Patent GB-191314757-A (GB)
Title: Improvements in Automatic Gas Lighters.
Filed: 1913-06-26
Granted: 1914-06-26
Abstract: 14,757. Gas - Z³nder Ges. vorm. Deutsche Z³nder-Werke. June 26, 1912, [Convention date]. Lighting burners by frictional devices; pilot jets.-Relates to devices in which an operating- member actuates a gas valve and also releases a spring-actuated friction wheel, which is then rapidly rotated in contact with the pyrophoric material. A pyrophoric pin, carried by a sleeve 7 and engaged by a friction wheel 6, is connected to the operating-lever 15 by intermediate disks 10, 34. The lever 15 and the disks 6, 10. 34 are loosely mounted on the pin 3, on which the valve 1 turns. The disk 10, which is engaged by a pawl 14 on the lever 15, has a pin 35 engaging a recess in the disk 34. This has a pawl 9 formed by radially cutting and bending the disk, and engages ratchet teeth on the face of the friction wheel. At the lowest position of the lever 15, the pawl 14 is disengaged by the pin 18, and the disk 10 is rapidly rotated by a spring 12, carrying with it the disk 34 and the friction wheel. The resulting spark ignites the gas issuing from an auxiliary pilot jet 26<1> rotating with the valve 1, and the lever 15 is held down until the jet 26<1> ignites the main jet 26 and the burner. The Specification as published under Section 91 (3) (a) comprises also the following modifications: (1) A single by-pass 26, Fig. 2 (Caned.), is supplied through a passage 25, and is of thin material, which can be bent into the desired position. The friction wheel 6 is operated through an intermediate disk 10, on which is pivoted a pawl 9 engaging ratchet teeth 8 on the friction wheel. The disk 10 is engaged by the pawl 14 on the lever 15, the pawl being released by the pin 18 at the lowest position of the lever. (2) In place of the pin 18 is a projection 18<1> on the bracket 29, Fig. 6 (Caned.), and the spring 16 which controls the lever 15 engages the projections 18<1>, 33. (3) The intermediate disk 10, Figs. 14 and 16 (Cancd.), has two tongues 9<1>, 14<1>, bent in opposite directions, and two ears 19<1>, 40, the ear 19<1> being normally held by the spring 12 against the projection 18<1>. When the lever 15 is operated, it engages the tongue 14<1> and turns the disk 10 until the tongue is released by the projection 18<1>, when the disk 10 and the lever 15 are returned by the spring 12 into the position shown in Fig. 16 (Cancd.), and the disk 10 operates the friction wheel by means of the tongue 9<1>. (4) The operating-lever 15 engages the edge of a cap 41, Fig. 18 (Cancd.), rigidly secured to the pin 3, and the spring 16 engages at one end with an ear 46 on the disk 20 of the operating- lever, and at the other end with the projection 18'. (5) Figs. 20 and 21 (Cancd.) show an arrangement for upright burners. A spring 12', connecting the lever 15 directly with the friction wheel 6, is hung over a shoulder 47 on the friction wheel. This shoulder has a nose 43 engaged by a spring pawl 44 on a projection on the pyrophoric-pin holder 7. When the lever 15 is operated, a pin 42 engages and releases the pawl 44 and allows the friction wheel to rotate. When the closing-lever 4 is operated, a projection 49 inside the cap 41 returns the friction wheel. The shoulder 47 may be replaced by a dished intermediate disk 10, Fig. 23 (Cancd.), having a tongue 9<1> engaging the friction wheel. (6) The lever 15 and the friction wheel are returned by separate springs 50, 12, Fig. 26 (Cancd.), and the intermediate disk 10 is engaged by a pawl 44 until this is released by a projection 52 on the closing-lever 4, which is operated from the lever 15 by the edge of a flange on the disk 20. (7) Fig. 28 (Caned.) shows an arrangement applicable to acetylene burners, the igniter being carried by a sleeve 55 fitted over the burner, and operated by a lever 15 unconnected with the gas cock. The pyrophoric-pin in the sleeve 7 is adjusted by a screw passing through the end of an anglebar 58, the other end of which is displaced on a fixed pin 59 against the action of a spring 60. (8) It is stated that the intermediate disk may have other forms, such as a lever; and that the intermediate by-pass 26<1> may be replaced by a fine bore in the valve. This subject-matter does not appear in the Specification as accepted.