GB2134823A

GB2134823A - Stand for storing and sharpening chisels and plane irons

Info

Publication number: GB2134823A
Application number: GB08235989A
Authority: GB
Inventors: Keith Harris
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-12-17
Filing date: 1982-12-17
Publication date: 1984-08-22
Also published as: GB2134823B

Abstract

The stand comprises an elliptically cylindrical body member (1) the external surface of which is wholly or partially abrasive. The top slopes and has an openable hinged cover (8) studded with open ended sheaths (13). The sheaths (13) are spring loaded or alternatively provided with magnets which serve to secure the flat of a chisel or plane iron (10) firmly against each inner forward sheath wall maintaining a gap between the said iron (10) and rear inner sheath wall allowing for the insertion therein different thickness irons. A rotatable grinding disc is housed within the body member (1) parallel with the sloping cover (8) and is caused to rotate by an internal electrical motor (5), an external drill or alternatively, by manual means such as a handle. Chisels and plane irons frictionally engage the grinding disc when sheathed and may be sharpened individually or simultaneously. <IMAGE>

Description

SPECIFICATION Chisel stand with sharpening means The present invention is related to devices for the storage and sharpening of cutting tools.

Sharpening chisels and plane irons is a chore that is carried out daily. It is a time consuming and exacting task performed almost ritually by millions of D.l.Y. men and women as well as professional carpenters who at present have to use an oil-stone block possibly with the aid of a honing guide.

Expensive machines are available on the market, but because of the cost these are not practical for the individual to include in his tool kit.

On the whole, the rather primitive conventional method of using an oil-stone block works well enough, its major drawbacks being that it is time consuming, messy and tool cutting edges continually require resetting with a mechanised grinding wheel.

The object of the present invention is to provide a means of sharpening a set of chisels and plane irons simultaneously with little or no effort while they are all safely sheathed in the cheap, compact chisel stand embodying said invention.

According to the invention, there is provided a stand for sheathing chisels. Said stand having means therein to sharpen said chisels and other cutting tool irons.

Said invention comprising:~ A. An eccentrically cylindrical body member with open top. Said open top sloping so that said body member resembles a wedge if viewed from the side. Said body member also having a rear opening.

B. Each opening permits access to one of two separate compartments within the body member.

Said compartments being separated by a partition which is parallel with the sloping top opening.

C. The top and rear openings in the body member have covers. The rear cover being removably screwed and the top being hinged.

D. The hinged cover is perforated with slots.

Said slots varying in length to correspond with chisel irons of different sizes. Said slots have extensions which are perpendicular relative to the base of the body member when the said cover is in a closed position. Said extensions forming open ended chisel sheaths.

E. Said sheaths are so positioned on the body member top cover that when said cover is in a closed position, the cutting edges of chisels and other cutting tools therein housed will simultaneously come into contact with a rotatable oil lubricated grinding disc housed in the said body member.

F. Said chisel sheaths are formed to accommodate chisels supplied by all manufacturers. Said chisels having irons that vary in shape and thickness from one manufacturer to the next.

G. A wall within each chisel sheath is lined with magnetic strips which protrude inwardly toward the opposite inner wall.

H. Chisels housed in said sheaths are magnetically attracted by said magnetic strips, Said magnetic strips serving to secure said chisels in a vertical position without the opposite inner sheath wall being necessary for support. Said chisel and opposite inner sheath wall having a gap therebetween to allow for chisels with thicker irons.

I. A record turntable type platter is located in the body member compartment directly beneath the top cover. Said platter being parallel with the sloping top and partition separating both body member compartments is attached to and rotated by an internally housed electrical motor via two cog wheels.

J. Said platter being coupled to a drive axle rotatably journaled to the partition separating both body member compartments so that the cog wheels attached to the electrical motor and said platter drive axle are housed together with the said electrical motor in the compartment with rear access.

K. Alternative means of causing said platter to rotate may include the use of an external electrical motor means coupled with a flexible shaft. Said flexible shaft being connectable, at one end, to said external electrical motor means. The opposite flexible shaft end being connectable to an extended shaft coupled to a cog wheel. Said cog wheel engaging a cog wheel coupled to a drive axle. Said platter being coupled to said drive axle rotatably journaled to the partition separating both body member compartments so that said shaft and cog wheels are housed in the compartment with rear access.

L. Another alternative means of causing said platter to rotate may include the use of a manually turned handle. Said handle being connected to a lever which is attached, by two screws, to a circular block having a cylindrical extension. Said platter being coupled to a drive axle rotatably journaled to the partition separating both body member compartments so that said handle is housed in rear compartment attached by said cylindrical extension to said drive axle.

M. An oil lubricated grinding disc is removably mounted on the said platter.

N. A reservoir of machine oil is situated in the body member compartment directly beneath the top cover so that a portion of the oil lubricated grinding disc is continuously submerged therein.

O. The internally housed electrical motor may be powered by internally housed batteries or said electrical motor may achieve its power from a mains electric supply.

P. The outer surface sides of the body member may be coated with fine gritty particles which will provide an external oilstone type surface area for rubbing the burr off freshly sharpened chisels and other cutting edges.

R. Alternatively, said outer surface sides of the body member may be provided with a cavity. Said cavity housing a small sharpening stone, the outer surface of which will conform to the external shape of said body member. Said externally mounted sharpening stone providing a means of rubbing the burr off freshly sharpened chisels and other cutting edges.

S. Said oil lubricated grinding disc housed within the body member may be manufactured in plastics material or other suitably non brittle flexible material, both sides being fused with a thin layer of fine gritty particles to provide two oilstone type grinding surfaces.

T. Alternatively, said oil lubricated grinding disc may be formed, solidly, of the same material as that of a conventional oilstone.

The accompanying drawings show by way of example a preferred embodiment of the invention.

Figure 1 shows a sectional side view of a chisel stand with internally housed electrical motor.

Figure 2 shows a sectional side view of a spring loaded chisel sheath.

Figure 3 shows a sectional side view of a magnetic chisel sheath.

Figure 4 shows a plan view of a chisel sheath.

Figure 5 shows a front view of the chisel stand.

Figure 6 shows a plan view of the chisel stand.

Figure 7 shows a view, in isometric projection, of the chisel stand with two sheathed chisels.

Figure 8 shows a plan view and side view of a grinding disc.

Figure 9 shows a view of a grinding disc and record player type platter in a tilted position.

Figure 10 shows a sectional front view of a chisel sheath.

Figure 11 shows a part sectional side view of a chisel stand with rear mounted manually rotated handle.

Figure 12 shows a part sectional side view of a chisel stand with the chuck end of a flexible shaft attached.

The principle component of this invention is the eccentrically cylindrical body member (1) having two compartments (39) and (40) therein separated by a partition (41). Said partition (41) being parallel with the body member top.

When a profile observation is made of the body member ( 1 ) as in Figures 1, 1 1 and 12 it will be noted that the said top slopes. Said top forming an opening providing access to the forward body member compartment (39). Access to the rear body member compartment (40) may be provided with an opening situated in the back of the said body member (1). Both openings have covers, the rear cover (2) being removably screwed to the body member (1) and the top cover (8) being attached to the body member (1) with hinges ( 16).

Said top cover (8) being further secured, when in a closed position, with a catch or as illustrated in Figures 1, 5 and 6 afingertightened screw (15).

A profile view of the top cover or sections thereof as in Figures 1 , 2 and 3 illustrate how said top cover (8) is studded with hollow extensions.

Said extensions being perpendicular relative to the base line of the body member (1) when the top cover (8) is in a closed position protrude from the outer surface of the said top cover (8) to form outer extensions (17) and the inside surface of the said top cover (8) to form inner extensions (12).

Said extensions (12) and (1 7) form open ended sheaths for chisels (1 3). Two plane iron sheaths (1 9) are also located on the top cover (8). Said plane iron sheaths (19) having extensions (12).

Figures 5, 6 and 7 illustrate how each of the chisel sheaths (13) and the two plane iron sheaths (19) vary in longitudinal size to accommodate a basic range of corresponding chisel irons (10) and plane irons. Each chisel sheath (13) extension (17) is marked (21 ) with the size of the chisel it is designed to accommodate. I.e. a five eighths chisel is accommodated in a five eighths sheath, a three quarter inch chisel in a three quarter inch sheath and so on.

The chisel sheaths are designed to accommodate chisels of all makes and from all manufacturers. Said chisel irons (10) often varying in shape and thickness from one manufacturer to the next. A wall within each sheath (13) is lined with magnetic strips (18), as illustrated in Figure 3 and Figure 4, which protrude inwardly toward the opposite inner sheath wall by approximately 1 mm. Larger magnets (20), as illustrated in Figure 6, may be employed although the previously mentioned magnetic strips are preferred in order to reduce frictional engagement with chisels (10).

Chisels inserted in the sheaths (13) are magnetically attracted by the magnetic strips (1 8).

Said magnetic strips serving to secure said chisels (10) in a vertical position as illustrated in Figure 3 without the opposite inner sheath wall being necessary for support. Said sheathed chisel (10) and said opposite wall having a gap therebetween to allow for the insertion therein of thicker irons.

The inner edges of the chisel sheaths (13) and plane iron sheaths (19) may be lined with thin metal strips (27) as illustrated in Figure 10. Said strips (27) serving to prevent excessive inner sheath wear and damage that might otherwise be caused when chisels and other tools are constantly being sheathed and unsheathed.

The plane iron sheaths (1 9) may or may not be lined with magnetic strips (18) because most plane irons tend to be milled to the same thickness. The walls within the said plane iron sheaths (19) should suffice to support said plane irons in a vertical position without the aid of magnetic strips (18).

An alternative method of supporting chisels, when sheathed, may include the use of a spring attachment (14) as illustrated in Figure 2.

A record turntable type platter (4) is housed within the forward body member compartment (39) as illustrated in Figure 1 so that the said turntable type platter (4) is in a position, within the said body member (1), directly beneath the sheath studded top cover member (8). Said platter (4) being coupled to a drive axle (22) that is rotatably journaled to the partition (41), separating both body member compartments (39) and (40), by a bearing (9) and extends into the body member compartment with rear access (40). Said axle (22) being coupled to a large cog wheel (6) engaging a smaller cog wheel (11) that is attached to and driven by an electrical motor (5) housed within the body member (1).

As illustrated in Figures 11 and 12, two alternative methods of causing the platter to rotate may include, as in Figure 12, the use of an external electrical motor means such as a portable hand drill coupled to a flexible shaft (32). Said flexible shaft (32) being connectable, at one end, to the said external electrical motor. The opposite flexible shaft end with chuck (31) being connectable to an extended cog wheel shaft (30) journalled to a bearing (29) mounted on a bracket (28). A turntable type platter (4) is positioned, as in Figure 1, beneath the sheath studded top cover member (8). Said platter (4) being coupled to a drive axle (22) that is rotatably journaled to the partition (41), separating both body member compartments (39) and (40), by a bearing (9) and extends into the body member compartment with rear access (40).Said axle (22) being coupled to a large cog wheel (6) housed in said compartment with rear access (40). Said large cog wheel (6) engaging a smaller cog wheel (11) attached to the extended shaft (30).

Figure 11 illustrates how the said turntable type platter (4), as in Figure 1, may be manually rotated with the use of a handle (34). Said platter (4) is coupled to a drive axle (22) which is rotatably journaled to the partition (41), separating both body member compartments (39) and (40), by a bearing (9) and extends into the body member compartment with rear access (40).

Said handle (34) being attached to a lever (38) which is secured, with two screws (35), to a circular block (36). Said block (36) having a cylindrical extension (37) to which the said platter drive axle (22) is attached.

The record player type platter (4) housed in the forward body member compartment (39) directly beneath the sheath studded top cover (8) is designed to support and rotate a wafer thin grinding disc (3). The said grind disc (3) has a central hole (26) which corresponds in size with a circular protrusion (25) centrally located on the face side of the said platter (4) so that, when installed, the said grinding disc (3) will remain in a centralised position on the said platter (4). A small catch (24) is located on the side of the circular platter protrusion (25) and a corresponding notch (23) is located on the grinding disc (3). The said notch and catch arrangement serving to prevent the disc (3) from skidding on the rotating platter (4) when a set of chisels (10) and other cutting tools are sheathed with cutting edges (42) pressing simultaneously on the said grinding disc (3).The grinding discs (3) may be manufactured in plastics material or other suitably non brittle flexible material. Both sides of said discs (3) being fused with a hard wearing layer of fine gritty particles to provide two surfaces similar to that of a sharpening stone block. Discs thus manufactured would be cheap, light weight, hard to break and wafer thin.

Alternatively, solid stone grinding discs may be made available. The burr on freshly sharpened chisels, etc. may be rubbed off on the external surface area of the body member (1) which may be fused with a coat of fine gritty particles forming an external oilstone type surface.

All components forming this invention may be manufactured in plastics material or other suitable lightweight substantially rigid shock resistant material with the exception of the magnetic strips (18), bearings (9) and (29), sheath lining strips (27), electrical motor (5) and any screws that may be used for assembly. When not being used for sharpening purposes, the stand embodying this invention serves to keep chisels together neatly and safely sheathed until they are needed again.

When the chisels, etc., are about to be used, the electrical motor is switched on and the said chisels, etc., are sharpened automatically while they are sheathed.

The terms and expressions which have been employed in the foregoing description are used therein as terms of description and not of limitation, and there is no intention, in the use of such terms and expressions, of excluding equivalents of the features shown and described or portions thereof, it being recognized that the scope of the invention is defined and limited only by the claims which follow.

Claims

1. A storage and sharpening stand for sheathing a plurality of tools with means therein to sharpen and grind said plurality of sheathed tools individually or simultaneously.

2. A storage and sharpening stand according to claim 1 comprising a hollow body member with a vertical elliptically cylindrical partially or wholly abrasive external peripheral surface, open top and circular top cover member.

3. A storage and sharpening stand according to claim 1 and claim 2 wherein the vertical peripheral surface of the body member or portion thereof is provided with a cavity for the insertion therein of a grinding block.

4. A storage and sharpening stand according to claim 2 wherein the circular top cover is attached to the body member in a tilted position, when closed, corresponding to the correct grinding angle of a chisel or plane iron cutting edge when said chisel or plane iron is held vertically.

5. A storage and sharpening stand according to claims 2 and 4 wherein the top cover member is perforated and studded with a plurality of open ended chisel and plane iron sheaths.

6. A storage and sharpening stand according to claims 4 and 5 wherein the sheaths support chisels and plane irons in a vertical position when the top cover member is closed and tilted.

7. A storage and sharpening stand according to claims 1 to 6 wherein chisels and plane irons are self supportive and frictionally engage a rotating abrasive disc under pressure of their own weight caused by gravity.

8. A storage and sharpening stand according to claims 1 to 7 wherein an abrasive disc is housed within the body member in a tilted position parallel with the top cover and corresponding with the correct grinding angle of a vertically sheathed chisel or plane iron cutting edge.

9. A storage and sharpening stand according to claim 5 wherein the chisel sheaths are spring loaded. Said springs serving to support or brace the flat of a chisel iron firmly against the forward inner sheath wall so that a gap is maintained between the said chisel and rear inner sheath wall to allow for the insertion therein of thicker irons or tapering irons that become shorter and thus thicker with wear.

10. A storage and sharpening stand according to claim 5 wherein magnets are embedded within the forward wall of each sheath. Said magnets serving to secure the flat of a chisel iron firmly against the said forward wall of each sheath so that an opposing sheath wall is not necessary for support thus allowing for the insertion therein of thicker irons or tapering irons that become shorter and thicker with wear.

11. A storage and sharpening stand according to claims 1 to 10 wherein the periphery of the tilted abrasive disc, if viewed from above, defines an ellipse around which the vertical elliptically cylindrical surface shape of the body member is formed.

12. A storage and sharpening stand according to claims 1 to 11 wherein the tilted abrasive disc is mounted on a rotatable backing platter.

13. A storage and sharpening stand according to claim 12 wherein the abrasive disc is flexible and abrasive on both sides.

14. A storage and sharpening stand according to claims 1 to 13 wherein the abrasive disc is caused to rotate with a handle.

15. A storage and sharpening stand according to claims 1 to 13 wherein the abrasive disc is caused to rotate by an electrical motor.

16. A storage and sharpening stand according to any of claims 1 to 15 wherein, as an alternative to a flexible abrasive disc, a conventional solid stone grinding disc will be usable with the present device.

17. A storage and sharpening stand substantially as described herein with reference to Figures 1 to 12 of the accompanying drawings.