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US 3,986,409 AGranted
Push-to-engage device
AssigneeRaytheon Company
InventorsWilliam V. Tripp, Robert H. Broadbent
Life of this patent
Estimating the term…
Abstract
A push-to-engage device comprising a hollow knob having axially disposed therein an independent bushing provided with a fastener for bindingly engaging an inserted end portion of a rotatable shaft and with a plurality of recesses disposed for engagement with keys protruding inwardly from the knob, and an external resilient device coupled to the knob for positioning the keys in spaced relationship with the recesses in the bushing.
Claims8
A control knob assembly for rotatably engaging an adjustment shaft and comprising:
- a hollow body including a cup-shaped housing and a retaining washer fitted into the open end thereof, the washer having centrally disposed aperture means for permitting insertion of the shaft axially into the housing and the housing having first interlocking means for rotating the shaft;
- an independent coupler device disposed within the body, the coupler having fastening means for bindingly engaging the shaft and second interlocking means for releasable engagement with the first interlocking means;
- and
- resilient means external of the body and coupled thereto for resiliently positioning the first interlocking means in spaced relationship with the second interlocking means.
1 more element
In combination:
- a rotatable shaft having a distal end portion;
- rotation resisting means coupled to the shaft for applying a frictional drag thereto;
- knob means mounted on the distal end portion of the shaft, the knob means including coupling means for rotatably engaging the shaft in a releasable manner and including a hollow body having therein a protrusion fixedly attached to the body;
- and
- resilient means mounted on an intermediate portion of the shaft between the rotation resisting means and the knob means for maintaining the knob means in a released condition with respect to the shaft.
2 more elements
Dependencies are inferred from the claim text.