Patent GB-705674-A (GB)
Title: Improvements in or relating to smokers' lighters
IPC: F23Q2/52
Filed: 1950-11-18
Abstract: 705,674. Friction lighters. RONSON PRODUCTS, Ltd. (Ronson Art Metal Works, Inc.). Feb. 15, 1952 [Nov. 18, 1950], No. 28258/50. Class 75 (3) A cigarette lighter is filled through a non- return valve, on a fuel chamber, with liquid fuel from a disposable receptacle and retains the fuel in liquid form within the chamber under conditions which make available a gas or vapour which issues through a wickless valve controlled orifice to atmosphere where it is ignited and burned. An internally screwed thimble 8, slotted at its upper end, is soldered to the lower wall of the fuel chamber 6 and carries a hollow piercing pin 12 held in position by an internally and externally threaded member 10. A disposable receptacle 1 has its upper end or a component member 3 thereof end sealed by a readily rupturable disc of lead, steel or tinplate 7 so that when the upper end of the receptacle is screwed into the member 10 the disc 7 is broken and the contents are discharged into the fuel chamber 6. A synthetic rubber sealing washer 16 normally held in position over the end of the piercing pin 12 by the pressure within the chamber 6 is lifted off its seating by the pressure of the liquid within the receptacle 1 to admit liquid fuel to the chamber 6. The receptacle 1 is made of metal or a synthetic resinous material and contains under pressure a liquid such as butane or propane and if required a small quantity of air or nitrogen. A natural or synthetic rubber pressure release plug 18 is fitted into a hole in the top wall of the fuel chamber 6 and a felt disc 19 is located in the chamber 6 immediately behind the plug 18 to prevent the absorbent material normally contained in the chamber from being forced out of the chamber 6 should the pressure therein blow out the plug 18. A plunger 26 provided with a synthetic rubber disc 23 at its lower end and normally held in the closed position by a snuffer cap 28 or a spring loaded ball 29 contained therein is lifted off its seating by the pressure of the gas or vapour within the chamber 6 when the cap 28 is raised to allow the gas or vapour to pass to atmosphere through an annular passage formed between the burner 27 and the plunger 26. A felt washer 53 in the lower end of the discharge valve 52, Fig. 3, prevents the absorbent material in the chamber 6 entering the valve. The chamber 6 may be detachably mounted on the lighter by means of a plug 35 screwed in the end of a flint tube 32a holding the chamber 6 against the underside of a top plate 30 carrying the lighter mechanism, 31. In an alternative construction the chamber 6 is formed by a tubular portion 37 and top and bottom plates 36, 38, secured together by soldering or brazing; the flint tube 39 being attached to the bottom plate 38 and provided with a clamping nut 39a at its upper end to prevent the gas pressure within the chamber 6 forcing the plates 36, 38 apart. The walls of the member 37 are prevented from bulging by a dumb-bell shaped member 54 soldered thereto. In an alternative form of construction, Fig. 3, the piercing member 46 is formed as a spring- loaded valve. Specification 683,734 is referred to.