US2262839A - Surface treating machine - Google Patents

Description

Nov. 18, 1941. H. A; FALLoN SURFACE TREATING MCHINE Filed Feb. 26, 1940 INVENTOR He/y r? -//O/f ATTORNEY. v

Patented Nov. 18,v 1941 SURFACEl TREATING 4IVACHIINTE Henry A. Fallon, St. Joseph, Mo., assignor to Hillyard Chemical Company, St. Joseph, Mo., a

corporation Application February 26, 1940, SerialNo. 320,835

3 Claims.

This invention relates to surface treating machines of the character employing a power driven, abrasive carrying drum, and the primary object of the invention is the provision of such a machine with means for collecting dust and particles which are removed from the surface.

One of the important aims of this invention is to provide a machine of the above character wherein the abrasive carrying drum is so disposed, with respect to parts of a specially formed body, as to create air currents that are directed toward a receiving receptacle formed within the body and wherein relatively heavy entrained particles will s'eparate from the currents of air and settle by gravity during the operation of the machine.

A yet further object of this invention is to provide a surface treating machine with a rotatable drum and a motor driven fan that cooperate in depositing particles in a specially created receptacle as the same are produced through the operation of the machine; said fan serving to evacuate the receptacle of dust and lighter material and to prevent eddy currents that would otherwise carry the dust out of the receptacle.

Other objects of the invention will appear during the course of the following specification, referring to the accompanying drawing wherein:

Figure 1 is a side elevation of a surface treating machine maderto embody the features of this invention.

Fig. 2 is a vertical, longitudinal, central section through said machine.

Fig. 3 is a vertical, cross-sectional view through the same taken on line III- III of Fig,` 2.

Fig. 4 is a vertical, sectional view through the machine taken on line IV-IV of Fig. 2, and

Fig. 5 is a fragmentary, detailed sectional view taken on line V-V of Fig. 1.

The surface treating machine embodying this invention preferably comprises a body having a top 8, sides Iii, ends I2 and a bottom Il, all of which are combined to create a box-like body provided with an opening I6 through the bottom I4 thereof adjacent to the forward end of-the body. A cylindrical drum I8 is mounted upon shaft 20 which in turn is journalled in bearings 22 carried by the opposite sides I0 of the body. These sides carry shaft 20 so that it may be rotated through the medium of pulley 24, mounted thereon exteriorly of the body.

A motor ZBcarried on top of the body is in operable connection with drum I8 through the be adjusted as to tension through the use ot slotted brackets 30 o1' conventional character,

A handle 32 secured to the body extends to a kpoint within easy reach of the operator and ward pressure on drum I8 is secured when the operator swings handle 32 and the body of the -machine around the aligned axesof rollers 36.v

'I'he abrasive material on drum I8 is in the form of a ribbon of steel wool 42. This ribbon is substantially the same width as drum I8 and is wound around the outer annular face of the drum I8 in successive layers, thewinding being in a clock-wise direction s o that as drum I8 is rotated in the direction of the arrow (Fig. 2) the free end will be held against the remaining portion of the steel wool. One end of the ribbon of steel wool is held in place by a specially formed clamp which comprises -a longitudinal slot 44 and a bar 46. Slot 44 is formed through the wall of drum I8 and bar 46 is within the hollow drum adjacent to said slot, Machine screws or the like 48, extend through small openings in the side of ldrum I8 and into screw-threaded engagement with each end of bar 46, thus when the ribbon of steel wool is between bar 46 and the inner face of drum i8, these machine screws may be tightened and thus clamp the end of the ribbon of steel wool 42 in place. n

A partition 50 is formed within' the housing substantially parallel to and inspaced relation with a portion of the top 8 and en d I2. This partition 50 entends from side tofside and creates a passageway 52 through which air currents are forced in the direction Aof the arrows shown in Fig. 2, for the, purpose of keeping the surface being treated free from foreign particles. The rotation of drum I8 is suillcient to set up the currents just mentioned and a portion of the body rearwardly of drum I8 and above bottom I4 serves as a receptacle toy catch the particles which are carried thereinto by the said currents of air. In the commercial use of a machine made exactly as illustrated, al1 particles which it is medium of pulley 24 and belt 28. This belt may 55 desirable to collect are retained within the body rearwardly of Jdrum I8 and may be removed therefrom through an opening 54 provided in the rear end I2. The forward end I2 is removably associated with the rest of the b odygand carries that portion of partition 50 which is in parallel spaced'relation thereto.

Thumb-screws 56 are employed to hold this removable end I2 in place and inclined slots 58 formed in opposed sides I receive pins 60 carried by end I2. A rubber strip 62 mounted upon forward end l2 engages the surface being treated and bridges the distance between the forward portion of the machine' and the surface being treated so that air currents travelling throughl passageway 52 will be directed upwardly from the said surface between drum I8 and strip 62 to carry free particles from that portion of the surface being treated. The removal of this forward end I2 will permit adjustingthe screws tric motor 64 drives fan 66 which is removably.

secured behind opening 54. Housing 68 contains both the motor 64 and fan 66 and plate 16, provided with a hole 12 therethrough, fits over opening 54, as seen in Fig. 2.

Ashield 14 of foraminous material is mounted on plate over hole 'I2 and is arched to extend into the body of the machine. Spring clips 16, carried by plate 10, engage the inner face of end wall I2 to removably secure the suction means in place. v f

Bag 18 has one end hung upon handle 32 and the other end in communication with 'housing 68 so' that dust and fine particles are collected therein during the operation of the machine'. Shield 14 precludes `the passage of particles of steel wool into bag 'I8 and the m'otor 64 should be run at a rate of speed below that which would cause fan 66 to establish too great a draft. This fan is employed merely as means for collecting dustv and for withdrawing air lfrom within the 1. A surface treating machine of the kind described comprising a hollow box-like body having a top, a pair of sides, an apertured rear end wall, an upwardly and rearwardly curved front end wall, and a bottom wall provided with an opening adjacent to the front end wall whereby a material-receiving cavity is formed in one end 'of the box-like body; a surface treating drum -a portion of the top to form a passageway ex-. tending partially around said drum and in coin-fJ munication with the cavity, said drum serving to set up currents of air through the passageway and into the cavity from each side 0f its line of contact with the surface being treated; a suction fan in the aperture of the rear end wall for withdrawing air and dustfrom the cavity; and a motor operably connected to the suction fan for driving the same, said last mentioned motor being a low speed type, said motor on the body being a relatively high speed motor.

2. A surface treating machine of the kind described comprising a hollow box-like body havj ing a top, a pair of sides, an apertured rear end wall, an upwardly and rearwardly curved front end wall, and a bottom wall provided with an opening adjacent to the front end wall whereby spaced relation -with thesaid front end wall and a portion of the top to form a passageway extending partially around said drurn and in cornmunication with the cavity, said drum serving to set up currents of air through the passageway and into the cavity from eachA side of its line of contact with the surface being treated; a suction fan in the aperture of the rearend wall for with- Idrawing air from the cavity; a relatively low speed motor operably connected tothe fan; and an inwardly .arched shield extending into the cavity to prevent passage of large particles of material into the'fan, said motor, fan and lshield being movable as a unit to and from the'operative position.

3. A surface treating machine of the kind described comprising a hollow box-like body having a top, a pair of sides, an apertured rear end wall, an upwardly and rearwardly curved front end wall, and a bottom'walll provided with lan opening adjacent to the front end wall whereby a material-receiving cavity is formed in one end of the box-like body; a surface treating 'drum rotatably mounted in the body with a portion thereof extending below` the bottom wall into contact with the surface being treated; a motor on said body having operable connection with the drum for rotating the same; an upwardly and rearwardly curved partition in the body in spaced relation with the said front end wall and a portion of the top td lorm a passageway extending lpartially around s id drum and in communication with the-cavity, said drum serving'to set up currents of air through the passageway and into the cavity from each'side of its line of contact with the surface being treated; a suction fan in the aperture of the rear end wall for Withdrawingr air from the cavity; anda shield to prevent passage of large particles of material into the fan, said suction fan and shield being carried by a plate'having spring clips thereon forf'engaging vthe rear end wall, said shield beingsecured to the plate whereby the fan, plate and shield may be removed from the operative position on the body as a unit.

HENRY A. FALLON.'

Images