公开(公告)号：US3557310A

公开(公告)日：1971-01-19

申请号：US3557310D

申请日：1968-07-03

Applicant: FARRINGTON MFG CO

Inventor： PRESTI ANTHONY J ,  KERSTA LAWRENCE G

IPC: G10L15/00 ,  G10L1/08

CPC classification number: G10L15/00

Abstract: Speech recognition equipment is disclosed which distinguishes the sounds ''''OH'''' and ''''ONE'''' (respectively corresponding to the numerals 0 and 1). The recognition equipment takes advantage of the fact that the characteristic frequency of the second formant of ''''OH'''' increases with the time while the characteristic frequency of the corresponding formant of ONE decreases with respect to time. The sound to be recognized is fed to a frequency discriminator after a test has been made to distinguish the sound from background noise. The discriminator output is applied to two sampling circuits, one of which samples the discriminator output signal shortly after the presence of the sound is detected and the second of which samples the signal shortly after the first sample is taken. The samples are held in capacitive storage means. After both samples have been taken, the outputs of the capacitors are applied to a subtractor. Thus, the polarity output of the signal from the subtractor indicates whether the sound was ''''OH'''' or ''''ONE.

公开(公告)号：US3532834A

公开(公告)日：1970-10-06

申请号：US3532834D

申请日：1968-09-20

Applicant: FARRINGTON MFG CO

Inventor： PRESTI ANTHONY J

IPC: G10L21/06 ,  G10L1/02 ,  G11B27/36 ,  G11B31/00

CPC classification number: G10L21/06

公开(公告)号：US3564210A

公开(公告)日：1971-02-16

申请号：US3564210D

申请日：1968-11-29

Applicant: FARRINGTON MFG CO

Inventor： PRESTI ANTHONY J

IPC: G06Q40/02 ,  G07F7/12 ,  G06K5/00

CPC classification number: G07F7/08 ,  G06Q40/02 ,  G07F7/12

Abstract: Disclosed is a credit verification imprinter for use with a credit card embossed or etched with data typically corresponding to the customer''s name, address, and numerical identification. Also provided on the card is magnetically BCD encoded data relating to (1) the charge limit the card may be used for in a predetermined period of time, preferably a month; (2) the time interval in which the card was last used; and (3) the accumulated money total of charge purchases made with the card during the time interval indicated in (2). The sales clerk registers into a variable money amount imprinter the money amount of the current transaction together with the current date, this information to be imprinted together with the information of the charge onto a sales slip or the like if the current credit transaction is approved. Before the imprinting operation can take place, the magnetically encoded data is read by movable read/write head disposed beneath the print bed. A credit verification test is then conducted by appropriate circuitry to determine whether the card has been used for credit transactions exceeding the limit listed in (1) above during the interval of time indicated by the month setting on the variable date wheels of the imprinter. Other checks are also made to establish the authenticity of the information magnetically encoded on the card to insure that no tampering or data transmission errors have occurred. Different colored lights are provided on the imprinter chassis to indicate the occurrence of different conditions detected by the data verification circuitry. Upon completion of the data verification check, a stop is removed from the path of travel of the imprinting head thereby permitting the imprinting operation to take place. After the imprinting head has been returned to its start position a switch is caused to close and thereby reset all credit verification registers preparatory to the next credit operation.