Phase detection electrical connection device

A phase detection electrical connection device comprising:

• a substrate having a first conductor pattern and a second conductor pattern that are concentrically disposed on a surface of said substrate about an axis of rotation of said substrate;
• a contact having two contact terminals, said contact terminals being disposed to touch said surface on which said first conductor pattern and said second conductor pattern are formed;
• said substrate and said contact being rotatable relative to each other, a first track being defined at locations where said substrate surface and a first one of said two contact terminals touch each other during relative rotation of said substrate and said contact, a second track being defined at locations where said substrate surface and a second one of said two contact terminals touch each other during relative rotation of said substrate and said contact;
• said first conductor pattern including a plurality of ON pattern sections that intersect only said first track at regularly spaced intervals, and a first OFF pattern section that intersects both said first track and said second track;
• said second conductor pattern including a plurality of ON pattern sections corresponding in number to said plurality of ON pattern sections of said first conductor pattern, said plurality of ON pattern sections of said second conductor pattern being aligned with said plurality of ON pattern sections of said first conductor pattern such that said plurality of ON pattern sections of said second conductor pattern intersect only said second track at said regularly spaced intervals;
• said second conductor pattern including a plurality of second OFF pattern sections that intersect both said first track and said second track, said first OFF pattern section being interposed between two of said plurality of ON pattern sections, said plurality of second OFF pattern sections being interposed between said plurality of ON pattern sections except between said two ON pattern sections where said first OFF pattern section is interposed.

A film feed position detecting device comprising:

• a camera body;
• a shutter assembly attached to a front side of said camera body;
• and
• a phase detection device located in said camera body adjacent to a film winding portion of said camera, said phase detection device comprising:
• a substrate having a first conductor pattern and a second conductor pattern formed on a surface of said substrate;
• a contact having two contact terminals, said contact terminals being disposed to touch said surface on which said first conductor pattern and said second conductor pattern are formed;
• said substrate and said contact being movable relative to each other, a first track being defined at locations where said substrate surface and a first one of said two contact terminals touch each other during relative movement of said substrate and said contact, a second track being defined at locations where said substrate surface and a second one of said two contact terminals touch each other during relative movement of said substrate and said contact;
• said first conductor pattern having at least one first OFF pattern section that intersects both said first track and said second track, said two contact terminals simultaneously touching said first OFF pattern section when said substrate and said contact are in a first predetermined position relative to each other;
• and
• said second conductor pattern having at least one second OFF pattern section that intersects both said first track and said second track, said two contact terminals simultaneously touching said second OFF pattern section when said substrate and said contact are in a second predetermined position relative to each other.