US772822A - Blackboard-eraser cleaner. - Google Patents

Description

BATENTBD OCT. 18, I904.

I P. A. PETERSON.

BLAGKBOAYRD ERASER CLEANER.

AP PLIOATION'FILED MAY 14. 1904.

NO MODEL.

Witnwbeo the eraser.

medium of a connecting-link 11.

Patented Qctober 18, 1904.

P TENT, OFFICE.

PETER A. PETERSON, or CEDARRAPIDS, IOWA.

BLACKBOARD-ERASER CLEANER.

SPECIFICATION forming" part of Letters Patent No. 772,822, dated October 18, 1904. Application filed May 14, 1904. Serial No. 208,028. (No model.)

To all whom, trim/my concern:

Be it known that I, PETE A. PETERSON, a

. citizen of the United States, residing at Cedar Rapids,in,the county of Linn and State of Iowa, have invented new and useful Improvements in Blackboard Eraser Cleaners, of which the following is a specification.

This invention pertains to a-device for cleaning chalk-dust from blackboard-erasers, its construction being simple and of few parts, easy of operation, and thoroughly effective in its result. 7 1

In the accompanying drawings, Figure 1 is a View of my invention as seen from oneside. Fig. 2 is a similar view of the opposite side. Fig. 3 is a plan View. Fig. 4 is a longitudinal sectional View on the line a Fig. 2. Fig. 5 is a-view in cross-section on the line b b, Fig. 4. I

Similar numerals indicate the same parts throughout the drawings.

1 indicates a box, preferably rectangular in cross-section and of a length sufficient for the use to which it is put. The ends of-the box are closed by covers 2, while in one of its sides and apart of its top an opening is made through which. an eraser to becleaned is inserted. The opening is covered by a rightangled closure 3, (see Fig. 5,) from which a pin or other projection 4 extends inwardly tobear on-the hand-grip of the eraser 5 and hold itin position. Flanges or stops adjacent the opening prevent endwise movement of The closure may be held in place by hand or by any well-known form of fastening. Passing through one end of the box 1 is a cross-shaft 6, having a crank on either end 7, carrying a handle 8 to be grasped by the fingers for turning the shaft, while the other, 9, reciprocates a brush 1O throughthe The brush 10 is arranged to slide between guides 12, thebristles of said brush being directed inward v toward the eraser. Italso has a slide 14: pro

. ings.

jecting from its back through a slot 13 in the box 1, to which the connecting-link 11 is attached.

The operation of my eraser-cleaner is readily understood from an inspection of the draw- The closure 3 is removed and ablackboard eraser placed therein between the flanges 15, with its-working face against the brush. The closure is then replaced, the pin or projection 4E thereon holding the eraser steady. The crank being turned, the brush '10 moves back and forth over the working face of the eraser until it is thoroughly cleaned. The dust escaping from the eraser settles in the bottom of the box' and may be removed therefrom by taking off either or both caps 2.

Having thus described the invention, what is claimed as new is- I 1. In a blackboard-eraser cleaner, the combination of a box having an opening in one side for inserting the eraser, a closure for sa d opemng, an lnward PI'OJQCUOII on said closure for holding the eraser in place, a

brush mounted within said box for operating on the eraser, guides for said brush, means for reciprocating said brush, and removable Bnd'caps'for the box; l

2. Ina blackboard-eraser cleaner, the combination of a box having a continuous opening formed partly'in two sides thereof, flanges at the sides of said opening to prevent endwise movement of the eraser placed in said box, a closure for said opening having a pro- -jection thereon to rest on the top of an insert ed eraser, and a brush adapted to be reciprocated across theworking face of an eraser to clean the same.

In testimony whereofI aflix my signature in presence of two witnesses.

PETER A. PETERSON. Witnesses: ANNA BURIANEK, N. E. NEMEoEK.

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