Organ capture action

Details Organ capture action Organ capture action

1976-01-26

1977-02-08

Witkowski, Stanley J.

Music

Instruments

Wind

84370, G10B 310, G10H 100

Patent

active

040066584

ABSTRACT:
The present system is a capture action system for electronically recording stop tab configurations in an electric organ, and for recalling the stop tab configurations at will, by depressing of a single control piston for each desired configuration of stop tabs. The system includes provision for setting and recalling combinations of stop tabs associated with a single division of the organ, for example, the swell manual, but not affecting tabs in other divisions, and also includes provision for recording and recalling combinations of all tabs on the organ (general stop) without regard to division. The system further includes a divisional or general cancel function, for operated tab switches, resetting these to inoperative position, and reversible stop functions in which a control piston when actuated reverses the position of its associated stop tab, the reversible stops retaining their abilities to function within the divisional and general combinations. The system is capable of accommodating a maximum of 128 stop tabs, divided into five divisions of the organ, each of which may contain any desired fraction of the total number of stops of the organ, provided that the divisional stops are each allocated to only one division. In operation, tabs which are desired to be operable in combinations are actuated and a set piston and a recall piston are then operated, which stores the locations of the actuated pistons in a memory consisting of 23 channels. One of these channels is required for each general piston and one channel is required for one piston in each division. General and divisional cancel functions require no memory. The reversible stop function uses a temporary memory which is not the same as the memory used for combination stop. The present system is capable of cycling in .27 seconds and within .067 seconds of the start of this cycle all stop tabs have initiated motion.
When the memory is read out tab actuating coils are multiplexed at a 60 Hz. rate, deriving power directly from a 60 Hz. power line transformer. The multiplexing reduces active drive elements and cabling to a fraction of the normal requirement, while achieving rapid actuation of the tabs. The system is normally in a stand-by condition in which the memory continues to recirculate at a very low rate and certain stand-by elements of the system are energized from batteries. Upon operating the latch for either read out or storage, a mode sequence control applies power from a power supply to all the elements of the system, accelerates the clock rate to a normal rate of 400 KHz., and sequences through the 128 tab positions of the system for one cycle, in the process either recording tab information or reading out tab information and setting the tabs, according as a set piston is or is not operated, the piston latch positions not being multiplexed but only the tab positions being multiplexed and continuous repetitive read-in and read-out not being required, but only a single read-out cycle or read-in cycle.

REFERENCES:
patent: 2954716 (1960-10-01), Raymond
patent: 3103847 (1963-09-01), Raymond
patent: 3213179 (1965-10-01), Clauson
patent: 3422718 (1969-01-01), Noehren
patent: 3449995 (1969-06-01), Sepp, Jr.
patent: 3498168 (1970-03-01), Cunningham
patent: 3548064 (1970-12-01), Oncley
patent: 3659448 (1972-05-01), Deutsch
patent: 3686994 (1972-08-01), Badessa
patent: 3699839 (1972-10-01), Denigan et al.
patent: 3700784 (1972-10-01), Molnar
patent: 3733593 (1973-05-01), Molnar

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