In order to have a thorough comprehension of the following description of some of the “fake” boxes now in use, it may be well that the reader understand the object sought to be gained through them. The rules of the game require that but one card shall be dealt at a time. To a dealer determined to win, it is of the utmost importance to know, before the card issues from the box, what that card is going to be. In this, he is greatly aided by the preparation of the cards as described above. Still, he needs some mechanical device through which he may put this knowledge into practical operation, either by failing to deal any certain card at a moment when its issuance from the box means loss to the bank, or by putting out a card which is sure to win for himself. To give him this advantage he uses a box so constructed that he can control its operations at will. It will thus be seen that his cards and his box supplement each other. To know the cards would avail him nothing unless he might use those which he needed; to be able to deal fraudulently would be of no possible advantage, unless he knew precisely which card to deal. Taken together, they form a combination so strong as to be impregnable to the dupe who fancies that he and his crafty opponent meet on a fair field in open, even if not honorable, combat.
At the present time, the “fraternity” generally use one of three varieties of boxes, known respectively as the “lever,” or “end squeeze movement,” the “needle movement,” and the “sand tell” box. Of these, the former is the most common, and the second the most expensive, while the third is commonly employed for a special purpose, which will be explained.
The accompanying cut shows the mechanism of the “screw box,” at one time very popular with gamblers, and still used in some houses.
The front side of this box, “A,” is provided with three thin perpendicular plates, of which two are stationary, but all of which seem to be solidly joined together. Between the stationary plates “B” and “D,” whose inner surfaces are so highly polished as to reduce friction to a minimum, slides another and invisible plate, marked “C,” and which is adjustable and highly sensitive to the secret manipulation of the practiced dealer. This centre piece “C,” when properly placed and at rest, presents an upper edge a trifle above the two stationary plates, leaving an aperture so narrow that the dealer can take but one card from the box at a time.