IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0007718
(2001-11-13)
|
|
발명자
/ 주소 |
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| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
39 인용 특허 :
0 |
초록
▼
The present invention is a device and method for aligning a hand drill so that holes can be drilled at a desired angle in a workpiece. A light source and a template are attached to the drill so that an image is projected onto the workpiece surface. For drilling holes perpendicular to the surface, th
The present invention is a device and method for aligning a hand drill so that holes can be drilled at a desired angle in a workpiece. A light source and a template are attached to the drill so that an image is projected onto the workpiece surface. For drilling holes perpendicular to the surface, the direction of the projected light beam is parallel to the axis of the drill bit. The preferred image is comprised of two concentric circles and two perpendicular straight lines of equal length whose midpoints correspond with the center of the circles. The two lines preferably have discontinuities of equal length at their midpoints so as to be comprised of segments of equal length. When the drill is not properly aligned relative to the workpiece, the projected circles appear oval in shape and at least some of the lines or line segments differ in length. The eye can readily discern these image distortions so that the drill can be readily adjusted to the desired angle.
대표청구항
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1. A device for aligring a tool with respect to a workpiece, comprising: a light source; a template of an image to be projected, wherein said template comprises an image pattern on a transparent or translucent glass or plastic material; and a means for attaching said light source and said templ
1. A device for aligring a tool with respect to a workpiece, comprising: a light source; a template of an image to be projected, wherein said template comprises an image pattern on a transparent or translucent glass or plastic material; and a means for attaching said light source and said template to the tool, whereby an image is projected onto a surface of the workpiece and is used to assess the orientation of the tool with respect to the surface of the workpiece. 2. The device of claim 1, wherein the tool is a hand drill. 3. The device of claim 1, wherein said light source is selected from the group consisting of incandescent bulb, fluorescent bulb, laser, and light emitting diode (LED). 4. The device of claim 1, further comprising a housing for said light source and said template. 5. The device of claim 4, wherein said housing includes a cylindrical surface. 6. The device of claim 4, further comprising a transparent or translucent end piece for said housing. 7. The device of claim 4, wherein said light source and said template are attached to said housing and said housing is attached to the drill. 8. The device of claim 7, wherein said housing is pivotally attached to the drill. 9. The device of claim 8, further comprising a reference mark and a calibration mark for determining the angle of the tool with respect to the surface of the workpiece. 10. The device of claim 1, wherein the image pattern is formed by scribing, drilling, cutting, etching, printing, stenciling, stamping, molding or combinations thereof. 11. The device of claim 1, wherein the image pattern comprises an ink or pigment applied to the glass or plastic material. 12. The device of claim 1, wherein the image includes a circle. 13. The device of claim 12, wherein the image further includes a continuous or discontinuous straight line whose midpoint corresponds with the center of the circle. 14. The device of claim 1, further comprising a curved reflector to intensify, collimate or focus light from said light source used to project the image. 15. The device of claim 1, further comprising a lens for focusing or adjusting the size of the projected image. 16. A device for aligning a tool with respect to a workpiece, comprising: a light source; a template of an image to be projected, wherein said template comprises an image pattern on a transparent or translucent glass or plastic material; a housing containing said light source and said template; and a means for attaching said housing to the tool, whereby an image is projected onto a surface of the workpiece and is used to assess the orientation of the tool with respect to the surface of the workpiece. 17. A method for aligning tool with respect to surface of a workpiece, comprising the steps of: (1) attaching a projector comprised of a light source and a template to the tool, wherein said template comprises an image pattern on a transparent or translucent glass or plastic material; (2) projecting an image onto a surface of the workpiece; and (3) adjusting the orientation of the tool with respect to the workpiece until a substantially undistorted image corresponding to the desired orientation between the tool and the workpiece is observed. 18. The method of claim 17, wherein the tool is a hand drill. 19. The method of claim 17, further comprising the step of: (4) adjusting the size of the image projected onto a surface of the workpiece.
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