US1667431A

US1667431A - Eraser cleaner

Info

Publication number: US1667431A
Application number: US205239A
Authority: US
Inventors: Frederick B Meyers; Harry W Darney
Original assignee: REGINALD BRAGONIER
Current assignee: REGINALD BRAGONIER
Priority date: 1927-07-12
Filing date: 1927-07-12
Publication date: 1928-04-24
Anticipated expiration: 1945-04-24

Description

section Patented Arm-. 24, 1928.

FREDERICK IBQMEYERS AND HARRY W. mnmwormmmom humm r As sxcavons or QNEQHALF TO manure Baaeomm; orflnammonn; AR LAND.

d NEBASER (momma; xii

or other soft rubbing face of the, eraser abe-v iing thereby caused to fly out intoithe; open air so that it. is exceedingly apt to be breathed by theperson cleaning the eraser and :by other pupils, Orl -persons inthe room. This method is obviously unsanitary and .un} healthful, and it is the object of the present invention to providea siniple and'inexpens i re device whereby blackboard ierasers, may be very effectually and rapidly oleaned and the dust confined s o thatit will. not blow a bout-and cannot contaminate the .air ithin the school room. The .objectofthe invention is attained in such a device as .is illustrated in the .acco1npanying drawing, andthe invcntion resi'desln-certain novel features wh ch p g rated .thereh'on'ig Below the scraper a will be hereinafterfirst fully described-and then more particularly defined theap- I r box to restupon the bottom ofthe same and one end of this tray or draweris provided with a head .l8yfitting. closely Within an "opening provided therefor in the end ofthe pended claims.

In the drawing; o. U Figure 1 a central vertical longitudinal of an eraser cleaner embodying our invention-y v I f Flg. 2 is a transverse section on thenh ne of Fig. 1. and i Fig. 3 is a detail plan view .ofthe grating or scraper by the .action of which the dust is loosened tronithe eraser. I p

In carrying out the invention, there is provided a container comprising" a box 'or body 1 of oblong form which is adapted to be firmly secured upon a .supporgthe (llflWlng'SliQWlllg the box as provided with a base 2 having its edge. -pO1t10l1S. P1fO]GOt111g' beyond the sides and ends of the box and formed with openings 3 therethrough rqr the I v I theacontamer :below a plunger 18 so'that- 1 insertion of screwsror otherfastening devices intoany convenient fixed support. The container also includes a cover 4 which is .con-

.nected by hinges -h at one side to the top. of

the boxand at the other "sideisheld closely thereto "by a claspfi of any approved type, the cover being thereby held firmly to the box so that thedust from the eraser-ivilhbe held within the box and cannot escape into the open air. ln the sides of thebox above the bottom thereof .are provided cleats or rails T which torin horizontal"guldes ior'a scraper 8 consisting'of anopen tralnefitting rather oloselyrbetween the sides of the box and :provided in its sides with longitudinal eci roca e. The plunger comprises plate 1-8Iandastemorrod19 firmly secured @1927. serial so. 205,239.-

grooves I I ing. edges of the cleats 7, as clearly shown thefrarne 8*islsecured a rod'lO extending '1 therefro1n through an opening Qtherefor in the end of the box and provided beyond the ,box With any convenient of handle 11.;

b b D orm Obviously by grasping the handle 11 ,thescraper. frame ;8 may be reciprocated alongithe cleats 'Zso that the upper edges of. the slats 9 may rub across the sur face of an eraser presented thereto and thereby v so agitate: the surface that it will be spreadsomewhat andthe chalk dustsepa drawer or tray 12 is fitted .closely vvithin the box opposite the handle 11 so that the openng .in :the box, will be closed but the drawer ,or tray maybe easilyv Withdrawnwhen it is desired to remove the dust collectedtherein.

The head provided with aicap plate 14 bearing 'aga nst the outer side of the box laroundgthe opening and this cap plate is equipped with a handle 15 of any convenient A latclrlti may be ,provided to hold the drawer against accidental Withdrawal and a lso tov hold theeap plate .14 :over the .0pening inthe end o'f the box so as to resist leakage of the dust.

theeraser to the scraperv While the latter is thereto and rising therefrom through the $01) of the cover, anexpansion spring 2Q be- Iingco'iled around; the plunger rod or stem 19 between the cover anda knob or. handle 21 [at the upperend of the plungerv rod, as

; The eraser 17. mounted in the cover, of,

aggregate with at roject? 1n 2. Fittedin the open frame are p plurality of transverse slats or blades 9, the upper-edges ofwhioh project slightly above 130 a pressure exerted upon the plungerwill hold shmvnywhereby the plunger will be 11015 mally held in its raised positionand willrelease the eraser when the pressurethereon lhasq'been'. Withdrawal To hold theeraser against movement transversely or; longitudh nally of the cover, the side members of the cover are of such dimensions or so spaced that they will accommodate the eraser between them but will: prevent any excessive movement; laterally of the .craser which would permit it to shift to one side of the scraper. Extending between the side mem bers of the cover is a bar or stationary clamping member 22 against which one end of the eraser may abut, as shown in Fig. l, and in the lower edge of thisclamping member is a notch 23 to facilitate the insertion or removal of the eraser. The opposite end of the eraser is engaged by a movable clamping jaw 24L fixed upon the end of a rod 25 which extends therefrom toward the adjacent end of the cover and is slidably mounted in the inner end wall of a chamber'or case 26, the outer end of said rod being equipped with a piston 27 within said chamber and an expansion spring 28 being housed within the chamber between the piston and the outer end wall of the cover, as clearly shown in Fig. 1, so that the force of the spring is exerted Constantly to project the abument or clamping jaw 22lagainst the eraser and thereby hold the eraser against the stationary clamping member 22.

The use of the device will, it is thought, be clear from the foregoing descriptiointaken in connection with the accompanying drawing. When an eraser is 'to be cleaned, the lid or cover of the box is swung over to open position and the eraser is then inserted between the clamping members 22 and 24: by pressing one end of the eraser against the movable clamping jaw 24 and then pushing the eraser between the two clamping elements. The spring 28 will then hold the eraser firmly between the clamping elements as previously described. The cover is then returned to closed position and pressure is exerted downwardly upon the plunger rod 19 so that the eraser will be pressed against the scraper, and the scraper is reciproc ated by manipulation of the handle 11 and rod 10 in an obvious manner. The upper projecting edges of the several scraper slats 9 will have a beating action upon the surface of the eraser so that the dust collected therein will be loosened and will fall through the spaces between the slats into the drawer or tray 12. The operation of the device for a very short period of time will thoroughly clean the eraser and after one eraser has been cleaned it is removed and another eraser inserted, the operation being repeated until all of the erasers on hand have been cleaned. Vvhile ordinarily the device will be made to accommodatea single eraser, it will be obvious that it may be made in such dimensions as'to accommodate two or more crasers at one time and, of course, may be made in various dimensions according to the sizes of the erasers which are in use.

The device is very compact and is free of complicated arrangements or constructions so that it may be easily manipulated and will not be apt to get out of order. p p I -Having thus described the invention, we claim 1. An apparatus for the purpose set forth con'iprising a container constructed to admit an eraser, means for mounting an eraser within the container, a reciprocablc scraper titted within the container to act upon an eraser mounted therein, means for closing the container around the eraser, and means for pressing the eraser against the scraper.

2. An apparatus for the purpose setforth comprising a container, means for releasably supporting an eraser therein, a scraper mounted 'slidably within the container in position to act upon the eraser andhaving dis charge openings through its bottom whereby dust from the eraser may pass freely therethrough, means whereby an eraser may be a u held against the scraper, means for closing the container around the eraser and the scrap-er, and a dust collector removably fit ted'in the container below the'scraper.

3. An apparatus for the purpose set forth comprising a container, means for mounting an eraser within the container, a reciprocatory scraper mounted within the container below the eraser and comprising an open frame and transverse slats secured in said frame in spaced relation with their upper edges projecting aboveythe frame to impinge upon the eraser, means for closing the container around the eraser and the scraper, and means whereby the eraser may beheld o the scraper.

4. An apparatus for the purpose set forth comprising a container, a scraper slidably 'mounted in'the container, a handle element secured to one end of the scraper and projecting through the adjacent end of the container, yielding means for supporting an eraser over the scraper, means for closing the container around the scraper and the eraser, and means whereby an eraser may be held to the scraper.

5. apparatus for the purpose set forth comprising a container, a reciprocatory scraper mounted therein, a fixed clamping element within the container above the scraper against which an eraser may abut, a movable clamping jaw cooperating with said fixed clamping member to hold an eraser, means for yieldably projecting the movable clamping jaw toward the fixed clamping element, means for closing the container around the eraser and the scraper, and means between the clampingjaw and fixed clamping element to hold an eraser against the scraper.

6. An apparatus for the purpose set forth comprising a container, a reciprocatory scraper mounted in the container, means above the scraper for supporting an eraser,

plunger rod secured to the plunger and ex tending therefrom through the top of the container whereby pressure may be applied to hold the eraSe-r to the scraper, and yieldablemeans acting on the plunger rod to normally retract the same.

7. An apparatus for the purpoee setglorth eoneprieing a container, a reeiproeatory scraper mounted within the container, :1 fixed clamping jaw in the container above the tures.

scraper, a movable clamping jaw cooperatmg with the fixed 'elampmg aw whereby to secure an eraser inserted, between the jaws,

a rod extending outwardly from the movable clamping jawpa pistonon said rod, yieldable means acting on the piston to project the movable clan' ping jaw toward the fixed elan'naing jaw, and means for closing the container around the eraser and the scraper.

In testimony whereof FRED. B, MnYnns. L s.]

HARRY \V. DARNEY. [1,. s.]