专利名称：Respirator speech transmitter发明人：Angell, Cyril Edward Nelson申请号：EP83304598.2申请日：19830809公开号：EP0101292A2公开日：19840222
专利附图：
摘要：A respirator speech transmitter has a projecting tube (40) with a one-way valve(44) at one end and the other end being covered by a baffle (50) having an inner skirt (49)extending around the tube (40). An outer skirt (34) extends from the tube to surroundthe inner skirt (49) so that a convoluted passageway which increases in width as it extends
from the tube (40) formed between the outer surface (48) of the tube (40), the innerskirt (49) and the outer skirt (34). This convoluted passageway has excellent acousticproperties yet prevents ingress of contaminants. In a modification the valve is at the sameend of the tube as sthe baffle.
申请人：AVON INDUSTRIAL POLYMERS LIMITED
地址：Bath Road Melksham Wiltshire SN12 8AA GB
国籍：GB
代理机构：Harrison, David Christopher
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