公开(公告)号：US3571778A

公开(公告)日：1971-03-23

申请号：US3571778D

申请日：1968-07-01

Applicant: VISHAY INTERTECHNOLOGY INC

Inventor： SMITH JOHN P JR

IPC: G01R1/20 ,  H01C7/00 ,  H01C1/16

CPC classification number: H01C7/00 ,  G01R1/203

Abstract: An ohmic standard apparatus having five rocker arm type switches and four resistors associated with each switch. The switches provide a digital readout of the total resistance for resistance settings from 0 to 99,999 ohms. A slide wire type resistor is interconnected with the resistors to provide resistance settings up to 100,000 ohms.

公开(公告)号：US3474375A

公开(公告)日：1969-10-21

申请号：US3474375D

申请日：1968-07-01

Applicant: VISHAY INTERTECHNOLOGY INC

Inventor： SMITH JOHN P JR

IPC: G01R1/20 ,  H01C1/016 ,  H01C1/024 ,  H01C1/028 ,  H01C1/02 ,  H01C1/14

CPC classification number: G01R1/203 ,  H01C1/016 ,  H01C1/024 ,  H01C1/028