Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of transparent electrically insulating material having a light-reflecting coating on its rear for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.

Abstract: Flash lamp lead-in wires are embedded in a circuit board and are in contact with circuit runs carried by the board. The end of one lead-in wire of at least one of the lamps extends from the circuit board and makes electrical contact against a sheet-like shield member. In a preferred method the lead-in wires of a lamp are driven through the circuit board by ultrasonic drivers offset from each other so as to drive against one lead-in wire closer to its end than is the other.

Abstract: A photoflash lamp array comprising a plastic housing containing flash lamps positioned over a circuit board carrying switching circuitry for sequentially firing the flash lamps. The circuit board is made of an electrically insulating material having a light-reflecting surface for reflecting light when the lamps are flashed. The front of the housing is provided with prisms to improve the distribution pattern of light when the lamps are flashed.

Abstract: A photoflash lamp array comprising a housing elongated vertically and containing elongated flash lamps lying horizontally and stacked vertically, the flash lamps having lead-in wires extending from ends thereof near the sides of the housing and connected to a circuit board located behind the lamps. A conductive sheet-like shield is positioned between the circuit board and the rear of the housing and is contoured to have side portions extending frontwardly and between the lamp ends and the sides of the housing. Electrically insulative flash indicator material is positioned on the front surface of the shield and extends along the inside surfaces of the shield's frontwardly extending portions so as to prevent the lamp's lead-in wires from becoming shorted against the shield.

Abstract: A lead-in seal of the type having a metal foil seal member sealed into an envelope, comprising a relatively narrow intermediate foil tab member connected between the foil seal member and a conductor. The result is reduced stress in the seal and less likelihood of cracking.

Abstract: A photoflash lamp array comprising a plurality of flash lamps having lead-in wires connected to a circuit board, and a reflector unit positioned between the lamps and the circuit board. The reflector unit is made of plastic having an electrically conductive reflecting coating on its front surface, and the reflector unit is shaped to provide openings so that the conductive coating is adjacent to or touching electrical ground areas of circuitry on the circuit board, whereby the reflector unit functions to dissipate electrostatic charges thus preventing accidental flashing of lamps.

Abstract: A flash lamp array having a plurality of flash lamps positioned over a side of a circuit board having thereon circuitry for sequentially flashing the lamps. A metal shield, in the form of a sheet of metal foil or foil-covered paper, is positioned adjacent to the other side of the circuit board and is in contact with a common electrical run on the circuit board by means of a staple through the circuit board. Strips of radiation-sensitive plastic are positioned between the shield and the circuit board to function as electrical insulation, and also function as flash indicators by distorting due to radiation from an adjacent flashing lamp.

Abstract: A sequencing flash array having flash lamps which are short-circuited across their lead-in wires after flashing. The lamps contain primer material at the bases of their bulbs and bridging across the inner ends of the lead-in wires. The primer material is a type having a low impedance after flashing, and the inner end regions of the lead-in wires are shaped to hold the flashed primer residue in place.

Abstract: A multiple flash lamp array having an electrically conductive reflector unit positioned between the flash lamps and a circuit board. A radiation-actuated last-flash indicator switch is positioned on the circuit board behind the last lamp to be flashed and is connected between an electrical ground circuit run and another circuit run. An opening is provided through the reflector at the last-to-flash lamp, in alignment with the last-flash indicator switch, and the rear edge of the opening is shaped to contact the electrical ground circuit run adjacent to the last-flash indicator switch for electrically grounding the reflector.

Abstract: A compact integral permanently assembled lamp unit comprising a fluorescent lamp, resistor ballast, starter means, and end connectors for connecting a plurality of lamps together.

Abstract: A multiple lamp photoflash array of the FlipFlash type having flash-sequencing circuitry for causing the lamps to flash one at a time in response to firing pulses applied to the array. A radiation switch associated with the last lamp to be flashed causes a short circuit across the array's electrical terminals when the last lamp is flashed and actuates a last-flash indicator in the camera.

Abstract: A photoflash lamp array comprising a plurality of flash lamps having lead-in wires connected to a circuit board, and a reflector unit positioned between the lamps and the circuit board. The reflector unit is made of plastic provided with an electrically conductive reflecting coating on its front surface, and is further provided with an integral tab member having a surface exposed to the front of the reflector unit, which surface is coated with said conductive coating, the tab being bent over so that its coated surface faces the circuit board and is in contact with an electrical ground area of the circuit board, whereby the conductive coating of the reflector unit is connected to electrical ground and functions to dissipate electrostatic charges thus preventing accidental flashing of lamps.