A duplex servomotor suitable for use in machine tools requiring automatic position control, feed control and the like, and other applications, which comprises a constant speed AC motor adapted to be coupled with a load to drive said load and a low-inertia DC servomotor adapted to be coupled with said load through speed reduction means and clutch means. The AC motor and DC motor are combined and arranged as a compact unit in a machine frame so that high-speed operation and low-speed operation can...

A duplex interphone wherein a master station and substation each having a microphone and a receiver are interconnected through two exclusive communication lines. The audio signal produced by the microphone in the master station is transmitted through said two communication lines in the form of a modulated carrier signal or audio signal. The audio signal produced by the microphone in the sub-station, on the other hand, is transmitted through said two communication lines in the form of a modulated...

A hot and cold water supply valve for a washing machine adapted by operation of a single control lever to (a) prevent flow of both hot and cold water to the machine, (b) pass only cold water, or (c) pass both hot and cold water.

A valve mechanism to effect rapid changes of fluid pressure in a controlled fluid pressure system including, for example, airplane deicer boots. The pressures may change from a high vacuum to a few atmospheres, or from any desired low pressure to and from a relatively high pressure. The mechanism includes an inner housing comprising part of the controlled pressure system with opposite ports communicating respectively with high and low pressures, and interconnected closures opening one port while...

An improved duplex visor for a helmet, the visor having a transparent clear portion and a transparent light attenuating portion. The visor is adapted to be pivotally moved from a position in the field of vision of the wearer to a position in spaced conformity to the crown of the helmet and further adapted to be easily rotated, whereby either the clear or the attenuating portions can be positioned in the field of vision in order to accommodate a full range of light conditions.

Two page cover member each having one cover member secured in face contact. A pocket for receiving a disc record is provided between the attached cover members.

A duplex pallet for the transport or storage of articles of the present invention has a deck surface easily switchable between a configuration matching with, e.g., the ISO (International Standards Organization) standards and a configuration matching with, e.g., JIS (Japanese Industrial Standards). While the deck surface is held in the configuration matching with the ISO standards, a hook and a contact guide are respectively released from a clamp post and a pallet body so as to release one longer...

A duplex scanner comprising a first scanning module, a second scanning module, a transmission mechanism, a power source and a control processing unit is provided. The first scanning module scans a front side of a to-be-scanned document and captures a front side image of the to-be-scanned document. The second scanning module scans a back side of the to-be-scanned document and captures a back side image of the to-be-scanned document. The transmission mechanism moves the to-be-scanned document rela...

The printer comprises a first receptacle (11) for the sheets to be printed, a sheet feeding path (27) with a printing zone (14) and a second receptacle (15) for the printed sheets. The latter is integral with an intermediate storing device having storage trays (42, 43) thus forming a group (44) which can be pivoted about a shaft (45). The sheets printed on a first face are fed by conveying members (57) into the storage trays, retained for drying, fed again into the feeding path (27) where they a...

A thermostat is provided for controlling a heating apparatus having two individually actuatable heating elements in order to more accurately control the heat output of the apparatus. The thermostat is designed such that at environment of temperatures below a set temperature t.sub.1, less than the desired temperature t, both heating elements are actuated. As the environmental temperature increases beyond the set temperature t.sub.1, the thermostat deactuates the main heating element and the secon...