SU147341A1 - Epidiascope with retractable inclined screen - Google Patents

Description

Known epidiascopes with retractable inclined screen.

In the proposed epidiacopes, in order to simultaneously realize the possibility of making a copy of the drawing on an enlarged scale without redrawing, the epididiaper head is mounted movably inside the table, the cover of which is replaced with glass used as a screen.

FIG. 1 Shows the proposed epidiascope with a retractable inclined screen; in fig. 2 - the same, in a section; in fig. 3-worm chno-belt lift, obsh, iy view.

The epidiascope according to the invention consists of a table 1, a sliding screen 2, an epidiascope 3, an elevator 4. The table with a bedside table contains two rulers 5, two guide tubes 6 and serves as a base: M for mounting a sliding screen 2 on it, a movable epidiascope 3 and elevator 4. The table is a screen for imaging on a frosted glass. The sliding screen 2 consists of two guide tubes 7 with struts and supports-frames of the sliding screen frame; drawing board 5 with frosted glass and two large-scale rulers, a drawing instrument. A fork with a screw and a wing nut is fixed on the frame of the board to fix the frame of the screen at the corresponding angle. The screen moves along guide tubes. Table 6 until it stops.

The epidiascope consists of a tube 9, a holder 10, a fan //, an bracket 12, a plug 13, a clamp 14, a holder cover 15, a reflector 16, a lamp 17, three flat mirrors 18, a reflective mirror 19, a lens 20.

The elevator comprises a bridge 21, a tension fork 22, a rack 23, a handle 24, a screw to 25, a notched belt 26, a tension roller 27, a screw 28, a bracket 29, a fork 30, a clamp 31.

No. 147341-2 The elevator provides the possibility of obtaining the required focal length of the lens head to obtain the necessary image scale. The movement of the lens head is carried out along the rack while rotating the handle.

Using the rotary plug, the epidiascope is rotated 90 ° to work on the retractable screen, and relative to the table by 353 °.

A small scale is obtained when designing an object on the table screen. In this case, an original is placed under the cover of the epidiascope holder, from which you need to get an image at the required scale. The lid is secured with a retainer, and the image in the book lights up with a light bulb. To illuminate the original are reflector "flat mirrors.

The image from the original is reflected by a mirror from which the rays are fed to the lens and then to the screen.

For the desired installation, the lens is moved into the tube axially. A sliding screen is used to obtain large scales. With the help of the elevator, the epidiascope rises with the bracket along the guide post up to the stop and turns along the bracket with the fork and is fixed with a lock in the holes on the bracket at an appropriate angle. A sliding screen board is installed perpendicular to the installed epidemiological device and secured with latches at two points.

A sheet of paper is superimposed on the ramp of the retractable glass screen, securing and turning on the epidiascope.

Subject invention

An epidiascope with a retractable inclined screen, characterized in that, in order to simultaneously realize the possibility of removing a copy of the drawing on an enlarged scale without being overwritten, the epididium head is mounted movably inside the table, the cover of which is replaced with glass used as a screen.

75

74 FIG 3