Signals and indicators – Bells – Gong type
Patent
1977-08-15
1978-11-07
Swisher, S. Clement
Signals and indicators
Bells
Gong type
116DIG8, 116DIG9, 343 18B, 422239, B64B 150
Patent
active
041239873
ABSTRACT:
A compact signal balloon device includes a special charge container having a liner for holding a first reacting chemical and preventing its egress through access holes provided in a wall of the charge container. The device also includes an activation container which holds a second reacting chemical and which is adapted to receive the charge container to effect mixing and reaction of the chemicals to produce a lighter-than-air gas. A balloon seals the activation container and is inflated by the gas generated by the reaction. The balloon is then sealed and detached and then released on the end of a line. A detachable covering member over the access holes seals the holes and prevents inadvertent reacting prior to the time that the charge container is placed in the activation container. A piece of reflective metallic material is carried by the balloon and increases its detectability. Also, a transmitter may be attached to the balloon to transmit its location.
REFERENCES:
patent: 1017495 (1912-02-01), Bellamy
patent: 2334211 (1943-11-01), Miller
patent: 2395006 (1946-02-01), Leslie
patent: 2463862 (1949-03-01), Gibadlo
patent: 2463863 (1949-03-01), Gibadlo
patent: 2636019 (1953-07-01), Chetlan
patent: 2758203 (1956-08-01), Harris
patent: 2923917 (1960-02-01), McPherson et al.
patent: 3941079 (1976-03-01), McNeil
Military Specification MIL-C-1135C(EL); Dec. 7, 1962.
An article "Calcium Hydride" distributed by Metal Hydrides Incorporated; of Beverly, Mass.
"Metal Hydrides for Hydrogen Generation" leaflet of Ventron Corp., Chemicals Division; Congress Street, Beverly, Mass.
Denman Gail M.
Singerle Richard C.
Corr Denis E.
Res-Q-Devices, Inc.
Swisher S. Clement
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