DE1900269U - ARRANGEMENT FOR AUTOMATICALLY STOPPING DRIVE MOTORS. - Google Patents

Description

Pr. W. Bierrefh

Frankfurt / Main

Tel. 55 84 87

fosti. 11051

USED PATTERN

Applicant's SABÄ. 'Black Forest Apparatus-B _a u ~

Institution August Schwer Sons G-.m.b.H "

Villingen (Schwarzw,)

Description! Arrangement for automatic shutdown of drive motors

The subject-matter relates to an arrangement for automatic stop of an engine drive for bobbin when a overrun of their Drehachse.behindert is distinguished · * borrowed for Magnetton- BEZW _e sound film, or the like -Geräte.Bei such Spulentriebvorriehtungen are wire or ribbon ends into bobbins for example, by means of clamping devices of various kinds, so that there is a risk, especially towards the end of the run, that the bobbins are exposed to excessive tensile forces, if precautions are not taken, switch off the motor immediately to prevent regression. Jamming j Fe st hook or similar circumstances j aii any winding point also too high tensile forces occur with the motor drive running, so that the motor should also be stopped automatically and immediately, as automatically as possible, since it tears towards the center of the bobbin winder can be more serious *

In the case of magnetic tape recorders, it is

it is known to provide the ends of the tape with a switching foil in such a way that when it has expired Tape over electrical contacts of the motor drive is switched off · Especially with tape cassettes, however, it is a question of reels with small through » meßers, so that the thinnest possible tapes for use come - to achieve, long playing time. In the case of low tape thicknesses, however, it again has an effect the application of such switching foils is unfavorable, as they apply too much, which is synchronous respectively. Expiration - the tapes generally awake again " share results »

The innovation takes a different approach to the creation of an automatic standstill of a motor drive for coil windings that are hindered in the process in general _{5 and is characterized by periodically acting interrupter contact disk 3,} which is rigidly connected to the axis of rotation of a coil body and located in the motor circuit, which inevitably puts the motor out of operation due to the coil axis held in the winding process puts·

The essence of the subject of protection is its possible use for magnetic tape. " Coil operation described in the figures for example »

It shows Fig.l a tape reel with motor »

drive and new type of breaker contact disc, and,

Fig. Z a contact disc alone *

In Figure 1 is shown on a reel body 2 running tape 1 · According to the innovation, an under-breaker contact disk h is firmly connected to the axis of rotation 3 by screwing. Lach Figure v2 are on the contact disk Λ in an electrically conductive connection with each other, segment-like: ® distributed contact fields 6 with insulating surfaces 7 in between are shown, which radially to the disk

ι, 05511 * -6.6.6Ί

In the middle of the disk are continuously connected to one another by means of a conductive circular ring surface 6 ¹ , on both sides of the disk circumference spring contact arms 8 and 8 'grip over the disk h by dragging or, as shown in FIG. 1, above and below the disk * f. The DC voltage supplied via the spring contact arm 8 is chopped up by the interrupter disk Λ · _? and taken from the disk as impulse voltage by the other spring ^{contact arm 8 1} , fed via a known control circuit 9 to the motor Io for its speed control _? so that due to the failure of this pulse voltage due to stationary bobbin 2 and inevitably coupled ter interrupter disk h _f the motor Io automatically comes to a standstill, regardless of which circumstance the coil winding process is disturbed _r respectively. on the other hand, the bobbin winder is prevented from continuing to run by its end clamped on the bobbin 2

Protection claims,

Claims (2)

P. A. 4 O 5 51 Protection claims 1. Arrangement for the automatic shutdown of drive motors for in the process on bobbins handicapped rolls of any material shape, characterized by rigid with the Axis of rotation (3) of a coil former (2) connected to the motor circuit in the perio » undercurrent contact washer 0+), soft by the bobbin axis held in the winding process <fj $) inevitably the motor (Io) • decommissioned. 2. Arrangement according to claim 1, characterized by a disk 0+) with segment-like distributed, mutually electrically conductively connected contact fields (6) with each intervening Ünterbrecher-Isolier- - surfaces (7). 3. Arrangement according to Claim 2, characterized by converging radially towards the center of the disk (h) in a circular ring surface (6!) . . Contact conductor surfaces (6), ^ * Arrangement according to claim 1 or one of the following? characterized by spring contact arms C8j8 «) engaging on both sides of an interrupter disk (h).