Socket-contacts

It is important to seat the socket onto the PWB such that it is maintained parallel to the PWB. Applying it at an angle can cause damage to the delicate contacts of the socket and compromise contact reliability. The same can be said about sliding the socket on the board it is likely to result in socket contact damage. 

The electric leads for heaters and thermocouples are located in grooves milled in the mould plates, and normally run to the top of the mould, on which a standard socket-contact is fastened. 

Figure 5.15 Examples of HR system socket-contacts Continued...

Grevsten S, U Erikson. (1975) A roentgenological study of the stump-socket contact and skeletal displacement in the PTB-Suction Prosthesis. Ups J Med Sci 80(1) 49-57. 

Base Metal Finishes. The low cost of base metal finishes obviates selective coating. Electro deposition is used for 0.5—5 p.m thick coatings of tin and tin—lead alloy, usually about 50 wt % Sn, 50 wt % Pb, on electronic connector contacts, on contacts at the edges of printed circuit boards, and on terminals. Sheet copper alloys that have been coated with tin—lead alloy are widely used for contacts that are stamped and then formed into the desired shapes, such as pins having a closed end and sockets. Aluminum connectors that have utility—industrial appHcations are more thickly coated, and hot-dipping in molten tin is common. 

Plugs, socket-outlets and couplers for industrial purposes. Dimensional interchangeability requirements for pm and contact-tube accessories. Superseded BS EN 60309-2 1998, which remains cuiTcnt... 

In Figure 9-7 and Figure 9-8, we have the answer to all our prayers. I used it for a 600mA Buck IC project recently with excellent results. Finding a vendor for this socket is very difficult. So I decided to share the contact info of the only person I know doing this. It seems to be a one-man show, and these sockets are custom-made on demand. But they have saved me months of evaluation time. Contact Weber at Rainbow Labs. Address 260 2nd Avenue, San Francisco, CA 94118, USA. Tel 415-387-4430, Fax 415-221-3640. No, I don t know them personally, and I have no commercial stake in their operations. The information is put out only to help you, since this sort of service is very rare. 

This experiment uses a socket board available from Radio Shack (catalog number 276-175). The socket board has the layout shown in Figure 6.13, each black square representing a socket (or hole) with metal lining into which a wire can be inserted for electrical contact. The sockets in each set of five sockets in the top and bottom horizontal rows are connected internally, as indicated with the horizontal lines. The sockets in each set of five sockets A to E and F to J in each vertical column are also connected internally,... 

Multimeters have sockets into which test leads are inserted. Test leads are insulated wires that have banana plugs on one end, for insertion into the sockets, and metal tips on the other end, for contacting the points in the circuit that are being measured. 

Check out the socket board to verify the statements above indicating which sockets are connected internally. To do this, set the multimeter to measure resistance (set to the 2-KQ range) and touch the contact tips of the test leads to any two sockets on the board. If there is internal contact, the resistance measurement will be zero (no resistance). If there is no internal connection, it is an open circuit and the resistance will be infinite. Record the results for each pair of sockets tested. 

Now measure one of your resistances with the multimeter as follows. Insert the wire ends into two sockets on the socket board so that they are not connected internally, such as in sockets FI and F5. (You will have to bend the end wires at about a 90° angle.) Measure the resistance with your multimeter by setting the selector switch to measure resistance and then contacting the lead tips to sockets that make contact with FI and F5, such as G1 and G5. You may have to adjust the selector switch to the proper range for the resistor being measured. Record the value in your table. Measure all the other resistors in the same way. Determine if the accuracy of each, as indicated by either the gold or silver stripes, is correct based on your data and comment on this. 

Approximately 40 % of the thermoplastic polyester resin that is sold (excluding PET packaging resins) is flame-retarded. PET used for switches, sockets and other applications where the material is in direct contact with live parts of electronic and electrical appliances are required to be flame retardant. 

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