Court allocation device in tennis halls etc. - uses coded cards and card retainer, releasing court allocation, and has lock preventing card insertion on complete occupation

摘要

The court occupation is allocated by using a coded card for an unspecified hour of play, or for renting a subscription for each weekday at a specified time. The card is inserted into an aperture whose acceptance releases a court allocation. This aperture has a locking barrier, preventing the card insertion when the required time is engaged by other subscribers. The barrier is supplied with timed hourly pulses from a circuit board which has a series of input lines, engaged by the hourly pulses. These input lines are intersected by second conductive lines, supplying the pulses to the barrier. Each line of the first series is connectable to each line of the second series by a conductive jet. Preferably the connecting possibilities are given by a term 7 n.p. in which the figure 7 represents the number of days in a week, n equals the number of available courts. For each weekday p conducting lines of the second group are cyclically connected to the card aperture. The barrier may be formed by a blocking relay which may prevent switching-on of a motor effecting the card pull-in.