Oct. 8, 1946. 2, L. K. ACHESON ,008 SUCTION CLEANER 4 Sheets-Sheet 1 Filed April 26, 1943 ‘F53’ - INVENTOR, Zowz's KAck @smz " ATTORNEY m s, 1346, 2,409,008. 1.. K. AGHESON SU CTION CLEANER Filed April v26. 1943 4 Shea'ts-Sheat 2 INVENTOR. Zouz's KAcizeson ATTORNEY ~ vi. 8, i945. - ' L, K, ACHESQN , 2,499,008 SUCTION CLEANER Filad April 26, 1943 1 4 Sheets-Shasta 3 ' INVENTOR. " Zoués iiiAmgeeson 91$ 5» 3945- L. K. ACHESON _72,409,998 SUCTION CLEANER ‘ Filed'April 26. 1943 " - 4 SheetsSm-LF: .94 Zoazls KAclz eson BY ‘ W ATTORNEY, 2,409,008 Patented Oct. 8, 1946 UNITED STATES PATENT OFFICE 2,409,008 SUCTION CLEANER Louis K. Acheson, North Canton, Ohio, assignor to The Hoover Company, North Canton, ()hio, a corporation of Ohio Application April 26, 1943, Serial No. 484,511 15 Claims. (Cl. 15—16) 2 1 This invention relates to suction cleaners in general and more particularly to a new and conduit connecting the ?lter-cleaning nozzle with the initial dirt separator; ' suction-creating means, a ?nal dirt separator which receives air from the suction-creating Figure 5 is an exploded view of the air-actuated driving means for the ?lter-[cleaning nozzle; Figure 6 is a section upon the line 6-6 of Fig ure 1 and shows the main cleaning nozzle with seal-breaking means embodied therein; Figure 7 is a view in perspective of the con actuated in a, new and novel manner. weight-actuated switch; novel arrangement of parts in a suction cleaner. More speci?cally, the invention comprises im proved actuating means in a suction cleaner of the type embodying an initial dirt separator, struction of Figure 6; means, and a cleaning nOZZle for the ?nal sepa Figure 8 is a vertical section through a cleaner 10 rator. constructed in accordance with the second pre It is an object of the present invention to pro ferred embodiment of the invention; vide a new and improved suction cleaner. It is Figure 9 is a transverse section upon the line another object of the invention to provide a new 9-4! of Figure 8 and discloses the electrical actu and improved suction cleaner of the type em ating means for the ?lter-cleaning nozzle; bodying initial dirt separating means, air-moving Figure 10 is a section upon the line l9-=I0 of means, ?nal dirt-separating means, and means to Figure 11 and shows the mounting of the bob clean the ?nal dirt-separating means which are A still Figure 11 is a view looking in the direction of further object of the invention is to provide a suction cleaner having a plurality of dirt sepa 20 the arrows upon the line ll—ll in Figure 8 and shows the bob-weight-actuated switch in side rators in combination with means to clean the ?nal dirt separator upon each reoccurrence of elevation; and Figure 12 is a diagrammatic showing of the a cleaner operational characteristic. A still fur ther object of the invention is to provide a suc electrical connections of the cleaner constructed tion cleaner in which the ?nal dirt separator is 25 in accordance with the second embodiment of the cleaned by a ?lter-cleaning nozzle which is actu invention. ‘ ated in cleaner operation by the reoccurrence of Suction cleaners relying upon mechanical dirt a characteristic of that operation, means being separators, as for example separators relying provided to provide such reoccurrence. A still upon centrifugal force to separate the dirt from further object of the invention is to provide a the cleaning air, have been known in the suction suction cleaner having an initial dirt separator, cleaner art for a considerable period of time. suction-creating means, and a ?nal dirt separa The cleaner of this type which also embodies a tor in combination with air-pressure-driven second dirt separator intended to remove that means for cleaning the ?nal ?lter. A still fur small percentage of escaped foreign material ther object of the invention is to provide a suc which has passed through an initial separator is tion cleaner having an initial dirt separator, suc tion-creating means, and a ?nal dirt separator in combination with a ?lter-cleaning nozzle which is provided with a step-by-step movement. These and other more speci?c objects will appear upon reading the following speci?cations and claims and upon considering in connection therewith the attached drawings to which they relate. dis-closed in the patent to Bible original number 2,247,472 reissued June 22, 1943, as Fe. 22,336. The invention here disclosed is an improvement upon that type of machine and has the advan tage of the provision of means which are auto matically actuated upon the recurrence of an operational characteristic of the machine. In the cleaner constructed in accordance with Referring now to the drawings in which pre the present invention it is not necessary for the 45 ferred embodiments of the invention are dis operator to elect to clean the ?nal ?lter as in the closed: Bible construction but instead this necessary step Figure l is a vertical section through a’ suction is accomplished automatically by the machine. cleaner constructed in accordance with the pres In one embodiment of the invention the ?lter ent invention; cleaning nozzle is actuated by an air motor, while Figure 2 is a transverse horizontal section upon the line 2-2 of Figure 1; Figure 3 is a section upon the line 3-3 of Figure 1; Figure 4 is a partial section through the cleaner upon the line 4-4 of Figure 2 and shows the air in another embodiment the actuation is accom plished by the use of electrical solenoids. In neither embodiment is it necessary for the oper ator to connect the ?lter-cleaning nozzle to the source of low pressure in the machine to e?ect 2,409,008 the movement of cleaning air through that nozzle. Referring again to the drawings and to Figures 4 32 is supported at its lower end by a ?anged collar 33 ?xedly carried by the casing 8. At its upper end ?lter 32 is carried by a shouldered 1 to 7 in particular the ?rst preferred embodi portion of a centrally apertured and ?anged plate ment of the invention is illustrated. A cylindri 34 which seats in sealing relationship upon the cal main casing l seats, at its centrally apertured lower end of the casing of motor 29 and which is and ?anged bottom plate 2, upon a supporting itself ?xed in spaced relationship to the enclosing base 3 which seats a removable dirt pan or con main casing l by means of spiders 36 which may tainer 4,-the upper peripheral edges of which are be integrally formed. Collar 33 and upper plate in sealed contact with the bottom plate 2. The 10 34 form end enclosures for the ?lter chamber 3| upper end of the cylindrical casing l is closed by and air escaping therefrom must pass outwardly a motor hood 6 which includes an inwardly through the ?lter element 32 into that space be ?anged motor-supporting wall 1. tween the ?lter and the main casing l which Positioned concentrically within the main cas space is indicated by the reference character 31 ing l is a smaller cylindrical casing 9 which is and which will be referred to as the discharge carried by the inner ?anged peripheral edge of 1 chamber. the bottom plate 2 of the casing l. A transverse Discharge chamber 37 is closed at its upper closure wall I! divides the cylindrical casing 9 end by the plate 1 and at its lower end by the into a lower whirl chamber l2 and upper fan bottom plate 2 of casing l and the only escape chamber IS, the latter being itself divided into therefrom is afforded by the apertures 33 formed a lower stage and an upper stage by a centrally in the casing of motor 29 upon the opposite sides positioned de?ector l4. De?ector I4 is formed of the supporting wall 1 in the hood 6. Air enter with a multiplicity of ?xed guide vanes which ing the lower apertures 38 passes upwardly function to direct the air to the central inlet through the motor casing and escapes from the formed therein and which is indicated as l5. The 25 upper apertures and effects a cooling of the motor top of the fan chamber I3 is closed by cover plate in doing so which is desirable. The motor hood I‘! of the cylindrical casing 9 while the bottom 6 above the plate ‘I is provided with an exhaust of the fan chamber is provided with a down port 39 adapted to receive and seat a dusting tool wardly extending elongated inlet l8 which reaches unit Whenit is desired to use the cleaner as a downwardly beyond the mid-portion of the whirl blowing unit and serves at all times as the cleaner chamber l2. Vertically spaced spiders [9 within exhaust port. Incidentally, the driving motor 29 inlet I8 support a downwardly extending rod 23 is provided with incoming power leads 4| which carrying a transverse pan-closing plate 2| at its are connected to a suitable manually operable lower end and a strainer 22 immediately below switch 42 to enable the operator to control the the lower spider l9. Plate 2| is spaced inwardly 35 operation of the motor and so of the entire from the wall of casing 9 and provides a periph cleaner. eral opening through which the foreign material The machine which has hereinbefore been de can drop from the whirl chamber into the dirt scribed comprises'a completely operative cleaner pan 4 while the strainer 22 prevents the passage but has the inherent defect that no means have upwardly into the suction-creating fan chamber 40 been provided to clean the ?lter 32. To accom [3 of large size foreign objects. plish this desirable result there is provided, in The inlet of the cleaner comprises a port 23 accordance with applicant’s invention, an elon which is adapted to receive and seat the cleaner gated nozzle 46 the length of which is substan end of a dusting tool hose 5 which at its outer tially equal to the height of the ?lter element end carries a suitable cleaning nozzle [0. Inlet 45 and which is adapted to make sliding contact 23 passes inwardly through the outer cylindrical therewith. Nozzle 46 has a ?lter-contacting casing l and connects directly to an inlet cham opening or mouth which contacts only a limited ber 24 which opens tangentially into the whirl area of the ?lter element 32 in any one position chamber l2. The construction is such that air and accordingly means are provided to move the entering through the inlet 23 and chamber 24 50 nozzle relative to the ?lter. This is accomplished enters the whirl chamber tangentially resulting by supporting nozzle 45 by a rotatable conduit in a circular rotary movement of the air which seat 41 which encloses a vertical sleeve 49 which tends to throw the foreign material outwardly houses a motor shaft 28. Conduit 4‘! is formed and permits it to drop downwardly and into the at its inner end with a downwardly facing cir dirt pan 4. 55 cular seat which is rotatably supported upon a Within the suction-creating fan chamber I3 is bearing 5i carried by the similarly shaped up positioned a two-stage fan comprising a lower wardly opening mouth of a stationary conduit rotary fan 26 and an upper fan 21, both carried 52. A second bearing 50 carried by conduit seat by the downwardly depending shaft 28 of a motor 41 mounts the latter rotatably upon the sleeve 29 which is carried by the wall ‘I and is positioned 60 49. Conduit 52, however, is ?xedly mounted upon partially within the motor hood 6 and partially the fan chamber top plate I’! in ?xed relation within the upper end of casing l. The rotation ship and extends across the top thereof and down of the motor shaft 28 causes the tandem fans 26 the side of the fan chamber and connects to the and 21' to draw cleaning air in through the inlet entrance of the inlet chamber 24 of the whirl port 23 and to remove the cleaned air upwardly chamber 12. through the inlet I8 into the fan chamber from Filter-cleaning nozzle 46 'is entirely uncon which it is exhausted through suitable ports 35 nected to the driving-motor 29 and to provide into a surrounding chamber which is indicated actuating means therefor which will propel it at 3| and which will be called the final ?lter around the inner surface of the ?lter 32 there is chamber for a reason which will become appar an air motor. ent. De?ning the side wall of the ?nal ?lter chamber 3| and spaced inwardly from the en closing main casing l is a cylindrical ?lter ele ment 32 formed of suitable air-permeable dirt impermeable material such as ?lter cloth. Filter 75 cup-shaped casing 54 secured to the underside of closure Wall 34‘of?nal ?lter chamber 3| and This motor is located within a sealed by a seal 56 to the peripheral wall of a contoured plate 51 ?xedly carried by the conduit seat 41 of the nozzle 46, A large ratchet gear 2,409,008 58 is ?xedly secured to the top surface of the plate 51, the gear, the plate 51 and the conduit seat 41 with the nozzledt being rotatable as a unit on the bearings 59 and 5|. To insure the 6 ward movement of the bottom plate of the bel lows causes the lever ‘H to move in a clockwise direction and the pin 74 to return to its original position without movement of the ratchet ring seating of the conduit seat upon the bearing 5: 5 58 and into position to engage a new tooth of that ring upon the subsequent and next collapse of the there is provided a coil spring 59 which encircles bellows. A plurality of bell crank levers ‘H are the bearing 58 and exerts a force between the indicated in Figure l and a suf?cient number is ?anged end thereof and the surface of the con provided to insure a positive action, the exact duit seat 47. number used not being of the essence. The air- motor comprises an air-tight ?exible To insure that the air pressure within the bel bellows (H which encircles the motor 2.‘! at its lows El will vary with regularity during cleaner lower end and within the cup-shaped casing 54. operation means are provided to insure the vari The walls of bellows ti are formed of rubber or ation of that pressure within the inlet 23 and suitable air-tight air~impervious material which is su?lciently ?exible as to be expansible under 15 inlet chamber 24. These means comprise a rock plate 15 which is pivotally mounted within the changes of pressure which are within the range mouth of the cleaner nozzle Ill being adapted to of the pressures found in a suction cleaner. Bel pivot from side to side of the mouth as illustrated lows BI is provided with a rigid top plate 62 ?x in Figures 6 and 7. Upon the forward movement edly secured to a closure plate 63 forming the top of the cup-shapedv casing 54. A lower bellows 20 of the nozzle over a surface being cleaned ‘the rock plate will be pivoted'to the rearmost dotted plate 66 is also rigid and is ?xedly attached to line position illustrated in Figure 6 and will re an exterior bottom plate 66. Bellows ii! is inte main there during the entire forward stroke. riorly connected to the entrance to the inlet Upon the reversal of the direction of the nozzle chamber 24 of whirl chamber l2 by means of an air conduit 5'! which, as illustrated. in Figure 1, 25 movement the frictional contact of the rock plate with the surface will cause the plate to move from may be made of rubber or other suitable mate the right hand position illustrated in Figure 6, rial which connects to nipples 68 and 65 carried through the central dotted line position, to the by the top plate 52 of the bellows and the inlet full line position shown in the same ?gure. As conduit 23, respectively. With the machine in operation and a reduced 30 illustrated in Figure 6 when in the vertical posi tion the rock plate extends considerably below pressure existing within the intake port 23 and the plane of the nozzle mouth and, being in con intake chamber 24 that pressure is also present tact itself with the supporting surface covering within the bellows 2d by virtue of the conduit con undergoing cleaning, would in this position raise nection El and the bellows is contracted, being the nozzle mouth from its sealing contact with moved to a collapsed condition from the expand the surface covering. This breaking of the noz ed or lower position illustrated in Figure 1, Sur? zle seal permits an inrush of air into the cleaner cient reduction of pressure is present within the which effects an increase in the pressure present bellows Si to collapse it whenever the cleaning at the inlet 23 and inlet chamber 24 and directly nozzle It is sealed against a surface undergoing cleaning, but upon the breaking of that seal the 40 produces an increase in pressure in the bellows El and causes its expansion, This nozzle-lifting inrush of air raises the pressure and the bellows action of the rocker plate ‘l6 occurs only upon expands, the weight of the lower plates 64 and 65 reversal in direction of nozzle travel which occurs being sufficient to accomplish this expansion al at each end of each operational stroke. During though additional resilient expanding means can be provided if necessary. The expanding move 45 nozzle movement and excepting the period of direction reversal at the end ofeach stroke plate ment of the bellows 6! is transmitted to the noz ‘it lies against one wall of nozzle [0, as illustrated zle-connected ratchet ring 53 by means of a bell in full lines in Figure 6, and its lower edge forms crank lever ‘H which is centrally pivoted upon a continuation of the adjacent nozzle lip pro a bracket 1?. supported by the interior surface of the cup-shaped casing 54 immediately under the jecting therebelow only sufficiently to insure that bellows GI. upon the reversal of direction of movement the frictional resistance against the supporting sur One end of bell crank lever ‘ll is connected to the bottom plate 66 of the bellows face will be su?icient to effect the pivotal action 6| through its pivotal connection with a depend described. ing arm 13 ?xedly connected to plate 66. Clearly the vertical displacement of the bellows bottom 55 In theoperation of this embodiment of the invention cleaning air with foreign material is plate 66 of the bellows 6| results in the pivotal drawn into the cleaner through the nozzle Ill. movement of the lever Tl. Transmission of this through conduit 5. and into the whirl chamber l2 movement to the ratchet gear 58 is by means of where by centrifugal action substantially all the a spring-pressed pin or detent ‘it which is carried by the lever ‘H at a distance from its pivotal axis 60 foreign material is removed from the air and drops into the dirt container 4 positioned below at a position as to engage the teeth of the ratchet the 'whirl chamber. The cleaned air enters the ring 58 which teeth are so contoured as to engage fan chamber 13 through the depending inlet l5 pin ‘hi in the pivotal movement of lever ‘H in one ,_ and is exhausted from the fan chamber by the direction only, that direction being counter clock wise as viewed in Figure 5, and to cam the pin 6° fans 25 and 2'! into the ?nal ?lter chamber 3|. outwardly without engagement in the pivotal movement of the lever in the opposite direction. From the latter chamber the air passes through the ?lter 32 into the surrounding discharge chamber 3'! from which it escapes into the am The relationship is such that as the lever ‘H is bient atmosphere via the apertures 33 in motor moved in a counter-clockwise direction as viewed in Figure 5, which occurs upon the collapse of 70 casing 29 and exhaust port 39 in motor hood 6. As stated, practically all of the foreign material the bellows under a reduced pressure, the ratchet is removed in the whirl chamber l2, but a very gear '58 is rotated together with the nozzle 46. small percentage of fine dust does escape there Upon the expansion of the bellows, which as from and is collected upon the ?nal ?lter 32. stated occurs upon an increase in the internal pressure therein as above explained, the down 75 This collected material is removed by the ?lter 2,409,008 cleaning nozzle 46 which is actuated, as described, by the reciprocation of the air bellows 6| which effects the step-by-step rotation of the ratchet ring 58 rigidly connected to the nozzle. At all times during cleaning operation air is drawn through the ?lter-cleaning nozzle 46 and the contacted surface of the ?lter 32, the direction of air movement through the ?lter surface into 8 of the ?nal ?lter chamber 3|. The armature 82 of each solenoid extends tangentially of- the ratchet gear 58 being slidably mounted within the solenoid and supported by spaced bearing seats 83 also secured to the underside of the closure plate 34. A coil spring 84 is interposed between the headed end of each armature ele ment 82 and the bearing seat 83 and at all times the nozzle 46 being in the opposite direction to exerts a force upon the armature 82 which tends the normal direction of the flow therethrough. 10 tomove it outwardly from its stator. The air leaves the nozzle‘46 and passes through Each solenoid armature 82 carries a pivoted conduits 41 and 52 to join of the cleaner at the inlet enters the whirl chamber. ment of the ?lter-cleaning the main air stream chamber 24 where it Step-by-step move nozzle 46 is effected, 15 as previously described, by the ?uctuations in the air pressure at the inlet chamber 24 result detent 85 which is urged by a leaf spring 81, also carried by armature 82, into contact with the adjacent teeth of the ratchet gear 58. The teeth of ratchet gear 58 are so shaped and the rela tionship and position of the detent 8G is such that upon the inward movement of the arma tures 82 at the solenoid the gear 58 is rotated whereas upon the outward movement of the ar upon the reversal of movement of the nozzle. 20 matures under the actuation of the coil spring Each time the nozzle direction of movement is 84 the detent slides past the gear teeth without reversed the rocker plate lifts the nozzle, breaks causing‘ movement of the gear. the nozzle seal, whereupon the air pressure in Reference to Figure 12, comprising a diagram the nozzle and bellows increases and the bel matic showing of the electrical circuit of the lows drops to the position shown in Figure 1. 25 cleaner, illustrates that the solenoids 8| are con Upon the seal being reestablished immediately nected across the incoming power leads 4| and following the reversal of direction of movement, are controlled by a single switch 83. This switch the bellows is contracted, the ratchet ring is ad is bob-weight actuated and is clearly illustrat vanced a single step, and the nozzle is moved ed in Figures 3, l0, and 11 and is seen to com to a new position. The ?nal ?lter 32 is regu prise the usual mercury switch mounted upon a larly cleaned by nozzle 46 and the back pressure vertical spring element 9| together with a bob in the cleaner never increases beyond a reason weight 92. Spring 9| is mounted for ?exing in able limit as a result of the accumulation of for a base 93 and the entire unit is housed within a eign material. housing 94 positioned exteriorly of whirl cham Turning now to the second embodiment of the ber l2 and within the main casing I. The con invention illustrated in Figures 8 to 12, inclusive, struction is such that as the machine is moved it is seen that the cleaner generally is very sim from place to place in the cleaning operation, ilar to that described in connection with the ?rst the bob-weight 92 will accomplish the tilting of embodiment. Accordingly, similar reference the mercury switch 89 in the usual and well characters are applied to similar parts and only known manner thereby establishing electrical those features of the cleaner will be described circuit through the solenoids. Each time the which differ from the ?rst embodiment in a ma electrical circuit is established each solenoid is terial respect. The principal difference between energized and its armature 82 is drawn into and the second embodiment and the ?rst lies in the toward the stator thereupon moving the ratchet actuating means for the ?lter-cleaning nozzle 49, gear 58 in a clockwise direction as viewed in Fig the air-operated motor of the ?rst embodiment ure 9. This gear being ?xedly connected to the ?l being replaced by electrical solenoids which are ter-cleaning nozzle 46 directly results in the step controlled by a bob-weight-actuated switch. by-step actuation of that element relative to the In this embodiment the main nozzle, dusting ?nal ?lter 32. The operation of this embodiment tool hose, inlet, whirl chamber, suction-creating 50 of the invention in its general outline is similar fan unit, and ?nal ?lter unit together with the to that ?rst described, the di?erence lying in the driving motor and the exhaust passageways can actuation of the ?lter-cleaning nozzle which is be considered to be identical for all practical pur by means of the electrical solenoids controlled poses with the ?rst described embodiment of the by the bob-weight-actuated switch as previously invention. The cup-shaped casing 54 of the ?rst 1 55 described. embodiment which housed the air-operated m0 I claim: tor has been eliminated and the closure plate 34 1. A suction cleaner having an inlet port for comprises the only closure for the top of the ?l dirt-laden air, a main cleaning nozzle connected ter chamber 3| and extends entirely across to thereto and adapted to vary the air ?ow through the motor casing 29 to which it is ?xedly con nected. The ?lter-cleaning nozzle 46 is again 60 and the air pressures in the cleaner by its con tact with a surface being cleaned, a preliminary rotatably mounted upon the conduit seat 47 separator connected to said inlet port, suction which in turn is carried by the lower bearing 5| creating means connected to said preliminary on the lower conduit 52. The upper bearing 56 separator to draw air therethrough, a ?nal dirt of member 47 is located within the ratchet ring or gear 58 carried directly ‘by the top surface of 65 separator connected to said suction-creating means to receive air exhausted therefrom, a driv the conduit seat 41', the coil spring 59 acting be~ ing motor for said suction-creating means, mov tween the bearing 50 and a shoulder upon the able dirt-removing means to remove foreign sleeve 49 to force conduit 47 against bearing 5|. The actuation of the ratchet gear 58 in this 70 material from said ?nal separator, air-conduct ing means to connect said dirt-removing means embodiment of the invention for the purpose of to said preliminary separator, a pressure-varia actuating the ?lter-cleaning nozzle 46 is ac tion-actuated air motor to drive said dirt-re complished by the following mechanism. A pair moving means, and air-conducting means to con~ of electrical solenoids 8| have their stators ?x nect said air motor to a point of air pressure edly carried on the underside of the top wall 34 75 variation in said cleaner. ~ ing from the breaking of the covering seal of the main cleaning nozzle I 0 by the rocker plate 16 2,409,008 9 2,. A suction cleaner having an inlet port for dirt-laden air, a main cleaning nozzle connected thereto and adapted to vary the air flow through therefrom, a driving motor for said suction crea-ting means, movable dirt-removing means to remove foreign material from said ?nal sepa and the air pressures in the clean-er by its con tact with a surface being cleaned, a preliminary separator connected to said inlet portion, suction creating means connected to said preliminary separator to draw air iiierethrough, a ?nal dirt separator connected to said suction-creating means to receive air exhausted therefrom, a driv ing motorfor said suction-creating means, mov able dirt-removing means to remove foreign ma 10 to said preliminary separator to draw air there through, a ?nal dirt separator connected to said suction-creating means to receive air exhausted rator, air-conducting means to connect said dirt removing means to said preliminary separator, means actuated by variations in air pressure in 10 said cleaner to mOVe said dirt-removing means, terial from said ?nal separator, air-conducting means to connect said dirt-removing means to and means to cause variations in said air pres sure comprising means to lift said nozzle upon re versal in the direction of nozzle travel. '7. In a suction cleaner, a surface cleaning nozzle, suction-creating means to draw cleaning said preliminary separator, a pressure-responsive 15 air through said nozzle, a dirt separator to re element connected to said dirt-removing means to exert a moving force thereon, and air-conduct move dirt from air passing through said nozzle, ing means connecting said element to a point of air pressure variation in said cleaner. 3. A suction cleaner having an inlet port for separator, and step-by-step means to effect the dirt-laden all‘, a preliminary separator connected dirt-removing means to remove dirt from said step-by-step movement of said dirt-removing means under predetermined air pressure condi tions in said surface-cleaning nozzle, and to said inletport, suction-creating means con manually operable means including said nozzle nected to said preliminary separator to draw air to produce said conditions in said surface-clean therethrough, a ?nal dirt separator connected to ing nozzle. 7 said suction-creating means to receive air ex 8. In a suction cleaner, a body movable along hausted therefrom, a driving motor for said suc a supporting surface, a part movably supported tion-creating means, movable dirt-removing on said body and movable by the operator as an means to remove foreign material from said ?nal incident to the physical displacement of said body separator, air-conducting means to connect said relative to the supporting surface, a dirt separa 30 dirt-removing means to said preliminary separa tor, means to move dirt-laden air through said tor, an air-pressure-variation-actuated air motor separator, dirt-removing means to remove dirt directly connected to said dirt-removing means from said separator, means to effect intermittent to drive same and interiorly connected to a point relative movement between said dirt-removing of air ?ow in the cleaner, and means to provide means and said separator to perform the clean ?uctuation in the air pressure in said cleaner 35 ing operation, and means controlling the actua to drive said air motor. tion of said last-mentioned means and including 4. A suction cleaner having an inlet port for means positioned by the movement of said mov dirt-laden air, a main cleaning nozzle connected able part upon said operator movement of said thereto, a preliminary separator connected to body along the supporting surface. said inlet port, suction-creating means connected 40 9. In a suction cleaner, a movable surface-con to said preliminary separator to draw air there tacting nozzle, a dirt separator, means to move through, a ?nal dirt separator connected to said dirt-laden air through said separator, dirt-re suction-creating means to receive air exhausted moving means to remove dirt from said separa therefrom, a driving motor for said suction tor, air-pressure-variation-operated means to creating means, movable dirt-removing means to effect relative movement between said dirt-re remove foreign material from said ?nal sepa moving means and said separator to perform the rator, air-conducting means to connect said dirt cleaning operation, and nozzle-lifting means po removing means to said preliminary separator, sitioned by the operator movement of said mova an air motor directly connected to said dirt ble nozzle to lift said nozzle from a surface cover removing means to actuate same, air-conducting ing to vary the air pressure at said air-pressure means connecting said air motor to said inlet, lvariation-operated means. and means in said nozzle to vary the pressure at 10. In a suction cleaner, a main casing, a dirt said inlet with each reversal in the direction of separator therein, means to move dirt-laden air travel of said nozzle. through said separator, dirt-removing means to 5. A suction cleaner having an inlet port for m Um remove dirt from said separator, means to effect dirt-laden air, a main cleaning nozzle connected relative movement between said dirt-removing thereto, a preliminary separator connected to said inlet port, suction-creating means connect ed to said preliminary separator to draw air means and said separator to perform the cleaning operation, and means controlling the actuation of said last-mentioned means and including therethrough, a ?nal dirt separator connected cs 9 means positioned by the operator movement of to said suction-creating means to receive air eX said main casing. hausted therefrom, a driving motor for said suc-, 11. In a suction‘ cleaner, a body movable along tion-creating means, movable dirt-removing a supporting surface, a part movably supported means to remove foreign material from said ?nal separator, air-conducting means to connect said dirt-removing means to said preliminary separa tor, step-by-step means actuated by variations in air pressure in said cleaner to move said dirt-removing means, and means including said nozzle to effect variations in the air pressure of said cleaner. 6. A suction cleaner having an inlet port for dirt-laden air, a main cleaning nozzle connected thereto, a preliminary separator connected to said inlet port, suction-creating means connected on said body and movable by the operator as an incident to the physical displacement of said body relative to the supporting surface, a, dirt separa tor, suction-creating means to move dirt-laden air through said separator, a nozzle connected to said suction-creating means to remove dirt from said separator, a ratchet gear connected to said nozzle and movable therewith, a reciprocatory motor to actuate said gear with a step-by-step movement, and means controlled by the move ment of said movable part upon said operator 11 2,409,008 - 12 movement of said body along the supporting sur said nozzle, and a, pivoted rocker element in face to energize said motor. said nozzle in contact with a surface undergoing 12. In a suction cleaner, a movable cleaning cleaning adapted to lift said nozzle upon a re nozzle, a dirt collector, suction-creating means to versal in the direction of movement thereof to move dirt-laden air through said nozzle and col 5 admit air into said nozzle to decrease said suc lector, a second nozzle connected to said suction tion and to vary the pressure in said bellows. creating means to remove dirt from said collector, 14. In a suction cleaner, a movable cleaning a ratchet gear connected to said second nozzle , nozzle, a dirt collector, suction-creating means to and movable therewith, an expansible-contracti move dirt-laden air through said nozzle and col ble air bellows, means connecting said bellows 10 lector, a second nozzle connected to said suction to said ratchet to effect the movement thereof creating means to remove dirt from said collector, upon the movement of said bellows, air-conduct a ratchet connected to said second nozzle and ing means connecting said bellows to a point in movable therewith, an electric solenoid to actuate the air stream moved by said suction-creating said ratchet, and means adjustable by an op means, and means in said cleaning nozzle to erator in the movement of said cleaner to control effect variations in pressure in said air stream the ?ow of electric current to said solenoid, to energize said bellows. 15. In a suction cleaner, a body, a movable 13. In a suction cleaner, a movable cleaning cleaning nozzle, a dirt collector, suction-creating nozzle, a dirt collector, suction-creating means means to move dirt-laden air through said nozzle to move dirt-laden air through said nozzle and 20 and collector, a second nozzle connected to said collector, a second nozzle connected to said suc suction-creating means to remove dirt from said tion-creating means to remove dirt from said col collector, a ratchet connected to said second noz lector, a ratchet connected to said second nozzle zle and movable therewith, an electric solenoid and movable therewith, an expansible-contracti to actuate said ratchet with a step-by-step move ble air bellows, means connecting said bellows to 25 ment, and a bob weight actuated switch carried said ratchet to e?ect the movement thereof upon by said body and movable to closed position to the movement of said bellows, air-conducting energize said solenoid upon the movement of said means connecting said bellows to a point of suc tion between said suction-creating means and body. - LOUIS K. ACHESON.