Secured keypad devices
First Claim
Patent Images
1. A data entry device comprising:
- a housing including a top housing portion including key apertures;
a key assembly including a plurality of depressible keys, which partially extend through said key apertures and key contacts which do not underlie said key apertures;
a protective partial enclosure at least partially surrounding said key assembly, said protective partial enclosure including at least one anti-tampering grid formed of a multiplicity of interconnected anti-tampering electrical conductors and being formed with apertures aligned with said key apertures for permitting displacement of said depressible keys therethrough;
wherein said key contacts underlie said at least one anti-tampering grid;
wherein said key assembly is constructed such that said key contacts define an open electrical circuit when a key of said depressible keys is depressed and define a closed electrical circuit when a key of said depressible keys is not depressed; and
wherein said protective partial enclosure includes a top anti-tampering grid overlying said key assembly and having grid apertures aligned with said key apertures and said protective partial enclosure includes a bottom anti-tampering grid underlying said key assembly.
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Abstract
A data entry device including a housing including a top housing portion including key apertures, a plurality of data entry keys mounted in the housing to have data entry key depression travel paths in the housing, the plurality of data entry keys being associated with a substrate, which is disposed below the top housing portion and anti-tampering electrical conductors arranged between the top housing portion and the substrate thereby to prevent unauthorized access to the substrate.
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Citations
5 Claims
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1. A data entry device comprising:
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a housing including a top housing portion including key apertures; a key assembly including a plurality of depressible keys, which partially extend through said key apertures and key contacts which do not underlie said key apertures; a protective partial enclosure at least partially surrounding said key assembly, said protective partial enclosure including at least one anti-tampering grid formed of a multiplicity of interconnected anti-tampering electrical conductors and being formed with apertures aligned with said key apertures for permitting displacement of said depressible keys therethrough; wherein said key contacts underlie said at least one anti-tampering grid; wherein said key assembly is constructed such that said key contacts define an open electrical circuit when a key of said depressible keys is depressed and define a closed electrical circuit when a key of said depressible keys is not depressed; and wherein said protective partial enclosure includes a top anti-tampering grid overlying said key assembly and having grid apertures aligned with said key apertures and said protective partial enclosure includes a bottom anti-tampering grid underlying said key assembly. - View Dependent Claims (2, 3, 4, 5)
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Specification