US1798418A - Mop - Google Patents

Description

March '31, 1931. HERTZBERG 1,798,418

MOP

Filed Nov. 26. 1928 if I A TTORNE Y Patented Mar. 31, 1931 UNITED STATES HARRY HERTZBERG, F BROOKLYN, NEW YORK MOP Application filed November 26, 1928. Serial No. 321,923.

This invention relates to improvements in mops and more particularly to that type of such devices in which the mop swatchis carried by a sheath of fabric and is supported on a skeleton frame from which it may be re moved for cleaning or other purposes.

It is a particular object of this invention to provide a mop frame which is so attached to its holder that it may be easily and quickly detached therefrom.

It is another object of the invention to provide a mop holder and rotatable frame which are in frictional engagement with each other to hold the mop stationary at different angles with its holder, and to arrest it in one fixed position.

It is a further object of the invention to provide a mop frame which comprises a fully closed loop for the support of the swatch so that objects may not be pressed in between the open space of the frame, be caught therein, and distort the swatch and also to permit a quick detachment of the swatch from its frame. 7

With these and other objects in view which will become clearer as the description progresses, the invention consists in a novel combination of parts and details of construction shown on the accompanying drawings which form a material part of this disclosure and which are finally pointed out in the appended claims. 7 V

In the drawings: Fig. 1 is a plan view of a mop embodying the invention.

Fig. 2, is a sectional side elevation on line 22 of Fig. 1.

Fig. 3, is a plan view of my mop frame from which the swatch is removed, showing the mop frame partly disconnected from its holder.

Fig. 4:, is an enlarged detail plan on line 44 of Fig. 2 showing the engagement of the curved frame ends with the holder bear- Fig. 5, is a sectional elevation on line 55 of Fig. 4.

Fig. 6 is an enlarged face view of the end of 20a in the direction of the arrow of Fig. 3.

In the drawings, 10 is a helical coil of wire,

having an open wound portion 10a and a close wound portion 10?) of smaller diameter. The open wound portion 10a forms a threaded socket for a mop stick 13, the bottom of which leans against the first turn of 10?) which forms a stop therefor. The coil portion 10b holds two flat plates 11 which lie against each other and have each a wide part 110 and a narrow part 11?). Integral with each plate, outside of coil a semicylindrical bearing portion 11a is formed thereon which extends transversely to the coil axis to both sides thereof.

The bearing plates 11 are driven into coil 10?; by force so that the coil is expanded by and the plates locked in the coil by the contraction of those of its turns which lie against 11?).

The resiliency of the coil-turns 106 permit however when force is exerted between the two semicylindrical bearing parts 11a some slight separation thereof so that these parts may clamp an object between them. This mop holder forms the subject matter of my copending application for Letters Patent, entitled Holders for clusters and the like, filed May 8, 1928, Ser. No. 275,985, and the present invention has for its object the carrying forward of the same inventive concept, by providing novel means which cooperate with the above mentioned holder.

The cylindrical bearing 11a holds at opposite ends rotatably mounted therein the end portions 20a of a looped bar 20 which is pre ferably made of spring steel, of a diameter to fit loosely into bearing 11a. The loop formed. by bar 20 is of heart shape, its forward portion is triangular, rounded at its apex, the open side which is attached tohearing 11a is bent inwardly towards the center of the triangle at 20?), with a second bend forming the pivot end portions 20a which are curved as illustrated by Fig. 4.

The mop swatch consists of mop threads 21 which are held together by a tubular fabric binding 22, stitched at 2251 to form a sheath which is slipped over one pivot end 20a of the mop frame and all around the same to the opposite end 20a covering the frame 20 completely. The resiliency of the frame 20 permits ends 20a to be sprung so far apart that bearing 11a may be placed between the two ends 20a as shown in Fig. 3 and to be inserted into that hearing. lVhile the diameter of rod 20 is slightly less than the interior diameter of bearing 11a the curvature of pivots 20a makes theextremepoint 20c whichis shaped'toiform a spur and middle pa t 20d lean tightly against the inner surface of bearing 11a, and as the transverse distance between theseextreme pointsis slightly greater than the diameter of the bearing 11a the frame ends will, when rotated, drive the bearing plates 11 slightly apart. When spurs 200 enter the slot'llc between the hearing plates 11a these plates are partly released of their strain and will close so far together that they h old the mop frame in this position. until force is exerted by means of the leverage afforded by the frame loop to spread the bearing pl ates apart by rotating frame 20. At 11d the bearing plates 11a are provided with notches which slightly engage the spurs 200 so that some force must be applied to move pivots longitudinally out of bearing 11o. Generally it is desirable to bend the spurs Qtlcso that the f ame 20 is arrested to lie in the plane of the mop stick axis. but by bending pivots 20a in a diiferentplanc than that of frame 20 the latter may be arrested at any other angle relative to the mop stick axis. The resiliency of the frame 20 and the friction of curved pivots 20a against bearing walls 11a hold'the mop firmly connected to its holder atany angle with the mop stick axis.

This mop offers various advantages against similar devices which use a swatch of similar construction. Most of such devices have an open gap at some place of 'the loop-frame which is bridged by the sheath. It is a frequent occurrence in the use of such mops that anarrow vertical rod, as for instance the leg of a heating radiator is caught in the gap between the ends of the mop frame andtlie sheath is loosened thereby from the frame. The present inventionprevents this occurrence but does not prevent the removal of the sheath from the mop frame for cleaning or renewal. Another advantage gained by my inventionis the increased stability inherent in a closed frame and particularly the feature that the mop frame and. sheath may be removed together from the holder without the use of tools, which permits to have several mops attachable to the same holder; one for instanceto be used with oil andthe other with water.

The frictional engagement of the curved pivots with the mop holder bearing, which partly produced by the spring action of the holder and partly by the curvature and.resil iency-of the pivots, prevents the mop from swinging on its pivots when such swinging is not desired and the locking action of the bearing jaws holds the mop firmly in the plane of its handle, which is very desirable for storing and shipping. In addition to all these advantages the construction of the whole mop and frame is so simple that it may be manufactured and sold at a very reasonable price.

ll hile I have described the preferred form of my invention it shall be understood that such modifications may be made in the arrangeinent of parts and in the construction means on said plates to hold said frame detachably locked to said bearing.

2. A iop head comprising a handle engaging portion having a transverse bearing thereon consisting of a pair of'oppositely curved plates forming a slot between their abutting edges parallel to the bearing axis, a looped mop supporting frame having opposed end portions formingseparatepivots mounted insaid bearing and spurs on said pivots adapted to enter the slot between said plates to arrest their rotation in said bearing and to hold said frame in fixed position.

3. A mop comprising a handle engaging portion having a transverse bearing thereon, consisting of a pair of oppositely curved plates, a looped frame having integral opposed end portions spaced from each other and adapted to enter said hearing from opposite ends, the loop of said frame providing resilient means 'to hold said end portions within said bearing and resilient means on said handle engaging portion to press said plates yiel'dingly against said end portions.

4;. A mop head comprising a handle engaging portion having a transverse cylindrical bearing thereon, alooped mop supporting frame having opposed endportions rotatably mounted in said bearing, saidend portions being longitudinally slidable into and out ofsaid bearing and humps-on said end portions pressing against the cylindrical inside of said bearin causing friction therewith torestrict movement of said end portions in said bearing.

Signed at Brooklyn, in the county of Kings and State of New York, this 17th day of November A. D. 1928. I

HARRY I-lER-TZBERG.

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