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Publication numberUS2431156 A
Publication typeGrant
Publication dateNov 18, 1947
Filing dateJan 16, 1946
Priority dateJan 16, 1946
Publication numberUS 2431156 A, US 2431156A, US-A-2431156, US2431156 A, US2431156A
InventorsWonders Alvin W
Original AssigneeWonders Alvin W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mechanically actuated fine point eraser
US 2431156 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Nov. 18, 1947. A. w. WONDERS- 2,431,156

MECHANICALLY ACTUATED FINE POINT ERASER Filed Jan. 16, 1946 u Mm , 7 7 nun Patented Nov. 18, 1947 MECHANICA'LLY ACTUATED FINE POINT ERASER Alvin W. Wonders, Gallup, N. Mex,

Application January 16, 1946, Serial'No. 641,433

10 Claims.

The invention as described herein, and illustrated in the accompanying drawings, appertains to novel and useful improvements in mechanically actuated erasers. An object of the invention is to provide means whereby lines, figures, etc., in crowded positions may be readily erased without touching other adjoining lines.

Another object of the invention is to provide an element having a spiral recess in which a, cord type eraser is mounted and means whereby the same may be gradually fed to an erasing position.

Another object of the invention is to provide a case in which is rotatably seated a core having a spiral groove from end to end thereof, a cord eraser seated in the groove and means whereby the eraser may be fed through a pointed end of the case.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is a sectional elevational view of the eraser,

Figure 2 is an elevational view of a core member,

Figure 3 is a vertical sectional view of a casing,

Figure 4 is an elevational view thereof,

Figure 5 is a sectional view on line 5-5 of Figure 3,

Figure 6 is a detail elevational view of a pusher ring,

Figure 7 is a plan View thereof, and

Figure 8 is a detail view of a rubber cord.

Referring now in detail to the accompanying drawing in which the preferred form of the invention is illustrated, the invention as shown consists of three members, a casing II, a core I2 and a cord rubber H3. The casing is cylindrical and at its lower end It tapers at I5 to a reduced opening IS. The core is also cylindrical and is provided with a spiral groove ll extending from the upper end I 8 to the conical terminal I!) through which the groove also extends to the said opening Iii. The member [2 is provided with a knurled head 29 by means of which it may be rotated within the said casing II. The rubber cord [3 is wound in the spiral ll with its terminal 2| projecting through the casing opening [6. Slidably mounted upon the core I2 and over the upper end of said cord I3 is a circular band 22 through which projects a pin 23, one end 24 extending within the band and upon the upper end 25 of the eraser cord, while its other end 26 projects outwardly of the band and seats slidably within an elongated vertical groove 21 formed in the inner surface 28 of the said member I I. Upon rotating 2 the core the spiral will cause the band to move down while the pin 24 will push the cord down, the end 26 seating in said groove 21 will prevent rotation of the band with the said core.

From the foregoing it will be seen that an eraser is provided with a relatively very small erasing surface and by means of which closely associated lines or one line thereof may be erased without touching adjoining lines.

Changes in shape, size and rearrangement of elements such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired, without departing from the spirit of the invention.

Having now described the invention, that which is claimed to be new and desired to be procured by Letters Patent is:

1. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiraL'means for moving the cord down, a casing for the member having a tapered point with an aperture through which an end of the cord is adapted to project, said means consisting of a circular band having a pin seating in the groove above the cord, said casing having a vertical inner groove and said pin also projecting into the last groove, and means for rotating the member to cause the pin to push down on the cord, said second groove adapted to hold the ring against rotation.

2. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral, means for moving the cord down, a casing for the member having a tapered point with an aperture through which an end of the cord is adapted to project, said means consisting of a circular band having a pin seating in the groove above the cord, said casing having a vertical inner groove and said pin also projecting into the last groove, and means for rotating the member to cause the pin to push down on the cord.

3. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral, means for moving the cord down, a casing for the member havin a tapered point with an aperture through which an end of the cord is adapted to project, said means consisting of a circular band having a pin seating in the groove above the cord, and said casing having a vertical inner groove and said pin also projecting into the last groove.

4. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral, means for an end of the cord is adapted to project, said.

means consisting of a circular band.

6. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral, means for moving the cord down, and a casing for the member having a tapered point with an aperture through which an end of the cord is adapted to project.

7. The described eraser comprising a cylindrical member having a spiral groove therein and erasing means mounted in the spiral, means for actuating said erasing means, and a casing for the member having a tapered point.

8. The described eraser comprising a cylindrical member having a spiral groove therein and erasing means mounted in the spiral, means for moving said erasing means down, and a, casing for the member.

9. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral, and means for moving the cord down.

10. The described eraser comprising a cylindrical member having a spiral groove therein and a rubber cord mounted in the spiral,

ALVIN W. WONDERS.

Non-Patent Citations
Reference
1 *None
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6056162 *Oct 28, 1998May 2, 2000Spectronics CorporationSelf-contained service tool for adding fluorescent leak detection dye into systems operating with pressurized fluids
Classifications
U.S. Classification15/433, 222/390, 15/424
International ClassificationB43L19/00
Cooperative ClassificationB43L19/0012
European ClassificationB43L19/00A2