1977-07-18
1979-02-13
Cooper, William C.
179178, H04M 105
Patent
active
041397436
ABSTRACT:
A headset having an ear cup with a beveled spherical socket hole which rotatably supports and seats a spherical boom support swivel. The swivel consists of two half ball elements held in registration on an asymmetrical boom through gripping action of an asymmetrical hole in each of the half ball elements. Opposing ramp projections and sockets in the half ball elements bias the half ball elements in opposing rotational motion about the boom axis when the half balls are urged toward each other by a floating spring retainer plate thus producing a torque on the boom which is tightly gripped by the opposing half ball elements. Opposing outward projections on the boom mate with depressions in the half ball elements to prevent longitudinal sliding of the boom opposite the swivel and adjacent the operator's mouth. The swivel is rotatably held in the beveled spherical socket hole by the floating spring retainer plate having a flanged dish forming a ball seat swivel. Screws fastening the floating spring retainer plate to the ear cup adjust the degree of force on the swivel against the socket hole. A stop in the ear cup acting in conjunction with stops on the half ball elements limit travel of the boom to less than 360.degree.. An outward circular projection on each element of the swivel provides additional support for the swivel to prevent gouging of the ear cup by the boom.
Cooper William C.
Jaeger Hugh D.
Sturm Warren A.
Telex Communications, Inc.
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