The present invention relates to a locking device for an operating mechanism of a gas insulated switchgear, capable of locking or unlocking operations of an operating mechanism of disconnecting switches and earthing switches of the gas insulated switchgear, and the locking device includes a driving shaft lever connected to the operating mechanism to perform a rotation motion, first and second link rods coupled to upper and lower ends of the driving shaft lever, respectively, to transfer the motion, a driven shaft lever having upper and lower ends connected to the first and second link rods, respectively, to perform a rotation motion, and provided with a stopping groove on a part thereof, a supporter installed at a tank, a locking lever coupled to the supporter to perform a rotation motion or a parallel motion, the locking lever locking the motion of the driven shaft lever when being inserted into the stopping groove, and a driven shaft rotated by a force transferred by the driven shaft lever.

Device characterized by including a protective mechanism for the keyboard system which makes attacks impossible by mechanical manipulation, mechanical perforation, part separation, chemical short circuits or the insertion of intrusive devices.

One of the objectives of this invention is to provide a constructive device for a keyboard in order to impede the insertion of unauthorized access devices into their internal circuits, guaranteeing the internal inviolability of installed equipment at the point of sale and providing a significant increase in security of the keyboard system.

The present invention is related to a switchboard comprising a PCB (10), a foil (20), at least one switch contact (11, 21) of the force-sensitive resistor type interposed between the PCB and the foil and a mesh (31) of electrically conductive tracks for protection against tampering interposed between the switch contact and the foil. The conductive mesh adheres to the foil and to the PCB. The invention is also related to a method of manufacturing such a switchboard.

A control assembly (10) comprising a switch pad (12) and a circuit board (14). The switch pad (12) has a connection member (16), a first contact (18) adjacent the connection member (16), and a flexible dome (20) having a second contact (22). The circuit board (14) is engaged with the switch pad (12) and includes an engagement area (24) engaged with the connection member (16), third contacts (26) adjacent the engagement area (24) and fourth contacts (28). The flexible dome (20) of the switch pad (12) is configured to be depressed to engage the second contact (22) with the fourth contacts (28) to electrically connect the fourth contacts (28). The first contact (18) electrically connects the third contacts (26) when the circuit board (14) is engaged with the switch pad (12). The first contact (18) and the third contacts (26) form a first circuit for determining if the switch pad (12) is properly engaged with the circuit board (14) such that the second contact (22) will form a second circuit with the fourth contacts (28) when the flexible dome (20) is depressed.

The object of the present invention is to utilize a reinforcing plate formed out of a hard resin or a metal introduced into a key unit in order to overcome the weak point such that the conventional rubber keypads are too soft and lack shape stability, as a functional design element of equipment including a key unit into which the plate is incorporated. A support frame 4a for surrounding and supporting key groups arrayed on a key-operating surface of a key unit 1 in a manner such as a picture frame is formed by processing the outer edge of a reinforcing plate 4, and the key unit can be installed to mobile equipment directly from the outside of casing through the support frame, for example, by fitting the support frame 4a into an opening provided on the casing of the mobile equipment into which the key unit should be incorporated. As a material for a hard resin reinforcing plate, there are used PC (polycarbonate resin), PET (polyethylene terephthalate resin), PMMA (polymethylmethacrylate/acrylate resin), and a mixture thereof. As a material for a metal reinforcing plate 4, there can be used various metals such as magnesium, aluminum, stainless steel, titanium, copper, gold, etc., and an alloy thereof. For a decoration to the support frame or the exposed part of the reinforcing plate, there are used printing, painting, or various film-forming methods with a metal or a nonmetal.

An electronic circuit assembly including a plurality of printed circuit broads (40,46,48) including electrical circuits (52) and electronic components (42,50) mounted on at least one of the plurality of printed circuit boards in electrical communication with the electrical circuits, wherein at least some of the plurality of printed circuit boards define an anti-tamper enclosure (44) for at least some of the electronic components (42).

A security system for electronic circuits (for example electronic circuits contained within a secure POS terminal (200)) is provided that is both more tamper resistant, and tamper responsive and less expensive than the prior art epoxy potting. This is achieved by inserting an electrical connector (310) between a first (260A) and a second (260B) circuit board contained within a case of the POS terminal (200). The first (260A) and the second (260B) circuit boards are any type of circuit board known in the art. If the case is opened the connector no longer provides an electrical connection between the first (260A) and the second (260B) circuit boards, triggering a tamper detection circuit (460). In some embodiments, a flexible conductive film (340) is wrapped around the circuit boards and the connector (310). If a tamperer attempts to penetrate the case of the POS terminal (200) to disable the tamper detection circuit, the circuit on the flexible security film (340) is interrupted, in turn triggering the tamper detection circuit (460). By eliminating the potting process the cost and complexity of manufacture are reduced. In addition, the circuitry within the terminal (200) can be accessed for repair and maintenance purposes.

Anordnung zum Erkennen von auf einem Bedienelement eines Gerätes nachträglich angebrachten Gegenständen mit einer das Bedienelement umgebenden Lichtsammelplatte aus strahlungsdurchlässigem Material. Die Lichtsammelplatte lenkt auf sie auftreffende Strahlung zu einem Sensor um, der einen unzulässigerweise über dem Bedienelement angebrachten Gegenstand an der durch diesen verursachten Abschwächung der Strahlungsintensität erkennt.