US2128524A - Eraser - Google Patents

Description

Aug. 30, 1938.

G. H. DAVIAU ERASER Filed April 9, 1957 2 Sheets-Sheet l III/I/l/l/l Inventor 6'1 Jaaz'aee M Attorneys G. H. DAVIAU Aug. 30, 1938.

ERASER Filed April 9, 1937 2 Sheets-Sheet 2 Inventor Attorneys Patented Aug. 30, 1938.

EBASER' George H. Davina, New Orleans, La.

Application April 9, 1937, Serial Nix-136,065

2 Claims.

This invention appertains to new and useful improvements in erasers and more particularly to an electric eraser.

The principal object of the present invention is to provide a convenient implement whereby erasing can be done in the shortest possible time.

Still another important object of the invention is to provide an electric eraser whereby erasing can be done in the shortest possible time and with a high degree of accuracy, eliminating smudging as well as marring or obliteration of work other than that to be erased.

These and various other important objects and advantages of the invention will become apparent to 'the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the eraser.

Figure 2 is a longitudinal sectional view through the structure.

Figure 3 is a side elevational view showing the two main sections in separated position.

v Figure 4 is a side elevational view of the eraser stick.

Figure 5 is an inner end elevational view of the upper section in Figure 3.

Figure 6 is a cross section on the line 6--6 of Figure 2. 1

Figure '7 is a cross section on the line 1-1 of Figure 3.

Figure 8 is a longitudinal sectional view through the eraser. stick.

Referring to the drawings wherein like numerals designate like parts, it can be seen that the eraser consists of the two main sections 5, 6. The upper section 5 consists of the shell 1 having the electric motor therein consisting of the field 8 and the armature 9. Wires l extend from the motor to thecordli which extends through the bushing I! of insulation in the tapered end portion a-of the shell I.

The armature shaft l3 extends into the short barrel H which extends into the cap member l5,

this cap member being provided with the threaded reduced portion i disposed into the internally threaded end portion ll of the shell I. A plate l8 of suitable material is secured to the cap and into this partly extends the said barrel H. The armature shaft l3 terminates in a serrated end in the barrel H and meshes with the serrated end of the, stub shaft l8 which extends upwardly from, and is secured to the upper end of the barrel 20, the lower portion of this barrel, and in fact the major portion of the same being of polygonal cross section to accommodate the polygonal shaped stick 2! which containsthe eraser strip 22. This eraser stick 2] can be sharpened as an ordinary wooden pencil for exposing the strip 22.

Surrounding the barrel is the sleeve 23 flanged outwardly at its upper end as at 24 and to this is secured the cap 25. The annulus 26 is interposed between the plate i8 and the cap and has an opening 21 therein whereby access may be gained to the set screw 28 which connects the collar or flywheel 29 to the barrel 2|. This set screw permits disconnection of the barrel 2! from the upper section.

A pivotal dog 39 on the lower end of the sleeve 23 can be moved to bite into the stick 2i to retain the same in the desired adjusted position extending from the barrel 20.

Numeral 3! denotes a switch in the section 5 for starting and stopping the motor.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is:-

1. An eraser or the class described comprising a shell, a cap closing one end of the shell, a motor in the shell, a shaft driven from the motor and extending into the cap, an elongated sleeve, a casing connecting the inner end of the sleeve with the cap and said casing including spaced supporting members, a barrel passing through the sleeve and into the casing and rotatably arranged in said spaced supporting members, means for connecting the inner end of the barrel to the motor shaft and a flywheel forming collar detachably connected with the barrel and located between said spaced supporting members.

2. An eraser of the class described comprising a shell, 9. cap threaded in one end of the shell, a motor in the shell, a shaft driven from the motor and extending into the cap, a sleeve, 8. flange at the inner end of the sleeve, a supporting member connected with the flange, an annulus connectedwith the supporting member, a secondsuppcrting member connected with the annulus, said supporting members extending transversely, the second supporting member being connected with the cap, a barrel passing through the sleeve and rotatably arranged in the supporting members, a collar located between the supporting members and encircling the barrel, a screw for fastening the collar to the barrel, said annulus having an opening therein permitting access to the screw, a sleeve passing through the cap and enclosing the motor shaft, and a stub shaft connected with the inner end of the barrel and clutch means between the adjacent ends of the two shafts.

GEORGE H. DAVIAU.

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