DE419715C - Method of assembling electrical apparatus - Google Patents

Description

Method of assembling -electrical apparatus. In electrical apparatus engineering, either screw or cemented connections have been used to assemble the parts with one another: however, this type of connection has so far not been able to meet the requirements of practical use in some cases.

The screw connection has z. B. in the attachment of plug-in contact bushes and pins the disadvantage of the rigid fastening n clever , through which the corresponding parts often do not fit together enough and therefore do not have sufficient contact. The same inconvenience can occur with the putty fastening of these parts, while in this type of fastening another deficiency lies in the often unclean or poor fastening caused by improper putty material.

To eliminate the above deficiencies, the invention is a new one Methods of assembling parts of electrical apparatus using heretofore Known spreading organs suggested. By doing this, one becomes practical non-detachable connection achieved in which the parts, although they are due to little play in the spreader one oscillating or sideways movement to each other can perform a firm hold against the tensile forces that occur as a result have increased spreading pressure and due to the sharp edges of the spreader. The assembly of the parts is very easy with this method and always guaranteed a clean execution.

Compared to the previous screw fastening, the new Execution still has the further advantage that the metal parts are also in blind holes of the insulating parts can be attached, which is particularly important in the case of electrical connection contacts Apparatus is advantageous in which a implementation of the metal parts z. B. for the purpose Installation directly on a building wall because of the possible risk of earth faults is not wanted.

The invention is illustrated in Figures i through 13, for example and consists essentially of a fixed or removable on the metal part Spreader, which has outwardly directed prongs or sharp edges and sprung across the fastening direction, while it is in one for the special Intended use appropriately shaped opening of the insulating part by pushing it in can be permanently attached.

As a spreading member, for example, a resilient plate (Fig. I) with a central attachment hole a of the metal piece and laterally resilient tab find use b. The attachment of the spreader c takes place, for. B. according to AA. : 2 by riveting on the metal part d and according to Fig. 3 by screwing by means of the screw e. The hole of the insulating something must naturally be smaller than the outer dimensions of the exhaust resilient Spreizorgans in the extended position, so that the can before the metal part attached spreading member when pushing in the hole by bending thereby enabling the attachment. Pulling on the metal part increases the spreading pressure and thus the fastening of the part. To limit the inward movement of the metal part, the bottom of the blind hole, as in Fig.: 2, or z. B. in the case of deeper or through holes, an approach g- of the metal part according to Fig. 4 that bears against the insulating part f can be provided.

Another very simple attachment of the spreader to the metal part is shown in Figs. 5 to 7. The metal part of "#bb. 6 is provided with a recess or groove h, into which the spreader of Fig. 7 can be pushed by means of the slot i. Dep. 5 Shows how these parts are attached to one another.

The expansion spring n can also be fastened downwards by means of a shoulder k in Fig. 8 or a transverse pin i in Fig. 9 as well as a slip-on washer m in Fig. not shown, arranged on the part to be fastened can be done further parts.

Instead of an expansion member designed as a plate or flat spring, a round pin o (Fig. Ii) can be provided, which is inserted through a hole p in the metal part qu and thereby enables the same to be fastened in part r.

The shape of the opening of the insulating part naturally adapts to the intended use. You can z. B. round as in Fig. 12 or, to secure the metal part against rotation, angular as in Fig. 2, rectangular as in Fig. 5 or, for the use of the resilient pin o, as shown in Fig. 13. The angular shape of the opening in the insulating part does not exclude the fact that a rotary movement about its axis can also be permitted for the metal part, as is the case, for. B. is shown in Figs. 5, 8 to io. The latter arrangement would e.g. B. for rotating axes or screw pins use. can, while the non-rotatable arrangement is better for connection sockets (Fig.: 2) or plug contacts to prevent twisting of the connecting wires. Nevertheless the contacts z. B. are not rotatable with plug devices, but a pendulum movement of the contacts and thereby achieved better contact can be achieved by a certain play in the holes.

Claims (1)

PATENT-ANSPRUCI-1: Process for assembling electrical apparatus, characterized in that parts of this apparatus, such as. B. axes, contacts, etc. Like., with one immovable in the fastening direction, with prongs or sharp ones Edges equipped spreading element are provided and on the other part (e.g. Soclzel) of the apparatus can be permanently attached by pressing it into openings of the same.