Abstract:
A keyboard device utilizing a conductive plastic material layer which contacts circuit elements or pathways, the improvement of snapable plastic means raised on a pedestal through which it snaps through center to provide a feel of completion of circuit contact to the user.
Abstract:
This invention relates to a telescopic switch for isolated-phase bus duct, comprising: a first male conductor including a first guide-positioner means (4); a 5 second female lead connector coaxially separated from the first connector which includes a second guide-positioning means, wherein said moving contact is coupled coaxially and in a movable manner to the first conductor, and wherein said moving contact moves to an open position, wherein said moving contact is separated from the first conductor and to a closed position where said moving contact causes a contact between the first male connector and that of a second female connector, through interaction with one another from the first guide-positioner means of the first conductor, the second guide-positioner means of the second conductor and the guiding means of the moving contact.
Abstract:
Il s'agit d'un dispositif d'établissement et/ou de coupure de courant comportant une paire de contacts permanents (3, 4), l'un au moins des contacts (3, 4) de la paire étant mobile. Au moins un contact permanent (3, 4) de la paire comporte une partie principale (3.1, 4.1) ayant une extrémité libre et une partie de protection terminale (3.2, 4.2) solidaire de l'extrémité libre de la partie principale (3.1, 4.1), destinée à n'être en contact mécanique et électrique avec l'autre contact permanent (4, 3) de la paire que lors d'une manœuvre d'ouverture ou de fermeture de la paire. Cette partie de protection terminale (3.2, 4.2) est dans un unique métal de transition ayant une température de fusion strictement supérieure à celle de la partie principale (3.1, 4.1) avec laquelle elle est solidaire, ou dans un oxyde ou un carbure d'un tel métal, ou bien en oxyde de zinc. Application notamment aux disjoncteurs haute ou moyenne tension.
Abstract:
A key entry device including a housing, a keypad array disposed within the housing and including a plurality of keys, a key contact array disposed within the housing below the keypad array and including a plurality of contact pairs, a dome array underlying the keypad array and the key contact array and including a plurality of domes, and a protrusion array underlying the dome array and including a plurality of protrusions, whereby depression of one of the plurality of keys of the keypad array causes a corresponding one of the domes of the dome array to be displaced downwardly and to be deformed by pushing engagement with a corresponding one of the protrusions of the protrusion array into contact with at least one of the contact pairs of the key contact array.
Abstract:
Temperaturschutzvorrichtung (1) zur Verwendung in einem elektrischen Stromkreis zum Schutz des elektrischen Stromkreises vor Erhitzung, mit einem ersten Kontaktelement (5) und einem zweiten Kontaktelement (10), die über jeweilige Enden (7, 12) miteinander verbunden sind und die derart ausgebildet sind, dass sich die jeweils miteinander verbundenen Enden (7, 12) des ersten und zweiten Kontaktelements (5, 10) bei Überschreiten einer Grenztemperatur aufgrund einer mechanischen Vorspannung zwischen den beiden Enden (7, 12) voneinander trennen und damit den elektrischen Stromkreis unterbrechen, wobei zumindest die Enden (7, 12) der Kontaktelemente (5, 10) ein Material mit einer höheren Rekristallisationstemperatur als Reinkupfer aufweisen.
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 secure smartcard reader including a smartcard connector and a flexible printed circuit board wrapped around and at least partially surrounding the smartcard connector and at least partially defining a security volume enclosing the smartcard connector, the wrapped flexible printed circuit board defining on an outer-facing surface thereof a plurality of keypad contacts, the wrapped flexible printed circuit board defining electrical conductors connecting the plurality of keypad contacts to connector pads and the wrapped flexible printed circuit board defining a protective anti-tamper mesh protecting the electrical conductors.