Telephone handset with transmitter having a one piece gasket for sealing and holding of transmitter members

Claim 1

A telephone handset having an elongate top part and an elongate lower part, each part of hollow concave form and adapted to fit together at their peripheries, said lower part housing a receiver and a transmitter, said lower part formed at one end to define a circular recess having a perforated base and a side wall extending upward from said base, and a transmitter assembly in said recess, said transmitter assembly comprising: a transmitter having a front face facing towards and in close proximity to said base, a cup-shaped member positioned on the back of the transmitter and including an outwardly projecting rim at a front end, and a resilient tubular member surrounding the transmitter and the lower part of the cup-shaped member, said tubular member including a first radially inward projecting rim at a forward end extending over the periphery of the front face of the transmitter and having a front face in contact with said perforated base, at least one projection extending upward from a top surface of said cup-shaped member, said top part of said handset in pressure contact with an upper end of said projection whereby said front face of said first radially inward projecting rim is in deformed acoustically sealing pressure contact between said front face of said transmitter and said perforated base, and a second radially inward extending rim at a rear end engaging over said outwardly projecting rim of the cup-shaped member, to retain said transmitter and said cup-shaped member together and acoustically sealing between said transmitter and said cup-shaped member.