DE99819C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention relates to a process for the production of chains that secure the tails, and mainly of the type of chain curled on the long sides of the links; the purpose of the invention is the securing of the welding against the yielding of the same under load the trowel; even if an undiscovered, not completely healthy swerve should be present, the Celtic link should still have a secure hold at the welding point to prevent the ketle from tearing apart.

It occurs more easily with Celtic links curled on the side than on the ends curly members that the curvature is imperfect, but often only in such Precisely, that the error is not discovered during the test loading, but rather itself only gradually emerges, unfortunately perhaps only as the cause of one that has arisen Damage.

The emergence of such damage, despite undiscovered incomplete welding, should the present invention prevent on the one hand in that they provide greater security offers for perfect welding, on the other hand, that it eliminates the shortcomings and dangers of one to compensate for any defective welding that still occurs.

According to the present method, the two tail surfaces of one are pre-bent Each link is provided with matching teeth in such a way that the tooth flanks lying across or almost across the direction of pull, either straight, crooked or Angular teeth which partly protrude, partly recessed, on the surface of the tail, but that those at one end of the tail fit into those at the other, as if those at one end teeth and gaps located the plastic impression of the teeth located at the other end of the tail Teeth and gaps formed.

These pre-bent chain links prepared in this way will then form a welding surface contact during welding, which, the Similar to the engagement of two toothed rods, so it has mutually engaging tail ends, that the toothing goes through even if it does not have healthy welding everywhere Longitudinal pulling effect cannot deviate from one another, an axial displacement of the two Partly does not take place in relation to the central axis of the chain iron.

The accompanying drawing represents the type of dressing used in this procedure Chain links resp. their tail ends in one embodiment.

It is clear that this depends on the strength and size of the chain links, as well as on the Chosen chain link shape the type of toothing can be varied within wide limits.

Fig. Ι is a view of a laid flat, prepared for welding, open chain link.

Figure 2 is a view of one such link

seen from the side and with dash-dot indication of the. later line of contact of the Tail ends.

Fig. 4 is a view of a finished, laterally curved chain link with an indication of the wedge-shaped tooth flanks and gaps.

The toothing of the two tail ends can be done in any way by forging in

(2nd edition, issued May 28, J902.)

Claims (1)

Die, stamping or by pressing, milling can be produced in a known manner. It is according to Fig. I, 2 and. 3 shows a rough, only one projection BB ¹ and one recess AA ¹ , here delimited in a straight line and with tooth flanks running transversely to the longitudinal direction of the chain iron. The proportions of the tooth height to the diameter of the chain iron are expediently chosen in such a way that the excess material present to replace the burn-off and the metal that is present in the stretching process during welding is in the tooth shapes and the back on which they sit. The bending of the chain link visible in Figs. 2 and 3 is taken sufficiently large to allow the chain iron strength to pass between the teeth B and B ^{1 protruding on each tail end;} that they then meet in the parallel position of the tail surfaces belonging to one another. The completed curve is illustrated in FIG. 2 by the engagement form ec to df indicated by the dotted lines. If there are not healthy spots in the course of the tail surfaces of α ce or b df , then in the chain test, respectively. at a load that exceeds the strength of the adhesive surfaces, there is a tendency to stretch these areas, but stretching is prevented by the hook contact lying normal to the pulling direction or the toothing c ab d . The advantage offered by this can be seen in vain if it is taken into account that the tensile force in the toothed tail piece cannot increase beyond ¹ ^ ₂ P if P is the total effective tensile force, while in the whole chain iron in the earlier welding process without toothing, at the start of the stretching of the faulty curve, the moment for bending the chain iron increases steadily and the chain finally ripens. A useful design of the teeth is the wedge shape indicated in Fig. 4, because here with the correct choice of tooth width and tooth gap width when the two tail ends are pushed together, the tooth flanks are also pressed against each other in the longitudinal direction and thus causes the welding of these surfaces with all the greater certainty will. As is also indicated in Fig. 4 by dotted lines, the meshing of the teeth can also with finer teeth of any shape. Tooth flanks with transverse to the chain iron axis respectively. to the direction of pull arcuate or angular 'shape, as indicated on the left side of Fig. 1, also prevent sideways evasion of the tail ends in the event of an approximately imperfect curve. Godfather ν τ-An speuch: A procedure to secure the welding point of the chain links against separation by tension, consisting in the fact that on the tail surfaces of the tail ends toothing transversely to the direction of pull be arranged in such a way that when the open, tail-warm chain links are knocked together, the teeth on one tail surface into the tooth gaps of the other and intervene in reverse. 1 sheet of drawings.