Patent GB-800939-A (GB)
Title: Improvements in or relating to gas-operated lighters
IPC: F23Q2/52
Filed: 1955-07-18
Abstract: 800,939. Liquified gas lighters. ETABLISSEMENTS GENOUD & CIE. July 18, 1955 [July 17, 1954; April 7, 1955], No. 20789/55. Classes 75(1) and 75(3) In a liquified gas lighter the vapour given off by a wick or like absorbent member is subjected to a pressure drop due to its passage through a member disposed in front of and adjacent to a closure member and to a second pressure drop due to its passage through a second member disposed after the closure member and before the burner. The outlet valve of the lighter has a sleeve 1 mounted within the liquified gas reservoir 2 and into the sleeve 1 is screwed a further sleeve 3 which projects at its lower end 3a through an aperture 1b in the sleeve 1. Within the sleeve 3 is located an inverted cup-shaped member 4 held in position by a screwed member 5 pressing on the cup 4 through the intermediary of a seating ring 6. A tube 7 closed at its upper end carries a wick 8 which projects through radial ducts 7b in the tube 7 wall. The tube 7 is mounted within the cup 4 and at its spigot upper end 7a is located with clearance in an aperture 4b in the end of the cup 4. An annular filtering member 10 of flexible cellular material is held between the spigot upper end 7a of the tube 7 and a shoulder 4a on the cup 4. A burner tube 11 slidably mounted in the sleeve 5 and upwardly biased by a spring 13 against a sealing ring 14 has an axial duct 11a leading to a cavity 11b at its lower end, the walls of which cavity 11b are provided with lateral orifices 11c. The cavity 11b accommodates one or more filtering discs 9 and a sealing disc 12 which disc 12 normally covers the aperture 4b in the cup 4. To operate the lighter the operator's finger first rotates a flint wheel 39 and then presses a finger piece 38 of a lever 35, pivoted about a pin 36 mounted in bosses formed on a flint tube 37, against the action of a spring 42 thereby raising the lever end 17 to permit the spring 13 to lift the burner tube 11 and allow gas to flow to the burner. The gas passes from the end of the wick 8 between an annular passage between the tube 7 and the cup 4, through the pressure reducing filtering member 10, to the annular space between the spigot upper end 7a of the tube 7 and the aperture 4b and then through the orifices 11c and the further pressure reducing filtering discs 9 to the burner through the duct 11a. The lighter head is covered by a cap 45 suitably apertured to accommodate the burner 11, filing wheel 39 and finger piece. 38 and held in position by detents 48, Fig: 4, in the sides thereof engaging apertures 47 formed in wings 46a of a member 46 attached to the top of the reservoir 2. The reservoir 2 is filled from a liquid-gas cartridge, after removal of a plug 32, Fig. 3, screwed on to or into a sleeve 21 of a valve attached to the bottom of the reservoir. When the cartridge is screwed into the sleeve 21, a sleeve 26 is moved and compresses a spring 30 against a washer 31 and a sealing ring 29 which ring 29 expands inwardly to bear against the sleeve 26. A plunger 27 is also moved so that its head 27a is lifted off a sealing ring 28 to allow filling of the reservoir 2 from the cartridge via a transverse slot 27c in the head of the plunger 27, an annular passage between the sleeve 26 and the plunger 27 and finally through an orifice 22b in a member 22.