Strain-relief member for reducing torsional strains in line cord

Details Strain-relief member for reducing torsional strains in line cord Strain-relief member for reducing torsional strains in line cord

1979-06-11

1981-03-10

McQuade, John

Geometrical instruments

339101, H01R 1356

Patent

active

042550068

ABSTRACT:
A strain-relief member is provided to relieve torsional strains from a two-conductor power supply cord attached to a personal care electrical appliance, such as a hand-held hair dryer, or curling iron. It is molded to the insulation of the two-conductor electrical power supply cord. Such torsional strains are primarily those resulting from twisting the wire about its longitudinal axis, as when using a curling iron, rather than from flexing.
The strain-relief member is an elongated body member of elastomeric material molded with the usual two-conductor line cord. It has a lateral projection or collar on one end thereof adapted to fit into the interior of the personal care electrical appliance to prevent rotation with respect to the appliance. The outer portion of the body member is uniformly tapered along its length on the sides adjacent to single conductors of said cord and has flattened, generally parallel sides extending along the opposite sides which are adjacent to both conductors of the power supply cord. The strain-relief member is made of elastomeric material of softness such that torsional stress is substantially uniformly distributed along the length of the member.

REFERENCES:
patent: 2171331 (1939-08-01), Folsom, Jr.
patent: 3497608 (1970-02-01), Elliott et al.

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