A battery-carrying means for an electric or electronic timepiece wherein the elastic contact means projecting from the cover providing access to a battery-receiving means in said timepiece are positioned on the cover so as to be out of contact with the projected portion of the battery should said battery be inserted with said projected portion facing said cover. An insulating member or a space is provided between said cover and said projected portion to prevent contact therebetween should said b...

A circuit arrangement, to which the vehicle electric system supply voltage is applied and which for briefly maintaining at least one internal normal d.c. voltage in the event of failure of the vehicle electric system supply voltage, includes a reserve energy accumulator, to which a charging voltage higher than the at least one internal normal d.c. voltage is applied in regular operation, and which, in the event of failure of the vehicle electric system supply voltage, delivers a reserve voltage ...

An electronic clock in which the time is indicated by a combination of hour indications and decimal minute indications. A basic time input is successively divided by factors to provide signals that control lights, the lights including a first series of lights to indicate the hour, a second series of lights to indicate the tens digit of the minute, and a third series of lights to indicate the units digit of the minute.

A foldable chair includes a chair frame and a seat frame. The chair frame includes two spaced apart front legs, two spaced apart rear legs pivotally connected to the two front legs respectively, and a supporting member transversely extended between the two rear legs and having a bottom inclined engaging side. The chair frame is adapted to pivotally fold between an unfolded position and a folded position. The seat frame includes two seat arms pivotally connected to the front legs respectively, a ...

A digital watch system includes a crystal controlled oscillator with frequency division which controls a set of counters, each counter carrying coded horological data. Selected counter set data is multiplexed into a seven segment decoder. The decoder output is demultiplexed into memories, one for each of the segments in each of the display digits. The memories control segment drivers for the liquid crystal digital displays.

An electronic timepiece which comprises a time standard that delivers a periodic signal of predetermined frequency, an electronic divider, an electromechanical converter controlled by the divider, time display means actuated by the converter, a two-phase voltage generator controlled by the time standard and a two-phase network supplied by the generator, the various stages of the divider being associated with one or the other of the network phases.

A digital clock circuit particularly suited for monolithic integration wherein the counting rate of the clock is variable from a normal to a faster rate in response to the level of a 60 Hz voltage derived from the power line and applied to a single input terminal as a clock reference signal.

A circuit for a clock having a time indicating mechanism is connected to regulate the driving of a DC motor by a predetermined amount at predetermined time intervals, so as to actuate the time indicating mechanism without being affected by the variation in the amplitude of the DC energizing voltage available for driving the motor and the variation in the load on the motor. The motor driving circuit has a timing pulse generating circuit for generating timing pulses at the predetermined time inter...

The disclosed MOS transistor includes a channel region formed of a lightly doped semiconductor layer disposed in a surface portion of a heavily doped semiconductor layer subsequently disposed on a lightly doped semiconductor substrate. The channel region may be of the identical or opposite conductivity type to the heavily doped semiconductor layer that has the same type conductivity as the substrate. Also the channel region may be of an intrinsic semiconductive material. A source and a drain reg...

In an exhaust secondary air supply system including an electric air pump and a flow rate control valve disposed in an air supply passage connected to an exhaust passage of an engine, the electric air pump is first driven after the start of the engine, and the flow rate control valve is then opened after a lapse of a predetermined time. At a time after starting the driving of the electric air pump, the abnormality of the electric air pump is detected by comparing a deviation between the current b...