Abstract: A compensating thread brake useful, in particular, with warping creels. The thread brake has a rotatable roller whose circumference is at least partially surrounded by and drivable by thread. The roller is connected to the rotor of a turbine. A mechanical thread tension comparator by way of its setting member, influences a throttle in the path of the turbine inlet or outlet stream. The setting member may, preferably, be a throttle plate which regulates the inlet or outlet ports of turbine T. In this manner, the thread tension may be controlled without frictional load on the threads or the need to provide seals against oil or the like. Additionally, an eddy current brake can be provided for the nominal setting of the basic thread tension.

Abstract: A spool holder having a carrier arm (7) can carry thread spools having cylindrical or conical cores (3). This arm has a contact surface (8) for the core (3) and at the distal end thereof, an angled surface (10). This angled surface diverges at the free end of the carrier arm 7. Carrier arm 7 also has a freely hanging lever(11, 13) hinged about its upper end. The lever has such a length that when the core face (4) rides on the inclined surface (10), the lever contacts the core wall. This gives rise to a secure clamping of the core during use, coupled with an automatic freeing of the empty core when the carrier arm downwardly tips.

Abstract: A manually operated apparatus for driving a member such as a tool or fastening element into the surface of a receiving material includes a device for driving the member, a base supportable on the surface into which the member is to be driven, and a holder attached to the device and pivotally connected to the base for providing a visual indication of an angular disposition of the drive axis of the device relative to the surface of the receiving material and for positioning the drive axis perpendicular to the surface.