Browse Prior Art Database

Shielding and Vandal Protection for Touch Sensitive Panel

IP.com Disclosure Number: IPCOM000079062D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Harris, TJ: AUTHOR [+2]

Abstract

Modular touch-sensitive panels comprising laminar configurations of flexible cover membranes, actuator membranes and switch contact membranes are subject to usage in equipment generally accessible to the public (e.g., automated street-accessible bank and/or credit-transaction terminals), and thereby subject to vandalism. In such an environment, it is desirable to provide electrical signal indications as soon as vandalism occurs. These signals could be communicated to control centers, controlling removal of the bank identification booklet or credit card at the point of entry. The controls could also record the instantaneous condition of the system and trigger a camera at the point of entry, to photograph the vandal.

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Shielding and Vandal Protection for Touch Sensitive Panel

Modular touch-sensitive panels comprising laminar configurations of flexible cover membranes, actuator membranes and switch contact membranes are subject to usage in equipment generally accessible to the public (e.g., automated street-accessible bank and/or credit-transaction terminals), and thereby subject to vandalism. In such an environment, it is desirable to provide electrical signal indications as soon as vandalism occurs. These signals could be communicated to control centers, controlling removal of the bank identification booklet or credit card at the point of entry. The controls could also record the instantaneous condition of the system and trigger a camera at the point of entry, to photograph the vandal. The controls could also notify the police, disconnect the panel from the system to avoid further erroneous operation, sound an audible alarm at the point of entry, record the time of day, etc. Thus, although the arrangement to be described cannot prevent vandalism, it could discourage it.

The actuator layer contains clusters of small holes positioned to register with the touch points (contact spaces) of the contact array at positions of stress (i.e. at edges of the contact voids in a spacer layer of the contact array), and thereby provide stress relief for the conductors in the contact array. The actuator and switch contact layers are made by a similar process in which MYLAR* sheets preclad with copper are photoetch processed, to produce appropriate configurations of stress-relief perforations in actuator layers, and contact space voids and contact conductors in switch layers.

For present purposes of shielding and vandalism detection the copper foil on the a...