DE831915C - Electrical signaling device for card feeder - Google Patents

Description

(WiGBl. P. 175)

ISSUED JULY 10, 1952

W 4416 IXb142 f

With automatic weighing feeders it can happen that due to insufficient delivery of the filling box or if the delivery to the scales was selected too slowly from the needle sheet or due to other causes due to the emptying mechanism mechanically coupled with the circulation of the card the scales are emptied before they have reached their intended target weight.

Such premature emptying of the scales, i. H. due to the resulting underweight In terms of fiber material, too little fiber material is fed to the subsequent carding machine, which, in particular in the case of multiple, unresolved repetitions of premature emptying, very detrimental to the rest of them Processing process and the finished product of the yarn.

In order to eliminate this disadvantage, according to the invention, the scales are dependent on before emptying from the weight reached in the scales such a control circuit is closed, which is an incomplete Indicates that the balance is full.

In this way, the operator of the card is immediately the first time a He was made aware of incorrect weighing and given him the opportunity to take corrective action in good time.

The drawing Fig. Ι and Fig. 2 shows an embodiment the invention a card feeder with an electric single drive. Fig. Ι shows as far as necessary for understanding the invention, the mechanical part, FIG. 2 the electrical part of the scale feeder. The drive motor for the weighing feeder is switched on by the

Temporary closing of the switch E via the switching pin e, which in turn is actuated again by the cam Kv driven by the card via its switch-on cam Ke. The contactor "is switched on via the closed switch A and the power source, which starts the drive motor via contacts not shown. Contactor .S 'continues to hold itself after opening switch E via its own account clock ί and closed switch A. The delivery of the scale Ws is now carried out so long until it reaches the desired weight in the scale. in this case, the horizontal open in known manner for the emptying of the fiber material, wherein before the scale is lowered and the balance arm through pin a switch A is opened. contactor. S 'is thereby de-energized, it falls off, and the engine is stopped. the supply of the balance is interrupted. Immediately before the beginning of the emptying of the scale, wherein the drain mechanism Em au in the Xockenraste the cam Kv is incident, is the adjustable Cam pin Kk actuates a switching pin k which temporarily closes switch K. This is in the case of a proper delivery to Waa ge without further effect. Since switch A has already been opened depending on the target weight reached in the balance, a circuit for the excitation of the relay H cannot be established. After the scales have been emptied, the drive motor for the card feeder is switched on again by means of the cam Kv, its cams Ke, switch pin e, switch E and contactor S.

However, if switch A was not opened due to the target weight not being reached before switch AT is closed by Xockenstift Kk and pin k , the following occurs: Switch A had not yet opened, contactor S is still energized. Switch AT is closed by Xockenstift Kk. The following circuit for relay H is now closed: power source, s, A, K, H, power source. Relay H responds and maintains its own contact h I and the reset button RU.

In parallel to the holding circuit of the relay H , an optical signal Li is switched on at the balance feeder as a sign for the operator that the balance is underweight. Simultaneously with the light signal, an acoustic signal Hu common to several feeders is expediently switched on via a further contact h II of the relay H. The operating personnel can then bring the relay H down by opening the reset button Rii and delete the signals.

After the cam pin Kk has passed and the switch K is reopened, the balance beam is pushed down to a stop by the j switch-off position of the cam disc A'z ¹ and thus switch ^ is opened, which inevitably results in the delivery of the balance, regardless of the not target weight reached, while the scales are suspended during emptying. Si represent fuses.

Claims (6)

PATE N TA N SPR LT. Η Ε: 1. Automatic weighing machine, especially for carding, characterized in that Before emptying the scales, a control electronics circuit is made depending on the target weight in the scales which indicates that the balance is incomplete. 2. Automatic weight feeder according to claim ι, characterized in that switching means (Kv, Kk, K) are provided, which come into effect immediately before emptying the scales. close a test circuit, which is also controlled by switching means (A) that are dependent on the target weight in the scales. 3. Automatic scales feeder according to claim ι and 2, characterized in that if the target weight (underweight) is not reached in the scales by the switching means (Kk, K) coming into effect immediately before the start of emptying, a monitoring relay (H) is energized, which optical (Li) and / or acoustic signals (Hu) switches on. 4. Automatic weight feeder according to claim ι to 3, characterized in that the switching means (A ") coming into effect immediately before the start of emptying the scales are actuated by an adjustable cam pin (Kk) on the cam disk (Kv) continuously driven by the card . 5. Automatic weight feeder according to claim ι to 4, characterized in that after the end of the stimulus circuit of the monitoring relay (H) temporarily closed by the cam (Kv ) this keeps itself through its own contact (h I) and a reset button (RU). 6. Automatic weight feeder according to claim ι to 5, characterized in that the cam disk (Kv) has a point (Ke) for switching on the drive, a point for switching off the drive and a point immediately penultimate lying (Kk) for closing the control circuit. 1 sheet of drawings Q 5221 6.