Abstract:
An efficient method of preparing a coating preparation for use in a single step coating of primer for percussion-ignitable flash lamps, providing a combination of efficiency and safety in handling during manufacture. A production quantity of an aqueous mixture is prepared, containing the fuel, the metallic combustible, and the binder, but without the oxidizer. The production quantity is then divided into at least three fuel containing batches each of which contains less 40 grams of dry ingredients. An aqueous mixture comprising the oxidizer is prepared and at least a portion of this aqueous mixture comprising the oxidizer is added to the fuel containing batch one of the fractions of the production quantity. In this manner most of the ingredients are prepared in large production quantities but the danger of having serious accidents from accidental reactions involving the large production quantity is avoided. Preferably the oxidizer is sodium chlorate.
Abstract:
A reliable and inexpensive ignitor for rapidly ''''firing'''' the combustible gas-producing charge of an inflatable-cushion type safety apparatus for motor vehicles. The ignitor preferably comprises a modified AG 1/2 photoflash lamp assembly which has an open-ended glass tube instead of the sealed glass envelope normally employed and is devoid of shredded foil. The open end of the tube is sealed by a plastic diaphragm which ruptures when a predetermined amount of primer inside the tube is ignited by passing electric current through a wire filament that is embedded within the primer.
Abstract:
A light source, such as biplane tungsten filament, is suspended within a compact halogen-containing lamp by an elongated mount assembly that is anchored in one end of the lamp envelope. The mount assembly has resilient wire supports that hold the planar filament at a predetermined location within the envelope and the relative dimensions of the planar filament and envelope are such that the inner surfaces of the envelope walls are heated to the temperature required to maintain the halogen-tungsten cycle when the lamp is operated.
Abstract:
An incandescible projection lamp combination which utilizes a vitreous borosilicate glass, light transmitting envelope. The lamp utilizes a tungsten filament and a bromine containing atmosphere. The power loading is about 13.6 to 16.4 watts per cubic centimeter of lamp volume, whereby light output is essentially constant throughout life.
Abstract:
A projection lamp for use in a motion picture projection system. The lamp comprises a primary incandescible filament one end of which is electrically connected to a lamp lead-in, a first ballast filament one end of which is electrically connected to a lamp lead-in, with the other ends of these filaments being electrically connected. The improvement comprises disposing within the lamp a second ballast filament one end of which is serially electrically connected to the primary incandescible filament and the first ballast filament, and the other end is connected to an individual lead-in. The second ballast filament is thus adapted to be connected as part of the series load with the operating potential applied thereacross to cause the primary filament to incandesce with a low level of intensity to permit an individual film frame to be viewed.