US1336760A

US1336760A - Vacuum-cleaner

Info

Publication number: US1336760A
Application number: US282262A
Authority: US
Inventors: Claude W Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-03-13
Filing date: 1919-03-13
Publication date: 1920-04-13
Anticipated expiration: 1937-04-13

Description

w. Smm/ARL VACUUM CLEANER. APPLICQJION FILED NAB. i3, 1919.

UNITED sTATns PATENT OFFICE.

cLAUDn w. STEWART, or MARTINSBURG, WEST VIRGINIA.

VACUUM-CLEANER.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed March 13,'19'19. I Serial No. 282,262.

-following is a full and clear specification.

This. invention has relation to'that type of vacuum cleaner orlsweeper, usually manually propelled, in which an electric driven motor operates a suctionfan and also a brush'mounted in' the intake nozzle, which nozzle` is adapted to rest upon or run close to the floor or eoor-covering, so that as the.

dirt is loosened the inrushing air will carry it into the usual dust-bag; and the .object of the present invention is to simplify and improvethe brush mechanism, as more fully hereinafter set forth..

In the drawin'g-l Figure l is a view partly in side elevation and partly in vertical section showing my invention appiled to a well-known type of cleaner;

Fig. 2is a horizontal sectional view.

In the drawing, a designates the motor which is mounted as usual on top of the sliction chamber, and b the usual fan afxed to the shaft of the motorand running in the suction chamber. Aixed to the depending end of the motor-fan-shaft is an eccentric c which carries a strapd secured by a horizontal pivot d to a pitman c which extends forwardly into the nozzle chamber and is rigidly attached midway the length of the brush f which is in the form of a bar extending approximately the full length of the intake-opening of the nozzle, the

bristles g of-the brush depending downwardly to a point on approximate level ,with the inlet edge of the nozzles. l

The forward end of the pitman and the brush are supported entirely by'a spring L which is located inthe nozzle chamber and extends the full length'of the interior thereof, the ends of the spring being rigidly attached to the interior walls of the chamber and the midlength of the spring being rigidly attached to the front face of the baur of the brush, the latter connection being secured by means of a clip le' which .is also employed for attaching the pitman rigidly to the brush. The spring is of the flat bar or plate type and is set vertically edgewise, so as to have no appreciable sag or yield in a vertical direction, and yet will yield in a fore-and-aft direction sufficiently to permit full reclprocation of the brush by means of 'the eccentric. Between the. point of attach.-

ment ofthe spring to the brush and thel points of attachment thereof to they nozzle walls, a sulicient fullness in the spring is provided to permit the necessary movement of .the brush without binding, this fullness being provided in the present instance by Ybending the spring into a substantially S shape in plan, these S-shaped members being designated L in the drawing. Desirably, the parts will be so proportioned and arranged that while the machine is at rest, the spring will be untensioned, with the eccentric at rest on its rear stroke, so that onv the forward stroke of the eccentric the spring will be' tensioned, thus storing up power which will be utilized in assisting the motor in returning the brush in its backward reciprocation, thereby contributing to easy running of the apparatus.

It will be understood that by reason of the very rapid rotation of the motor and the fact that the eccentric is affixed directly to .the shaft thereof, the brush will receive a very rapid vibratory movement fore-and-aft and will thus veryefectively loosen the dirt in the carpet or other floor-covering and thus insure a thorough cleaning of the floorcovering, which covering will, as is usual in this` type of device, be bulged slightly into the intake nozzle by the suction action and be thus held .resiliently against the rapidly vibrating brush bristles. It will be observed that by employing a vibrating brush, as distinguished from a rotary brush, and susand Vthe strap, which parts will obviously last a great length of time and besides may .be readily renewed when worn. This` extreme simplicity of the brush mechanism' materiallyv reduces the work ofthe motor and besides renders the apparatus entirely noiseless. The spring supporting the brush not only enables me to get rid of all parts which slide or rotate upon each other in the nozzle chamber and thus are subject to wear, but also enables me to employ a type of spring which will in a material way assist the motor, since, as stated above, on the forward stroke of the brusha considerabledegree of power is stored in ythe, spring which, when the spring tends to return to normal, will not only relieverthe motor ofv work but will in fact assist it by a forward thruston the pitman. The use of an eccentric is furtheradvantageous when employed with a pitman-which is supported at its forward end by a laterally-yieldable supporting member and is rigidly connected at the forward end of the brush, because of lthe fact that the brush body will be free to oscillate slightly fore-and-aft at its ends' as the'eccentric rotates, thus contributing to a thorough brushing of the floor-covering fabric.' brush body is assisted by bending the spring at .h2 backwardly away from thefront face l of the brush, as is obvious.

In order to vertically adjust the brush body from timev to time to compensate for wear of the bristles I vertically slot the side walls of the nozzle chamber at y' and 'pass the spring-fastening bolts 71 theredescribed, what is claimed as new is:

l. In a vacuum cleaner of the type set forth, an eccentric affixed to the shaft of thefan-motor, a reciprocable biusli operated by the eccentric, and resilient means for suspending the brush in the'nozzle chamber,

said resilient means consisting of a flat s rin arranged verticali edrewise within This fore-and-aft oscillation of the the nozzle chamber and afixed at its ends to the walls thereof and at a point between its ends to the brush body.

2. In a vacuum cleaner of the type setA forth, an eccentric affixed to the shaft of the 'fan-motor, a reciprocable brush operated bythe eccentric, and resilient means for suspending the brush in the nozzle chamber, said resilient means being adjustably connected at its ends to the wall of the nozzle chamber to permit vertical adjustment of the brush and the resilient means.

3. In a vacuum cleaner of the type set forth, an eccentric-afixed to the fan-motorv shaft, a strap engaging the eccentric, a pitman connected to the strap by a horizontal pivot, a brush attached to the forward end of the pitman in the nozzle chamber, and vertically-adjustable suspending means for the brush.

4. In a vacuum cleaner of the type set forth, an eccentric atlixe'd to the fanmotorshaft, a strap engaging the eccentric, a pitman connected to the strap by a horizontal pivot, a brush attached to the forward end of the pitman in the nozzle chamber, and

' vertically-adjustable suspending means for theibrush, saidsuspending means consisting ofa spring yieldable fore-and-aft of the machine.

5. In a vacuum sweeper of the type. set

`^ forth, an eccentric on the motor-shaft in the suction chamber, a brush suspended in the nozzle chamber so as to have body movement fore-and-aft as wellas a lateral' oscillatory movement, and` a horizontal connecting i member arranged between the eccentric and the brush and supported-entirely by the brush and eccentric. p

In testimony whereof I hereunto affix. my signature. l

CLAUDE w. s'riiwaR-T.