摘要:
Multiplexed serial data from the keyboard of a musical instrument, such as an electronic organ, is delayed in a shift register to cause generation of musical tones related to the keyswitches closed on the keyboard and combined with the non-delayed serial data for producing mutation voices or chords.
摘要:
A large scale integrated circuit chip is provided with internal tone generators and digital attack and decay features interconnected with external capacitors for controlling the attack and decay of tones. External diodes are wired to the chip and to the external capacitors and have a circuit completed by a damper switch. According to the position of the switch the capacitors will discharge slowly for long sustain of tones, or will discharge very rapidly through an additional discharge path on the chip upon key release to produce very rapid decay.
摘要:
An aquarium filter arrangement including a filter housing and a filter cartridge positionable within a filter chamber of the filter housing. The filter arrangement includes a hinged cover connected to the filter housing. The hinged cover is designed to collect condensation when the cover is in an open position, and empty the collected condensation into the filter chamber when the cover is closed. The filtering housing also includes guides located above the filter chamber. The filter cartridge can be positioned within the guides during maintenance of the aquarium.
摘要:
A filter including a filter housing having a spillway and a pneumatic intake assembly that draws water from an aquarium into the filter housing. The filter housing being configured to internally mount to the aquarium. The filter housing having first and second chamber oriented in a side-by-side arrangement such that water flows in a generally horizontal direction through a filter cartridge positioned between the first and second chambers.
摘要:
An impeller, and impeller and rotor assembly, for use with a permanent magnet motor that provide uni-directional rotation. The impeller and rotor assembly includes an interconnecting arrangement and a locking arrangement that permit continuous rotation in a first direction and prevent continuous rotation in a second opposite direction.
摘要:
A non-volatile memory system for an electronic musical instrument having a plurality of player actuatable instrument controls, comprises a readable, writable memory. The memory includes addressing inputs and data input/outputs. The data input/outputs are coupled with at least selected ones of the plurality of player actuatable instrument controls. Player actuatable memory controls are also provided for selecting either the memory or the selected ones of the player actuatable instrument controls for control of the instrument.