All voting machines used in any election shall be provided with a screen, hood or curtain, which shall be so made and adjusted as to conceal the voter and his action while voting.
It shall also be provided with one device for each party for voting for all the presidential electors of that party by one operation, and a ballot therefor containing only the words "presidential electors for," preceded by the name of that party and followed by the names of the candidates thereof for the offices of President and Vice-President and a registering device therefor which shall register the vote cast for such electors when thus voted collectively.
N.J.S. § 19:48-1