Arrangement for providing a series of illuminations

Claim 2

In an arrangement for producing a series of illuminations comprising, in combination, a plurality of consecutive photoflash units, each including in series fuse means and a photoflash bulb having a high internal resistance before, and a low internal resistance after flashing, said fuse means opening when the corresponding bulb flashes; and circuit means connecting the photoflash bulb of each subsequent photoflash unit in parallel with the fuse means of the preceding unit, and connecting said fuse means of all said units in series with each other.

Claim 3

In an arrangement as defined in claim 1, further comprising current source means, one pole of which is connected directly to the junction point between the fuse means and the photoflash bulb forming the last unit in the series, and the other pole of which is connectable to the photoflash bulb forming part of the first unit in the series at its terminal remote from the junction point between the latter photoflash bulb and its associated series fuse means.

Claim 4

In an arrangement as defined in claim 1, wherein the photoflash bulbs of said units are connected in series.

Claim 5

In an arrangement as defined in claim 3, wherein the fuses of all said units but the last are connected in series.

Claim 6

In an arrangement as defined in claim 1, including a test circuit for determining whether there are any unused photoflash bulbs, and a switch for connecting said test circuit to the last of said photoflash units.

Claim 7

In an arrangement as defined in claim 1, wherein said fuse means is an integral part of each said photoflash bulb.

Claim 8

In an arrangement as defined in claim 1, wherein each said fuse means is located in the immediate vicinity of a respective said photoflash bulb, so that the heat of the bulb melts and Opens the respective fuse means.

Claim 9

In an arrangement as defined in claim 1, wherein said photoflash units form an integral structure.

Claim 10

In an arrangement for producing a series of illuminations, in combination, a plurality of consecutive photoflash units, each including in series fuse means and a photoflash bulb having a high internal resistance before, and a low internal resistance after flashing, said fuse means opening when the corresponding said bulb flashes; circuit means connecting at least the photoflash bulb of each subsequent photoflash unit in parallel with the fuse means of the preceding photoflash unit; a test circuit for determining whether there are any unused photoflash bulbs; and a switch for connecting said test circuit to the last of said photoflash units, said test circuit including a lamp connected to said fuse means of the last of said photoflash units to indicate, when said switch is closed, whether said fuse means is open or closed, and further including current source means for energizing said lamp.

Claim 11

In an arrangement for producing a series of illuminations, in combination, a plurality of consecutive photoflash units, each including in series fuse means and a photoflash bulb having a high internal resistance before, and a low internal resistance after flashing, said fuse means opening when the corresponding said bulb flashes; circuit means connecting at least the photoflash bulb of each subsequent photoflash unit in parallel with the fuse means of the preceding photoflash unit; a test circuit for determining whether there are any unused photoflash bulbs; and a switch for connecting said test circuit to the last of said photoflash units, said test circuit including a lamp connected to said fuse means of the last of said photoflash units to indicate, when said switch is closed, whether said fuse means is open or closed, and further including current source means for energizing said lamp.

Claim 12

In an arrangement for producing a series of illuminations, in combination, a plurality of consecutive photoflash units, each including in series fuse means and a photoflash bulb having a high internal resistance before, and a low internal resistance after flashing, said fuse means opening when the corresponding said bulb flashes; circuit means connecting at least the photoflash bulb of each subsequent photoflash unit in parallel with the fuse means of the preceding photoflash unit; a test circuit for determining whether there are any unused photoflash bulbs; and a switch for connecting said test circuit to the last of said photoflash units including a source of electric current, and wherein the photoflash bulb of the last of said units has one side directly connected to one pole of said source.

Claim 13

In an arrangement for producing a series of illuminations, in combination, a plurality of consecutive photoflash units, each including in series fuse means and a photoflash bulb having a high internal resistance before, and a low internal resistance after flashing, said fuse means opening when the corresponding said bulb flashes; circuit means connecting at least the photoflash bulb of each subsequent photoflash unit in parallel with the fuse means of the preceding photoflash unit; a test circuit for determining whether there are any unused photoflash bulbs; and a switch for connecting said test circuit to the last of said photoflash units including a source of electric current, and wherein the photoflash bulb of the last of said units has one side directly connected to one pole of said source.