Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate
1998-10-20
2001-04-10
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Miscellaneous
Light direction
C033S339000, C033S285000, C033S413000
Reexamination Certificate
active
06212782
ABSTRACT:
BACKGROUND OF THE INVENTION
Prior to any building project it is necessary to first establish the building lines. This is accomplished by driving stakes into the ground to locate corners or other reference points of the proposed structure. These stakes are then connected with string to form the building lines which represent the shape of the structure. The stakes, and thus the building lines, must be placed relative to each other at specific angles. The current state of the art includes a variety of devices for determining the measurement/layout of angles, however, they are limited by their ability to only measure/layout one angle at a time before the device must be somehow moved or set up again for the next angle. While this method of layout is standard procedure for the layout of non-regular polygons, a device capable of laying out multiple equal angles, as are found in regular polygons such as hexagonal and octagonal structures, and to do so simultaneously with only one setup of the device, is lacking in the current state of the art. Even transits, which could be used to achieve the layout of a regular polygon, require repetitive movement of the telescope so that one angle at a time may be laid out. The importance of this “one set-up” capability lies in the fact that any additional set-ups/movements required of a survey device greatly increase the possibility of error in the layout. This is particularly true for “do-it-yourselfers” and others who may lack specific skills in the use of surveying instruments.
The objective of the present invention then is to provide an inexpensive device for simplifying the layout of both single and multiple angles when constructing building lines, thus making it possible for both the skilled, and the semi-skilled worker to layout shapes of structures that otherwise would prove too complicated.
SUMMARY OF THE INVENTION
As stated, the primary objective of the present invention is to simplify the process wherein stakes driven into the ground must be located relative to one another at specific angles when starting a building project. The present invention achieves this objective by utilizing a circular disc like template having about its circumference various scales designed to aid in the layout of any angle within the 360 degrees of the circle, as well as a variety of geometric shapes which can be laid out when using the disc as a central point-of-beginning.
To layout a rectangle for a building project two stakes are first driven into the ground and nails driven into them to locate two points in a line. A string is then tied from nail to nail establishing a straight line. This stringline will serve as a baseline for one side of the rectangle. The disc is then placed over the nail on top of one of the stakes, it is held stationary by a bifurcated projection which straddles the stringline thus keeping the disc from turning. A second string is then attached to the nail, which is now in the center of the disc, and pulled to the desired angle relative to the baseline by lining it up over one of the 360 degree marks located about the circumference of the disc. In the case of the rectangle, this would be 90 degrees. The disc is then moved to another stake and the process repeated until all four sides of the rectangle have been staked. More than one disc can be used to further expedite the process.
To layout a hexagon, strings are attached to the nail in the center of the disc and pulled over each of 6 reference marks located in a circular pattern on the top side of the disc. Measuring equal distances on each of the six strings emanating from the center of the disc will allow the layout of any size hexagon desired. The same process can be followed for a variety of other geometric shapes marked on the disc.
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Fernandez Maria
Gutierrez Diego
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