Geometrical instruments – Miscellaneous – Light direction
Patent
1985-07-09
1986-12-02
Haroian, Harry N.
Geometrical instruments
Miscellaneous
Light direction
33438, B43L 1300, G06K 1522, G05B 1939
Patent
active
046254102
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
The invention concerns a drawing or engraving device or plotter with a first and second travelling carriage system. The first travelling carriage system consists of a first guide rail supporting a movable first travelling carriage to which a second guide rail supporting a movable second travelling carriage is attached. The second travelling carriage system is similarly constructed. It is provided to compensate for deviations from the desired pattern.
The second travelling carriage of the first travelling carriage system supports a third guide rail. A working head is mounted on the travelling carriage of the fourth guide rail.
Means are provided to measure the distances covered by the travelling carriages on all four guide rails to determine the actual coordinates in a predetermined coordinate system of the pattern actually travelled by the working head. The second travelling carriage system is provided with electric drive means to drive both travelling carriages. This travelling carriage system constitutes a compensation system. The drive means are locked when in a nonactivated condition.
An analagous drawing device is known from the prior art, which in contrast with the present invention, has a second travelling carriage system that is an independent device that can be attached to a ruler or to the drawing head of the first travelling carriage system.
In the present invention, the working head supports a drawing tool. The working head is controlled with the aide of a computer controlled drive unit to execute a selected predetermined pattern which can comprise line segments or elements. Predetermined patterns include, for example, numbers, letters or curves. The radii of the curves can also be selected. These patterns are stored in the memory and can be selected using an input keyboard. The working head can be guided within its range of motion to draw one or more patterns stored in the memory as numerical signals or values. These patterns can be drawn at any preselected spot.
The purpose of the invention is to present a relatively simple and easy-to-use drawing or engraving device which provides computer-aided freehand drawing or freehand engraving.
The problems of the drawing or engraving devices of the prior art are solved in accordance with the invention by providing, inter alia, program means having an input keyboard for selecting the predetermined pattern coordinates through which the working head should pass to draw a desired pattern. The predetermined coordinates are stored in a memory. A computer calculates the deviation of the actual coordinates of the working head from the predetermined coordinates. Control means connected with drive means drive the travelling carriages of the second travelling carriage system, i.e., the compensation system, according to a value representing the deviation calculated by the computer.
The advantage of the invention is presented especially by the fact that to produce the movement of the working head, the first travelling carriage system is manually guided and is comparable to the easy action of a freehand drawing or drafting machine, while the travelling carriages of the second travelling carriage system connected to the first travelling carriage system can be moved in addition by a motor to produce very exact selected line segments despite inaccurate manual guidance of the working head. Thus, it can be seen that the second travelling carriage system provides a compensation system which corrects or compensates for unavoidable deviations from the selected patterns.
In the foregoing manner, the drawing tool, for example a pencil, secured to the working head follows the selected pattern coordinates exactly despite unavoidable fluctuations caused by manual guidance if the user turns on the computer controlled drive to aid in the execution of a selected pattern and a pattern is selected. Undesired deviations transmitted from the user's hand to the travelling carriages of the first travelling carriage system which normally would be transmitted to
REFERENCES:
patent: 1436673 (1922-11-01), Nunamaker
patent: 1443088 (1923-01-01), Pasquariello
patent: 3473157 (1969-10-01), Little et al.
patent: 4356632 (1982-11-01), Anderka
patent: 4430797 (1984-02-01), Eder
Franz Kuhlmann Prazisionsmechanik und Maschinenbau GmbH & Co. KG
Haroian Harry N.
LandOfFree
Computer-aided drawing or engraving device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Computer-aided drawing or engraving device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer-aided drawing or engraving device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2285658