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Start Test Control

IP.com Disclosure Number: IPCOM000050155D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Davis, SL: AUTHOR [+2]

Abstract

In prior hand plugging operations, the operator must independently mechanically actuate the electrodes in the socket so as to contact the pins on the module and then subsequently depress a tester start button and then wait until the test has been completed, as indicated by the tester before consciously releasing the mechanical electrodes from the module pins. This article describes an invention which solves this problem.

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Start Test Control

In prior hand plugging operations, the operator must independently mechanically actuate the electrodes in the socket so as to contact the pins on the module and then subsequently depress a tester start button and then wait until the test has been completed, as indicated by the tester before consciously releasing the mechanical electrodes from the module pins. This article describes an invention which solves this problem.

The logic block diagram of the figure illustrates the start test control which automatically carries out the combined operations of mechanically actuating the electrodes in the air socket to contact the pins on the module and then, after a predetermined delay, sending a start tester signal to the tester to commence the test. The circuit will then await a test complete signal from the tester and will then automatically release the electrodes, mechanically, from the module pins.

Referring to the figure, the foot switch 1 is connected between ground and a load device, through which a +5 volt potential can be applied to the input terminal of the one shot 2 and the input terminal of the one shot 6, when the foot switch is in its noncontacting position. When the foot switch is closed, the potential applied to the input terminals of the one shots 2 and 6 goes to ground potential and each of the one shots 2 and 6 is activated.

The one shot 2 will output a positive going 5 millisecond duration signal which is applied to the set input of the flip flop 3.

The flip flop 3 will then set and apply an output enabling signal to the NpN bipolar transistor 4, thereby turning on the air solenoid 5. The air solenoid 5 mec...