Abstract: An amplifier includes an inverter with two transistors of complementary types. The first transistor is biased through a third transistor of the same type of conductivity by a first reference voltage, the third transistor being biased by a third voltage of reference. The second transistor is biased through a fourth transistor of the same type of conductivity by a second voltage of reference, the fourth transistor being biased by a fourth voltage of reference. The first and second voltages of reference are determined so that without any alternating input signal the current in the first and second transistors of the inverter is minimum. The third and fourth voltages of reference are determined so that the equivalent resistances of the third and fourth transistors are very high.

Abstract: The timepiece comprises a detector and control circuit for the stepping motor. This circuit comprises on the one hand an amplifier including at least a MOS transistor receiving on a first terminal a voltage representative of the current in the driving coil of the motor and having a second terminal joined up to a condenser connected to one of the poles of a power source. The amplifier delivers signals representative of the current in the condenser. The circuit comprises on the other hand means connected to the amplifier for controlling the driving pulses. The circuit is easy to integrate and it has a very low power consumption.

Abstract: An integrated circuit for a time-piece including an oscillator, a frequency divider, an electronic circuit for effecting at least one auxiliary function depending on information delivered to the inputs thereof, a circuit for controlling a display and a circuit for setting the time. The integrated circuit is provided with a first group of terminals for enabling connection of the integrated circuit with external components such as a piezo-electric resonator, the display, and the time-setting circuit.

Abstract: A signal generator having a digital temperature compensation circuit contains high and low frequency quartz oscillators (HF and NF), the low frequency oscillator being used for temperature compensation. Both oscillators are manufactured such that the descending portion of the temperature dependent parabolic frequency curve of the low frequency oscillator passes through the temperature inversion point of the parabola of the high frequency oscillator.The frequencies of both oscillators are first adjusted such that the ratio thereof is inversely proportional to the ratio of the parabolic temperature coefficient, i.e., f.sub.1 :f.sub.2 =.beta..sub.2 :.beta..sub.1. Subsequently two substantially identical reference frequencies are adjusted and, by feeding back the output frequency, combined in such a manner that an output frequency independent of temperature is produced which is determined substantially by the high frequency oscillator.

Abstract: A signal generator includes a high frequency oscillator such as a quartz crystal oscillator at a frequency of 4.19 MHz, a low frequency quartz oscillator with a frequency of 32 kHz, a beat frequency generator for producing a correction signal which is transmitted to a programmable frequency divider, and an electronic switch for periodic switching of the high frequency quartz oscillator. By periodically switching-on the high frequency quartz oscillator, comparing its frequency curve with that of the low frequency quartz oscillator and and appropriately adjusting the programmable frequency divider, the advantages of long term stability, temperature of behavior and aging of a high frequency oscillator are combined with the low current consumption characteristics associated with the low frequency quartz oscillator, whereby the life of a battery powering the signal generator can be substantially extended.

Abstract: A sewing machine having a torsion spring coupling between drive and machine shaft. An engageable catch pawl acts on a stop element connected to the drive, which stop element is connected to the drive side of the coupling spring of the drive. If the catch pawl is engaged with the machine in operation and the stop element is blocked, the coupling spring is released and hence the coupling disengaged. The motor may then run down while the motor shaft is stopped resiliently in a predetermined position via the coupling spring which simultaneously the coupling spring prevents excessive forces from occurring due to inertia and excess stressing. Hence this construction permits the motor to be stopped rapidly from full operation with simple means.

Abstract: Book coverings for protecting and improving the aesthetic appearance of books of varying sizes in which an outer wrapping sheet, which may be opaque or transparent, is cut or folded to conform to the height of the book leaving end flaps for the front and rear covers, and wherein generally elongated leaflets are provided to be cut to a dimension slightly greater than the height of the book for attachment to the outer surface of the front and back cover portions of the wrapper adjacent the end flap to form a loop on the inside of the book cover, the end flap being tucked under the loop to form a finished cover. The leaflets may be opaque or transparent and may be trapezoidal in shape or rectangular. The covers are positively held by the loops on the books without direct attachment thereto.

Abstract: A method for controlling a casting and rolling mill by measuring the speed of a cast strip between the casting machine and the first following rolling mill and regulating the speed of the casting machine directly proportional to the measured speed of the cast strip. It is thus possible to avoid auxiliary equipment required in prior art systems such as pinch rolls and a continuous furnace between the casting machine and the first following rolling mill. Furthermore no loop on the cast strip is required. As a result, great reductions in capital expenditures, the energy required to operate the line and the necessary space can be obtained.

Abstract: An internally hollow package includes front, rear and side panels. A pair of aligned openings are cut in the front and rear panels leaving corresponding flaps contiguous with an end panel. The flaps and the end panel abut and secure the heads of a set of razors. The razor handles are positioned between the front and rear panels and extend toward an opposite end panel having an opening formed therein through which the razor handles pass and remain secured. Two sets of razors are oppositely positioned in symmetrical relation to each other thus permitting the package to be hung straight from a central mounting hole located equidistant from the end panels.

Abstract: An electronically controlled thread-cutting machine comprising a pulse controlled stepping motor for driving the thread-cutting tool, sensor means for scanning an adjustable thread depth and the torque on the thread-cutting tool, said scanning means comprising a counter for determining the steps of the motor and the number of revolutions of the thread-cutting tool respectively therefrom for determining the depth of the thread, and the current consumption of the motor being used for determining the torque transmitted to the thread-cutting tool, the motor being controlled in accordance with the torque and depth of the thread by micro-processor means for reversing the motor when the torque exceeds an upper limit torque and when the desired and preselected thread depth has been attained.

Abstract: An electronic timepiece comprising means to appreciably increase the number of distinctive information which can be introduced and, if necessary memorized, for a given number of terminals intended for that purpose, information needed for the adjustment of the frequency. The integrated circuit of the timepiece is provided with a first group of m terminals and it comprises an introduction circuit having inputs reserved to introduce the desired information, these inputs being connected to a second group of n terminals of the integrated circuit. The introduction circuit has also control inputs and each of the n terminals of the second group is capable to be connected, by a connection external to the integrated circuit, with one of the m terminals of the first group. The introduction circuit is arranged in such a way as to deliver to its outputs, at least periodically, one distinctive information for each of the m.sup.n possible combinations of the mentioned connections.

Abstract: The device for simplification of adjustment and set-up of a sewing machine comprises a keyboard allowing introduction of information relating to the sewing operation to be performed to the material to be sewn and the like. The information introduced are applied to addresses of memory means, and data relating to the adjustment and set-up of the sewing machine are transmitted to adjusting means and displays illustrating set-up and adjustment. The sewing machine is automatically adjusted and may be set-up by the operator in accordance with the setting-up data indicated on displays provided on the sewing machine. In this way, adjustment and setting-up of the sewing machine is rendered easy and reliable.

Abstract: A minimum drag fluid reaction element including a rotatable shaft adapted to be supported by a vessel carried upon or within a fluid medium; and a rigid fluid reaction fin fixedly attached to the shaft for extension into the fluid medium, the shaft and the fin extending in opposite directions from a common intersection and forming an angle other than a right angle therebetween; the axis of rotation of the shaft lying in a plane generally normal to the fin whereby rotation of the shaft moves the fin through a path describing a right conical section. The angle between the fin and the shaft is preferably obtuse and the plane containing the axis of rotation of the shaft peripherally bisects the fin.

Abstract: A brush having bristles of varying heights in predetermined configurations is disclosed for extirpating ingrown facial hair from false follicles prior to shaving. The brush includes bristles of specified shapes, and incorporates a support for a razor. By properly preparing ingrown hairs for shaving a condition known as pseudofolliculitis barbae is more easily managed, thus alleviating physical and social discomfort.

Abstract: An implant for the jaw includes an implant body, to be fixed without bone cement, a bed made of plastics material and an implant support for receiving the suprastructure. In order to reduce the specific load on the bone the implant body is provided with support ribs, which have the profile of a bone screw. The bed, providing a flexible layer between the implant body and support is frusto-conical towards its lower end and is spread by the implant support, when said support is screwed in.This construction provides for secure anchorage of the implant body into the bone as well as of the bed and the implant support into the implant body.

Abstract: A generally matchbook-shaped package includes a narrowed panel for passing through mating slots in the handles of stacked safety razors. A safety cap is positioned on the bladed portion of the razors and may be easily discarded when ready for use.

Abstract: An electronic watch comprising a device for controlling and driving the day of the month disc, wherein the wheel train supplies the energy necessary for moving the day of the month disc, but does not determine the instant of the jump, which may be initiated at any moment by an electrical signal, independently of the position of the wheel train.The device comprises a mechanism driven by the wheel train and arranged so as to disengage when the moving bodies of the wheel train, controlling the display, turn continuously in clockwise direction and to re-engage when said moving bodies turn in anti-clockwise direction. A control circuit determines, in a portion of the driving cycle in an anti-clockwise direction of rotation with a rapid rate, the jump of the display disc of the day of the month mechanism.

Abstract: A safety valve for exposing a measuring probe to a fluid comprising a hollow inner valve body with a valve seat movably positioned within a hollow outer valve body having a cooperating valve element for providing fluid-tight engagement when the valve is closed. The inner valve body partially extends from the outer valve body when the valve is open for passage of the fluid into an inner chamber for exposing the inserted probe to the fluid. The probe is secured to the inner valve body by a threaded cap, the movement of which is translated to the inner valve body in the presence of the probe for moving the inner valve body to the open valve position. The valve is prevented from being opened in the absence of the probe by a spring mounted on the outer valve body engaging a catch on the cap for restricting movement thereof preventing the valve from being opened.