Patent GB-190810715-A (GB)
Title: Improvements in and relating to Automatic Igniters and Light Extinguishers.
Inventor: BROENDUM MAGNUS WILHELM
Filed: 1908-05-16
Granted: 1908-12-17
Abstract: 10,715. Brondum, M. W. May 16. Lighting and extinguishing g a s.- Clock - work mechanism for turning gas cocks; electric switches, &c. on and off at predetermined times is supplemented by an eccentric which makes one revolution per annum and daily varies the position of the actuating-arms according to the season of the year, the actuating - mechanism being adjustable to equalize the differences be: tween the local and the solar time of place. An indicator hand 4, corresponding to the minute - hand of a clock, makes one revolution per hour over a fixed dial 41, whereon the Roman numerals indicate the hours of the day and the Arabic numerals the hours of the night. The hours are indicated by a hand 44 fixed to a dial 9 which completes one revolution every 24 hours. Behind the dial 9, and secured thereto by a screw 11, is a loosely mounted disk 10, carrying a wheel 17 which is connected by gearing 15, 16 with a wheel 13 carrying an eccentric 12. Engaging with the periphery of the eccentric are the bent ends 25, 26 of two reciprocating slides 21, 22, which are provided with fixed:or adjustable extensions 27, 28 and are guided by pins 23, 24 mounted on the disk 10. Pins 33, 34, adjustably mounted in slots in the arms 29, 30, bear against the extensions 27, 28, and the arms 29, 30 are formed with adjustable extensions 35, 36, which at the predetermined times engage with a projection 39 on the rocking lever 43. This lever releases in the known manner a spring, which operates the gas cock, electric switch, or equivalent device. Once every twentyfour hours a pallet-wheel 18 on the shaft of the wheel 17 engages a fixed pin 20 and is turned through 90 degrees, so that, through the calculated gearing 16, 15, 13, the eccentric 12 is turned once relatively to the disk 10, to impart through the slides 21, 22 and the pins 33, 34 to the actuating- arms 29,30 the adjustment necessary to correspond with the variations of the season. The adjustment necessary to compensate for the differences between local and solar time is effected by loosening the screw 11 and moving the free disk 10 and the entire release mechanism forwards or backwards relatively to the dial 9. More exact adjustments to meet local requirements may be made by loosening the screws 37, 38 and moving the extensions 35, 36 forwards or backwards. The adjustment of the pins 33, 34 in the slots 31, 32 compensates for the different lengths of the day at places having different latitudes. The pins are moved inwardly in northern, and outwards in southern latitudes, the slots being curved to correspond with the general greater length of twilight in the northern latitudes. The shaft 14 is elongated and squared so that it can be operated by a special key to adjust the apparatus according to the season in which it is started. The device may be set to ignite at different times but to extinguish at a fixed hour ; or in lamps with several burners all the burners may be lit at the same time and extinguished at different times.