Abstract: The present invention relates to aqueous polymer dispersions of polymers made of polymerized ethylenically unsaturated monomers M which comprise or consist of: a) 55 to 88% by weight, based on the total weight of the monomers M, of at least one monomer Ma consisting of a1) at least one monomer Ma(1) selected from alkyl acrylates having a branched alkyl radical having 3 to 20 carbon atoms, alkyl methacrylates having a branched alkyl radical having 5 to 20 carbon atoms, where the homopolymer of monomer Ma(1) has a theoretical glass transition temperature of at most 10° C.

Abstract: A predetermined pattern of a plurality of conductors are disposed on one surface of a dielectric substrate, a given number of the plurality of conductors each having a gap therein. A dielectric switch block is disposed adjacent one surface of the substrate. A plurality of screws are each disposed adjacent a different one of the gaps and extend into the switch block. Each of the screws have a head thereon that makes and breaks a connection across an associated one of the gaps when the associated one of the screws is screwed in and out of the block.