Abstract: In an image pick-up and display apparatus comprising a liquid crystal display device (34), an image pick-up device (24) and a partially transparent mirror (36), the display device is arranged at the front side of the apparatus (30), the partially transparent mirror is disposed behind this device (32) in light paths respectively between the display device and the light source (38) for illuminating this display device and between the image pick-up device (24) and the display device (32), so that the received image can be displayed in a natural way and the optical information of a subject in front of the apparatus is not disturbed by light from the light source.

Abstract: A color display apparatus which stores the color information of characters to be displayed in three storage planes (4R, 4C, 4B) of a character generator so that this information can be used in a display controller (21) in such a way that high-quality characters are displayed on a display panel. The information is stored so that different sequences of 3-bit color dots can be displayed.

Abstract: A feed regulator of a sewing machine capable of varying a seam length at the stitching operation employs a first driving device for swingably driving a feed regulating table by way of a link mechanism so that a feed dog can switch the feed direction, whereby a reverse stitching operation can be performed in the same way as the conventional feed regulator. The feed regulator also employs a link mechanism having one surface for retaining the projection of the link member having a slit, one surface of which can retain the projection of the link mechanism, and a second driving device for driving the link member, whereby the reverse stitching operation can be performed by second driving device in the arbitrary seam length.

Abstract: A magnetic particle type electromagnetic clutch has two clutch discs so disposed that the two discs can be electromagnetically connected together and disconnected. In a space between the two discs are charged magnetic particles. When an excitation current is run through the excitation coil disposed near the two discs to produce a magnetic flux, the two discs and magnetic particles are magnetized to be connected in unison, thereby transmitting a torque from the drive shaft to the driven shaft. The two discs are each secured to the tip end of the shafts. The shaft has two groups of magnetic layers which are rigidly affixed to the shaft and axially spaced. Each of the groups of magnetic layers is directed + 45 degrees or - 45 degrees with respect to the axis of the shaft. When the shafts start to rotate, magnetostriction is developed in the respective magnetic layers resulting in a change in permeability.

Abstract: A slackened needle thread assuring unit includes a thread tension member mounted on a side wall of a frame secured to the bed of a sewing machine. A thread takeup is positioned above the thread tension member. A needle/bobbin thread cutter is positioned apart from and under the frame for cutting a needle thread. A thread end holder holds an end of the thread to be cut by the needle/bobbin thread cutter. A thread guide extending across the front portion of the frame has one end supported by a support plate and the other free end defining a hook. A drive mechanism supported by the support plate reciprocally moves the hook in the direction substantially perpendicular to the threading direction of the needle thread.

Abstract: A thread cutting unit cooperating with the bed of a sewing machine includes a lower shaft, a cutting knife and a loop spreading plate respectively fixed to the lower shaft and positioned adjacent to the hook. The thread cutting knife and the loop spreading plate cross each other in a space between the hook and the throat plate. The thread cutting unit is provided with a thread cutting driving unit which comprises a thread cutting knife driving shaft, a loop spreading plate driving shaft, a rotational motion transmission device, a thread cutting supporting member carrying thread cutting knife, a first turnable interlocking mechanism and a second turnable interlocking mechanism. The thread cutting supporting member is rotatably supported on the bed.

Abstract: A feeding adjusting dial has at an inner circumferential surface thereof a plurality of teeth fixed to a stopper defined in the body of an arm of the sewing machine at both sides of the feeding rate adjusting shaft meshes with one of the plurality of teeth of the feeding rate adjusting dial. The feeding rate adjusting shaft is screwed into the body of the arm at a portion thereof and has a tip end thereof brought into contact with a cam surface of a feeding adjusting cam. The feeding adjusting cam is connected to a feeding adjusting table via a link. The feeding rate adjusting shaft comprises a first member, a second member and an elastic coupling for connecting the first and second members. One of the first and second members is screwed into the body of the arm of the sewing machine.

Abstract: A flat motor includes a rear bracket 1 of magnetic material, a permanent magnet 2 fixed to an end of the rear bracket, a front bracket 3 of magnetic material facing the permanent magnet, an armature 4 having a coil 5 thereof, a rotary shaft 7 for rotatably supporting the armature between the front bracket and the permanent magnet, and a commutator 6 pressure-fixed on the rotary shaft. A rotor 15 of a rotation detector 11 is fixed on the rotary shaft and has teeth 15c along its outer periphery. A stator 11d has an inner periphery facing the rotor teeth, a cover member 11h houses a magnet 11c and a coil 11b, the cover member being affixed to the rear bracket, and coupling members 6a, 15b establish a direct connection between the rotor and the commutator.

Abstract: A magnetic head shifting apparatus for flexible disk memory system wherein kinetic energy of an arm is absorbed by means of a cushioning material interposed between the arm and an abutment of a shackle rod thereby to reduce a transient period of time which is the one until the memory medium and magnetic heads reach their stable state, while damage of the memory medium is suppressed in steady state, whereby stable electromagnetic conversion characteristics can be obtained.

Abstract: A high-pure alkali permanganate is produced at a high yield by electrolytically oxidizing at a temperature of higher than 60.degree. C a caustic alkali slurry of manganese dioxide and/or an alkali penta-valent manganate having a caustic alkali concentration of 10 to 25% by weight.