US1661111A - Automatic eraser - Google Patents

Description

Feb. 28, 1928.

H. G. COY

AUTOMATIC ERASER Filed Jan. 18. 1927 INVENTR. HmrG. Cqr

i ATTORNEY.

4 4 3 w u7/ fl//M/ i Patented Feb. 28, 1928.`

` E TAT Es IOMER G. cot on NEW YORK; N.` Y.

i Amom'rc nmen.

a Application me& January s; 1921; Serial no, 161399.

'This invention relates to eresers, more particularly to an e'raser' of the power operated type,` and has for'its object to pro-` Vide,` in mmanner as herenafter set forth, a device of the t pe referred to including an erasing or ibra ing element capable'of having a vibratory action imparted to` a` portion thei-cof to provide an erasive action to quickly and eflicientlyremove ink or pencil lines 01' ink or pencil markings or other mrkings to be eresed. i

Further objects of the invention are to provide, 'in 21; mnner as herein'after ;set forth, an eraserwhich is simple `in"its-construction :and arrangement, "strong, compaet, durable, thoroughly eflicieit in its use;

Conveniently thrown into "active position, readily pensive to manitfaeturei i\ With thefregoingefd otherobjects in View the invention consistsofthe novel; construction, coiibnation `and arrngeinent of parts es herei'nefter more fspecificlly de`- scribed and illustrated in the accompanying drawings,` W'herein is shown an "emb diment of the invention, but it is to be un" erstood that changes, varitions and" modifieations can be resorted to whih fall "within` the scope ofthe olains'` hereunto appended. "In the drewings"w hereinflike" reference bharacter's "denote` corresponding parts throughoutthejseveralviewsz ;ing accordance with this` intention, in maetive position and nounted upon a`snp`portl" `'l`ig`uref2 is affragnentary View in `lon"- gtlidinal section illustrating the erasingor abrading element carrier.` 4

Figure 3 is a section on line 3-3 Figure 2. Fgure t is a section on line4-4 Figure 2. An eraser, in &cool-dance with this inven- V tion includes a` vibi'atoryerasing or brading element, a 'nanually ortable carrier or holder therefor, and an eleetrically operated combined fluid i pressure snpply 'and suction mechanism to provide "for the Vib 'etionbf 'the erasing or abradin element to set up n erasing function `for t e letter. A The carrier or holder for theterasing or abradng element consists of a bodyportion 1, of appropriate length so thtftcan be `grasped by the hand and held or shifted to the desired position andpreferahly the body assenbled and" conparatively inexi Figur-e 1' is a front eleYa ionfofhniei'ser portion 1 is of eirclar cross section.` The body portion 1"at"fits lower orginnaend is` of tapered contourasindicated at The body portion 1 is formed with lengthwise extending eentrally disposed bore 3 which eorrespondsin eonto'ur to the sha e of the eresin or `abrding"element 4, which is noL j istabl y mountcd in "position and `e'na`-` nently set to project af sib'stgntial distance from the lowerend of the body portion 1. The abredng element is eonstructed of any suitable "mterialfsuchhas rubber `pos:` sessing a eharacteristic to set" up n ibrasive or erasiveaetion when the "deviceisused The bore' 3 `extends" from one `end to the other end ofjthe bodyfportion 1 and has its jnneor loWerporti0n "enlzrg edges et 5.

The jenlajged innerterminal portion 5 of the bore `3 `projects hiterally in one direction, withrespect to'thereniai'ing portion of the bore 3; and is disposed diametiolly of the carrier or holdr. The portion"5 of the bore 3 provide s a eleerance to permit of theiinner or lower terminal portion 6; of the element 4, to't hrate." The npper or outer"`en d` of "said bodyportionl, is provided` with `a nipple 7 which forms acontinuation ofe channel 8 extendinglengthwise ofthebody porlLlQIE I i i" i The channel 8^is a combined fl idpres suresupply and section passage endet its inner end ternintes in theoterendof a i i i i. i i e 8 port 9"disposed danetreally ofrthe body I `porti`m1.` The inner end. of the port 9`is portion 1;

i he element& i ad istby &wanted in 9 the body portonl 'to enable it tobe adjusted to extend the*desired` distance fronithe "inner or lower. endet thegbody portion 1 :js

theinner or lowerendcthereof wears away.

"l `he element`4 is Secured in adjusted positions by ediz netrieally disposed set screw 10` having threaded engagement with the body portion 1,` and with its inner endfebut- .ting againstielementjto clamp it i`n` a d "justed position against the Wall ofthe bore 3. Attached to the body` portionfl:` is &

bail 11 'tor hanging the carrier or holder up and further for normally maintaining a spring controlled circuit Closer, to be pres ently referred to, in inactive position.

,The electrically operated mechanism to provide a vibratory action to the inner or lower projecting end of the element e includes a'fieXible, combined fluid pressure supply and suction pipe 12 which is 'connected to the nipple 7. The said mechanism further includes a pump 13 mounted within a casing 14 and operated ;from an electric motor 15 which is also arranged in the casing 14. The pump 13 includes a cylin-. der 16 having an air supply port 17 intermediate its ends and a combined air discharge and suction port 18 at its lower end. The cylinder 16 forms a piston chamber 19 in which operates a piston 20 to provide for alternate fluid .pressure supply and suction steps with respect to the inner or lower terminal portion 5, of the element 1 thereby causing said terminal portion -to vibrate, on the operation of 'the pump, to set up the erasing or abrading function for theelement ,4. The pipe 12 is ,connected to the casing 14 and opens into the port 18.

The position of the port 17,' in the cylinder 20, is such that the port 17 will be cleared by the piston at the 'limitet the upstroke ot the pis'ton, the latter then descends past the port 17 and forces the air beneath it through' the port 18, pipe 12, channel 8 and port 9 against the inner ;or lower terminal portion 5, of 'the element 4, causing it to move away 'fromtheinner end 'of port 9. The pistonthen rises and creates a suc ton action back through port 9, channel 8, pipe 1-2 and port 18. This back suction, to'- gether with the resiliency of element 1, causes the inner or lower terminal portion 5 oi' the latter, to move back 'to its original position closing the inner end oi port 9. The piston continues to rise until it clears port 17, which again admits air to' the piston chamber beneath the piston and the descending operation of the 'pisten is repeated. In Figure 1, the piston is shown in full lines, just before it reaches'the limit of its upstrokeand in dotted lines just before it reaches the, limit of its downstroke.

The circuit connectionsfor the motor 15, are indicated at 21 and which includes a contact 22 and 'a spring controlled cireuit closer 23, normally maintained clear of the contact 22, by the hanging ot thecarrier or holder 1 on the closer 23; When 'the carrier or holder is removed from the circuit closer so that the carrier or holder can be shifted to any pointdesired. On the operation of the pump it will provide for a Vibratory movement at the inner or lower terminal portion 6 of the element 4, so the said element 4: will perform its erasing or abrading action.

It is thought'the many advantages of an can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to he understood that changes in the details of construction can be had which will tall within the scope of the invention as claimed.

What I claim s:- 1. An eraser comprising an erasing'ele ment carrier including means toprovide for the alternate application of fluid pressure and suction directly 'upon-a terminal portion of said element to vibrate such portion, and a pumping element having an air intake and further having axcombined air discharge and suction port communicating with said means;

'eraser, in accordance with this invention,

2. An eraser comprising a manually portable erasing element carrier ;including means to provide for the alternate applcat ion of fluid ,pressure and suction directly upon an' end terminal portion, of said element to vibrate such portion, a pumping mechanism a having an air intake and afcombined air -discharge and suction port communicating with said means, a'nd an electricmotor .normally in an open circut, said motor operatvely connected with said pumping mechanism and Operating the same When the motor circuit -is closed. I

3. An .eraser comprising an adjusta'blje erasing element, a ortable ca rrier therefor, said carrier including means top'rovde for the 'alternate application of fluid ,piressure and suction directly uponan end terminal portion of said element to vibrate such por tion, and a pumping element havingan air intake and a combined air dischargeand suction port communicating with said means, said carrier further including means :tor maintaining the erasing element in adjusted positions.

1. An eraser, comprising in combinaton a carrier provided with a combined fluid pressure supply 'and suction channel and a bore commnnicating intermediate its ends 'with said channel, said bore opening at the ends of the carrier, an erasing element mountedin said-bore, extending through and projecting from the carrier and normally closing the bore 'to said channel,'said bore having an enla'rged 'terminal portion to' permit of the vibration of that part ofsaid element projecting from the carrier, and a pumping device having an air intake and a combined air discharge 'and suction port communicating "with said 'channel to cause llU an alte'nate application of fluid pressure and suction directly upon that portion of said eraser element extended from the carrier to Vbrate such portion.

5. An eraser construoted in accordanoe With claim 4, said pumping device including a flexible pipe nterposed between and opening into said port and channel.

6. An eraseconstructed in accordance Wi th claim 4, an eleotriomotor normally in an 10 open circuit and having an operative drive connection Withsaid pumping device for operatng the latter when the motor circuit is closed. n i

In testimony whereof, I aflix my signature hereto.

HOMER G. COY.

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