Electrical terminal blocks

Details Electrical terminal blocks Electrical terminal blocks

1975-01-20

1977-06-07

Lake, Roy

Geometrical instruments

339110P, 339113B, 339128, 339198P, 339272A, H01R 910, H01R 1360, H01R 1362

Patent

active

040279375

ABSTRACT:
Disclosed terminal blocks are secured in position in an opening in a sheet-metal panel, with terminal screws extending at a small angle to the panel. Screw-driver thrust against the screws is resisted by engagement of the body of the terminal block against an edge of the opening. Resilient detents for holding the terminal block assembled to the panel are at the sides of the terminal block and are not affected by screw-driver thrust. The terminal block is locked to the panel along one edge of the opening by hooks extending from barriers between the circuit connectors. A circuit coding strip is carried by these hooks, useful in preliminary wiring and after the block is mounted on the panel.
One illustrative terminal block has plug-in contacts that are engaged by companion plug-in contacts of a plug-in unit. The body of the plug-in unit cooperates with detent-bearing portions of the stationary terminal block so as to block releasing deflection of the detents preliminary to engagement of the plug-in contacts and during the forcible completion of the plug-in operation. The plug-in unit has a shouldered projection that is received between parts of the stationary terminal block to establish preliminary alignment between both sets of plug-in contacts. The projection and its shoulder are separable from and cooperate as a fulcrum with mating stationary structure in a pivotal plug-in motion of the plug-in unit. One or more tapered cavities in the plug-in unit receive a screw driver which thereafter serves as a lever extension for forcibly pivoting the plug-in unit into or out of its plugged-in condition.

REFERENCES:
patent: 1461355 (1923-07-01), Irwin
patent: 2848703 (1958-08-01), Foote et al.
patent: 2885652 (1959-05-01), Rowe
patent: 2899669 (1959-08-01), Johanson
patent: 3184700 (1965-05-01), Burke et al.
patent: 3201557 (1965-08-01), Poulton, Jr.
patent: 3244941 (1966-04-01), Maynard et al.
patent: 3346777 (1967-10-01), Leonard et al.
patent: 3514743 (1970-05-01), Schantz
patent: 3567911 (1971-03-01), Grundberg et al.
patent: 3812450 (1974-05-01), Simovits, Jr. et al.
patent: 3816821 (1974-06-01), Rhodes

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