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Патент USA US2128115

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Aug. 23, 1938.
l. B] EN
Filed Aug. 17, .1937
Patented Aug. 23, 1938
Israel Bien, San Francisco, Calif.
Application August 17, 1937, Serial No. 159,581.
1 Claim.
This invention relates to improvements in
sharpeners and has particular reference to a
sharpener for chalk, such as, tailor’s chalk.
The principal object of this invention is toproduoe a simple, inexpensive device which may be
carried in the pocket and used when desired.
A further object is to produce a device of this
character which will sharpen the chalk but Which
will not wear out the pocket of the user, or will
10 it injure the ?ngers thereof.
Other objects and advantages will be apparent
during the course of the following description.
In the accompanying drawing forming a part,
of this speci?cation and in which like numerals are employed to designate like parts
15 throughout the same,
Fig. 1 is a side elevation of my device, ,showing the same in use;
(01. 120-90)
screws 1. Secured between the blocks 5 and 6
are plates 8 and 9, Which plates have their upper
margins eXtending beyond the margin of the
blocks and spread, as best shown in Figs. 2, 3,
and 5 These plates are each provided with an :1
aperture ll therethroueh and have their ends
turned in, as shown at l2 and I3- The Said aper- i
tures permit the escape of shavings or chalk
dust which accumulates behind the edges l2 and
13 during the sharpening operation. These in- 10
turned ends I2 and I3 form Scraping elements
so that when the chalk is pressed between the
diverging plates and moved longitudinally, as in
dicated in the arrow in Fig. 1, these edges 12 and
l3 will contact the outer sides of the chalk A 15
and will scrape therefrom excess material until
the chalk has been properly sharpened
It will thus be seen that I have produced a
Fig. 2 is a top plan view of Fig. 1 on an en20 larged scale;
Fig. 3 is an end elevation of Fig. 2;
Fig. 4 is an end elevation of a piece of sharpened chalk; and
Fig. 5 is a cross sectional view taken on the
25 line 5—5 of Fig. 2.
Tailor’s chalk is cast in blocks and is relatively hard in comparison to the ordinary chalk
used with black boards. Tailor’s chalk is used
for the purpose of marking upon cloth lines to
device which will perform all the objects above
set forth.
It is to be understood that the form of my invention herewith shown and described is to be
taken as a preferred example of the same and
that various changes relative to the material,
size, shape and arrangement of parts may be re- 25
sorted to‘ Without departing from the Spirit Of
the invention or the scope of the subjoined claim.
Having thus described my invention,I claim:In a device of the character described, a pair
30 be followed in stitching, positioning of buttons,
etc. In order that the line may be accurate, it
is necessary to sharpen this chalk along one side
of blocks, a pair of plates secured between said 30
blocks, said plates each having a portion thereof
diverging beyond the margin of said blocks, each
of said plates having an aperture formed in its.
diverging portion, each of said plates having the
ends of its diverging portion bent so as to form 35
thereof so that the line made on the cloth will
be clear and of ?ne proportions in counter-dis3
tinction to a heavy or wide line.
In the accompanying drawing wherein for the
purpose of illustration is shown a preferred embodiment of my invention, the numerals 5 and 6
designate a pair of blocks, held together by
scraping elements angularly disposed with rela
tion to each other.
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