Abstract: A fever thermometer comprises a rod-shaped housing containing at one end an lectric temperature sensor, a battery at the other end, an electronic temperature display, and an inertial switch which when actuated resets the temperature display from the measured value to a predetermined base value. The inertial switch is actuated by the same motion as that used to shake down a conventional fever thermometer.

Abstract: A method for TV recording of pictures from a moving picture film which is continuously moved relative to a recording screen, the pictures of the film each being periodically scanned linewise, whereby the moving picture frequency with respect to the scanning frequency is in a predetermined relation with respect to each other for the purpose of achieving a predetermined recording picture frequency, for example of 50 pictures per second. With different moving picture frequencies (f.sub.L) the following relationship with respect to the scanning frequency (f.sub.A) is maintained:f.sub.L +f.sub.A =+Fin which F means the desired recording picture frequency, whereby at least with one of the moving picture frequencies which is used, fractions of a picture are scanned per scanning period, which fractions differ from 1 picture, particularly exceeding 1.

Abstract: A photographing- or playback- device for a continuous photo picture carrier which is moved along a guide track by means of a drive device, particularly for motion picture film, with an optical imaging system and at least one mirrored surface which is movable about an axis, particularly a polygonal set of mirrors for the optical equalization of the image shifting as well as a light source if necessary. In the optical path between the guide track of the picture carrier and the mirror there is provided a partially-mirrored surface, which surface is inclined relative to the optical path and forms a part of an autocollimation system. By the partially-mirrored surface a part of the beam rays is deflectable, whereby the axis of the optical imaging system runs inclined or transverse relative to the beam axis (which beam axis runs between the guide track and the mirror) and runs to, or respectively from, the partially-mirrored surface, and the axis of the mirror also is arranged on the beam axis.

Abstract: In order to establish a predetermined position of focusing or focal-length adjustment for an optical objective, a mechanism for the axial shifting of one or more lens members has a lost-motion zone in its operating range in which a continuing displacement of a control element does not change the focal length and/or distance of the objective. The halting of the lens shift (or, possibly, a compensatory displacement of an otherwise stationary lens member) can be brought about mechanically, with the aid of suitably shaped cam tracks, or electromechanically, via analog or binary position sensors. Arrival of the adjusting mechanism in the lost-motion zone may be signaled to the user by a detent, by a change in frictional resistance, or by a visual or acoustical indicator.

Abstract: The invention relates generally to the processing of a data medium, in which an additional sound sequence is recorded or mixed in gaps between sections occupied by an original recording which is to remain on the data medium.

Abstract: A camera having a forward lens unit including a displaceable lens for providing a variable focal length, a film plane, a base objective having a fixed focal length, and an aperture diaphragm between the displaceable lens and the film plane together with automatic drive means for displacing the base objective axially in direct proportion to the diaphragm stop of the aperture diaphragm to thereby shift the image plane defined by the forward lens unit and the base objective and provide a substantially constant circle of diffusion at the film plane.

Abstract: A film strip is continuously advanced past a film gate of a camera or a projector while light coming from the strip through the film gate is reflected by a pivotable mirror keeping a beam of light trained upon a specific area of the strip, i.e., a frame, during a major part of a recurrent operating cycle. The mirror is reciprocated during each operating cycle under the control of an electrical signal generator synchronized with the strip-feeding mechanism, either directly or through markings (e.g., perforations) on the film strip, and performs a relatively slow forward sweep followed by a relatively fast return sweep, the latter being effected by a pulse of one polarity immediately followed by a pulse of opposite polarity arresting the mirror drive. In one embodiment (FIG.