Coherent light generators – Miscellaneous
Reexamination Certificate
2002-11-06
2004-08-24
Wong, Don (Department: 2828)
Coherent light generators
Miscellaneous
C372S109000, C372S101000, C033S281000, C033S283000, C033S286000, C033S291000, C033S27500R, C033S285000, C033S282000, C033S290000
Reexamination Certificate
active
06782034
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a small sized laser instrument used for building decoration and the like, and-more particularly, to a laser-plumbing leveler with adjustable height of the horizontal line.
DESCRIPTION OF PRIOR ARTS
Ever since the laser device is applied actually to the field of engineering technology, there have been some instrument products that use the laser technology for orienting and positioning in building, decorating and the like.
The early laser levelers (laser gyroscope, etc.) employed gas or solid laser, so that they are large in size, single in function, and high in price, thus the performance thereof is very limited in use. In 1976, when Chairman Mao's Memorial Hall was built, a laser gyroscope representing achievements of scientific research of that time was used for controlling the ground leveling. This, of course, is much faster and easier in leveling as compared with the ordinary leveler used in the past. However, due to many reasons such as technical and economical reasons, this kind-of instrument was not produced in batches and not used widely for a considerable period of time. This kind of instrument appeared much earlier in foreign countries, was produced in batches in 1980's, and used widely in construction engineering initially.
In the early of 1990's, there was laser automatic leveling leveler using bar code technology in foreign countries, which was mainly used for mapping and measuring leveling lines in big scale construction works, and was not convenient for use in construction, decoration and installation of the building. Because it is high in price and lacks prominent advantages, it has not been used frequently in China up to the present time.
Appearance and gradual use of large quantities of the semi-conductor laser device provide certain conditions for the miniaturization and popularization of the laser instruments used in engineering. Therefore, in 1990's, many foreign manufacturers started successively to produce in batches laser gyroscope type leveler used in engineering and their prices were also decreased. Therefore, this type of instrument was widely used in the economically developed countries and regions (For example, products made by the American David White). Some foreign manufacturers (for example, TOPCON of Japan) also filled patent in China for such type of products. However, since technologies of this type of instrument are widely known, the remaining contents that can be applied for patent is very limited. In recent years, small laser gyrohorizon used in decoration works has been appeared in the international market, the price thereof is equivalent to several thousands yuan (RMB). Among them, the American Momentum Laser Inc. once filled an application for patent for its products, but the design has no major improvement other than the non-essential feature that employing two semi-conductor laser units of the same direction so as to increase the lightness. Some optical instrument manufacturers in China (such as Beijing Optical Instrument Plant, Northwest Optical Instrument Plant, etc.) also began to manufacture the same type products and the small laser gyrohorizon in recent years, but these products have no major technical improvements. Their prices are still about two thousands yuan (RMB), which are still too high for the domestic construction and decoration industry. More importantly, these domestic or foreign laser-leveling instruments are all single in function and not convenient for use. Especially, they can not provide, in a convenient and quick way, the horizontal line of discretional height as well as the plumb line and the inclined line of discretional direction. Prior to this invention, there was no one product that can meet these requirements and decrease the price as well, thus it is unable to meet requirements of construction, decoration and the like really.
According to the statistic of the relevant departments of China, in 1998, a total found of 200 billions yuan was used for decoration works of civilian purpose (excluding decoration of large-scale industrial and commercial buildings), wherein funds for tools, equipment and measuring units (inclusive of instruments) occupy a considerable proportion. This can be seen from the numerous decorating tool stores in large cities, medium-sized cities and small towns all over the country. According to a statistic made in the latter half of 2000, there were more than 90,000 formal decorating companies in China, and the number of decorating companies is more astonishing if those informal decorating companies with smaller decorating teams are counted. That being horizontal in lateral direction and being perpendicular in vertical direction and that keeping inclined or horizontal as it should be, are the basic and most important quality requirements for building decoration works. However, as the basic means for ensuring decoration quality, the instruments and measuring tools for keeping horizontal in lateral direction and perpendicular in vertical direction are out of data. In China, low accuracy and inconvenient plumb bob, carpenter's ink marker and leveling ruler of even thousands of years' history are still being used today. And the method of “striking inked line” is still used in construction, some even still use filled pipe to measure levelness, this not only hampers improvement of productivity seriously, but also makes it difficult in maintaining quality.
Internationally, the building decoration industry has always been a prosperous industry, which has enormous need for instrument. Therefore, a better instrument that can provide good orienting and positioning in horizontal, vertical and inclined direction, and is convenient in use and inexpensive is desperately needed both domestically and internationally.
Objects of the Invention
Accordingly, one object of the present invention is to provide a laser-plumbing leveler with adjustable height of the horizontal line, comprising a laser emitting device, a laser line (plane) projecting optical system, and a laser line (plane) rotating and/or moving unit.
The second object of the present invention is to provide a laser-plumbing leveler used for positing in horizontal direction at different heights in construction, building decoration and the like, which can quickly provide horizontal datum and ensure that the provided horizontal line is of a certain accuracy, and the provided horizontal line can be adjusted continuously in its height according to requirements.
The third object of the present invention is to provide an instrument which can be easily mounted without the need of special accessories such as tripod, does not need to move the instrument back and forth while adjusting the height of the horizontal line, and does not need to raise or lower the laser-plumbing leveler of the entire instrument.
The fourth object of the present invention is to provide a laser-plumbing leveler, which not only provides the horizontal line, but also the plumb line and/or inclined line, in which position of the inclined line is also adjustable.
The fifth object of the present invention is to provide a laser-plumbing leveler supported on a universal joint consisted of magnet and steel ball.
These and other objects of the present invention will be more clear through the following detailed description.
SUMMARY OF THE INVENTION
The universal laser-plumbing leveler with adjustable height of the horizontal line of the present invention comprises a laser emitting device, a laser line (plane) projecting optical system, a laser line (plane) rotating and/or moving unit, a connecting device and a fixing device.
The laser line (plane) projecting optical system comprises a horizontal laser unit, a vertical laser unit and/or a inclined laser unit. the laser unit mainly comprises a laser tube, a positive lens and a cylindrical lens, the positive lens is mounted between the laser tube and the cylindrical lens, and the laser unit can be rotated or moved around the main axis and/or the center of the
Flores Ruiz Delma R.
Wong Don
LandOfFree
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