Abstract:
A dual chamber inflatable safety tire mounted on a rim, said tire having an outer tire with an inner tire disposed within the outer tire forming an outer chamber and inner chamber, a one way valve means extending through the inner tire to enable air flow from the outer chamber to the inner chamber, a first inflation and deflation valve means extending through the apparatus into the outer chamber, and a second inflation and deflation valve means extended through the apparatus into the inner chamber.
Abstract:
The message on this electric sign can be quickly changed from one message to another letter-by-letter by removing a conductor bridge bar from the sign lamp circuit block illuminating the lamp forming the first letter and substituting another conductor bridge bar for illuminating the necessary lamps for the new first letter and so on similarly for each letter of each word. Each letter of the alphabet has a different bridge bar according to the lamps required to outline that letter in its lamp circuit block, and a word in the sign is made up of a combination of lamp circuit blocks employing a different bridge bar for each different letter of the word. Each lamp employed for outlining the letters is a special lamp of the type disclosed and claimed in my copending application Ser. No. 730,407 filed May 20, 1968 for Dual Voltage Automatic-Switching Electric Lamp, now U.S. Pat. No. 3,524,100. The filament of this special lamp is initially energized by a starting voltage and automatically shifted over to an operating voltage by a thermostatic switch contained within the lamp bulb and responsive to the heat emitted by the filament. The instant the operating circuit is interrupted, the cooling of the filament causes the thermostatic switch within each lamp to shift back to its starting voltage contact ready to be reenergized by the next closing of the circuit thereof, as by the substitution of another bridge bar. The use of this lamp in the present sign circuit eliminates many relays and controllers required in prior sign circuits. The sign itself contains as many blocks of lamps as are necessary to form the desired message with the maximum number of letters, e.g. a 50-letter message would require 50 blocks of lamps with 50 bridge bars or other selective bulb-group-energizing switches or controllers, spacing between words on the same line being accomplished by energized blocks spaced by unenergized blocks.
Abstract:
A safety tire is provided having an outer tire with treads and a puncture resistant inner tire defining inner and outer chambers, a first inflation/deflation valve extending through the sidewall of the outer tire into the outer chamber, a one-way valve to enable air flow from the outer chamber to the inner chamber, and a second inflation/deflation valve extending through the rim of the tire into the inner chamber.