Memory module socket with terminating apparatus

• US 8,936,488 B2
• Filed: 12/05/2012
• Issued: 01/20/2015
• Est. Priority Date: 12/05/2012
• Status: Active Grant

• Current Assignee: Lenovo International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Enterprise Solutions (Singapore) Pte., Ltd. (Lenovo Group Ltd.)
• Inventors: Bahali, Sumanta K., Sass, Tony C., Vernon, Kevin S. D., Wormsbecher, Paul A.
• Primary Examiner(s): Gilman, Alexander
• Application Number:
  US13/705,245
• Publication Number:
  US 20140153194A1
• Time in Patent Office: 776 Days
• Field of Search: 439/637, 439/60, 439/188, 200/243, 174/75.B
• US Class Current: 439/637
• CPC Class Codes: H01R 12/721 cooperating directly with the edge of the rigid printed circuits
• CPC Class Codes: H01R 13/6616 with resistor
• CPC Class Codes: H01R 13/7197 with filters integral with or fitted onto contacts, e.g. tubular filters

Abstract

A memory module socket and a terminating resistor assembly. The terminating resistor assembly provides an elongate conductive bus bar and a plurality of conductive branches, wherein each conductive branch is in electronic communication with the elongate conductive bus bar through a resistor, wherein each conductive branch has a distal end disposed for contacting a signal pin within a memory module socket installed on a printed circuit board. A distal end of each conductive branch is inserted into a window on the connector shoulder adjacent to the slot of an empty memory module socket and engages a plurality of signal pins within the socket in response to the absence of a memory module in the slot. The plurality of signal pins engage contact pads on the memory module and are pushed out of contact with the conductive branch in response to the presence of a memory module in the slot.

Claims

1. An apparatus, comprising:

an elongate conductive bus bar; and

a plurality of conductive branches, wherein each conductive branch is in electronic communication with the elongate conductive bus bar through a resistor, wherein each conductive branch has a distal end disposed for contacting a signal pin within a memory module socket installed on a printed circuit board.

2. The apparatus of claim 1, wherein each conductive branch is shaped to extend over a top surface of the memory module socket and to dispose the elongate conductive bus bar along a side of the memory module socket.

3. The apparatus of claim 1, further comprising:

a nonconductive body extending across the plurality of branches, wherein the resistor in each conductive branch is secured in an operable position by the nonconductive body.

4. The apparatus of claim 3, wherein the nonconductive body is overmolded onto the plurality of conductive branches.

5. The apparatus of claim 3, wherein each conductive branch comprises:

a conductive bus bar pin secured to the nonconductive body, wherein the conductive bus bar pin has a first end connected to the elongate conductive bus bar and a second end disposed for contact with a first portion of one of the plurality of the resistors; and

a terminating pin secured to the nonconductive body, wherein the terminating pin has a proximal end disposed for contact with a second portion of one of the plurality of resistors.

6. The apparatus of claim 5, wherein the nonconductive body forms a plurality of receptacles, wherein each receptacle is disposed to secure one of the plurality of resistors with the first portion in contact with the second end of the conductive bus bar pin and the second portion in contact with the proximal end of the terminating pin.

7. The apparatus of claim 1, wherein each of the plurality of resistors have an electrical resistance in the range of 50 to 250 ohms.

8. The apparatus of claim 6, wherein each of the plurality of receptacles is configured to removably receive one of the plurality of resistors.

9. The apparatus of claim 8, wherein each of the plurality of receptacles is configured to removably receive one of the plurality of resistors with a surface solder attachment.

10. The apparatus of claim 1, wherein the elongate conductive bus bar is made of copper or a copper alloy.

11. The apparatus of claim 5, wherein the terminating pin is made of copper or a copper alloy.

12. The apparatus of claim 5, wherein the conductive bus bar pin is made of copper or a copper alloy.

13. The apparatus of claim 5, wherein the terminating pin includes a bridging portion shaped to be received and supported on a shoulder of the memory module socket adjacent to a memory module slot.

14. The apparatus of claim 13, wherein the distal end of each terminating pin is turned at an angle relative to the bridging portion to extend into a window on the shoulder adjacent to the slot.

15. The apparatus of claim 14, wherein the bridging portion and the distal end of each terminating pin collectively form a hook to removably support the apparatus on a shoulder of the socket.

16. The apparatus of claim 14, wherein the distal end of each terminating pin forms a contact that is wider than the bridging portion of each terminating pin.

17. An apparatus, comprising:

a memory module socket having a slot for receiving a memory module and a plurality of signal pins disposed in the slot for engaging contact pads on the memory module; and

a terminating resistor assembly having an elongated conductive bus bar and a plurality of conductive branches, wherein each conductive branch is in electronic communication with the elongate conductive bus bar through a resistor, wherein each conductive branch has a distal end disposed for contacting one of the signal pins in response to the absence of a memory module in the slot, and wherein the plurality of signal pins engage contact pads on the memory module and are pushed out of contact with the conductive branch in response to the presence of a memory module in the slot.

18. The apparatus of claim 17, wherein each conductive branch is shaped to extend over a top surface of the memory module socket and to dispose the elongate conductive bus bar along a side of the memory module socket.