902,404. Electrical calculating apparatus. STANDARD TELEPHONES & CABLES Ltd. Dec. 19, 1958 [Dec. 23, 1957], No. 3813/62. Divided out of 902,401. Class 106 (1). [Also in Group XXXIX] A static magnetic distributer AS comprises a matrix of cores in which the rows are set sequentially to a first state by a pulse and the columns are pulsed sequentially to restore the individual cores, whereby an output pulse appears on the output winding of each of the cores of the matrix in sequential order. The pulses are applied to successive rows of a ferrite matrix store FS used to register metering pulses as described in Specification 902,401. Specifications 781,331 and 902,403 also are referred to.