Patent GB-345958-A (GB)
Title: Improvements in liquid fuel burning apparatus
IPC: F23C99/00
Filed: 1929-10-21
Abstract: 345,958. Burner apparatus. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Williams Oil-O-Matic Heating Corporation; 1201, East Bell Street, Bloomington, Illinois, U.S.A.) Oct. 21, 1929, No. 31888. [Classes 75 (i) and 75 (iii).] Spray burners; liquid fuel supply.-In a liquid fuel burning apparatus the stator or support of an electric motor which drives the fan and fuel mixture and metering pumps is mounted so as to be tilted or partially rotated by the reaction produced by the energization of the motor and its movement is utilized to open the fuel valve and operate the burner ignition device. The liquid fuel burning apparatus shown comprises a casing 1 adjustably supported by a column 2 and carrying a fan 18 driven by an electric motor carried by a bracket 7 on the casing. The motor shaft 15 is directly connected to the fan shaft 16 which is extended through a housing 10 to operate a metering pump 21 and a fuel mixture pump 20 such as described in Specification 221,835, [Class 75 (i), Burners &c.]. The fuel passes to the metering pump through a valve casing 9 secured below the bracket 7. The motor casing 6 is mounted on trunnions 13 in bearings 14 on the bracket 7 and carries a weight 41. When the motor is started the casing 6 turns in the bearings 14 and a cam 42 on its underside operates a stem 46 against a spring 50a to open the valve 49. The valve casing contains a circular strainer and the stem 46 is fitted with a bellows stuffing-box. The mixture passes from the pump 21 through a pipe 25 to a pipe 26 terminating in the discharge nozzle 31a on which an air spiral 32 is mounted substantially as described in Specification 271,687, [Class 75 (i), Burners &c.]. The casing 1 terminates in a blower pipe 11 provided beyond the air spiral with an abutment 33 for deflecting the whirling air on to the conical jet of fuel issuing from the nozzle 31a. The pipe 26 carries two insulators 36 supporting electrodes 35 supplied with current from a transformer or other ignition device 12 mounted on the fan casing 5. The leads 38 from the ignition device pass through a removable cover 39 on the main casing 1. The fuel pipe 26 is connected to a chamber 40 into which the fuel drains when the pumps 20, 21 stop. When the pumps are again started the fuel in the chamber 39 is drawn into the pipe 26 by induction through a pipe 31 in the manner described in Specification 321,455, [Class 75 (i), Burners &c.]. To prevent noise the air is drawn into the mixing pump 20 from the fan casing through a port 82 in an I-sectioned baffle partition 80, a chamber 81 in the housing 10, communicating chambers formed by walls 78, 79 on each side of the partition 80, a hollow pin 86, and a passage 77a. A rotary valve having its stem rigidly secured to one motor trunnion 13 may be substituted for the fuel control valve shown. Lighting burners by electric devices.-The outer trunnion of the motor casing 6 carries an arm 51 movable between two adjustable posts 52, 53 and connected by a link 54 to a lever 55 arranged in a control box 8 secured to the bracket 7. The movement of the casing 6 on the motor being started depresses the lever 55, and a pivoted member 61 on the lever 55 engages and depresses a lever 56, thereby closing a mercury switch 63 in the ignition circuit. At the bottom of its movement the member 61 is tripped by a stop 62 to release the lever 56 which is raised slowly by a dashpot 58 to break the ignition circuit. The spark at the electrodes 35 may ignite either the fuel mixture directly or a pilot-jet fed through a gas valve 67 operated by the lever 56. The dashpot is fitted with an adjustable valve so that the period of sparking may be varied. Electrically controlling fuel and air supplies.- The motor circuit includes a room thermostat T, Fig. 1, a boiler control B and a stack safety switch S, which opens, should the burner fail to ignite or the flame fail after initial ignition.