Keying block extracting tool

Details Keying block extracting tool Keying block extracting tool

1981-11-16

1984-02-28

Hall, Carl E.

Metal working

Means to assemble or disassemble

Means to disassemble electrical device

29256, 29283, 269234, 269246, 269287, 294 86R, 294103R, H05K 332, H05K 1304, H01R 4300

Patent

active

044334770

ABSTRACT:
An extracting tool (14 ) for extracting a keying block (12) having keying pins (13) extending outwardly therefrom from the terminal pins (11) of a backplane (10) of an interconnection system. A keying pin seizing mechanism is retained on a mounting card (27) dimensioned to fit between the rails 17 and 18 of a guide frame normally holding a circuit board. The seizing mechanism comprises a pair of adjacent vise blocks (15, 16) having aligned holes (19) to correspond to the locations of the keying pins (13). When the card (27) is fully inserted in the guide frame, the keying pins (13) of the keying block (12) pass through the aligned holes (19) of both vise blocks (15, 16). The latter blocks have opposing parallel faces (20, 21) lying at an angle to the axes of the keying pins (13). A finger operated screw mechanism (23, 24, 30) is provided to draw one vise block (15) against the other (16), a resultant force caused by the wedge action of the vise block parallel faces causing a slight lateral movement of one block (16). A slight shear stress is thus applied to the keying pins (13) to firmly grip them. The mounting card (27) along with the thus seized keying block (12) may then be withdrawn from the guide frame.

REFERENCES:
patent: 2092372 (1937-09-01), Goeller
patent: 2674772 (1954-04-01), Jacobs
patent: 4223934 (1980-09-01), Canceglia et al.

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