SU145010A1 - Marking device for applying coordinates of hole centers on photo originals - Google Patents

Description

Marking devices are known for plotting the coordinates of the hole centers on photo originals. So, for marking, many factories used plexiglas tables with a thickness of 18-20 mm, with a size of 1000 X 100 mm. When the needle was prickled on the grid tables of the centers of the openings of the photo originals, the coordinates lost accuracy, the diameters of the holes were developed.

Thus, these devices do not provide mechanization and the necessary accuracy of the marking process. The proposed device does not have these disadvantages. This is achieved in that the marking device is equipped with a movable ruler with a keyboard and needles installed in it.

FIG. 1 schematically shows the proposed device; in fig. same, in section along aa and a in fig. one; in fig. 3 - the same, in section according to BB in FIG. one.

The marking device consists of a fixed part and a movable ruler. The fixed part consists of a frame 1, a plate 2, a rubber gasket 3, two brackets 4, two strips 5 with fixing holes, two guides 6, two reading lines 7.

The rearranged ruler contains base S, two brackets 9 with four ball bearings W, two latches 11, springs / 2, two indices 13, levers with buttons 14, needles 15, needle guides 16 and handle 17.

The device is installed on any stationary stele. When marking the rubber gasket 3, a billet is laid out from the draw paper of the Gosznak factory of manual casting and secured with clamps or weights. The movable ruler moves along the guides and can be installed in any horizontal row of holes and is fixed with two latches. Further, by pressing and needle 15 on the required keyboard, pierce the blank of the photo original. So

Thus, by moving the ruler along the guides and fixing its position, marking is made on the entire surface in the coordinate grid. You can accept any number on the vertical rulers and any key as a starting point. The proposed device, having the ability to move along two mutually perpendicular coordinate axes, allows using the keyboard system to plot the coordinate centers with a high degree of accuracy (± 0.02 mm); the presence of a keyboard system allows you to plot coordinate centers at high speed.

The device according to the invention can find wide application in research institutes, design offices, factories and other enterprises.

Subject invention

Marking device for applying coordinates of hole centers on photo originals, characterized in that, in order to mechanize and increase the accuracy of the process, it is equipped with a movable ruler with a keyboard and needles installed in it.

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