US2145142A

US2145142A - Eraser attachment for typewriters

Info

Publication number: US2145142A
Application number: US215701A
Authority: US
Inventors: Stout Frederick William
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-06-24
Filing date: 1938-06-24
Publication date: 1939-01-24
Anticipated expiration: 1956-01-24

Description

Jan. 24, 1939.

' F. w. sTou-f ERASER ATTACHMENT FOR TYPEWRITER S Filed June 24, 1938 INVENTOR BY 3 5 ATTORNEY Patented Jan. 24, 1939 UNITED STATES PATENT] oFFIca nlmsna ATTACHMENT FOR TYPEWRITEI/ES Frederick William Stout, New York, N. Y. Application June 24, 1938, Serial No. 215,761 4 Claims. (01. 24c--20c) Thisinvention relates to new and useful improvements in an eraser attachment for typewriters.

The invention has for an object the construction of an attachment which is characterized by a vacuum rubber cup adapted to be pressed into position upon the side of a typewriter, or desk, or other article of furniture, and automatically to .maintain its position thereon. In conjunction with this vacuum rubber cup it is proposed to characterize the attachment by a chain or cord or other similar support, connected with the vacuum cup and with an eraser for holding the eraser so that it is readily accessible for use.

Another object of this invention resides in so constructing the attachment that it may easily be removed from the side of a typewriter or the desk or other furniture, without marring or inluring the-parts from which it has been removed.

Another object of the invention is the construction of a device as mentioned which is simple and durable and whichmay be manufactured and sold at a reasonable cost.

Fur further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming'a material part of this disclosure:

Fig. 1 is' a perspective view of an eraser attachment for typewriters constructed according to this invention.

Fig. 2 is a side elevational view of Fig. 1.

Fig. 3 is a fragmentary enlarged sectional 'view showing specifically the details of the suction cup.

Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 3.

Fig. 5 is a similar view to Fig. 3 but illustrating another form of the invention.

The eraser attachment for typewriters, ac-

cording to this invention, includes a typewriter eraser l0 supported on a bracket II. This bracket comprises merely a strand of wire bent at its center H and having its free ends ll engaged through the conventional central hole ll) of the typewriter eraser. on the end of a chain I! by a connector l3. This connector is attached to the lower end of the chain and is formed with an opening l3 through which the bracket ll extends.

The chain 12 has another connector l3 at its upper end which engages upon a hook l4 supported on a vacuum rubber 'cup l5. This vac- The bracket II is supported uum rubber cup has a concave front side l5 which may be pressed against a smooth fiat surface to expel the airso that the rubber cup maintains its position under the weight of the atmosphere. I

The hook. I4 is threadedly engaged upon the outer end of a stud l6 which is molded into the rear end portion ofthe vacuum cup I5. A small air passage l'l extends from the curvedsurface l5 through the middle of the rubber cup and the middle of the stud l6, Atone point along "the length of the stud thereis aradially extending branch passage I! which is alignable with a passage Il formed radially inthe shank portion of the hook M in one turned position thereof.

The arrangement is such that when the hook I4 is normally tightly engaged on the stud I6 the passages Fl and ll are out of line with each other and so the air connection from the interior of the rubber cup withthe atmosphere is incomplete.

The vacuum cup I5 is formed with a radially inclined annular face l5 This inclination increases the gripping quality of the suctioncup which is especially important when the cup is attached to other surfaces than glass.

The eraser attachment for typewriters is used as follows: I

The cup I5 is merely pressed against the side of a typewriter or the side of a desk so thatit automatically maintains its position. The eraser It may be used whenever required. To remove the attachment it is merely necessary to break away the vacuum cup l5 from the article upon which it is mounted. If the hold is too tight the hook l4 may be turned so that the passages Il and ll align with each other. This immediately releases the vacuum within the cup and the cup may easily be removed from its position.

In Fig. 5 the threaded-member I4" is provided with a hexagon flange l4 for turning same. Member I4" is also threaded on the outside to permit a lock nut I4 to secure a suitable conhector of an eraser holding chain or cord, to be While I have illustrated and described the 5 preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed'and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. An eraser attachment for typewriters, comprising an eraser, a bracket for releasably supporting said eraser, a chain attached at one end to said bracket, a support member attachedon the other end of'said chain, a vacuum rubber cup for engagement on a smooth surface, a stud molded into the material of the cup and having a projecting shank upon which said member is mounted, and an air passage extending from the,

inner face of the vacuum cup through said stud and connecting with a radial passage alignable with a passage in said support member, in a certain turned position thereof.

2. An eraser attachment for typewriters, comprising an eraser, a chain having said eraser mounted on one end threreona vacuum rubber cup mounted on the other end of said chain for engagement upon a smooth surface of said typesaid radial air passage in a certain turned posiair passage extending to the exterior of said' shank portion, said support member being formed with a radially extending passage alignable with tion of said support member to permit air to enter the hollow of said cup to release the holding action of said cup.

3. In a device of the class described, a vacuum rubber cup for engagement upon a smooth surface, a stud molded into thematerialv of said cup and having a projecting shank portion, a support member rotatively engaged upon said shank portion, and an air passage extending from the inner face of said cup through said stud into said shank portion and connecting with a radial air passage extending to the exterior of said shank portion, said support member being formed with a radially extending passage alignable with said radial air passage in a certain turned position of said support member to permit air to enter the hollow of said cup to release the holding action of said cup.

4. In a device of the class described, a vacuum rubber cup for engagement upon a smooth surface, a stud molded into the material of said cup and having a projecting shank portion, a support member rotatively engaged upon said shank portion, and an air passage extending from the inner face of said cup through said stud into 'said shank portion and connecting with a radial air passage extending to the exterior of said shank portion, said support member being formed with a radially extending passage alignable with said radial air passage in a certain turned position of said support member to permit air to enter the hollow of said cup to release the holding action of.said cup, said support member being threadedly engaged upon said shank portion for permitting said support member to be rotated upon said shank portion to align said radial air passages.

' FREDERICK WILLIAM STOUT.