The Ferreed - A New Switching Device

Feiner, A.; Lovell, Christopher; Lowry, Taylor; Ridinger, P. G.

doi:10.1002/j.1538-7305.1960.tb03920.x

Cited by 19 publications

(3 citation statements)

References 3 publications

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“…Numerous efforts have been devoted to the development of advanced magnets that can adjust their strength, thus enabling flexible adhesion. One of the earliest examples of controlling magnetism was by Feiner et al (1960), where a ferrite core, wound with a metallic reed, changed its magnetization when receiving magnetic field pulses from different directions. Their work aims to realize a magnetically controlled mechanical relay.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic micro-module reconfigurations based on inter-modular interactions

Miyashita

Diller

Sitti

2013

The International Journal of Robotics Research

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We present a scheme of two-dimensional module reconfiguration based on interactions between microscale magnetic modules with potential applications in micro-robotics, particularly in automatic micro-fabrication, non-invasive diagnoses, micro-surgery, and drug delivery at unreachable sites. The approach taken is a mixture of a top-down engineering approach and a bottom-up self-assembly approach, where reconfiguration commands are delivered from outside the workspace in the form of a magnetic field, which directs configuration changes in the set of modules by changing the strengths of individual magnetic moments. The magnetic modules in the study, 750 µm in size, are constrained to a liquid surface, providing a simplified two degrees of freedom translational motion environment, where the laterally interacting inter-module magnetic force determines the assembly configuration. In this way, the relative distance of the magnets simply reflects the strength of the interactions, and thus easily enables the design of the system's reconfiguration scenario. Reconfiguration occurs when the magnetic attractive forces are changed. To direct the assembly morphology in a controlled manner, the modules are addressed magnetically by incorporating a different magnetic material into each module type, each with different magnetic hysteresis characteristics. For addressing different modules' magnetizations, we incorporate three different magnetic materials that feature different magnetic coercivities. This allows for the independent control of the magnetization of each material using applied external fields of varying strength, leading to arbitrary configuration change in a three-module set and limited control over a four-module set. General cases with more than five modules are further discussed.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional magnetic micro-module reconfigurations based on inter-modular interactions

Miyashita

Diller

Sitti

2013

The International Journal of Robotics Research

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“…TO achieve the pulse actua tion feature required in these arrays, switchable semihard magnetic plates are associated with the contacts at each point in the matrix. 1 It has been obvious for many years that it might be advantageous to make the reeds themselves out of the semihard magnetic material and eliminate the plates. Such a self-latching or remanent reed contact was first proposed by R. L. Peek in the late 1950s.…”

Section: Introductionmentioning

confidence: 99%

Remreed Switching Networks for No. 1 and No. 1A ESS: Development of a Remanent Reed Sealed Contact

Archer¹,

Olsen²,

Renaut³

1976

Bell System Technical Journal

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“…Für die Anpassung der Betätigungscharakteristiken der Kontakte an die völlig anderen Vorgaben der Steuerwerke werden vielfältige Vorschläge gemacht, die nicht Gegenstand dieser Betrachtung sind, aber an zwei Beispielen kurz gestreift werden sollen. Während derartige Versuche allerdings keine nennenswerte praktische Bedeutung erlangten, bestimmt die Entwicklung der Magnetumpolungs-Relais[4] auf viele Jahre die Gestaltung der Vermittlungen in den USA; sie ist auch gegenwärtig noch wesentliches Element der Ortsvermittlungstechnik in weiten Regionen der Erde. So werden beispielsweise bereits um 1950[3] Vorschläge unterbreitet, die Spulen der Relais, deren Kontakte den Sprechweg bilden, durch Kaltkathoden-Röhren anstelle von vorgeschalteten Relais zu halten und so die relativ kurze Zünddauer dieser Röhren zum Ansteuern der -vergleichsweise langsamen -eigentlichen Sprechkreisrelais zu nutzen.…”

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Zur Geschichte der vollelektronischen Sprechwegedurchschaltung in Vermittlungen

Plank¹

1987

Frequenz

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Übersicht:Es wird ein Überblick über die Entwicklung vollelektronischer Koppeltechniken in der Vermittlungstechnik gegeben. Das Bestreben, vollelektronische Koppler einzusetzen, wird aus den Anpassungsbedingungen zwischen rechnerähnlichen Steuerstrukturen und Koppelnetz abgeleitet. Ausgehend von den Glimmlampenkopplern des "Amtes Morris" wird der Übergang zu Halbleiteranordnungen für Raumvielfach-und Zcitmultiplexkoppler beschrieben. Die Einflüsse der jeweiligen technologischen Varianten auf die Gestaltung der Speise-und Koppelanordnungen werden aufgezeigt.Abstract: The development of fully electronic coupling techniques for centralized controlled switching systems is described. It is shown, that the operating conditions in interworking'between electronic control of a switching system and its coupling network can be optimized by using fully electronic coupling networks. Starting with the introduction of a cold-cathode-coupling network used in the "Morris Exchange" in the early 60'ies, the transition to semiconductor coupling points for space-as well as time-division techniques is demonstrated. The influence of the different technological variations on the design of feeding-and coupling structures is shown.

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The Ferreed - A New Switching Device

Cited by 19 publications

References 3 publications

Two-dimensional magnetic micro-module reconfigurations based on inter-modular interactions

Two-dimensional magnetic micro-module reconfigurations based on inter-modular interactions

Remreed Switching Networks for No. 1 and No. 1A ESS: Development of a Remanent Reed Sealed Contact

Zur Geschichte der vollelektronischen Sprechwegedurchschaltung in Vermittlungen

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