Abstract: A resilient contact pin for contacting electrical or electronic items to be tested, such as conductor plates, printed circuit boards or the like, the resilient contact pin being electrically conductive and intended for mounting on a testing arrangement, includes a straight cylindrical member including a metallic tube constituted by a punched and bent sheetmetal part. A contact member includes a piston accommodated in the metallic tube for axial sliding and a frontward end portion projecting out of the metallic tube and serving for contacting the item to be tested. A spring is accommodated in the metallic tube and urged the contact member in a frontward direction relative to the metallic tube. There is further provided at least one lug constituted by an integral region of a circumferential wall of the metallic tube and extending into the interior of the metallic tube to constitute an abutment which limits the extent of the frontward movement of the piston of the contact member.

Abstract: A testing adapter for the contacting of conductor plates for the purpose of their testing includes a plurality of metallic resilient contact pins. Each of these pins includes a cylinder in which a piston of a piston member is received for axial sliding. The piston member extends beyond a cylinder jacket of the cylinder and passes through a bore of a rear guiding plate of the testing adapter. A helical compression spring is arranged on that region of the piston member which extends beyond the cylinder jacket. The piston member is shorter than one-half of the overall length of the resilient contact pin in its relaxes state, and the helical compression spring is at least partially accommodated within the respective bore of the rear guiding plate.

Abstract: A resilient contact pin for contacting electrical or electronic items to be tested, such as conductor plates, printed circuit boards or the like, the resilient contact pin being electrically conductive and intended for mounting on a testing arrangement, includes a straight cylindrical member including a metallic tube constituted by a punched and bent sheet metal part. A contact member includes a piston accommodated in the metallic tube for axial sliding and a frontward end portion projecting out of the metallic tube and serving for contacting the item to be tested. A spring is accommodated in the metallic tube and urges the contact member in a frontward direction relative to the metallic tube. There is further provided at least one lug constituted by an integral region of a circumferential wall of the metallic tube and extending into the interior of the metallic tube to constitute an abutment which limits the extent of the frontward movement of the piston of the contact member.

Abstract: The contactor is used for an electronic tester for testing of electronic items such as printed circuit boards, integrated circuits or the like. It has at least one resilient contact pin which has a piston member and a spring. The piston member and the spring are formed in a single piece from a single piece of metal sheet.

Abstract: A spring-loaded contact pin for testing a plurality of closely spaced contacts of a test sample includes a casing in which a plunger is movably guided and under the influence of a spring in tension. In order to allow a simultaneous testing of these contacts, the casing as well as the plunger of the contact pins have an oblong cross section which means that the dimension in one direction is longer than the dimension in a direction normal to the one direction.

Abstract: A probe assembly for testing at least partially conductive elements has a dielectric base plate, a plurality of conductive supports on the base plate generally insulated from each other thereby, and each having a forwardly open socket having a forwardly concave socket surface, and a plurality of conductive contact rods, each having a substantially part-spherical rear ball end having an outer surface, and resting in a respective one of the sockets, and a forwardly directed front test end. According to the invention one of the surfaces is formed with at least one edge engaging only in line contact with the other surface. Thus, when the tips are engaged with conductive regions of an element to be tested, electrical connection can be made at the region of line contact between the contact rod and support.