Electromechanical timer with improved blade retention

Details Electromechanical timer with improved blade retention Electromechanical timer with improved blade retention

1989-03-29

1990-09-11

Scott, J. R.

Electricity: circuit makers and breakers

Retarded

Clock train

200 38B, 200283, H01H 4310, H01H 100, H01H 908

Patent

active

049565273

ABSTRACT:
A timer includes a motor-driven cam, switches responsive to the cam, and terminals connected to the switches, all supported in a housing. The housing includes slots to receive the terminal blades and cavities communicating with the slots. The blades of the terminals include a notch with one side perpendicular to the axis of the blade to form a stop and the other side forming a first ramp at an acute angle to the perpendicular. The first ramp is bent out of the plane of the blade to form a second ramp. As a blade is inserted into a slot, the second ramp forces the first ramp into the plane of the blade as it passes through the slot. After passing through the slot, the first ramp snaps into the cavity along a scissoring intersection until the stop engages the housing, at which point the housing is gripped between the first ramp and the stop, thus securing the blade in the housing.

REFERENCES:
patent: 3622729 (1971-11-01), Ohno
patent: 3727015 (1973-04-01), Voland et al.
patent: 3823280 (1974-07-01), Obermann et al.
patent: 4032739 (1977-06-01), Micolaisen et al.
patent: 4734548 (1988-03-01), Cole

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