Method for fabricating a light emitting diode display socket

• US 4,338,717 A
• Filed: 09/02/1980
• Issued: 07/13/1982
• Est. Priority Date: 09/02/1980
• Status: Expired due to Term

• Current Assignee: Thomas & Betts International Incorporated (ABB Limited)
• Original Assignee: Augat, Inc. (TE Connectivity Ltd. (United Kingdom))
• Inventors: Damon, Neil F.
• Primary Examiner(s): Weidenfeld, Gil
• Assistant Examiner(s): Silverberg, Fred A.
• Application Number:
  US06/183,181
• Time in Patent Office: 679 Days
• Field of Search: 228/136, 228/173 R, 228/180 R, 29/830, 29/837, 29/838, 29/839, 29/840, 339/17 CF, 339/17 LC
• US Class Current: 29/839
• CPC Class Codes: H05K 1/145 Arrangements wherein electric components are disposed between and simultaneously connected to two planar printed circuit boards, e.g. Cordwood modules
• CPC Class Codes: H05K 2201/10128 Display
• CPC Class Codes: H05K 2201/10325 Sockets, i.e. female type connectors comprising metallic connector elements integrated in, or bonded to a common dielectric support
• CPC Class Codes: H05K 3/3405 Edge mounted components, e.g. terminals
• CPC Class Codes: H05K 3/3447 Lead-in-hole components H05K3/3415 takes precedence
• CPC Class Codes: H05K 3/3468 Applying molten solder
• CPC Class Codes: H05K 7/1038 with spring contact pieces H05K7/1046 takes precedence
• CPC Class Codes: Y10T 29/49139 by inserting component lead or terminal into base aperture
• CPC Class Codes: Y10T 29/49142 including metal fusion

Abstract

A method for making a light emitting diode display socket. A standard receiving socket with contact terminals extending in a dual-in-line configuration from one side thereof is coupled to one edge of each of two printed circuit cards having individual terminals extending from another edge. The contact terminals of the socket enter appropriate holes along the one edge of the printed circuit cards. The assembly is then wave soldered to permanently connect the individual terminals and the socket contact terminals to the printed circuit cards. The cards are then folded toward each other to a parallel, spaced confronting position and they are secured in that position for final permanent assembly.

Claims

1. A method for fabricating a socket for a light emitting diode having a dual-in-line configuration of terminals extending from one side thereof, the socket being comprised of a receiving socket having contact terminals extending from one side thereof in dual-in-line configuration, said method comprising the steps of:

forming at least two printed circuit cards with a plurality of contact pads adjacent each of first and second edges, one contact pad at each said edge being connected by means of a printed circuit path to a pad at the other said edge;

forming a first hole through each of said contact pads along said first edge of each said printed circuit card;

forming at least one second hole intercepting each of said contact pads along said second edge of each said printed circuit card;

aligning first and second said printed circuit cards in adjacent spaced planar relationship with said first edges in parallel juxtaposition and said second edges aligned;

placing a terminal against each said contact pad along said second edge, said terminal having a tab projecting into said at least one hole intercepting said contact pads;

inserting said contact terminals of said receiving socket into said holes in said pads along said first edge of said printed circuit cards, said contact terminals in one line being inserted into said holes in one of said printed circuit cards;

simultaneously soldering said terminals and said contact terminals to said printed circuit cards;

then

rotating said first and second printed circuit cards toward each other to a parallel spaced confronting relationship thereby deforming said contact terminals; and

then

fixing said first and second printed circuit cards permanently in said spaced relationship.

2. The method recited in claim 1 and comprising the further step of temporarily holding together the assembly of said receiving socket printed circuit cards and terminals.

3. The method recited in claim 1, wherein said second hole forming step forms a hole along one side of each said second edge contact pad and two spaced holes along the other side of each said second edge contact pad, said terminal having a tab projecting into each said second holes.

4. The method recited in either claim 1, 2 or 3 and comprising the further step of crimping said tab to hold said terminals to said printed circuit cards prior to said soldering step.

5. The method recited in claim 4 wherein said soldering step is accomplished by wave soldering.

6. The method recited in claim 1 wherein said fixing step is accomplished by inserting a spacer member between said first and second printed circuit cards with an end of said spacer member extending through a hole in each said printed circuit card, wherein each said end of said spacer member is staked for permanent connection.

7. A method for fabricating a socket for a light emitting diode having a dual-in-line configuration of terminals extending from one side thereof, the socket being comprised of a receiving socket having contact terminals extending from one side thereof in dual-in-line configuration, said method comprising the steps of:

forming a multiplicity of pairs of printed circuit cards on a large printed circuit board, each said printed circuit card being formed with a plurality of contact pads adjacent each of first and second edges, one contact pad at each said edge being connected by means of a printed circuit path to a pad at the other said edge;

partially separating said printed circuit cards from said large printed circuit board;

forming a first hole through each of said contact pads along said first edge of each said printed circuit card;

forming at least one second hole intercepting each of said contact pads along said second edge of each said printed circuit card, first and second printed circuit cards in each said pair being in adjacent spaced planar relationship with said first edges being in parallel juxtaposition and said second edges being aligned;

placing a terminal against each said contact pad along said second edge, said terminal having a tab projecting into said at least one hole intercepting said contact pads;

inserting said contact terminals of said receiving socket into said holes in said pads along said first edge of said printed circuit cards, said contact terminals in one line being inserted into said holes in one of said printed circuit cards;

simultaneously soldering said terminals and said contact terminals to said printed circuit cards in each of said pairs;

then

rotating said first and second printed circuit cards in each said pair toward each other to a parallel spaced confronting relationship; and

then

fixing said first and second printed circuit cards permanently in said spaced relationship.

8. The method recited in claim 7 and comprising the further step of separating each of said pairs of printed circuit cards from said large printed circuit board prior to said rotating step.