Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS613501 A
Publication typeGrant
Publication dateNov 1, 1898
Filing dateDec 28, 1897
Publication numberUS 613501 A, US 613501A, US-A-613501, US613501 A, US613501A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Erasing attachment for type-writing machines
US 613501 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

No 6|3,50|. Patented Nov. I, I898. J. H. DICKINSON.


(Application filed Dec. 28, 1897.)

(No Model.)





SPECIFICATION forming part of Letters- Patent No. 613,501, dated November 1, 1898.

Application filed December 28,1897. Serial No. 663,920. (No model.) I

To all whom it may concern.-

Be it known that I, JOSEPH H. DICKINSON, a citizen of the United States of America, residing at New Orleans, Louisiana, have invented an Erasing Attachment for Type Writing Machines, of which the following is a specification.

The object of my invention is to provide a type-writing machine with an attachment whereby errors in type-writing, more particularly' of single characters, may be quickly corrected by erasure while the paper remains in position on the machine.

In the drawings I have illustrated a typer5 writing machine of the Remington type-bar construction; but it will be understood that my invention may be applied to various other constructions or styles of type-writing machine.

The principal feature of my invention consists in the combination, with the impression platen or roller, of an erasing device and means for bringing the two into operative conjunction that the impression of a wrongly- 2 5 printed character or characters on the paper carried by the platen can be quickly erased without raising the carriage, as is commonly done.

The erasing device may be an india-rubber 0 one, a brush, or any other suitable eraser. For convenience I prefer to make it in the form of a disk mounted upon a rotary shaft. The erasing device will, in the Remington and like machines, be mounted at a point just below but slightly forward of the platen that is, toward the operator-and just beyond the forward edge of the inking-ribbon. To bring the platen and erasing device into operative relation when an erasure is to be made, various devices maybe employed, and either the platen may be moved toward the erasing device or the erasing device may be moved up to the platen. In the latter case it will be necessary, in the Remington and 5 like machines, to move the inking-ribbon out of the way at the same time that the erasing device is moved up to the platen.

The erasing device may receive its rotary or other erasing motion by any suitable means,

either independently of or in conjunction with the means employed to bring the eraser and platen into operative relation to each other.

In the accompanying drawings I have shown my invention as embodied in a form in which the platen is to be moved up to the eraser, which has a rotary disk mounted upon a shaft in fixed bearings. The erasing moti0n-in this case rotary'is imparted to the eraser by meansindependent of the devices which bring the platen up to the eraser.

Figure l is a vertical section of sufficient of a type-writing machine to illustrate the application thereto of my invention. Fig. 2 is a pla'n'view, and Figs. 3 and 4 are'separate views of details drawn to a larger scale.

In the drawings, A is the frame of the machine, which, as I have said, may be of any suitable construction, and B is the traveling carriage, which in this instance is shown as made in two parts one, b, traveling on the fixed guide-rail R, and the other, b, hinged by means of links I) to the part b, so as to be free to swing toward and from the operator upon the movable guide-rail R. This movable guide-rail is carried on the upper end of hinged levers E, controlled by one or more shift-keys K, through a link or links is, to move the platen to change from lower-case to up per-case, as usual. 86

In the illustrated application of my invention I provide for an additional or further movement of the swinging carriage and platen forward toward the operator to bring the printing-line of the platen forward clear of the inking-ribbon and into operative relation to the eraser G. For this purpose I provide an additional arm or arms 6 on one or both of the levers E, which carry the movable rail R. I connect such arm or arms 6 by means of a 90 link or links it to a shift key or keys K, which when depressed will give the desired forward movement to the movable part of the carriage and the platen. I provide for normally retaining the platen in the central position shown by full lines in Fig. l-that is, the lower-case position-by a spring-catch connection between the levers E and the upper plate of the frame A. In the drawings I have shown the spring-catches F as carried by the levers E and adapted to engage with notches f on the frame. The construction, however, is such that upon pressure being applied to one of the shift-keys the spring-latches will yield and allow the carriage to be moved either to the back position for the upper-case or the forward position (shown by dotted lines in Fig 1) for erasing. Springs S and S are provided in conjunction with the levers E to tend to return the movable part of the carriage and platen to the normal central posit-ion. (Shown by full lines in Fig. l.)

The erasing device is shown in the drawings as in the form of a disk of rubber G or with a rubber periphery mounted upon a spindle or shaft g, which in this case is shown as mounted in fixed bearings in the frame parallel with the axis of the platen. The spindle has preferably at each end a pinion g, gearing into a toothed wheel 9 with a crank-handle by which rapid rotary motion may be imparted to the eraser. As shown in Fig. 2, the eraser is preferably arranged just to the left of a line passing from the front to the back through the printing-point, so that the character which has just been impressed upon the paper will be immediately opposite the erasing-wheel and by a touch of the eraser shift-key K the platen will be moved forward to bring that impressed character over the erasing-wheel, and as the latter is rapidly rotated it will erase the printed impression. A typographic error through the striking of a wrong character can thus be quickly erased, and the carriage can then be moved back in the ordinary manner to make the correct impression.

I claim as my invention 1. A type-writing machine provided with an erasing device adjacent to the platen, means whereby the two may be brought into and out of operative relation, and means for imparting erasing motion to the said device, as and for the purpose described.

2. A type-writing machine having a. movable platen, an erasing device, and means whereby the platen may be moved over into operative relation to the erasing device, as and for the purpose described.

3. A type-writing machine having a platen and a rotary eraser adjacent thereto, in combination with a device for moving them into and out of operative relation to each other, and means independent of the said device to rotate the eraser, substantially as described.

4. A type-writing machine having an erasing attachment, a movable platen and a shift key or keys for moving it into the upper and lower case positions, an additional shift-key to move it forward with its printing-line beyond the edge of the inking-ribbon and into operative relation with the eraser.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5813681 *Apr 17, 1996Sep 29, 1998Graco Children's Products Inc.Child walker
Cooperative ClassificationB41J11/60