Abstract:
A switching device having a movable contact that is an integral part of a metallic support substrate and is supported above the support substrate by a plurality of spring-like support legs that are also an integral part of the support substrate. The support legs extend radially outward from the movable contact and contact the substrate and the movable contact at equally spaced points. The movable contact is aligned with either a stationary contact or another movable contact and a stationary contact to provide either single or multiple switching. The switching device can be used for contact switching or capacitive switching. A plurality of the switching devices can be formed on the support substrate making the switching device particularly well suited for use in a keyboard. A portion of each support leg may be thinned to provide a negative force-displacement characteristic which provides a good tactile feedback signal indicating switching.One or more of the switching devices are produced by forming one or more groups of curved, unconnected, radially extending slots in a metallic substrate, deforming the legs defined by the slots past their elastic limit, and then, if desired, precipitation hardening the completed structure. To assure movement of the central area of the movable contact past the plane of the support substrate, a portion of each of the legs is thinned prior to the legs being plastically deformed.
Abstract:
Relates generally to the production of electrical signals from a keyboard, each key of which is individually operatively associated with a switching device whose activation to electrical conductive condition is controlled by the displacement of the key. These switches are hermetically sealed from the atmosphere and are electrically scanned in succession at relatively high speeds and at a repetitious rate such that several scanning cycles occur during the normal activation of a selected key. The keyboard mechanism also includes a shift register having one more bit position than the number of switch devices and into which a bit is introduced into the ''''one'''' position at the instant the scan encounters a closed switch of the keyboard. This bit is then shifted through the register in timed relation to the scan of the remaining key switches and unloaded into the last bit position of the register. A detector senses the presence of a bit in both the ''''one'''' position and the last position of the shift register and upon detection of a bit solely in the one position it delivers a signal indicative of the character represented by the actuated key and upon detecting bits in the two extreme positions of the shift register it nullifies the delivery of such a signal.
Abstract:
Beschrieben wird ein Kontaktelement (7) zur intermittierenden Kontaktierung von Leiterbahnen (2, 3) auf einer Leiterplatte, insbesondere für flexible Schaltmatten (4-6), beispielsweise für flexible Eingabegeräte aus dem Automobilbereich. Eine sehr zuverlässige und insbesondere auch für hohe Ströme respektive hohe Spannungen geeignete Konstruktion wird dadurch erreicht, dass das Kontaktelement aus einem Metallschwamm (8) besteht. Der Metallschwamm ist dabei bevorzugtermassen wenigstens teilweise von einem elastomeren Material, welches gleichzeitig das Baumaterial der Schaltmatte sein kann, durchdrungen. Weiterhin wird ein Verfahren zur Herstellung eines solchen Kontaktelementes respektive von Schaltmatten/Eingabegeräten mit solchen Kontaktpillen sowie die Verwendung von solchen Kontaktpillen (7) beschrieben.
Abstract:
A push−button switch−use member which is provided with a movable contact consisting of a metal element (7) that forms a contact surface with a counter electrode (4), wherein the contact surface is provided with many holes (6) in the height direction, and a flexible−resin filler (8) is filled in the holes (6).
Abstract:
An autoclavable electrical switch assembly for use with a medical device (11) having electrical functions comprising a flexible substrate formed of an insulating material. First and second surfaces (32, 33) have outer margins. A first conductive structure (37), adherent to the first surface, forms a pattern surrounding an area of the surface and a contact (46) is disposed within the area. A second conductive structure (38), adherent to the second surface, forms a ground plate and at least one feedthrough device (48) forms a connection between the contact and the ground plate. A snap dome (67) of a conductive material overlies the contact and engages the pattern surrounding the area. A flexible cover (86) is disposed over the first and second surfaces for forming a hermetic seal between the outer margins so that the dome is hermetically sealed. The cover and the seal are capable of withstanding repeated autoclaving.
Abstract:
Two pairs of diagonally linked squares with rounded edges are used as fixed contacts in the production of keyboards. A direct connection is ensured in the diagonal direction; the squares consist of conductive lacquer (carbon lacquer) and cover copper pads on a printed circuit board.
Abstract:
A method for manufacturing a fluorine-based resin coating powder includes a silver powder preparing step of preparing a silver powder having a predetermined grain size, a silver powder solution mixing step of adding the silver powder to an ethanol solution, followed by mixing, a PH adjustment solution preparing step of preparing a solution having a pH that is adjusted to a set PH, a fluorine silane preparing step of preparing fluorine silane, and a fluorine-based resin coating silver powder manufacturing step of manufacturing a fluorine-based resin coating silver powder coated with the fluorine-based resin at a set thickness by adding the silver powder mixed with the ethanol solution in the silver powder solution mixing step and the fluorine silane prepared in the fluorine silane preparing step to the solution having the pH that is adjusted to the PH set in the PH adjustment solution preparing step, followed by mixing.
Abstract:
The present invention relates to a direct current relay, and more particularly, to a direct current relay capable of reducing an electronic repulsive force generated between a fixed contact and a movable contact by a permanent magnet installed to extinguish an arc. The direct current relay includes: a frame; first and second fixed contacts spaced from each other with a predetermined distance there between; first and second magnetic substances formed to enclose a lower part of the first and second fixed contacts; a movable contact movable to contact or to be separated from the first and second fixed contacts, having a first movable contact contactable to the first fixed contact, and having a second movable contact contactable to the second fixed contact; and a pair of permanent magnets installed on long sides of the frame.
Abstract:
An electrical contact component and a method for the production thereof. The contact component has a sintered contact element and a contact carrier cast onto the contact element. The grains of the contact element are oriented in a preferential direction.