Abstract: An armed-state detector for the testing of "live" antitank mines is discld. The invention allows a user to determine, from a safe distance, if a mine is in an "active" state. A pole mounted sensor array is placed over the mine to sample the weak repetitive magnetic field that emanates from "active" mines. A hand-held, battery powered, detector box provides an audible or visual indication of whether or not the mine is "active". In addition to indicating that the mine is "active", the armed-state detector allows the user to determine the angular orientation of the magnetometer common to all antitank mines. The detector also provides a means whereby limited diagnostics can be performed on an unexploded mine. With the armed-state detector the user can determine if the fuze of an unexploded mine has been "killed" outright, or has merely failed to respond to the test stimulus.

Abstract: A system uses laser optic technology for non-obtrusive monitoring of movements a missile control surface undergoing electromagnetic testing. The system includes a laser source, a detector positioned opposite the laser source, an attenuator assembly positioned between the laser source and the detector, and a recorder for recording data processed by the detector. The attenuator assembly consists of a framed translucent gray scale shaded window mounted on a block member, which in turn is mounted to the missile control surface. The control surface is a pivotally mounted canard member on the missile body. Generated laser beams project onto the gray scale shaded window. The gray scale shading affects the intensity of the directed laser beams (darker areas attenuate more light and lighter areas allow more light to pass through).

Abstract: A variable pulley torque drive system comprising a pair of flexible straps, each connected at one end to a pivot on a drive member or a movable pulley sheave, and at the other end to the other of either the movable sheave or drive member, the straps being in tension when driving and flexed and deflected to compression in the undriven mode.

Abstract: A metal chain-belt for drivingly connecting the pulleys of a pulley transmission, each pulley of which is composed of a pair of flanges, the chain-belt comprising a carrier composed of interleaved sets of links and pulley flange engaging members, each of which is a pair of back-to-back joined C-shaped member, the arms of the latter engaging the pulley flanges. The longitudinal length of the top arms of a pair of members substantially equals the pitch of the chain; the longitudinal length of the bottom arms is less to permit the belt to articulate.

Abstract: A sewing machine wherein the various stitch performing instrumentalities are driven by Cardan gear means. Particular sewing part mechanisms are associated with each of said Cardan gear means to produce the desired stitch. Both said sewing part mechanisms and said Cardan gear means being removable, and interchangeable within the frame of the sewing machine.

Abstract: A Cardan gear assembly wherein rotary input motion of the main shaft is converted to elliptical output at the Cardan gear output centerpoint. The Cardan gear output centerpoint is connected via a ball and a pin slideable therethrough to a support having a work performing instrumentality arranged at its distal end. During operation, the elliptical output motion of the Cardan gear output centerpoint is transmuted into three dimensional, elliptical like motion at the tip of the work performing instrumentality.

Abstract: The output centerpoint of a Cardan gear mechanism is connected via a ball and a pin slideable therethrough to a lever which in turn carries a looper. Because the major axis of the lever and the axis swept out by the output centerpoint are skewed the lever is reciprocated back and forth along its own major axis while being rotated therearound. This results in the looper being swept back and forth along part of a generally helical-like path.

Abstract: A Cardan gear assembly wherein rotary input of the main shaft is converted to elliptical output at the output centerpoint. A force transfer means connects the output centerpoint to a means supporting a work performing instrumentality. Thus during operation the work performing instrumentality is driven through an elliptical like curve.