US2250279A - Suction cleaner - Google Patents

Description

y 1941- CH. SPARKLIN SUCTION CLEANER Filed May 22, 1939 4 Sheets-Sheet 1 'IIII'IIIIIIIIIIII 1 n1 fz erzzfin Czar/e6 L27% %W July 22, 1941." c sp 2,250,279

' SUCTION CLEANER Filed May 22, 1939 4 Sheets-Sheet 3 ff #r III" lll l y 1941 c. H. SPARKLIN SUCTIQN CLEANER Filed May 22, 1939 4 Sheets-Sheet 4 Patented July 22, 19 41 S PATENT OFFICE I suo'rroN CLEANER.

Charles H. Sparklin, Chicago, Ill.. assignor to Birtman Electric Company, Chicago, 11]., a corv poration of Illinois Application May 22, 1939. Serial No. 215.091

3 Claims.

This invention relates to improvements in suction cleaners and more especially to an automatic brush feed therefor.

The invention relates particularly to the type I of cleaner employing a rotating brush. This brush is ordinarily located within the nozzle and, in any event, adjacent to the nozzle. During the operation of the cleaner the bristles slowly wear so that after continued use the brush may be too high above the surface being cleaned unless.

, improperly. timed or performed. The principal feature of my invention is the provision of automatic means actuated by operation of the cleaner for feeding the brush downwardly at a rate to compensate for the wear of the brush. Since the feed is actuated by operation of the'cleaner it will be seen that it will always feed the brush downwardly at a rate commensurate with the rate of wear of. the brush. 3

Another feature of my invention is the provision of means'for resetting the brush feed so that upon installation of a new brush the feeding means can be quickly and easily reset to start over again.

Other features and advantages of my invention will appear morefully as I proceed with my specification.

In that form of device embodying the features of my invention shown in the accompanying drawings Fig. 1 is a bottom plan view, Fig. 2 is a view taken as indicated by the line 2 of Fig. 1, Fig. 3 is a vertical sectional view taken transversely through the nozzle, Fig. 4 is a view taken as indicated by the line l of Fig. 3, Fig. 5 is a view taken as indicated by the line 5 of Fig. 3, Fig. 6 is a view takenas indicated by the line 8 of Fig. 7, Fig. '7 is a view taken as indicated by the line I of Fig. 6, Fig. 8 is a view taken as indicated by the line 8 of Fig. 7, and Fig. 9 is a view taken as indicated by the line 9 of Fig. 6.

In thedrawings, the complete suction cleaner is not shown as that is unnecessary to illustrate the present invention. It is to be understood that the invention may be used on any kind of suction cleaner and is particularly adapted for use on the conventional vacuum or suction cleaner embodying a nozzle, suction producing means, and ordinarily a dust collecting bag.

As here shown i0 indicates the nozzle of a sucshown as located just back of the nozzle.

tion cleaner and. H, Ii the lips thereof adapted to be brought into contact with or close to the material being cleaned.

Inside of the nozzle is a conventional rotatable brush I! with the bristles It; said brush being rotated in a well known manner by means of the belt ll driven from suitable means (not shown). The ends of the brush are provided with pivots or trunnions l5 mounted in the bearing blocks l6 mounted in the brush carriers ll. i8 may indicate an adjusting screw in each brush carrier to position the mounting of the bearing blocks l8 therein.

Means are provided for automatically and slowly feeding the brush carriers l'l downwardly to compensate'for wear of the bristles. Such feedingmeans is mounted in the casing 20 here In the present instance the casing 20 is attached to the fan casing It by the screws 22, 22.

23 indicates a reciprocable shoe or drag mem-- the nozzle with the feed mechanism is similar I shall describe but one. 30 indicates a polygonal shaft pivoted in the nozzle walls at 3|, 8|. This shaft carries a crank 32 at the inner end. 33 indicates an arm mounted on the shaft having 9. depending extension 84 connected by the screw 35 to the brush carrier it. It is to be understood that there is a similar arrangement at each end of the nozzle. The rocking of the shafts 30 will therefore lower the brush holders IT. The connection of the extension 34 with the screw is loose enough so that the downward movement of the extension 84 and the brush carrier I! on arcs will not cause binding. The

shai ts 30 are connected by the arms 32 to the links 36 which are moved by the mechanism in the .case 20 when the operating member 28 is reciprocated.

.The operating member 23 is attached by two links 40 and 4! to the vertical shaft l2. 43 indicates a spiral spring connected at its upper end to an extension a on'the arm 40 and at its lower'end to the member 28. Through a parallelogram action the spring 43 serves to partially brush holders.

vcounterbalance the weight of the member 23 so 64 connected by the link 45 to the arm 06 piv-'- oted on the shaft $1. The arm 46 carries the dog 1 adapted to engage the teeth 48 on the wheel 49 so that reciprocations of the dog will rotate the wheel 49 in a counter-clockwise direction as viewed in Fig. 6. Each complete reciprocation of the dog I41 will advance the wheel one tooth. Reverse rotation of the wheel 49' is prevented by the dog 59 pressed upwardly by the spring i. The wheel 49 carries an eccentric 52 embraced by the eccentric strap 53 on the arm 54 which carries the dog 55 engaging the teeth 56 on the wheel 51. It will be seen that each rota tion of the wheel 49 will advance the wheel 51 one tooth. Likewise, the wheel 57 contains a similar eccentric operating through similar mechanism so that each complete rotation of the wheel 5i will rotate the wheel 58 one tooth and likewise this wheel drives the wheel 59. The wheels 59, 5! are mounted on the shaft I60. The wheel 59 carries a pinion l6! operating the gear segment H62 on the arm I63 which is pivoted on the shaft 9? and is provided with a cross member carrying the pins 60 and 61 to which the inner ends of the links 36 are connected.

downwardly about $4; of an inch for every 400 hours of use. It may be roughly estimated accordingly that this much use will ordinarily wear the bristles about of an inch.

If a new brush is installed the feed mechanism may be easily and quickly reset by means of the member 10. Pressing this member upwardly opcrates cam H to release the wheel 59. The cam ll engages the pin 9| on the dog 12 and releases it from the wheel 59. Cam I3 also engages pin 82 on dog 80 and releases it from the wheel 59.

. Wheel 59 when thus released is free to rotate With the brush in its uppermost position the pins and M are substantially one above the other. As the member 863 is slowly rocked the pins 60 and 65 are moved toward a horizontal position to extend the links 96, 36 to lower the It will be seen that the feed mechanism is very slow. For example, the total brush feed may be only approximately 2; inch and the feed mechanism may be so constructed that approximately 500,000 complete reciprocations of. the member 23 are required to feed the brush downw dly of an inch. In so adjusting the mechanism it may be roughly estimated in ordinary operation the cleaner is given about 20 complete forward and backward movements per minute. At this rate, the brush would befed reversely to be reset. The tension of the belt I! on the brush will then pull the brush up to starting position and again retract the links 36, 36.

While there are shown and described certain embodiments of the invention, it is to be understood that it is capable of many modifications.

Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is intended to claim all novelty inherent in the invention as broadly as permissible, in view of the prior art.

What I claim as new, and -desire to secure by Letters Patent is:

1. A suction cleaner, including: a nozzle; a brush associated with the nozzle and downwardly .movable only with respect to the same; and

means actuated by reciprocations of the cleaner in use for cleaning, for progressively and positively feeding said brush downwardly with respect to said nozzle a predetermined increment for each reciprocation.

2. A suction cleaner, including: a nozzle; a brush'associated with the nozzle and downwardly movable only with respect to the same: and

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