Abstract:
Dargestellt und beschrieben ist ein elektrisches Gerät, mit einem Gehäuse (2), mit mindestens zwei Leiterabschnitten (3a, 3b, 4a, 4b) und mit einem innerhalb des Gehäuses (2) angeordneten Verbindungsbauteil (5), wobei jeweils ein erstes Ende (6a, 6b) der Leiterabschnitte (3a, 3b, 4a, 4b) als Anschlusselement aus dem Gehäuse (2) herausragt. Das elektrische Gerät (1) kann bei einfachem Aufbau dadurch zuverlässig auf die Überlastung und Alterung von elektronischen Bauelementen in elektrischen oder elektronischen Geräten reagieren, dass innerhalb des Gehäuses (2) ein wärmeausdehnbares Material (8) derart angeordnet ist, dass das Verbindungsbauteil (5) durch das wärmeausdehnbare Material (8) aus einer ersten Position in eine zweite Position verbringbar ist, wenn sich das wärmeausdehnbare Material (8) aufgrund einer Erwärmung oberhalb einer bestimmten Aktivierungstemperatur ausdehnt, wobei entweder in der ersten Position oder in der zweiten Position des Verbindungsbauteils (5) die zweiten Enden (9a, 9b) zweier Leiterabschnitte (3a, 3b, 4a, 4b) mit dem Verbindungsbauteil (5) in elektrischem Kontakt stehen, so dass die beiden Leiterabschnitte (3a, 3b, 4a, 4b) über das Verbindungsbauteil (5) elektrisch miteinander verbunden sind.
Abstract:
A microgripper (2) comprises a pair of opposed actuator devices (4, 6) connected to an electronic control unit (8) . Each actuator (4, 6) includes an actuator body 10 of transparent flexible epoxy based photoresist material forming a "hot" arm (12) and a "cold" arm (14) joined together at their ends, and an electrical heating element wire (18) is embedded in the "hot" arm (12) . A gripper arm (32) extends from the substrate and has a gripping portion (34) such that the gripper portions of the two gripper arms (32) face each other. When electrical current is supplied to the heating element (18) , electrical heating of the "hot" arm (12) occurs, as a result of which thermal expansion of the "hot" arm (12) causes its length to become greater than that of the "cold" arm (14) . Because the "hot" and "cold" arms (12, 14) are joined together at their ends, the increased length of the "hot" arm (12) as a result of its thermal expansion causes the actuator bodies (10) to flex, as a result of which the gripper portions (34) of the gripper arms (32) move closer together.
Abstract:
A method, apparatus, and system for protection from hazards of conductivity is disclosed using non-electrical means to disrupt electrical current with a thermovolumetric substance. The purpose of this invention is to prevent hazardous conditions from occurring by disrupting the flow of electrical current prior to the development of arc fault conditions.
Abstract:
본 발명은 높은 서지 전압에 안정적으로 동작되도록 하면서도 히팅 전극과 온도 퓨즈 및 바리스터가 복합적으로 설계되어, 퓨즈 동작시 발생되는 열에 따라서도 전류를 차단시킬 수 있도록 한 온도 퓨즈 기능을 가진 SMD(surface mount device)형 마이크로 퓨즈 및 그 제조방법에 관한 것으로, 적어도 하나의 제 1 및 제 2 전극이 각각 형성된 퓨즈 기판; 상기 퓨즈 기판의 전면에 형성된 바리스터층; 상기 바리스터층의 일측 및 타측 전면 일부에 각각 배치되되 상기 적어도 하나의 제 1 및 제 2 전극과 각각 접속된 제 1 및 제 2 접속 단자; 상기 제 1 및 제 2 접속 단자와는 비접촉 상태로 상기 바리스터층의 전면에 배치되면서도 상기 퓨즈 기판과 접속된 적어도 하나의 온도 퓨즈; 및 상기 적어도 하나의 온도 퓨즈와는 비접촉 상태로 상기 제 1 및 제 2 접속 단자에 와이어 본딩된 가용체를 구비한 것을 특징으로 한다.
Abstract:
Die Erfindung betrifft eine Einrichtung zur Erfassung einer unzulässigen Über- oder Unterschreitung einer einem temperatursensiblen Gegenstand zugeordneten Maximal- oder Minimaltemperatur, wobei die am Gegenstand (2) anzubringende Einrichtung (1) ein elektronisch auslesbares Speicherelement, insbesondere einen RFID-Chip (4), mit wenigstens einer Speicherzelle (9) sowie einen der Speicherzelle (9) zugeordneten temperatursensitiven Sensor (10), der bei einer unzulässigen Über- oder Unterschreitung einer sensorspezifischen Solltemperatur eine irreversible Zustandsänderung erfährt, umfasst, wobei der auslesbare Speicherzelleninhalt in Abhängigkeit des Sensorzustands variiert.
Abstract:
The invention relates to a voltage surge protection device 1, 21, 31 for protection of a high voltage device. The voltage surge protection device 1, 21, 31 comprises a varistor 2, 22, 32 having a first part 2a, 22a, 32a and a second part 2b, 22b, 32b separated by varistor material 4, 24, 34. The voltage surge protection device 1, 21, 31 further comprises an expandable member 5, 25, 35 arranged to act on a movable electrical contact 7, 27, 37 for short-circuiting the voltage surge protection device 1, 21, 31 upon a threshold voltage being applied between the first part 2a, 22a, 32a and the second part 2b, 22b, 32b of the varistor 2, 22, 32. The invention also relates to high voltage circuit breakers.
Abstract:
An electrical device including a heat sensing circuit interrupter to enable a load to be selectively coupled to or disconnected from a power source in accordance with a level of a sensed temperature includes a relay assembly operable between a closed state when the sensed temperature is below a predetermined limit temperature, thereby enabling the coupling of the load to the power source, and an open state when the sensed temperature is above the predetermined limit temperature, thereby electrically disconnecting the load from the power source. The device further includes a sensor assembly including a light source operatively associated with a light sensor. The light sensor is configured to be sensitive to specific levels of the sensed temperature and the light source is configured to emit light along a plurality of optical paths at any one of a plurality of wavelengths sensitive to temperature. The light sensor is further configured to sense temperature at any one of a plurality of operating points on the electrical device and trigger the relay assembly between the closed state and the open state.
Abstract:
An electrical device including a heat sensing circuit interrupter to enable a load to be selectively coupled to or disconnected from a power source in accordance with a level of a sensed temperature includes a relay assembly operable between a closed state when the sensed temperature is below a predetermined limit temperature, thereby enabling the coupling of the load to the power source, and an open state when the sensed temperature is above the predetermined limit temperature, thereby electrically disconnecting the load from the power source. The device further includes a sensor assembly including a light source operatively associated with a light sensor. The light sensor is configured to be sensitive to specific levels of the sensed temperature and the light source is configured to emit light along a plurality of optical paths at any one of a plurality of wavelengths sensitive to temperature. The light sensor is further configured to sense temperature at any one of a plurality of operating points on the electrical device and trigger the relay assembly between the closed state and the open state.
Abstract:
Die Erfindung betrifft eine elektrische Schaltvorrichtung, welche mindestens zwei Kontaktelemente ( 1a, 1b, 1c, 1e, 1f), welche in einer ersten Schaltstellung miteinander in elektrisch leitendem Kontakt stehen und welche in einer zweiten Schaltstellung elektrisch voneinander getrennt sind, und ein Betätigungselement (2) aufweist. Das Betätigungselement (2) weist ein Formgedächtnismaterial auf, welches das Betätigungselement (2) von einer der beiden Schalterstellungen in die jeweils andere bei Erwärmung verbringt.
Abstract:
A terminal assembly for a device configured to indefinitely retain material therein includes a terminal shaft having a terminal head defined on an end thereof and at least one shaft including a handle and a pin member defined at opposed ends thereof. The handle includes a cam surface configured to bias the terminal head upon operation of the handle, thereby causing the pin to bias at least one compression plate within a compression area defined between the handle and the pin. The handle is configured to operate in a first position wherein the at least one compression plate is biased towards the compression area and a second position wherein the at least one compression plate is retracted from the compression area. The assembly further includes a spring component configured to retain the at least one compression plate within the compression area, wherein the material is retained within the compression area.