Abstract: Explosive fumes in the lower portion of a power boat are detected by providing a manually collapsible elastomeric bulb, forming a one-way pump, adjacent a remote station on the boat, the bulb having its inlet remotely connected by a long inlet tube to a lower portion of the boat hull where such fumes normally collect. The outlet of the bulb is connected to a nose mask having an orifice therein to increase the velocity of air passing into the mask. By placing the mask over a person's nose and successively and quickly collapsing the bulb, high velocity bursts of air are directed into the person's nose so that he may readily detect any fumes.

Abstract: The present exercising device includes a swivel platform and hand-held control cords which may be operated through a pulley assembly. The swivel platform is made up of a large diameter circular platform rotatably mounted on an equal diameter circular base. The base is similar in shape to an oversized ping pong paddle with a circular head portion and an extending member corresponding to the handle of the paddle. The hand-held cords are connected either directly to the end of the extending member of the base or to pulleys secured to the extending member, to provide balance and coordinated rotation of the swivel platform. When pulleys are used, the two hand-held cords are each run through one of the two pulleys, and then connected to each side of the swivel platform. Each cord may be attached to one of two arms extending laterally from the swivel platform, or to the eyebolts connected to opposite sides of the platform. The cords can be adjusted to fit persons of all sizes.