Card reader

Details Card reader Card reader

1991-09-10

1993-07-27

Dzierzynski, Paul M.

Registers

Coded record sensors

Particular sensor structure

439886, 439887, 439 64, 439 66, G06K 1906

Patent

active

052312747

ABSTRACT:
A card reader (2) especially for use in connecting gold plated pads on a subscribers identity module card (4) to respective tin plated pads on a printed circuit board (6) in a car telephone handset, comprises an insulating frame (8) having spigots (26) for fixing it to the circuit board 96), and a metal cover (12). A bar (22) spanning the frame (8) supports contact elements (10) molded thereinto. Each contact element (10) has a 10 contact spring (40) provided with a bowed, gold plated contact surface (5) near its free end for engaging a respective gold plated pad on the card (4), and intermediate its ends, an oppositely bowed, tin plated, contact surface (44) for engaging a respective tin plated pad on the circuit board 96). With the card (4) resting on a ledge (18) in the frame (8), the metal cover (12) is latched to the frame (8) to force the contact surfaces (44 and 50) against their respective pads. The contact springs (40) are so configured that the contact forces (F1 and F2) applied by, and the length of wipe of, the contact surfaces (44 and 50) is appropriate to the plating thereon and the plating on the pads engaged thereby.

REFERENCES:
patent: 4236667 (1980-12-01), Crowley et al.
patent: 4769908 (1988-09-01), Olsson
patent: 4780603 (1988-10-01), Hamada

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