公开(公告)号：US3631229A

公开(公告)日：1971-12-28

申请号：US3631229D

申请日：1970-09-30

Applicant: IBM

Inventor： BENS FREDERICK N ,  DIMITRI KAMAL E ,  MOORE MICHAEL J ,  TOMKO JOHN E ,  WAJDA WALTER W

IPC: G01R31/319 ,  G11C29/56 ,  G01R15/12

CPC classification number: G01R31/31917 ,  G11C29/56

Abstract: A method and apparatus are disclosed for testing on a simulated real time basis a chip or monolithic memory array. The tester is interfaced to a computer with which it communicates in a cycle steal mode of operation. The test pattern which tests the basic failure modes that can occur in the array is loaded into an area of the computer core storage whose address is given to the tester by an instruction. Another core address is given to the tester which is the area where results of the test are stored. A failure diagnosis program makes a decision as to which failure mode occurred, and the results of the diagnosis are printed out with digital coding to indicate the type of failure. Since the entire test is done in continuous cycle steal mode, the time involved is only a few milliseconds, depending on the length of the pattern.

公开(公告)号：US3607092A

公开(公告)日：1971-09-21

申请号：US3607092D

申请日：1970-03-23

Applicant: IBM

Inventor： NEFF GORDON W ,  TOMKO JOHN E

IPC: G01N1/38 ,  G01N33/16

CPC classification number: G01N1/38 ,  Y10T137/86083

Abstract: An automatic fluid sample apparatus for the chemical analysis of fluids is described. In the apparatus, a plurality of samples are substantially simultaneously precisely measured out and diluted or mixed with the proper quantity of diluent and/or reagent. A series of tubing valves, preferably of the T-type, in one position permit sample containers having the desired sample volume to be filled with samples of fluid to be analyzed from a fluid source through the action of a vacuum pump. The valves are then placed in a second position whereby the samples flow from the sample containers to recipient containers and respective proper quantities of diluent or reagent are caused to flow through the valves and the sample containers into the recipient containers.

公开(公告)号：US3689378A

公开(公告)日：1972-09-05

申请号：US3689378D

申请日：1969-01-15

Applicant: IBM

Inventor： NEFF GORDON W ,  SAMBUCETTI CARLOS J ,  TOMKO JOHN E

IPC: G01N27/30 ,  G01N27/333 ,  G01N27/416

CPC classification number: G01N27/333

Abstract: A HIGH IMPEDANCE VOLTMETER IS COUPLED ON ONE SIDE TO A STANDARD REFERENCE ELECTRODE AND ON THE OTHER SIDE TO A PH SENSITIVE URANIUM OXIDE (U308) ELECTRODE. THE LOW ELECTRICAL IMPEDANCE URANIUM OXIDE ELECTRODE COMPRISES A NOBLE METAL WIRE COATED WITH A THIN SMOOTH LAYER OF URANIUM OXIDE.

公开(公告)号：US3591482A

公开(公告)日：1971-07-06

申请号：US3591482D

申请日：1969-04-23

Applicant: IBM

Inventor： NEFF GORDON W ,  SAMBUCETTI CARLOS J ,  TOMKO JOHN E

IPC: G01N27/40 ,  G01N27/333 ,  G01N27/30

CPC classification number: G01N27/3335 ,  Y10T428/2942

Abstract: THE SILVER CHLORIDE LAYER OF A SILVER-SILVER CHLORIDE ELECTRODE IS COATED WITH A THIN PROTECTIVE LAYER OF METHACRYLATE. THE LAYER OF METHACRYLATE ACTS TO PREVENT CORROSION OF THE SLIVER CHLORIDE LAYER AND YET ALLOWS SAME TO REATAIN ITS ION SENSITIVITY.