Патент USA US2128115код для вставки
Aug. 23, 1938. 2,128,115 l. B] EN SHARPENER Filed Aug. 17, .1937 um. ’ 13113.5. FIE-3.5. ATTORNEY. Patented Aug. 23, 1938 UNITED STATES PATENT OFFICE 2,128,115 SHARPENER 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. u“ 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. 20 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. _ ISRAEL BIEN.