Clip unit for holding contact

A clip unit in combination with a frame that has a passageway with an axis and a contact that lies in said passageway, wherein:

• said passageway has a constriction where the inside diameter of the passageway is reduced, the constriction having front and rear ends and the inside diameter of the passageway is greater forward and rearward of said constriction than at said constriction;
• said contact has a neck of reduced outside diameter and said contact has front and rear collars lying respectively forward and rearward of the neck, said collars having larger outside diameters than the outside diameter at said neck, said neck lying within said constriction in said passageway;
• said unit has front and rear ring-shaped elements that each has a hole lying on said axis and forming a hole inside surface, that each has an outside surface, and that each has a slot extending from said outside surface to the corresponding hole inside surface, said front and rear elements being isolated from each other so the slot of each can be individually compressed and expanded;
• said front element is of larger outside diameter than said rear element, said front element has a front surface substantially abutting a rear end of said front collar, and said front element has a rear surface abutting a front end of said constriction, to prevent rearward movement of the contact;
• said rear element has a radial thickness about equal to the radial space between said contact neck and said passageway constriction, to radially position said contact in said passageway.

A method for establishing a clip unit that includes a front element that has a slot and a rear ring-shaped element that has a slot, between a contact that has a neck and walls of a passageway that has a constriction, comprising:

• installing the front element in the contact neck by expanding the slot and pressing the element onto the contact neck;
• installing the contact with the front element thereon in the passageway by pressing the contact forwardly along the passageway, including using a rear end of the constriction to compress the front element so it passes through the constriction, and allowing the front element to expand when it lies forward of the constriction and abut a front end of the contact neck and abut a front end of the constriction to prevent rearward movement of the contact;
• installing said rear element in the contact neck behind the front element;
• and
• while said front element is passing through said constriction, moving said rear element into said constriction to radially position said contact.