Device for protecting ears from noise

摘要: 860,029. Ear protectors. MINE SAFETY APPLIANCES CO. Oct. 6, 1958, No. 31823/58. Class 81 (2). protectors comprise a pair of cups 10, each having laterally-projecting bead 11, Fig. 3, around which is hooked the peripheral rear flange 13 ring 12 extending partway across cup opening, tubular, annular cushion 15 fitted with sound-absorbing material, e.g. glycerine, being held in engagement by means flexible skirt 16, integral or joined to circumference cushion, extends back and then forward between 11 finally inward 10. The preferably made rigid plastics material only sufficient flexibility enable it be pulled off snapped over its inner portion more than 13. are nearly filled such as foam sponge rubber. ear mounted inverted U-shaped yokes 7 bolted at 6 head-band 1, 2 adjustable width. Specification 860,030 referred to.