US1765784A - Carpet dust cleaner - Google Patents

Description

June 24, 1930. o. ALDINGER 1,765,784

' y CARPET DUST CLEANER Filed Jan. 15. 192e .E- IN E3 'i ,35 tion and forming Pari"v thereof ia Carpet dust tric motor, a, fan and a filter mounted in said Patented v.lu-ne 24,1930 i i 1,765,784

UNITED I STATESv PATENT OFFICE OTTO ALDINGER, F STUTTGART, GERIIIIANY CARPET DUST CLEANER Application illed January 15, 1926, Serial No. 81,530, and in Germany September 2, 1924.

My invention relates to carpet dust cleanbracket o, and 1' is a threaded boss at the end ers, more especially of the type in which a of an arm secured to or integral with the motor driven fan enclosed in a casing exerts bracket g. A threaded rod c is secured in suction on the air .from which the dust is to the boss r at one end. Its other end is also 5 be extracted. v threaded and extends through the cover z' 55 It is an, object of my invention to protect where it is held by an insulating nut m. 4the person operating the dust cleaner against c is a filter or screen which is secured to electric shocks which may arise when coman annular projection s at one end and a ing in Contact with the metal casing, and to Washer t at the other end, this washer being reduce to a minimum the noise connected held on the rod by a nut u. A- frame c 60 with the operationof the apparatus. is guided on the rod at its centre andadapted When a dust cleaner having a metal casto be displaced by a nut lurso as to impart ing is opened for inspectionthe casingv may tension to the screen c. accidentally be in contact with a pole of `the The cover g at the opposite end of the electric system so that the person handling casing is hemispherical and perforated at c5 it maypreceive a shock which is particularly` f, f. A cap e with l a central opening d is dangerous if the cleaner is operated at a cominserted in the cover g. paratively high voltage, say 200volts. Air is drawn into the casing through a Another drawback of the metal casing is pipe a2 in the cover i and discharged through its sound reinforcing capacity, the casing the opening d in the cap and the perforations acting as a resonator forthe noise resulting f in the cover g. A g from the operation of the fan and the motor. It will be understood that the construc n These drawbacks are overcome according tion of the mechanical parts in the casing has to my invention by providing a casing of no bearing on the invention, the only feature suitable non-metallic and sound-deadening to be protected beingthe casing made of material. A material which has been found a non-conductive, sound deadening material. to be particularly suitable is cork composi- I Wish it to be understood 'that I do not tion. A Carpet dust Cleaner equipped With desire to be limited to the exact details of .a casing of this material not only affords costruction shown and described, for obvious complete protection against short-circuiting modifications will occur to-a person skilled in 9 and'shocks but also reduces the noise lto practhe art. tically nil as 'compared with a device of equal I c1aim; size but'eqllipp-ed With a metal CaSlIlg. Carpet dust cleaner comprising a casing In the dIaWlIlgS 'flXed t0 thlS SPeClC- orenvelope of cork composition and an elec#l cleaner embodying my invention is illustrated casing or enve10pe diagrammaticauy by Way 0f example- In testimony whereof I affix my signature.

Referring to the drawings h is a cylin- OTTO ALDINGER. drical casing of electrically. insulating and 40 sound deadening material' and g and z' are 90 covers at both ends thereof and consisting of insulating material as well.` Cork composition has been found to be' very. suitable. a is a shaft which is rotatably carried in suitable bearings of a flanged bracket o which may be 96 secured to an annular projection p on the inside of the cylinder h. The armature of a motor a and a fan-b are keyed on the shaft n. Another anged bracket q is clamped between'the projection p and the ang'e of the 10,

Images