciting field coil carries two current junctions.
  • Two resistors 4 and 5, which are dependent from a magnetic field, are provided in. the inner airspace of exciting field coil 1, which is formed in this embodiment by a plastic body3.
  • the magnetic field dependent resistors 4' and 5 carry connections 6 and 7 which are connected withthe corresponding switch elements of the subsequent switch circuit.
  • Magnetic field dependent resistors 4 and 5 are positioned between the end ranges of two overlapping ferromagnetic yoke plates 8 and 9, andare separated from each other by an intermediate isolator 10.
  • the ferromagnetic yokeplates 8 and 9 run from the center, in opposite directions, to approximately the end of the coil.
  • FIG. la the arrangement of the magnetic field dependent resistors 4 and 5 are shown in an enlarged detailed drawing.
  • the magnet field dependent resistors 4 and 5 consist of each two s'emiconduct'orlayers 4 and 5' and two metal layers 4 and 5.
  • FIG. 2 one arrangement of the magnetic field dependent resistors is shown, wherein two further magnetic field dependent resistors 11 and 12 are located atthe outermost face of the ferromagnetic yoke plate 9 Resistors 11 and 12 are covered by a further ferromagnetic yoke plate 13 which runs in the same direction as ferromagnetic yoke plate 8.
  • FIG. 3 one arrangement is shown in which a plurality of magnetic field dependent resistors 4, 5, l1, and 12 are mounted between ferromagnetic yoke plates 8, 13, 15, and 9., 14, respectively, which run alternating opposing directions.
  • FIG. 4 is a plan view of the arrangement shown in FIG. 3.
  • FIG. 5 another embodiment is shown, wherein two magnetic field dependent resistors 4'and 4a are arranged side by side between widened yoke plates 9, l4, and 8, 13, 15, respectively.
  • the magnetic field dependent resistors can then be arranged in a superimposed manner as shown in FIG. 3.
  • a yoke plate 16 which has a recess in one end range, whereby the semiconductors of the magnetic field dependent resistors 17 and 18 are arranged at both sides of the yoke plate.
  • the magnetic conducting sensitive faces of the construction elements are mounted directly. This view is a simplification of the arrangement.
  • FIG. 9 shows, in plan view, an alternate embodiment of FIG. 8, whereby the magnetic field dependent resistors are mounted side by side on a widened yoke plate.
  • FIG. 10 a switch arrangement for a contact free relay is shown in accordance with the invention.
  • the magnetic field dependent resistor 4 is located within exciting field coil 1, shown together with its connections 2. For purposes of clarification, the resistor has been drawn next to field coil 1.
  • a condenser Cl is connected parallel with respect to the magnetic field dependent resistor 4, in order to attenuate unwanted oscilations, which would be noticeable in the form of distortions in the switch-on and switch-off regions, when high frequencies are involved.
  • a series of integrated switch circuits 1C are connected in series and parallel at the junction with the magnetic field dependent resistor 4 and with the control resistor R which in turn is connected to the power source.
  • the low tension side of the integrated switch circuits 1C are connected with the bases of switching transistors T1, T2, T3 and T4 via resistors R1, R2, R3 and R4.
  • Resistors Rl-R4 are regulated in such a manner that if a short occurs, transistors T1 to T4 are not overdriven, that is, their maximum current limits are not exceeded. Switch transistors T1-T4 are thus protected in the circuit.
  • the Zener diode ZD which ispositioned in the voltage feedline for the integrated switch circuits 1C, serves to limit the voltage. Depending in which position the switch circuit is in, that is, which value the magnetic field dependent resistor 4 shows, transistors T1-T4 are opened or closed.
  • a transistor may be used which is magnetic sensitive, instead of the aforedescribed magnetic field dependent resistor.
  • Such a transistor is known under the name of Magnistor.
  • the magnetic sensitive transistor T consists of a base B, an emitter E as well as two collectors K1 and K2. These collectors are arranged symmetrically with respect to the emitter and the base. In the rest position, the collectors, the emitter and the base draw the same current without the magnetic field. An even flow of current flows in load resistors RL] and RL2, while no potential difference appears at the collectors. However, if a magnetic field is exerted on the magnetic sensitive transistor T,,, the current flows are deflected in the transistor, similar to a halltype generator or in a field plate, that is, as in a magnetic field dependent resistor. Thus, one of the collector currents, increases while the other decreases.
  • FIG. 12 shows a switching arrangement wherein the magnet sensitive transistor T, is positioned in the range of the magnet coil R; of a relay coil. Thereby, the magnet sensitive transistor T, may be mounted within the coil symmetrically between two yoke plates or outside of the coil, for instance, in the air space of a closed magnet yoke.
  • the control voltage U is at the entrance terminal of the relay coil R
  • the base of the magnetic sensitive transistor T is in the center of a voltage distributor R and R which is connected to the power current and can be adjustable, if so desired.
  • the two collectors of the magnet sensitive transistor are connected to the power supply by two outside resistors R 1 and R
  • the emitter of transistor T is connected at the other end of the power supply.
  • One of the collectors is connected to the base of a switch transistor T, via a resistor R
  • the collector of this switch transistor is connected to load resistor R, The other terminal of resistor R connects to the power supply.
  • FIG. 13 A further switching arrangement is shown in FIG. 13, wherein the second collector is also connected with a further switching transistor T 2 by means of aresistor R
  • the function of this switching arrangement is basically similar to the one described with respect to FIG. 2, with the exception that with magnetic sensitive transistor T,,,, two switching circuits can be modulated.
  • the switching arrangement can be set up such that there are possibilities for changing over the switching.
  • a magnetic sensitive transistor T is shown in FIG. 14, wherein a permanent magnet M can be moved towards or away from the transistor T,, in the direction of both sets of double arrows. Due to the mechanical movement of the permanent magnet, the magnetic sensitive transistor serves as a control element for a further switching circuit, whereby the whole switching arrangement operates as a magnetic switch.
  • FIG. 16 one embodiment is shown, wherein a ferromagnetic core I, is provided within -a cylindrically-shaped electromagnetic coil 8 At both sides of the coil, two magnetic sensitive transistors T, are provided, which trigger the abovedescribed function and operation of the switching arrange.
  • two. magnetic sensitive transistors T, are mounted in the air gap space of a three-part separated yoke J 2 which is surrounded by a further coil S
  • the magnetic sensitive transistor is disposed in the range of the magnetic field of an electromagnet or permanent magnet which triggers the switching operation.
  • the sensitivity of the relays can be increased when the magnetic field dependent resistor is mounted within the coil and in the air gap of a yoke which is made of a highly permeable material so that the angle between the coil axis and a plane of the magnetic field dependent resistor is between 40-90.
  • a coil 21 is shown .on which winding 22 is mounted.
  • Core 23 is provided with an oblique air space 24, the deflection angle of which is 40 or more with respect to the axis of the coil axis In the extreme case, this space 24' shown in dotted line, can have an angle of 90.
  • Magnetic field depending resistor 25 is mounted in the air space of core 23 and feed lines 26 are connected to the switching circuit, as described above.
  • netic yoke plates disposed substantially in the center of the magnetic field, and coupled to the switching circuit
  • Atleast two magnetic field dependent resistors having an intermediate isolation layer, disposed between said pair of overlapping yoke plates.
  • a contact free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • first ferromagnetic yoke plate extending longitudinally in one direction, and disposed within the magnetic field; second and third yoke plates, overlapping said first yoke plate on each side, extending in an opposite direction,
  • a contact-free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • a second pair offerromagnetic yoke plates alternately interdisposed with respect to said first pair of ferromagnetic plates, and extending in an opposite direction, disposed in the magnetic field;
  • a contact-free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • a plurality of ferromagnetic yoke plates disposed between said overlapping resistors, overlapping each other, and extending from the center of the magnetic field in alternating, opposite directions.
  • a contact-free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • a magnetic field dependent resistor disposed within the magnetic field
  • ferromagnetic means disposed within the magnetic field, on
  • variable resistor coupled to the output of said power supply and to said magnetic field dependent resistor
  • a plurality of switching transistors coupled to the output of said limit' resistors.
  • a contact-free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • At least one magnetic sensitive transistor having two collector terminals, controlled by the magnetic field of the electromagnetic control circuit
  • an adjustable voltage divider coupled to the base of said magnetic sensitive transistor
  • a first resistor coupled to 'each of said magnetic transistor collectors, for coupling power to said magnetic transistor
  • At least one switching transistor having its base coupled in v series to said second resistor; and v a load resistor, coupled to the output of said switching transistor, so that when power is applied to the control circuit, said load resistor is energized in response to the presence of the magnetic field.
  • a contact-free relay having an electromagnetic control circuit and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contact-free elements controlled by the magnetic field and connected with at least one controllable semiconductor, the improvement comprising:
  • At least one switching transistor coupled in series with each collector of said magnetic transistor
  • a load resistor connected to the output of said switching transistor so that said load resistor is energized in response to the presence of the magnetic field.
  • the contact free relay as recited in claim 8 comprising a permanent magnet, and means for positioning said permanent magnet with respect to said magnetic transistor.
  • the contact free relay as recited in claim 8 comprising at least one ferromagnetic yoke having an air gap for receiving said magnetic transistor, and a coil coupled to said yoke for magnetically energizing said yoke.
  • a contact free relay having an electromagnetic control circuit, including an electromagnetic coil and at least one electronic switching circuit disposed within the magnetic field of the electromagnetic control circuit, and including contactfree elements controlled by the magnetic field and connected with at least one controllable semiconductor
  • the improve-' ment comprising: t a ferromagnetic core comprising ferrite material, disposed within the magnetic field of the coil of the electromagnetic control circuit, and having an air gap provided in said core so that said core is divided into two separate ferromagnetic parts,.said air gap being disposed in said core at an angle of between 40 and with respect to the axis of the electromagnetic coil; and
  • At least one magnetic field dependent resistor disposed within said air gap at an angle parallel to the angle at which said gap is disposed with respect to the axis of the coil.

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  • Relay Circuits (AREA)
  • Electronic Switches (AREA)
US3660695D 1969-10-08 1970-10-05 Contactless relay Expired - Lifetime US3660695A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19691950687 DE1950687A1 (de) 1969-10-08 1969-10-08 Kontaktloses Relais
DE19691952818 DE1952818A1 (de) 1969-10-21 1969-10-21 Kontaktloses Relais
DE19702028187 DE2028187A1 (de) 1970-06-09 1970-06-09 Kontaktloses Relais

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US3660695A true US3660695A (en) 1972-05-02

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US3660695D Expired - Lifetime US3660695A (en) 1969-10-08 1970-10-05 Contactless relay

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US (1) US3660695A (en, 2012)
AU (1) AU2089570A (en, 2012)
CH (1) CH516895A (en, 2012)
FR (1) FR2071764A6 (en, 2012)
GB (1) GB1327443A (en, 2012)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857081A (en) * 1973-06-25 1974-12-24 Chandler Evans Inc Proportional solenoid actuator
US4188547A (en) * 1976-06-21 1980-02-12 Westinghouse Electric Corp. Multi-mode control logic circuit for solid state relays
US4456943A (en) * 1982-05-24 1984-06-26 Ga Technologies Inc. Current sensing relay
US4994731A (en) * 1989-11-27 1991-02-19 Navistar International Transportation Corp. Two wire and multiple output Hall-effect sensor
US20030059073A1 (en) * 2000-09-11 2003-03-27 Micro Ear Technology, Inc., D/B/A Micro-Tech Integrated automatic telephone switch
US20040052391A1 (en) * 2002-09-12 2004-03-18 Micro Ear Technology, Inc. System and method for selectively coupling hearing aids to electromagnetic signals
US20040052392A1 (en) * 2002-09-16 2004-03-18 Sacha Mike K. Switching structures for hearing aid
US6760457B1 (en) * 2000-09-11 2004-07-06 Micro Ear Technology, Inc. Automatic telephone switch for hearing aid
US20040252855A1 (en) * 2003-06-16 2004-12-16 Remir Vasserman Hearing aid
US20080159548A1 (en) * 2007-01-03 2008-07-03 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US20090193899A1 (en) * 2008-02-25 2009-08-06 Battelle Memorial Institute System and process for ultrasonic characterization of deformed structures
US8284970B2 (en) 2002-09-16 2012-10-09 Starkey Laboratories Inc. Switching structures for hearing aid
US9036823B2 (en) 2006-07-10 2015-05-19 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9774961B2 (en) 2005-06-05 2017-09-26 Starkey Laboratories, Inc. Hearing assistance device ear-to-ear communication using an intermediate device
US10003379B2 (en) 2014-05-06 2018-06-19 Starkey Laboratories, Inc. Wireless communication with probing bandwidth
US10212682B2 (en) 2009-12-21 2019-02-19 Starkey Laboratories, Inc. Low power intermittent messaging for hearing assistance devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449252A1 (fr) * 1979-02-19 1980-09-12 Panol Sa Dispositif d'aeration d'une gaine de vide-ordures

Citations (5)

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US3016507A (en) * 1959-09-14 1962-01-09 Ibm Thin film magneto resistance device
US3315204A (en) * 1967-04-18 Galvanomagnetic semiconductor device
US3366909A (en) * 1965-05-31 1968-01-30 Siemens Ag Contact-free electrical signal device
US3553498A (en) * 1968-02-12 1971-01-05 Sony Corp Magnetoresistance element
US3569895A (en) * 1966-08-15 1971-03-09 Int Trade & Industry Japan Inhomogeneous magnetoresistance devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315204A (en) * 1967-04-18 Galvanomagnetic semiconductor device
US3016507A (en) * 1959-09-14 1962-01-09 Ibm Thin film magneto resistance device
US3366909A (en) * 1965-05-31 1968-01-30 Siemens Ag Contact-free electrical signal device
US3569895A (en) * 1966-08-15 1971-03-09 Int Trade & Industry Japan Inhomogeneous magnetoresistance devices
US3553498A (en) * 1968-02-12 1971-01-05 Sony Corp Magnetoresistance element

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857081A (en) * 1973-06-25 1974-12-24 Chandler Evans Inc Proportional solenoid actuator
US4188547A (en) * 1976-06-21 1980-02-12 Westinghouse Electric Corp. Multi-mode control logic circuit for solid state relays
US4456943A (en) * 1982-05-24 1984-06-26 Ga Technologies Inc. Current sensing relay
US4994731A (en) * 1989-11-27 1991-02-19 Navistar International Transportation Corp. Two wire and multiple output Hall-effect sensor
US20030059073A1 (en) * 2000-09-11 2003-03-27 Micro Ear Technology, Inc., D/B/A Micro-Tech Integrated automatic telephone switch
US8923539B2 (en) 2000-09-11 2014-12-30 Starkey Laboratories, Inc. Integrated automatic telephone switch
US6760457B1 (en) * 2000-09-11 2004-07-06 Micro Ear Technology, Inc. Automatic telephone switch for hearing aid
US8259973B2 (en) 2000-09-11 2012-09-04 Micro Ear Technology, Inc. Integrated automatic telephone switch
US7248713B2 (en) * 2000-09-11 2007-07-24 Micro Bar Technology, Inc. Integrated automatic telephone switch
US7447325B2 (en) 2002-09-12 2008-11-04 Micro Ear Technology, Inc. System and method for selectively coupling hearing aids to electromagnetic signals
US20040052391A1 (en) * 2002-09-12 2004-03-18 Micro Ear Technology, Inc. System and method for selectively coupling hearing aids to electromagnetic signals
US8433088B2 (en) 2002-09-16 2013-04-30 Starkey Laboratories, Inc. Switching structures for hearing aid
US20040052392A1 (en) * 2002-09-16 2004-03-18 Sacha Mike K. Switching structures for hearing aid
US7369671B2 (en) 2002-09-16 2008-05-06 Starkey, Laboratories, Inc. Switching structures for hearing aid
US20080199030A1 (en) * 2002-09-16 2008-08-21 Starkey Laboratories, Inc. Switching structures for hearing aid
US20080013769A1 (en) * 2002-09-16 2008-01-17 Starkey Laboratories, Inc. Switching structures for hearing assistance device
US9215534B2 (en) 2002-09-16 2015-12-15 Starkey Laboratories, Inc. Switching stuctures for hearing aid
US8971559B2 (en) 2002-09-16 2015-03-03 Starkey Laboratories, Inc. Switching structures for hearing aid
US8284970B2 (en) 2002-09-16 2012-10-09 Starkey Laboratories Inc. Switching structures for hearing aid
US8218804B2 (en) 2002-09-16 2012-07-10 Starkey Laboratories, Inc. Switching structures for hearing assistance device
US20070121975A1 (en) * 2002-09-16 2007-05-31 Starkey Laboratories. Inc. Switching structures for hearing assistance device
US20040252855A1 (en) * 2003-06-16 2004-12-16 Remir Vasserman Hearing aid
US9774961B2 (en) 2005-06-05 2017-09-26 Starkey Laboratories, Inc. Hearing assistance device ear-to-ear communication using an intermediate device
US10469960B2 (en) 2006-07-10 2019-11-05 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US10051385B2 (en) 2006-07-10 2018-08-14 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US10728678B2 (en) 2006-07-10 2020-07-28 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9036823B2 (en) 2006-07-10 2015-05-19 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US11064302B2 (en) 2006-07-10 2021-07-13 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US11678128B2 (en) 2006-07-10 2023-06-13 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9510111B2 (en) 2006-07-10 2016-11-29 Starkey Laboratories, Inc. Method and apparatus for a binaural hearing assistance system using monaural audio signals
US9282416B2 (en) 2007-01-03 2016-03-08 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US11218815B2 (en) 2007-01-03 2022-01-04 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US12212930B2 (en) 2007-01-03 2025-01-28 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US8515114B2 (en) 2007-01-03 2013-08-20 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US11765526B2 (en) 2007-01-03 2023-09-19 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US20080159548A1 (en) * 2007-01-03 2008-07-03 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US10511918B2 (en) 2007-01-03 2019-12-17 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US8041066B2 (en) 2007-01-03 2011-10-18 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US9854369B2 (en) 2007-01-03 2017-12-26 Starkey Laboratories, Inc. Wireless system for hearing communication devices providing wireless stereo reception modes
US20090193899A1 (en) * 2008-02-25 2009-08-06 Battelle Memorial Institute System and process for ultrasonic characterization of deformed structures
US8061207B2 (en) * 2008-02-25 2011-11-22 Battelle Memorial Institute System and process for ultrasonic characterization of deformed structures
US11019589B2 (en) 2009-12-21 2021-05-25 Starkey Laboratories, Inc. Low power intermittent messaging for hearing assistance devices
US10212682B2 (en) 2009-12-21 2019-02-19 Starkey Laboratories, Inc. Low power intermittent messaging for hearing assistance devices
US10003379B2 (en) 2014-05-06 2018-06-19 Starkey Laboratories, Inc. Wireless communication with probing bandwidth

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Publication number Publication date
CH516895A (de) 1971-12-15
FR2071764A6 (en, 2012) 1971-09-17
GB1327443A (en) 1973-08-22
AU2089570A (en) 1972-04-13

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