US2414872A - Blackboard cleaner - Google Patents

Description

S. S. HARTER BLAGKBOARD CLEANER Jan. 2s, 19,47.

2 Sheets-Sheet v1 Filed Jan. 7, 1944 Jan. 28, 1947. s, s, HARTER 2,414,872

BLACKBOARD CLEANER Filed Jan. 7, 1944 2 sheets-sheet 2 V v Im'enlor SPL/@fom 5. /7/72 TE/z WWW Patented Jan. 28, 1947 I UNITED STATES PATENT OFFICE BLACKBOARD CLEANER.

Spurgeon S. Harter, Chadwick, Ill.

Application January 7, 1944, Serial No. 517,461

1 Claim.

The present invention relates to new and useful improvements in blackboard cleaners, and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character which will rapidly and thoroughly clean various kinds of blackboards without the the use of water, While at the same time eliminating dust.

Another important object of the invention is to provide a device of the aforementioned character on which the usual felt erasers may be conveniently cleaned, also without creating the usual chalk dust.

Still another very important object of the invention is to provide a device of the character described comprising a removable pad which is adapted to be used as a dust cloth for cleaning the usual chalk racks of blackboards. .l

Other objects of the invention are to provide a cleaning device of the character set forth which will be comparatively simple in construction, strong, durable, compact, light in weight, and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the `accompanying drawings, wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in rear elevation of a cleaner constructed in accordance with the present invention.

Figure 2 is a view in side elevation thereof.

FigureS is a view in front elevation of the device with the cover removed.

Figure 4 is a vertical sectional View, taken substantially on the line 4-4 of Figure 3.

Figure 5 is a View in front elevation of the board.

Figure 6 is a view in horizontal section through the board, taken substantially on the line 6-6 of Figure 5.

Figure 7 is a perspective view of the removable pad.

Figure 8 is a perspective View of the removable cover.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a substantially rectangular board I of fiber or other suitable porous material, which board may be of any desired dimensions. Fixed on the backof the board l are marginal reinforcing strips 2 of wood. Also mounted on the back of the board I is a handle 3 of suitable Wood, said handle being secured by bolts 4. Mounted on the upper and lower end portions of the board I, also on the back thereof, are buttons or the like 5,the purpose of which will be presently set forth.

Removably mounted on the front of the board I is a laminated pad which is designated generally by reference character 6. The pad 6 includes any desired number of plies or sheets of suitable fabric 1 which are stitched vertically on a tape 8. The end portions of the tape 8 extend beyond the fabric plies 1 to be wound on the buttons 5 for detachably securing the pad (i in position on the board I. It will thus be seen that the side portions of the plies 1 are free to be folded on the tape 8 whereby any of the surfaces of said plies may be readily brought to the front for use. The pad 6 and the board I are impregnated with a suitable chemical to facilitate cleaning and to prevent chalk dust.

A removable protective shield 9 is provided for the pad 6. The shield 9 includes a plate IU of wallboard or other suitable material having secured on the back of its upper marginal portion a reinforcing strip II of Wood. Secured between the strip Il and the plate Il) are resilient clips I2 for engagement with the back of the board I for removably securing the shield 9 in position. An opening I3 is provided in the upper portion of the shield 9 to facilitate hanging the assembly on a nail or hook.

`It is thought that the manner in which the device is used will be readily apparent from a conideration of the foregoing. Briefly, the shield 9 covers the pad 6 and preserves the chemical in said pad and in the porous board I. To use the device as a blackboard cleaner, the shield 9 is removed for exposing the pad 6. The operator grasps the handle 3 and the chemically treated pad 6 is rubbed over the surface of the blackboard to be cleaned in an obvious manner, As hereinbefore stated, the fabric plies 'I of the pad 6 may be folded on the tape 8 for presenting either surface of any of said plies for use. By removing the pad 6 from the board I, the usual felt blackboard erasers may be cleaned by beating said erasers on said board, Also, the pad E, when removed from the board I, may be conveniently used as a dust cloth for cleaning the chalk racks of the blackboards. When the device is not in use, the shield 9 is mounted thereon over the pad 6 and hung on a nail or hook which is engaged in the opening I3.

It is believed that the many advantages of a blackboard, et cetera, cleaner constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction may be resorted to which will fall Within the scope ofthe invention as claimed.

What is claimed is:

In a blackboard and eraser cleaner, the combination of a rectangular board having a central hand grip rigidly secured on one face thereof, a laminated blackboard-cleaning pad disposed on the other face of the board, said pad comprising a plurality of similar unbroken sheets of fabric of the same size and shape as the board and permanently secured together along and only along their longitudinal median lines, and means detachably securing the pad to and only to the ends of the board at points coincident with the longitudinal median lines of the sheets and the board.

SPURG-EON l5. HARTER.

Images