Patent GB-771990-A (GB)
Title: Atomizer
IPC: F24F6/06
Filed: 1955-06-09
Abstract: 771,990. Spray-producers. DEFENSOR AKT.-GES. June 9, 1955 [April 15, 1955], No. 16576/55. Class 69 (3). An atomizer of the type comprising a motordriven rotary member within a casing for producing an air current and for throwing liquid against baffles which surround and are spaced from the rotary member, and in which the atomized liquid is carried away by the air current, includes sound-absorbing material within the casing for dampening noise from the atomizer and for eliminating, by deflection, the larger particles from the air stream. Liquid is contained in the part 11 of an outer casing, the other part 12 of which is mounted on an annular frame 15 supported by tubular legs 16 resting on feet 17 of sound-absorbing material. An electric motor 34 mounted in an inner casing 31, 32 drives a blower 50 and a rotary member 53- 57. A two-part casing with matched flanges 38, 39 surrounds the motor and is resiliently supported on the casing part 31 by bolts 40 and resilient rings 42, 43. A gasket 45 seals the lower part of the inner casing, and a hub 51 of resilient sound-absorbing material is arranged between the motor drive-shaft and the rotary member. The latter comprises a conical part 53 with a suction cone 54 dipping into the liquid, and a closely-adjacent conical part 55 with fan vanes 56 and a collar 57. A cup 60 surrounds the cone 54 and has liquid openings 61 in its wall and radial ribs on its bottom. An atomizer rim 65 surrounds the rotary member and is secured to the frame 15 by resilient members 66 of sound-absorbing material. The rim consists of outwardly pressed lugs 67 and openings 68 therebetween and may be of sound absorbing material or of sheet metal with a covering of such material. A sleeve 69, 70 of similar material provides a further baffle. The parts 11 and 12 of the outer casing are detachably connected by spring-urged latch members 93 which engage with the rim of the part 11. Each member 93 forms part of a pin 91 which slides within a nut 90 and is urged outwardly. by a spring 94. Each nut 90 engages a bolt 33 which interconnects the inner and outer casings. In operation, liquid is drawn up the cone 54 and thrown off the edge of the cone 53 and strikes the baffles 65, 69. Liquid flowing up the outside of the cone 54 is thrown off the collar 57, strikes the cup 60 and is returned to the supply. Air is drawn into the apparatus between the parts 11 and 12 and flows downwardly past an air filter 21 in the form of a circular brush, and then passes between the parts 12 and 31 and from the apparatus, carrying with it the smaller liquid particles. The liquid carrying air stream strikes an annular baffle 76 of soundabsorbing material and any larger particles are collected in a trough 71 and fed back to the supply through the legs 16. Guide vanes 79 of sound-absorbing material and an electric heater 99 are provided in the outlet path 75. A handle 81 includes trunnions 82 engaging the casing 31, and its walls are shaped to hold the parts 32 and 12 in their relative positions. In the modification of Fig. 2, the motor shaft 35a is hollow and a rod 101 passing therethrough carries a valve 102 of resilient material which, in its lowermost position, prevents liquid flowing up the cone 54 of the rotary atomizing member. In its uppermost position the valve seals the space in the shaft 35a and allows spraying to take place. An armature 105 is provided at the top of the rod 101 and the valve is opened by an electromagnet 106 controlled by a multi-way switch 111. The switch also controls the heater 99, not shown, and has a number of positions providing for different degrees of heating of the mist stream or, when the valve 102 is closed, the air stream from the apparatus.