DE617997C - Process for the production of changeable plate capacitors, in particular rotary capacitors, in which the fixed and movable plates are layered together - Google Patents

Description

Process for the production of changeable panels, in particular Rotary capacitors in which the fixed and moving plates are layered together The invention relates to a method for the production of changeable panels, especially variable capacitors. The sheet metal stacks are usually the result of the known process the moving part for itself and the laminated cores of the fixed part for itself made and then both packages assembled. Here it is extraordinary difficult, with certainty the required capacity and on which the calculation is based to obtain. The inevitable deviations of the panel thickness from that of the calculation bring the underlying value, unforeseen deviations in the distance between the plates and thus the capacity with it.

It has already been suggested that the fixed and the 'movable' Layer the plates of the capacitor together with spacers in between and then to hold onto their fasteners in this position. This will ; achieves that regardless of the use of spacer plates of the same thickness of the thickness of the individual capacitor plates, the same distance between a fixed and the adjacent movable plate and therefore with certainty the desired capacitance value of the capacitor is obtained.

However, as the fixed plates and the movable plates do not have the same external shape, full support of the Spacer plates so that when layering the capacitor plates or when attaching them on their fastening parts, the plates are in those places where the Shapes of the two types of panels do not overlap and can easily bend. Around To avoid this, the fixed and movable plates are according to the invention initially designed so that they have approximately the same external shape. After Fixing the locking and moving plates on their mounting parts are then the parts of the projecting over the operational shape of the plates Plates taken away. One can when punching the capacitor. already plate incisions punch into the plates, which means that the remaining parts can be removed after the Facilitate assembly.

With this manufacturing process you can also get correct capacitance values behave if the spacer plates are not exactly the same thickness. It can be prove mathematically that it is sufficient if the sum of all plate distances is one Capacitor equal to the sum of the necessary to achieve a certain capacity calculated individual distances. So it is completely sufficient if, according to another advantageous embodiment of the method according to the invention, the spacer plates for a capacitor be selected so that the thickness or the The combined weight of all the spacer plates of a capacitor is so great like the calculated total: mtdieke or the calculated total weight of all spacer plates.

Claims (2)

. PATENT CLAIMS: i. Process for the production of changeable Plate capacitors, in particular rotary capacitors. that of the fixed and movable ones Plates are layered together, characterized in that the fixed and movable plates are first made to be approximately the same have external shape and that after the attachment of the fixed and the movable Flatten on their fasteners the over the operational shape of the plates protruding plate parts are removed. 2. The method according to claim i, characterized characterized in that the between the fixed and the movable plates for Layering spacers used consist of plates that @ohrne consideration so put together for each capacitor on the thickness and weight of the individual plates - that the thickness or weight of all the spacer plates of the capacitor taken together are as large as the calculated total thickness or the calculated total weight of all spacer plates.