Abstract: A mechanical foreign object detector upstream from the feed roll of a carding machine faithfully detects minute hard objects in the lap which could damage the lickerin or other components of the card. Spring-loaded detector pins penetrate through the lap and contact foreign objects on an apertured plate beneath the lap. Such pins rise and contact a wire connected in a stop motion circuit which immediately stops the operation of the doffer and the feed roll before any damage can occur. A visual and/or audible indicator alerts the operator to the presence of a foreign object or objects which the operator removes by hand before restarting the card by operation of a key-operated reset switch in the circuit. The mechanical detector apparatus includes a power drive which is synchronized with the operation of the feed roll of the card.

Abstract: A device installable on all sizes of vehicle wheels, such as automotive and aircraft, to automatically and substantially permanently compensate for wheel imbalance due to uneven tire wear, unbalanced tire construction, and other known factors which effect wheel balance. Centrifugal force activated, freely circulating weight components within the annular tube body of the device tend to remain at the balanced wheel positions when the wheel is at rest. The device is applicable to single or dual wheels and other rotating bodies subject to dynamic imbalance.