초록 ▼

A smoke mask includes a generally planar breathing filter sized to cover the nose and mouth of a user. The breathing filter may be either dry or moistened, and has a filter efficiency of at least about 95%, meaning that at least about 95% of charge neutralized particles having an approximate size of

A smoke mask includes a generally planar breathing filter sized to cover the nose and mouth of a user. The breathing filter may be either dry or moistened, and has a filter efficiency of at least about 95%, meaning that at least about 95% of charge neutralized particles having an approximate size of 0.3 micrometers are removed from air flowing at a rate in a range of about 81 liters per minute to about 89 liters per minute, with a total filter load of at least about 200 milligrams of the particles. A transparent eye shield, which may be either a plastic film or goggles, is attached to the breathing filter. Pressure sensitive adhesive is located on the peripheral edge of one surface of the mask structure for securing the mask to the face of the user.

대표청구항 ▼

A smoke mask includes a generally planar breathing filter sized to cover the nose and mouth of a user. The breathing filter may be either dry or moistened, and has a filter efficiency of at least about 95%, meaning that at least about 95% of charge neutralized particles having an approximate size of

A smoke mask includes a generally planar breathing filter sized to cover the nose and mouth of a user. The breathing filter may be either dry or moistened, and has a filter efficiency of at least about 95%, meaning that at least about 95% of charge neutralized particles having an approximate size of 0.3 micrometers are removed from air flowing at a rate in a range of about 81 liters per minute to about 89 liters per minute, with a total filter load of at least about 200 milligrams of the particles. A transparent eye shield, which may be either a plastic film or goggles, is attached to the breathing filter. Pressure sensitive adhesive is located on the peripheral edge of one surface of the mask structure for securing the mask to the face of the user. uencies, respectively, said first and second frequencies being different, said first and second spectral components having first and second reference amplitudes, said encoded signal complex having adjusted amplitudes of said first and second spectral components in accordance with said first and second data items, respectively, said apparatus including: means for interpolating a time domain representation of said encoded signal complex in accordance with a desired expansion ratio; means for converting the time domain representation to a frequency domain representation of said encoded signal complex, said frequency domain representation of said encoded signal complex including at least said adjusted first and second spectral components; means for extracting said first spectral component from said encoded signal complex; means for retrieving said first data item in accordance with said adjusted first reference amplitude of said extracted first spectral component of said encoded signal complex means for extracting said second spectral component from said encoded signal complex; and means for retrieving said second data item in accordance with said adjusted second reference amplitude of said extracted second spectral component of said encoded signal complex. 12. An apparatus according to claim 11, wherein said means for interpolating and converting said time domain representation together comprise an FFT. 13. An apparatus as defined in claim 11, wherein said reference signal complex further includes at least third and fourth spectral components having third and fourth frequencies, respectively, said third and fourth frequen