Multi-function tester with removable circuit cartridge
First Claim
1. A multi-function tester comprising a substantially hollow case;
- first and second electrically conductive probes associated with said case;
a cartridge removably receivable within said case;
electrical circuit means contained within said cartridge for performing a predetermined number of tests;
a plurality of electrical contacts on said cartridge connected to said electrical circuit means, said first probe being electrically connected to one of said contacts when said cartridge is received within said case, the number of said electrical contacts corresponding to said predetermined number of tests and being spaced from each other; and
indexing means mounted for movement relative to said case and said cartridge and having a conductive portion connected to said second probe and being successively engageable with different ones of said predetermined number of electrical contacts with movement of said indexing means relative to said case and said cartridge, whereby any one of a plurality of different tests can be performed by moving said indexing means to bring different electrical contacts into engagement with said conductive portion and thereby to electrically connect different electrical contacts to said first and second probes.
1 Assignment
0 Petitions
Accused Products
Abstract
A multi-function tester includes a hollow elongate cylindrical case having a longitudinal axis. A probe needle is fixedly mounted along the axis at one end of the case. A retractable protective sheath is provided which selectively covers and exposes the tip of the probe needle. A transparent cartridge containing electrical circuitry for performing a predetermined number of electrical tests is removably receivable within the case, with a penlite type battery being interposed between the cartridge and the probe needle. A compression spring is interposed between the battery conductive outer case and the probe needle. Electrical contacts connected to the circuitry within the cartridge are in electrical engagement with both the battery conductive outer case as well as to the center or positive terminal of the battery. An indexing arrangement is provided which is connected to another probe and is arranged to successively engage adjacent ones of a predetermined number of electrical contacts provided at the end of the cartridge proximate to the indexing arrangement. The cartridge is interchangeably receivable within the case to facilitate repair of the tester as well as to increase its versatility by permitting different tests or series of tests to be performed by different cartridges insertable into the same tester unit to thereby electrically connect different electrical elements to the tester probes. Lamps within the cartridge light up and provide a visual indication of test results through the transparent cartridge and a slot in the tester case.
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Citations
19 Claims
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1. A multi-function tester comprising a substantially hollow case;
- first and second electrically conductive probes associated with said case;
a cartridge removably receivable within said case;
electrical circuit means contained within said cartridge for performing a predetermined number of tests;
a plurality of electrical contacts on said cartridge connected to said electrical circuit means, said first probe being electrically connected to one of said contacts when said cartridge is received within said case, the number of said electrical contacts corresponding to said predetermined number of tests and being spaced from each other; and
indexing means mounted for movement relative to said case and said cartridge and having a conductive portion connected to said second probe and being successively engageable with different ones of said predetermined number of electrical contacts with movement of said indexing means relative to said case and said cartridge, whereby any one of a plurality of different tests can be performed by moving said indexing means to bring different electrical contacts into engagement with said conductive portion and thereby to electrically connect different electrical contacts to said first and second probes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- first and second electrically conductive probes associated with said case;
Specification