Abstract: Discloses a proximity detection system mounted in combination with a TV receiver adapted to disrupt the programs of the receiver at the times when objects of at least the dimensions of children are positioned within a designated distance from the television picture. Detection system includes actuation means supplying electrical power to energize detection system. An acoustic pulse transducer means produces discrete periodic acoustic pulses into the viewing area and detects acoustic signals reflected back from the viewing area. A comparator means receives a signal corresponding to each of electrical pulses and echo signals and produces an actuating signal as a function of the distance between the transducer and target object. A receiver program disruption means operates to disrupt the TV program during such time when object is within a designated distance from the transducer.

Abstract: Discloses an improved instrument dial illuminating system including a light transmitting optical element formed with a thickness diminishing in the vicinity of one edge of the optical element to the vicinity of an opposite edge of the element and with a prescribed generally convex surface extending from the thick edge to across the element. Profile is of configuration prescribed to cause light rays refracted within the element from a light source to be reflected from such surface at angles closer to normal with respect to a dial face located adjacent to the light source. Such surface of optical element may be formed with a localized regional surface located intermediate the edges of such element and formed of configuration designated to cause light rays refracted within such optical element from said light source to be reflected from such regional surface at angles closer to normal with respect to such dial face.

Abstract: Discloses a convertible necktie structure having a triangular knot body defining a generally cylindrical socket extending into a first angle of the body and releasable strap connection elements extending from the other two angles of the body with a first fabric draped across a generally convex front of the body and around the two sides of the body which extend from the socket to each of the other two angles. A fabric retaining element defined by the body retains the fabric in draped position. A generally cylindrical plug fitted and latched into the socket grasps a necktie streamer provided of a second fabric to complete the appearance of a necktie formed of the first fabric and the second fabric. A retaining neck strap releasably connects to the strap connection elements. The fabric retainer elements are hooking pins defined by the body and hooked into the first fabric.

Abstract: Improvement in free point indicators disclosed in U.S. Pat. No. 3,690,163. Discloses new strain sensing system having all electrical/electronic components, other than coil and diode components, located at earth's surface remote from high temperatures and shock loading. Includes a toroidal armature within the downhole tool having coils or windings to generate a pulsating magnetic flux field developed by an alternating current. A U-shaped permanent magnet is disposed such that a portion of its constant magnetic flux field occupies physical space common with a portion of the pulsating magnetic flux field for mutual influence. A diode provided in series with each winding limits electrical current passing through each winding to pulsating DC. The constant flux of the magnet and the pulsating flux of the coils are relatively positioned in opposing sense whereby the current passing through each winding is of designated magnitude.