US2179902A

US2179902A - Chalk holder

Info

Publication number: US2179902A
Application number: US170499A
Authority: US
Inventors: Solheim Harriet Myrtle
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-10-22
Filing date: 1937-10-22
Publication date: 1939-11-14
Anticipated expiration: 1956-11-14

Description

0v. M, 1939. H. M. SOLHEIM CHALK HOLDER Filed Oct. 22, 1937 2 Sheets-Sheet 1 Afforneus Nov. 14, 13939. H. M. SOLHEIM CHALK HOLDER 2 Sheets-Sheet 2 Filed 001:. 22, 1937 Afforneys Patented Nov. 14, 1939 STATES PATENT @FHCE 1 Claim.

This invention appertains to new and useful improvements in school appliances and more particularly to a holder especially adapted for holding chalk.

As is well-known, the use of chalk in writing or illustrating on blackboards is quite disagreeable as powdered chalk is left on the hands and small particles fall onto the floor and become pulverized thereon. Moreover, small children, after writing with chalk attempt to clean their hands by wiping them on their clothing, thus soiling their clothes. Furthermore, the holding of chalk is to many people offensive in cases where the skin of their fingers is sensitive.

Th principal object of the present invention is to provide a holder for chalk which will eliminate the necessity of actual contact of the chalk with the hands.

Another important object of the invention is to provide a chalk holder wherein chalk can be used until it is practically exhausted,

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 chalk holder showing a piece of chalk protruding from one end thereof.

Figure 2 represents a longitudinal sectional view through the chalk holder with a stick of chalk therein.

Figure 3 is a cross sectional view taken substantially on line 3-3 of Figure 1.

Figure 4 is a side elevational view of the spirally slotted tube.

Figure 5 is a side elevational view of the rotatable tube.

Figure 6 is a side elevational view of the chalk holding clip and slider unit.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numera1 5 represents an elongated cylindrical shell having the small opening it at one end thereof to rotatably receive the neck portion '5 which connects the knob 55 to the head 58 of the elongated rotatable tube it This tube ill is provided with the longitudinally extending slot it through which the stud it extends, this stud 52 also extending through the longitudinally extending spiral slot l3 of the sleeve M. This sleeve M is interposed between the tube iii and the shell 5 and is provided with a longitudinally extending spirally arranged rib it which serves to space the main portion of the sleeve M from the shell by a slit so as to leave the space it in which the head ll of the stud !2 can travel.

One end of the sleeve M abuts the inturned end portion iii of the shell 5 through which end the chalk stick IS projects while the opposite end of the sleeve Hi is provided with the outwardly disposed circumferential flange head 20 which bears against the inside of the shell 5 at the knob end of the shell 5.

The slide block 2i inside of the tube iii and from which the stud l2 protrudes is provided with the spring finger 22 for gripping the inner end of the chalk stick it as clearly shown in Figure 2.

Obviously, by rotating the knob 8, the tube it is rotated and as the stud I2 rides in the slot l3 of the sleeve Hi, the chalk gripping block 2! will move longitudinally in the shell 5, feeding the chalk outwardly to the extent needed.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and material 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:

A chalk holder comprising an elongated shell having one end rounded and provided with a centrally arranged opening through which the chalk passes, the opposite end being flat and provided with a centrally arranged opening, an elongated tubular member fitting in the shell and having one end bearing against the flat end thereof and its opposite end against a portion of the rounded end, said tubular member having a spiral slot therein, a spiral rib on the exterior circumference of the tubular member, said rib engaging the inner circumference of the shell to space the tubular member from the shell, a second elongated tubular member fitting in the first tubular member with its ends engaging the fiat and rounded ends of the shell, that end of the second tubular member which engages the flat end of the shell being closed, a stem projecting from said closed end and passing through the opening in the flat end of the shell, a knob connected with. the outer end of the stem, said second tubular member having a longitudinal extending slot therein extending 45 from a point spaced from the closed end of the second tubular member through the other end, a block fitting in the second tubular member, a headed stem connected with a side portion of the block and passing through the slot of the second tubular member and through the spiral slot of the first tubular member with its head located the space between the shell and the first tubular member, and spring fingers carried by the block for gripping a piece of chalk placed in the device.

HARRIET MYRTLE SOLHEIM.