DE1791518U - WRITING DEVICE FOR WRITING ON PHOTOGRAPHICAL MATERIAL. - Google Patents

Description

hreib; erätzumchri.ften When taking photographs:, in particular LO when making series recordings, there is often the t tion of the recordings in some way before development to mark. Such a marking has hitherto mostly been carried out by writings of the exposed photographic plates or films made with pencil or by scratching the layer.

Writing in pencil is very unreliable as it often becomes illegible during development and fusing. The scratching is again cumbersome. There are also other marking methods in use, each of which but all have the disadvantage that they are very cumbersome to are supplied. I. The present innovation avoids this disadvantage by creating a handy writing implement that works with light, which it allows the photographic material to be written on before processing.

The writing instrument according to the present innovation consists of l, one rod-shaped housing, which contains a battery;, an incandescent lamp and a fine Light exit opening having tube and t a for connecting the battery Contains switch serving with the incandescent lamp. It is useful to use the light exit tube axial to be displaceable and to be connected to the switch so that it is pressed on the tip of the light emission tube on the surface to be labeled will.

When writing on photographic material using this new The normal writing pressure with a ballpoint pen is sufficient for the writing instrument Paper is guided to produce a fine beam of light from the light exit opening of the device to let out. This light beam goes out when the pressure is released immediately. During development, the light writing becomes visible, so that the photographic Material is marked indelibly.

The innovation is described below with reference to an exemplary embodiment illustrative figure explained in more detail.

As can be seen from this figure, the new writing instrument consists of a rod-shaped housing 1, the front part 2 of which can be unscrewed. The case 1 contains a battery 3, which by means of a spiral spring 4 on a contact screw 5 is pressed.

An incandescent lamp 6 is axially displaceable in the tip 2 of the housing arranged. The socket 11 of the incandescent lamp 6 is held in a plate 7, which is pressed forward by means of an axially acting spiral spring 8.

The incandescent lamp 6 is surrounded by an axially displaceable tube 9, which opens into a fine light exit opening 10.

When writing on photographic material, the device will also use the opening 10 of the tube 9 with normal writing pressure on the to be labeled Pad put on. As a result of the writing pressure, the plate 7 is counteracted the spiral spring 8 is pressed backwards until the socket 11 of the incandescent lamp 6 rests against screw 5. At that moment the lightbulb lights up and it a fine beam of light penetrates from the light exit opening 10.

Immediately after releasing the pressure to write, the Spring 8, the socket 11 of the light bulb separated from the screw 5 and the light bulb goes out.

It is useful to make the tube 9 replaceable to by Choice of different light exit openings to be able to change the font width.

Claims (1)

Protection claims 1. Writing implement for writing on photographic Material before developing, indicated by a rod-shaped? a battery an incandescent lamp (6) and one having a fine light exit opening (10) Tube (9) and a switch used to connect the battery to the light bulb containing housing (1, 2). 2. Writing implement according to claim 1, characterized by an axially displaceably mounted light exit tube (9) which actuates the switch when the tip is pressed onto the substrate to be labeled. 3. Writing implement according to claim 1 and 2, characterized in that CD that the light outlet tube (9) is replaceable. 4. Writing implement according to claim 1 and 2, characterized in that the switch consists of two contacts (5-11) and one in the direction of the housing axis acting, the contacts in the idle state separating the spiral spring (8).