US2588499A

US2588499A - Reciprocating chalk sharpener

Info

Publication number: US2588499A
Application number: US168632A
Authority: US
Inventors: Dubek Theodore
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-06-16
Filing date: 1950-06-16
Publication date: 1952-03-11
Anticipated expiration: 1969-03-11

Description

11, 1952 T. DUBEK 2,588,499

RECIPROCATING CHALK SHARPENER Filed June 16, 1950 2 Sl-IEETS-Si-IEET l INVENTOR. 7/1 5000: .DUEAA BY ,9 7' rams Ens March 11, 1952 DUBEK 2,588,499

RECIPROCATING CHALK SHARPENER Filed June 16," 1950 2 SHEETS-SHEET Z 3 H w M y n a #4 5 w M Y n 11 m 5 H a r 22 m a 1 w w 9 V f. 0r 1 K. Al/1 0 W. 0 +7 1 l 03 0 0 I )1 ZR a 4 4 5 Y1 7 m m J B a a H 1 1 1/ a iatentecl Mar. 11

UNITED STATES PATENT OFFICE RECIPROCATIN G CHALK SHARPENER Theodore Dubek, Astoria, N. Y.

Application June 16, 1950, Serial No. 168,632

3 Claims.

This invention relates to a chalk sharpener. and more particularly to a reciprocating chalk sharpener for shaving tailors chalk and the like.

An object of this invention is to provide a chalk sharpener for shaving tailors chalk and the like in which the bevel of the sharpened edges of the chalk can be manually selected.

Another object of this invention is to provide a chalk sharpener which is adapted for ready attachment to a supporting surface, and is particularly adapted to collect chalk shavings accumulated during use.

A further object of this invention is to provide a chalk sharpener for shaving tailors chalk and the like which is safe in operation, simple in structure, and relatively cheap to manufacture.

The above and still further objects and advantages of this invention will become apparent upon consideration of the following detailed description of the invention, when taken in conjunction with the accompanying drawings, wherein:

Figure l is a top plan view of the chalk sharp- .ener of the present invention;

Figure 2 is a sectional view taken along the line 2-2 of Figure 1;

Figure 3 is an elevational view taken from the left of Figure 1;

Figure 4 is a sectional view taken on the line 4-4 of Figure 1;

Figure 5 is a sectional view taken along the line 5-5 of Figure l;

Figure 6 is a side elevational view taken from the rear of Figure 1, with the chalk-shaving receptacle removed;

Figure 7 is an enlarged perspective view of the chalk-pushing element forming a part of the chalk sharpener of the present invention; and

Figure 8 is a perspective view of a piece of chalk sharpened with the chalk sharpener of the present invention.

Referring now more particularly to the drawings, wherein like reference numerals have been used throughout the several views to designate like parts, there is shown the chalk sharpener of the present invention, generally designated by the numeral II], which includes a horizontally disposed base including a table l2 provided with a longitudinally extending slot l3 intermediate its side edges, the slot having its ends terminating at a point adjacent to and spaced from the. ends of the table l2. Positioned contiguous to one side edge of thetable l2 and fixed- Figures 4 and 5, the angle iron has its horizontal leg .ll abutting against the under surface of the table |2 and secured thereto with the vertical leg i8 disposed in substantial alignment with the adjacent side of the slot l3. Positioned below the slot l3 and supported on the angle iron is is a second angle iron l9 which has its vertically disposed leg 20 abutting against the vertical leg is of the angle iron l6 and secured thereto, and has its horizontally disposed leg 2| disposed in spaced parallel relation with respect to the table l2. Resting upon the horizontally disposed leg 2| of the angle iron l9 and secured thereto is a longitudinally extending molding 22 which is spaced from the vertical leg |8 of the angle iron l6. Accordingly, the adjacent portions of the molding 22 and the vertical leg l8 cooperate with the horizontal leg 2| of the angle iron is to form a guideway 23 extending longitudinally of the base I below the slot I3 in spaced confronting relation with respect tothe latter. As clearly shown in Figure 4, theslot l3 and the guideway 23 cooperate to support a piece of chalk to be sharpened, the chalk being designated by the reference numeral 24.

Positioned intermediate the ends of the guideway 23 and supported on the base II in a skewed plane is a cutter blade 25 which has its leadin edge 26 extending from the bottom of the guideway 23 contiguous to one side thereof toward the top and other side of the guideway at an acute angle with respect to the bottom thereof. To effect this disposition of the blade 25, the vertical leg |8 of the channel iron I6 is provided with a slot 21, Figure 6, which is disposed at an angle with respect to the horizontal leg I! thereof, and the horizontal leg 2| of the angle iron I9 is cut away intermediate its ends, as indicated by the reference numeral 21 in Figure 1. It is to be noted that the molding 22 is similarly cut away, as indicated by the reference numeral 28, to permit the blade to be positioned in the skewed plane across the guideway 23.

The blade 25 is supported by means of a base plate 29 which is dependingly supported from the vertical leg 3 of the angle iron l5, and the retaining plate 30 which overlies the base plate 29 and is secured thereto by means of the threaded bolts 3|, 32. It is readily apparent that the confronting faces of the base plate 29 and the retaining plate 30 can be brought into tight engagement with respect to the adjacent end of the blade 25 to thereby detachably-secure the latter in its desired position.

Extending through the slot l3 into the guideway 23 and supported on the base H for move- 1 ment therealong toward and away from the leading edge 26 of the blade 25 is a chalk-pushing element, generally designated by the reference numeral 35, Figure 7. The chalk-pushing element 35 is supported on the base I by means of a U-shaped bracket, generally designated by the reference numeral 36, which has its bight 31 resting upon and fixedly secured to the table l2 contiguous to one side of the slot l3, and has its legs 38, 39 extending upwardly from the table; Disposed intermediate the legs 38, 39 of the bracket 35 and supported on the latter is a longitudinally extending sleeve 40 which slidably receives and supports a collar 4| of the chalk-pushing element 35. The chalk-pushing element 35 further embodies a depending dog 42 which extends into the guideway 23. As clearly shown in Figure 7, the face of the chalk-pushing element 35 confronting the blade 25 is provided with a leather cover, designated by the reference numeral 43 which prevents the bladefl25 from chipping and dulling the chalkpushing' element.

Disposed contiguous to the side of the slot I3 remote from the bracket 3'6jis a guide plate 44 which is mounted on the table l2 for movement transversely thereof into and out of bridging relation with respectto the slot 13. As clearly shown in Figure 4, when the guide plate 44 is positioned so that its side edge extends beyond the adjacent side edge of the slot t3, the position of the chalk 24 can be varied with respect to the leading edge 26 of the blade 25. Accordingly, the user can select the bevel of the sharpened edges of the chalk 24.

Dependingly supported from the base I l is a receptacle 45 for accumulating the chalk shavings when the device is used to sharpen the chalk. The support for the receptacle 45 embodies a pair of

end walls

46, 41 dependingly secured to the table l2 of the base H, each of the end walls pivotally supporting a latch piece, designated by the

reference numerals

48, 49, which are slotted, as indicated by the reference numeral 50, Figure 3, to accommodate lugs 52' extending outwardly from the walls of the receptacle 45. It is readily apparent that the

latch pieces

48, 49 can be removed from engagement with the lugs 5|, 52, to thereby permit the removal of the receptacle 45- for thedisposal of the contents thereof.

In actual use, the. chalk pushing element 35 is moved along the sleeve 40 to its most remote position from .the leading edge of the blade 25. The chalk to be sharpened is then inserted through the slot l3 and supported in the channelway 23 and by the sideof the slot I3. The chalk-pushing element 35 is then manually grasped and reciprocatedtoward and away from the blade 25 to thereby effect the shaving of the chalk. If the beveled edge of the chalk is to be varied, it is merely necessary to position the guide plate 44 so that it overlies the slot and supports the chalk at a different angle with respect to the cutter blade 25.

Although only one embodiment of the chalk sharpener of the present invention has been shown, it is readily apparent that numerous modifications can be made without departing from the spirit of the invention as set forth in the appended claims.

What I claim is:

1. A chalk sharpener comprising a table provided with a longitudinally extending slot, a guideway positioned below and in longitudinal spaced aligned relation with respect to said slot and dependingly supported from said table, an upstanding fixed blade supported from said table arranged longitudinally of said guideway intermediate its ends and having the portion adjacent the lower end extending at an acute angle through said guideway, a sleeve arranged longitudinally of and spaced above said table slot and supported on said table, and an upstanding chalk pusher element arranged transversely of and extending through the longitudinal table slot and having the lower end extending into said guideway and supported on said sleeve for longitudinal back and forth movement for feeding an upstanding piece of chalk when supported by a side edge of said table slot and said guideway into engagement with the lower end portion of said blade.

2. A chalk sharpener comprising a table provided with a longitudinally extending slot, a guideway positioned below and in longitudinal spaced aligned relation with respect to said slot and dependingly supported from said table, an upstanding fixed blade supported from said table arranged longitudinally of said guideway intermediate its ends and having'the portion adjacent the lower end extending at an acute angle through said guideway, a sleeve arranged longitudinally of and spaced above said table slot and supported on said table, an upstanding chalk pusher element arranged transversely of and extending through the longitudinal table slot and having the lower end extending into said guideway and supported on said sleeve for longitudinal back and forth movement, and a guide plate arranged longitudinally of and resting upon the top of said table on one side of said table slot and connected to said table for limited sliding transverse overhanging movement with respect to said table slot to selectively vary the width of the latter slot to thereby vary the position of an upstanding piece of chalk when supported by a side edge of said table slot and said guideway.

3. A chalk sharpener comprising a table provided with a longitudinally extending slot, a guideway positioned below and in longitudinal spaced aligned relation with respect to said slot and dependingly supported from said. table, an upstanding fixed blade supported from said table arranged longitudinally of said guideway intermediate its ends and having the portion adjacent the lower end extending at an acute angle through said guideway, a sleeve arranged longitudinally of and spaced above said table slot and supported on said table, an upstanding chalk pusher element arranged transversely of and extending through the longitudinal table slotand having the lower end extending into said guideway and supported on said sleeve for longitudinal back and forth movement for feeding an upstanding piece of chalk when supported by a side edge of said table slot and said guideway into engagement with the lower end portion of said blade, and a receptacle positioned below said table and dependingly carried by the latter for the reception of chalk shavings.

THEODORE DUBEK.

REFERENCES CITED The following references are of recordin the file of this patent:

UNITED STATES PATENTS Number Name Date 355,243 Wyatt Dec. 28, 1886 957,733 Brantz May 10, 1910 2,502,124 Bray Mar. 28, 1950 FOREIGN PATENTS Number Country Date 9,441 Great Britain May 1', 1908