Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate
1998-05-28
2001-04-24
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
C033S365000
Reexamination Certificate
active
06219926
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ruler. More particularly, the present invention relates to a ruler for measuring and marking lengths and angles relative to a horizontal plane by utilizing gravity.
2. Description of the Prior Art
Numerous innovations for measuring devices have been provided in the prior art that will be described. Even though these innovations may be suitable for the specific individual purposes to which they address, however, they differ from the present invention.
FOR EXAMPLE, U.S. Pat. No. 4,267,642 to Stapleford teaches an angle gage mechanism for use in measuring angles of surfaces in a work piece usually requiring more than one conventional tool at the present time. This invention is capable of performing the most used functions of at least five conventional tools, to wit, solid square, bevel protractor, combination square, rule and bevel. It also includes a vernier for added accuracy and a plurality of pre-set angles that can be readily selected by the user.
The invention comprises a frame with a cylindrical hole housing a cylindrical spindle having means for readily locking the spindle at predetermined angles with respect to the frame and means for frictionally locking the spindle at any angle with respect to the frame. A slot in the frame aligned with a partial slot in the spindle receive a slidable ruler. The frame is further provided with means for frictionally locking the ruler relative to the spindle.
ANOTHER EXAMPLE, U.S. Pat. No. 4,715,127 to Bernabeu teaches a device for measuring angles between an oriented axis and a vector that is provided in the form of a flat plate of transparent material having at least two straight parallel edges and an arrow situated on the plate and parallel with the edges; the plate has a number of zones marked on the surface thereof and a closed curve centrally located and a longitudinal line provided parallel to the edges on either side of the central zone. Markings are provided in the zones to facilitate the measurement of the angles without requiring removal of the plate from the surface on which the angles are being measured.
FINALLY, STILL ANOTHER EXAMPLE, U.S. Pat. No. 5,383,276 to Izumi teaches an angle trisecting device with a base section having two angle indicating scales and an elongated member with a straight edge portion. The elongated member is pivotally mounted on the base section. A given angle on one angle indicating scale coinciding with the straight edge portion corresponds to a trisected angle on the other angle indicating scale coinciding with the straight edge portion. Pivot pins extend from the elongated member and are removably captured in respective base slots to ensure reliable operation. In another embodiment a guide wall extends from the base to ensure reliable operation. An optional link arm is pivotally mounted to the base section and with one end pivotally mounted to the elongated member.
It is apparent that numerous innovations for measuring devices have been provided in the prior art that are adapted to be used. Furthermore, even though these innovations may be suitable for the specific individual purposes to which they address, however, they would not be suitable for the purposes of the present invention as heretofore described.
SUMMARY OF THE INVENTION
ACCORDINGLY, AN OBJECT of the present invention is to provide a ruler for measuring and marking lengths and angles relative to a horizontal plane by utilizing gravity that avoids the disadvantages of the prior art.
ANOTHER OBJECT of the present invention is to provide a ruler for measuring and marking lengths and angles relative to a horizontal plane by utilizing gravity that is simple and inexpensive to manufacture.
STILL ANOTHER OBJECT of the present invention is to provide a ruler for measuring and marking lengths and angles relative to a horizontal plane by utilizing gravity that is simple to use.
BRIEFLY STATED, YET ANOTHER OBJECT of the present invention is to provide a ruler for measuring and marking lengths and angles relative to a horizontal plane by utilizing gravity. The ruler includes a substrate for being oriented relative to a horizontal plane and for measuring and marking lengths, and angle measuring assembly associated with the substrate for measuring and marking angles. The angle measuring assembly has a pointer whose lowermost end is heavier than its uppermost end, which allows the pointer to always remain vertical, regardless what angle the substrate is oriented relative to the horizontal plane, with the angle the substrate is oriented relative to the horizontal plane being the angle to be measured and being that angular increment of a scale of the angle measuring assembly that the pointer points too.
The novel features which are considered characteristic of the present invention are set forth in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of the specific embodiments when read and understood in connection with the accompanying drawing.
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patent: 4188729 (1980-02-01), Peterson
patent: 4204334 (1980-05-01), Dela Cruz
patent: 4212123 (1980-07-01), Robin
patent: 4267642 (1981-05-01), Stapleford
patent: 4715127 (1987-12-01), Bernabeu
patent: 4999922 (1991-03-01), Loggins
patent: 5383276 (1995-01-01), Izumi
patent: 14103 (1898-01-01), None
Fernandez Maria
Gutierrez Diego
Miller Richard L.
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