US778170A - Eraser-cleaner. - Google Patents

Description

WIUOLLINS.

' 0 ERASER CLEANER.

N0 MODEL.

IAPPLIGATION FILED MAY 24, 1904.

PATENTED DBO. 20, 1904 anuenfoz' Collirz;

William U IT D STATE Fatented December 20, 1904 P TE-NT ()FFICE,

WILLIAM ooLLms, or FRAZEE, iiiinnnsorn.

"'ERASER-CLEANER.

SPECIFICATION forming part of Letters Patent No. 778,170,01atd December 20,-:1'904.

sota, have invented new and useful Improvements in Eraser-Cleaners, of which the following is a specification.

My invention relates to new and useful improvements in means for cleaning blackboarderasers; and its object is to provide a simple, inexpensive, and compact device of this character into which the erasers can be readily placed and which will thoroughly separate the dust from the erasers and discharge it into a receptacle provided therefon.

With the above and other objects in view the invention consists of a revoluble drum which is suitably mounted above a dust-receptacle, and this drum has oppositely-disposed inlets extending the full width thereof.

By placing the erasers in one of the inlets and rotating the drum in one direction said erasers are caused to drop across the inlets succes sively, and their violent contact with the periphery of the drum causes the dust to be separated therefrom, ,Apertures are provided whereby the dust may be blown from the drum and deposited in the dust-receptacle. By reversing the movement of the drum the erasers are caused to fall outward through the out.

lets instead of dropping thereacross, The invention also consists of the further novel constructionandcombination of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form of my invention, and in which-.- 7

Figure 1 is a perspective view of the machine, and Fig. 2 is a central vertical longitudinal section through the machine.

Referring to the figures by numerals of reference, l 1. are standards which are'preferably crossed adjacent their upper ends'to form forks 2, in which is revolubly mounted ashaft 3, having a crank 4 or other suitable device whereby the same may be readily rotated. Arranged upon. the shaft 3 is a revoluble drum formed of cam-shaped heads 5, having oppositely-disposed shoulders 6, which are in aline- Application filed May 24, 1904., Serial No. 209,511-

ment. Arranged on the peripheries of the heads 5 are curved plates 7, provided with perforations 8, and each plate extends from one set of shoulders 6 to the opposite set and projects between said last-mentioned set of shoulders. All portions of the plates 7 are firmly secured to the heads 5 excepting those which project betweenthe shoulders 6.

Each

of these projecting portions is engaged by a I receptacle for dust, and may be readily slid from positionupon the strips. 11.

When it is desired to clean erasers by means of the machine herein described, the drum is rotated until the two inlets are in a substantially horizontal plane, as shown in the drawings. The erasers are then dropped into the opening 10, extending downward between the shoulders 6, and fall by gravity into the drum.

,By rotating the drum in the direction of the arrow (shown in Fig. 2) the erasers are caused to slide or roll over theinner surfaces of the plates 7 and when the ends of the extensions of saidplates arrive at their lowest positions the erasers will drop therefrom upon the next succeeding plates 7 The violent contact of the erasers with the plates 7 produced in this manner causes the dust to separate from the erasers. When the drum rotates in the direction described, air is caused to circulate therethrough from one opening 10 to the other and carried outward through the apertures 8 in the drum. The dust is thus carried outward and will fall by gravity into the-tray 18. The guide-strips 11 may be of such size as to direct any scattered dust into the tray. By rapidly rotating the drum manually or me chanically in the above-described manner the dust may be quickly removed from the erasers, and after they have been cleaned they can be quickly discharged from the machine by merely reversing the movement of the drum. The erasers will then slide outward under the projecting portions of the plates 7 and through the openings 10. By removing the rods 9 and reinserting them into the apertures provided therefor the projecting portions of plates 7 may be adjusted, so as to increase 'or diminish the size of the openings 10, thereby producing a greater or less drop of the erasers during the cleaning operation. By providing apertures 14 in the projecting portions of plates 7 the supply of air to the drum during its rotation is facilitated.

In the foregoing description I have shown the preferred form of my invention; but I do not limit myself thereto, as I am aware that modifications may be made therein Without departing from the spirit or sacrificing any of the advantages thereof, and I therefore reserve the right to make such changes as fairly fall Within the scope of my'invention.

Having thus described the invention, what is claimed as new is 1. A device of the character described consisting of a revoluble drum having an adj ustable inlet in its periphery, one wall of the inlet forming a ledge within the drum.

2. In a device of the character described, the combination with a revoluble drum having an inlet extending transversely of the periphery thereof; of an adjustable projecting portion Within the drum adjacent the inlet.

3. In a device of the character described, the combination with a revoluble drum having an inlet in the periphery thereof and extending transversely of the drum, said inlet being in a plane with the center of the drum; of an adjustable projecting portion within the drum and adjacent the inlet.

In testimony whereof I aflix my signature in presence of two witnesses.

\VILLIAM COLLINS.

Witnesses:

L. W. OBERHAUSER, \VALTER JUST.

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