US834783A - Eraser. - Google Patents

Description

PATENTED OCT. 30, 1906.

W. H. WEGUELIN.

ERASER.

APPLIoATIoN FILED uns, 190e.

WALTER HENRY WEGUELIN, 0F CRIGKLEWOQD, ENGLAND.

,EnAsE'm specification of Letten Patent.

Patented Toca '30, 190e.

Application liled-P0b!\1&ry,5,l906. Serial No. 299,642.

To all whom it may concern:

'Be it known that I, WALTER HENRY WE- GUELIN, a subject of the King of Great Britain and Ireland,I residingv at 8 vAstley avenue, Cricklewood, in the county of Middlesex England, have invented certain new and useful Improvements in or Connected with Erasers; and I do hereby declare the following to be a full, clear, and exact description of the invention, s uch as will enable others skilled in the art to which it appertains to make and use the same.

This invention for improvements in or\con nected with erasers has lfor its object to provide mechanical means for rotatin a pencil or stem eraser on its own axis whi e pressed against the part to be erased and it consists in inserting a thin cylindrical eraser in a spring-holder on a spindle mounted in a frame and adapted to be rotated by means of an Archimedean screw or helical groove and a sliding cap that can be slid over the spindle bypressure and is returned tov its initial position by a spring. In using the device for, say, erasing a single letter in a typewritten document while on the t e-wrlter the frame is placed on the impression-cylinder or pad with the eraser'immediately over the letter to be erased, the s ring-holder insuring that the eraser sha always press against the letter, and the frame is held by, say, two fingers and thesleeve rapidly depressed and released a few times by the thumb, giving the eraser a rapidl rotary movement and erasing the required letter without aiectin the adjacent matter. .f The eraser may be ru ber, a piece of steel roughed at the end, or any other suitable abrasive material. The use of the eraser is of course not limited to type or other letters, but can be used generallyfor example, erasing a small part of a drawing. n

In the accompanying sheet of illustrative drawings, Figure l is a side elevation of an eraser' constructed according to this invention, and Fig. 2 is a longitudinal section with the operating knob or handle depressed.

l Fig. 3 is a detail view of the lower part ofthe device.

The frame comprises the two feet a, connected to the boss o, carrying the sleeve 'b and short bearing c. The spindle d is mounted to rotate in the bearing c, but prevented from moving longitudinally by collars c', and is provided at its upper end with a pin e. A tube f, provided with a cap g, slides within the sleeve b, and fixed within it is a `helical strip h, that engages with the pin e.

A helical sprin 'L surrounds the spindle d and inner part of t e bearing c and bears against the boss o and the cap g. It will readily be seen that on pressing the ca g downward from the osition shown in Fig. 1 to that shown in 1g. 2 the spindle d will be rotated and that on releasing the cap the helical spring 'i will again force the ca upward to t e position shown in Fig. 1 an Athe spindle will be again rotated, but in the opposite direction.

The holder for the pencil-eraser consists of the screwed sleeve l, provided with a slot m. The sleeve Z fits loosely on the end of the spindle d vand is retained in place by a pin n passing through the slot; A helical sprin ears against the boss o and an adjustailld nut q on the sleeve l, and thus tends to force the sleeve Z outward. As shown in Fi 3, the spring 1p is inclosed by a sleeve m, w ich is preferab y xed on the nut g, a suflicient space being left between the top of the sleeve land the boss o to allow of the desired compression of the spring. A plug t, Fig. 3, is adapted to slide in the sleeve Z and is retained by a in fv andcan be forced downward by the a'ustable nut w, working on the sleeve l and earin on the' pin fv. The eraser A fits in the en of the sleeve and bears against the end of the plug t and can thus be fed outward as it wears.

In using the apparatus, say, on a type-- writer to erase a letter without removing the paper the device is placed with its two feet 1n ine on the im ression-cylinder and, with the eraser imme iately over the letter or character to be erased, and as the eraser is pressed lightly, but firmly, down the sleeve l slides upy the spindle d with the eraser forced lightly against the paper by the spring p. The ca g is now alternately depressed and release a few times, causing the eraser to be ICO rapidly rotated in opposite directions on its ing at its lower end, a spindle to rotate in said bearing and to extend through saidl cylinder, an inner cylinder telescoping into the outer one, a spirally-twisted strip forming a helical groove, said strip being xed in the outer end of said inner cylinder and adapted to surround and slide upon the upper end of said spindle, a pin upon said spindle to work in said roove, a coil-spring Within said inner cylin er surroundin said spiral strip, said spring being confine 4between the lower end of the outer cylinder and the upper end of the inner cylinder, and means for mountin an eraser on the projecting end of said s ind e.

- 2. An eraser of the character escribed comprising an outer cylinder having a bearing at its lower end, a spindle to rotate in said bearing and to extend through said cylinder, an inner cylinder to telescope into the outer one, a spirally-twisted strip forming a helical groove, said strip being xed in the outer end of said inner cylinder and adapted to surround and slide upon the upper end ofsaid spindle, a pin upon said splndle to work in said groove, a coil-spring within said inner cylinder surrounding said spiral strip, said spring being conined between the lower end of the outer cylinder and the upper -end ofthe inner cylinder, s aced suppolrting-feet projecting from sai outer cy der, an externally-threaded sleevehaving a limited sliding movement upon the lower projecting end of said` spindle and provided with longitudinal slots, a spring for moving said sleeve downwardly u on said'spindle, a follower mounted to sli e in said sleeve and to engage an eraser therein, a pin rojectiug from said follower and slidable in ongitudinal slots in said sleeve, and a nut upon the threaded portion of said sleeve to engage said pin and actuate said follower. 4,

3. In aneraser of the character described a body; a spindle therein, means upon said body for rotating said spindle an 'externallythreaded .sleeve having a limited slidin movement upon the projectin end of sai spindle and provided with longitudinal slots,

a spring for forcing said sleeve downwardly upon said spindle, .spaced supporting-feet carried by said body, a follower slidable in said sleeve for engagement with an eraser therein, ins projecting from said follower and slida `le in slots in said sleeve, and a nut upon the threaded portion of said sleeve and engaged with said in.

In testimony w ereof I have aflixed my signature in resence of two witnesses.

WALl ER HENRY WEGUELIN. Witnesses:

ALFRED NUTTING, R. F. WILLIAMS.

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