Patent GB-191216545-A (GB)
Title: Improvements in Automatic Lamp-lighting and Extinguishing Devices.
Inventor: BROENDUM MAGNUS VILHELM
IPC: F23Q9/02
Filed: 1912-07-15
Granted: 1913-01-23
Abstract: 16,545. Brondum, M. V. July 15. Actuating; valves controlled from a distance. -Relates to clockwork-operated devices, with alternative hand operation, for lighting and extinguishing a number of gas or electric lamps at predetermined times, provision also being made for premature lighting or extinguishing- in the case of gas lamps by temporary variations of the gas pressure, and in the case of electric lamps by electrically-operated releasing- mechanism. The central feature of the device consists of a vertically-sliding bar 14 operated by means of tappets 7, 8 on adjustable arms 5, 6 rotating with a time dial 3 and acting through lighting and extinguishing levers 10, 11. The bar 14 is raised in one movement to open all the valves 56, 57, but is lowered by two operations of the clock-work for extinguishing half the lights some time in advance of the remainder. Prior to and in preparation for the lighting operation, the lighting-lever 10 is depressed by its tappet 7 and retained by the engagement of its free end with a weighted catch 12, a laterally-springy arm 20 on the same shaft 18 moving so as to engage the part 21 under the shoulder 31 of the push-bar 14. When the catch 12 is subsequently released by the lighting- tappet 7, or alternatively by increase of the gas pressure acting through the diaphragm 40, tube 44, rod and lever 49, 51, the lever 10 and arm 20 are moved upwards by the spring 19 whereby the bar 14 together with the rod 41, disk 42. diaphragm 40 and the valves 56, 57 are lifted and the gas turned on. The lower end of the bar 14 is moved to the right by the action of a stud 16 on the cam-shaped part of a slot 15, whereby a lug 32 on the bar 14 becomes disposed right over a tapered lug 22 on the arm 20. At the half-light time, the half-light stud 9 on the time dial 3 engages the extinguishing-lever 11 and turns an arm 25 mounted on the same shaft 23 to the left; in so doing, a bevelled edge 26 of the arm 25 co-acts with the inclined part of the lug 22 and bends the spring arm 20 laterally to release the parts 21, 31; the bar 14 however remains supported by the engagement of a lug 30 on the arm 25 under a lug 34 on the bar. Subsequently, when half-light stud 9 releases the lever 11, the arm 25 is moved to the right by the spring 24 whereupon the bar 14 drops but is caught half way by the tapered lug 22 which engages under lug 32. The valve 56 is thus closed to turn out half the lights. The remaining lights are turned out subsequently when the extinguishing-tappet 8 engages lever 11 which turns the arm 25 to the left again causing the lug 29 to push against lug 33 and displace the bar 14 to the left. This action disengages the lugs 32, 22; simultaneously the lug 30 engages between the lugs 34, 35 whereby the bar 14 is kept supported. When the lever 11 is finally released from the tappet 8, the movement of arm 25 to the right releases the bar 14, which drops and allows the other valve 57 to close and turn out all the lights. The conduits 63, 64 may supply different burners in the same lamps, or different lamps, and the apparatus can be adapted for turning all the lights out simultaneously. The independent hand-operated device comprises a lever 67 which raises and lowers the bar 14 by means of a pin 16. The lift valves 56, 57 can be replaced by plug cocks or, in the case of electric lamps, by switch levers, and the diaphragm by an electrically-operated releasing-mechanism for operating the catch 12.