Browse Prior Art Database

Wire Wrap Probe

IP.com Disclosure Number: IPCOM000090032D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Nikolsky, G: AUTHOR

Abstract

Wire wrap probe 10 checks the tightness of wrap in wire helix 12 on pin 14. Probe 10 comprises housing 16 including mating sections 18 and 20. Carried within housing 16 is movable probe shaft 21 having pointed tip 22. Shaft 21 is supported for longitudinal movement through section 20. Enlarged rear end 26 of shaft 21 is normally held in engagement with strain gage ring 28 by spring 24. Ring 28 has four strain gages symmetrically mounted on its periphery in a conventional manner to form a bridge circuit that is electrically connected by wires 30...33 to test circuit 34. Probe 10 is calibrated to indicate a preselected force limit. Tip 22 is forced against helix 12, which moves along its pin 14 if unacceptable prior to an indication by circuit 34 that the tested helix is acceptable.

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Wire Wrap Probe

Wire wrap probe 10 checks the tightness of wrap in wire helix 12 on pin 14. Probe 10 comprises housing 16 including mating sections 18 and 20. Carried within housing 16 is movable probe shaft 21 having pointed tip 22. Shaft 21 is supported for longitudinal movement through section 20. Enlarged rear end 26 of shaft 21 is normally held in engagement with strain gage ring 28 by spring 24. Ring 28 has four strain gages symmetrically mounted on its periphery in a conventional manner to form a bridge circuit that is electrically connected by wires 30...33 to test circuit 34. Probe 10 is calibrated to indicate a preselected force limit. Tip 22 is forced against helix 12, which moves along its pin 14 if unacceptable prior to an indication by circuit 34 that the tested helix is acceptable. If the helix is acceptable, however, enlarged end 26 produces stresses that are sensed by the strain gages on ring 28. Two strain gages in tension and two in compression constitute an unbalanced bridge circuit which is sensed and amplified in circuit 34. A threshold detector in circuit 34 triggers an audio device, not shown, to indicate the acceptable helix. Thus, probe 10 permits an inspector to test wrapped wires with one hand without watching instrument indicators during testing.

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