DE428120C - Card holders for use in aircraft - Google Patents

Description

Card holders for use in aircraft. Those in planes too The maps used have to be folded up in order to be sufficiently legible «-Ground, which means that the overview of the route on the map is lost and a certain disruptive expenditure of time is always required, uni (read at the respective summary of the card with the card field above to replace another fold of the card with a different card field.

The new invention helps both disadvantages in a peculiar way away. According to the invention, a special card holder is used which has a map section exchangeable and, with graduation -; see. as a turntable is located above a table, on (lein (direction of flight of the aircraft or the aircraft axis is marked. A (nasty direction also I parallel Slider or a cover disk provided with a parallel system of lines are permitted it, the line to be overflown on the map, corresponding in the direction of flight is set to display without having to, as before on the map to draw the flight direction to be observed and the map for later use to make them more or less unusable.

The drawing shows an exemplary embodiment in a very schematic representation of the subject matter of the invention in the basic outline.

The map to be used is still sufficient in rectangles manageable and manageable size, and there are at the edge of these rectangles the intersection lines of the cities, between which flights run should be noted.

For safe handling and retention, the map excerpts are a appropriately glued to cardboard h and on the resulting edge the front (-Learning to cut up the map, marked connecting lines are drawn and with the associated city names, as indicated at c.

This card is carried - interchangeably - by a round disc d, which is graduated clockwise from o to 36o °. The fastening device for the card on the Scheil-e (slide-in fold or the like) is designed and arranged in such a way that that the north direction of the map coincides with the o ° direction of the disc. the The card's disc can be rotated around its center on a table e. On your table e there are marks f in the direction of the central axis of the aircraft or the direction of flight. The marks point in their extension to the center of the disc.

A transparent plate (glass plate) is placed over the pane and map, in which lines are carved in the direction of flight and perpendicular to it or otherwise are set.

The distance between the lines is appropriate to the scale of the map in a certain ratio.

Instead of the glass plate or the like (not shown), a Glass slide g can be used, indicated by dash-dotted lines in the drawing is indicated and is displaceable along guides g 'perpendicular to the flight direction is. This slide bears a line in the direction of flight and, if necessary, vertical to do this, distance lines.

The new device is used in the following way: The pilot has the turntable or map rosette with the map and compass you just need h lie in front of you. He now turns the disc d with the card a so that you duss the one on the edge Line c of the take-off and landing area indicated on the map parallel to the Longitudinal direction of the aircraft is. Then the stroke of the slider is over this moved to the flying line, and the reading on the graduation of the disk d Angular degrees are flown according to the compass.

Is used according to the shortest distance between the take-off and landing sites, i.e. flown in a straight line, the turntable does not need to be used during the flight to be adjusted, and when the card sheets are changed, the new one comes in each time Map without further ado in the right direction. It is then only necessary to use the slide or the like. To squint over the lines on the edge of the map to check the flight easy to follow on the map, without being on the map itself later somehow disturbing lines or the like remain: en.

Instead of cutting a larger card into smaller rectangles and then to provide these with a 1 marking edge by sticking them on a cardboard box, Of course, you can also use correspondingly small and bordered map sheets print, on which the most important airlines are noted in the margin.

It is always essential that the airline is not a line across the the actual card needs to be drawn, but only by means of notes, lines and the like is designated on the edge of the card, which correspond to the card in the direction of flight is set, `vorauf the slider o. the like. On the flight direction inatke on the edge of the map is set and now the route to be taken is clearly shown on the map Way, without covering or writing on the map itself got to.

So one and the same card sheet can be used one after the other for flights different directions can be used without becoming confusing.

Claims (3)

PATENT-ANsPT.ZTTCI3E: i. Card holder for use in aircraft, essentially consisting of an interchangeable device with a device for holding on Map sheets provided turntable with graduation over a table on which the longitudinal axis of the aircraft is indicated. 2. Card holder according to Anspitach r, marked by a system located above the card (attached to glass or the like) Vehicle axis of parallel lines. 3. Card holder according to claim r and 2, characterized by means of a slide positioned above the map and parallel to the aircraft axis. d. Card sheet for the card holder according to claim r, characterized by an edge, on which the directions of the most important flight routes are marked.