Electrical Contact and Testing Apparatus
First Claim
1. An electrical contact device, comprising:
- a base having upper and lower ends, a bore extending between the upper and lower ends, an upper portion adjacent to the upper end, a lower portion adjacent to the lower end and an outer surface, wherein the upper portion has a cylindrical shape that has an outside diameter that is smaller than the width or outside diameter of the lower portion such that an outside shoulder is defined on the outer surface between the upper and lower portions, wherein a lower inside shoulder is provided that protrudes into the bore between the upper and lower ends, wherein an upper inside shoulder is provided near or adjacent to the upper end that protrudes into the bore, wherein the lower inside shoulder is spaced apart from the upper inside shoulder;
a crown spring received in the bore of the upper portion between the lower and upper inside shoulders, wherein the crown spring defines a crown spring bore;
an elongate rod having a bottom portion received in sliding engagement with the crown spring within the crown spring bore and a top portion protruding from the base, wherein the top portion of the rod has a flange; and
a coil spring surrounding the rod and the upper portion of the base between the flange on the rod and the outside shoulder on the base.
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Accused Products
Abstract
An electrical contact device includes a tubular element, a crown spring in the tubular element, a solid or hollow cylinder slideably received in the crown spring and a coil spring engaged with the cylinder for applying force while the cylinder is pressed against a test item and tor returning the cylinder to a relaxed position, The crown spring holds the cylinder in the tubular element and allows the cylinder to slide back and forth while providing electrical connectivity between the cylinder and the tubular element. An electrical contact device includes a rod-shaped probe having a contact end and a contact sheet fixed to the probe, where the contact sheet has a plurality of prongs bent over the contact end of the probe for providing a plurality of contact points between the probe and a test item.
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Citations
29 Claims
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1. An electrical contact device, comprising:
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a base having upper and lower ends, a bore extending between the upper and lower ends, an upper portion adjacent to the upper end, a lower portion adjacent to the lower end and an outer surface, wherein the upper portion has a cylindrical shape that has an outside diameter that is smaller than the width or outside diameter of the lower portion such that an outside shoulder is defined on the outer surface between the upper and lower portions, wherein a lower inside shoulder is provided that protrudes into the bore between the upper and lower ends, wherein an upper inside shoulder is provided near or adjacent to the upper end that protrudes into the bore, wherein the lower inside shoulder is spaced apart from the upper inside shoulder; a crown spring received in the bore of the upper portion between the lower and upper inside shoulders, wherein the crown spring defines a crown spring bore; an elongate rod having a bottom portion received in sliding engagement with the crown spring within the crown spring bore and a top portion protruding from the base, wherein the top portion of the rod has a flange; and a coil spring surrounding the rod and the upper portion of the base between the flange on the rod and the outside shoulder on the base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An electrical contact device, comprising:
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a support base; a tube having opposing upper and lower ends, wherein the lower end is connected to the support base; a crown spring inside the tube; a rod having opposing proximal and distal portions and ends, wherein the proximal portion of the rod is received inside the crown spring, wherein the rod is engaged with the crow n spring in a friction fit that holds the rod within the crown spring and within the tube while also allowing the rod to slide within the crown spring, wherein the rod has a radially-extending flange between the proximal and distal portions; and a coil spring surrounding the tube and trapped between the support base and the flange on the rod, wherein the coil spring tends to push the distal end of the rod away from the support base. - View Dependent Claims (19, 20, 21)
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22. An electrical contact device, comprising:
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a base; a tube having opposing upper and lower ends, wherein the lower end is connected to the base; a crown spring inside the tube; a rod having opposing proximal and distal portions and ends, wherein the proximal portion of the rod is received inside the crown spring, wherein the rod is engaged with the crown spring in a friction lit that holds the rod within the crown spring and within the tube while also allowing the rod to slide within the crown spring, wherein the rod has a first diameter toward the proximal end and a second diameter toward the distal end that is greater than the first diameter, wherein a shoulder is defined between the first and second diameters; and a coil spring surrounding the tube and trapped between the base and the shoulder on the rod, wherein the coil spring tends to push the distal end of the rod away from the base. - View Dependent Claims (23, 24, 25, 26)
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27. A battery testing contact assembly, comprising:
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a support base having a hole; a bolt received in the hole, wherein the bolt has upper and lower ends and a longitudinal bore, and wherein the bolt has an inside shoulder that protrudes into the bore near the lower end; a coil spring received in the longitudinal bore of the bolt, wherein the coil spring abuts the inside shoulder, an elongate current probe having an upper end, an upper portion, a lower end and a lower portion, wherein the upper portion has a diameter that is greater than the diameter of the lower portion, wherein a probe shoulder is defined at the interface of the upper and lower portions, wherein the lower portion is received inside the coil spring, wherein the coil spring abuts the probe shoulder, wherein the coil spring is trapped between the inside shoulder of the bolt and the probe shoulder of the current probe; a nut fixed to the bolt that fastens the bolt to the support base; and a contact sheet having a base portion and a plurality of fingerlike projections extending from the base portion, wherein the base portion of the contact sheet is fixed to and electrically connected with the upper portion of the current probe, and wherein the plurality of fingerlike projections extend over and partially cover the upper end of the current probe. - View Dependent Claims (28, 29)
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Specification