Alan B Welsh

US Patent:

41421396, Feb 27, 1979

Filed:

Jun 27, 1977

Appl. No.:

5/809989

Inventors:

Mathew A. Slaats - Jasper IN
Alan B. Welsh - Jasper IN
Wade R. Bray - Jasper IN

Assignee:

Kimball International, Inc. - Jasper IN

International Classification:

G05B 1928

US Classification:

318603

Abstract:

A search mount for a telescope and a method of operation in which a telescope mount is provided which is indexable about a vertical axis and also about a horizontal axis so as to lay the telescope in any desired direction. The mount is provided with motors, and the movement of the motors is under the control of digital circuitry, and manual switches. The drives between the motors in the telescope mount embody backlash free reduction gearing of novel design and construction. In particular, the motors operate without requiring any feedback to effect control thereof.

US Patent:

41433270, Mar 6, 1979

Filed:

Jul 8, 1977

Appl. No.:

5/813824

Inventors:

Alan B. Welsh - Jasper IN

Assignee:

Kimball International, Inc. - Jasper IN

International Classification:

H03K 116

US Classification:

328 61

Abstract:

A method and apparatus for generating tone signals and the like in which a given frequency is employed for controlling a counter arrangement at a frequency which is equal to the frequency of the given signal multiplied by a factor other than a whole number. The multiplied frequency output when divided down will yield a frequency differing a desired amount from the given frequency.

US Patent:

42033390, May 20, 1980

Filed:

Apr 6, 1978

Appl. No.:

5/893872

Inventors:

Alan B. Welsh - Jasper IN
John W. Robinson - Jasper IN

Assignee:

Kimball International, Inc. - Jasper IN

International Classification:

G10H 102
G10H 510

US Classification:

84 119

Abstract:

A keying arrangement for electronic organs in which a tone signal consisting of a square wave having, for example, a fifty percent duty cycle is connected to the input of the keyer circuit, and the output thereof, upon the depression of a playing key, consists of a pulse train with the amplitude rising at a controlled rate and the pulse width or duty cycle decreasing at a controlled rate but lagging the increase in amplitude so as to closely duplicate the playing of a muted brass instrument in the attack fashion. A muted brass tremulant affect is achieved by applying a cyclically time variant signal to modulate the pulse amplitude and pulse duty cycle, again with the change in duty cycle lagging the change in amplitude. The circuitry for accomplishing this comprises a diode keyer wherein a pair of resistor-capacitor circuits having different time constants control the keyer to effect variations in pulse amplitude and duty cycle over respective intervals of time.

US Patent:

40732096, Feb 14, 1978

Filed:

Apr 9, 1976

Appl. No.:

5/675323

Inventors:

Billy J. Whittington - Jasper IN
Alan B. Welsh - Jasper IN
Timothy L. Burns - French Lick IN

Assignee:

Kimball International, Inc. - Jasper IN

International Classification:

G01H 102

US Classification:

84 124

Abstract:

A method and circuitry for frequency generation, especially for electronic organs, in which a digital signal is developed by the actuation of an element such as a key of an organ keyboard. The digital signal is converted to a respective voltage signal and the voltage signal is employed to control a voltage controlled oscillator which supplies a signal corresponding in frequency to the actuation of the aforesaid element. An organ provided with a system for frequency generation according to the present invention can be operated monophonically or polyphonically and is capable of producing desirable effects, including celeste and portamento effects.

US Patent:

41290550, Dec 12, 1978

Filed:

May 18, 1977

Appl. No.:

5/797931

Inventors:

Billy J. Whittington - Jasper IN
Timothy L. Burns - French Lick IN
Alan B. Welsh - Jasper IN

Assignee:

Kimball International, Inc. - Jasper IN

International Classification:

G10H 100

US Classification:

84 101

Abstract:

Circuitry in an electronic organ for electronically storing a series of signals corresponding to depressed keys depression and for recalling the stored series in response to player commands. The circuit allows the player to play accompaniment chords of a piece of music alone and at any desired pace, and then while manually rendering the righthand, or solo, portion of the music. The chords are played by simply depressing a single control button whenever the next chord in the stored series is required. A further feature of the invention is the ability to store sets of switch or tab or other selector element settings for later recall. The selector element setting storage circuit enables the player to switch tab settings during storage of chords, while storing the patterns in the order in which they will be desired. A combination of the two features referred to allow a player to prestore both chord and tab information pertaining to a piece of music and recall both chord and tab information at will by pressing a single button. Information of any sort that can be selected can be stored by the arrangement according to the present invention including information pertaining to rhythms, presets, tremelo, vibrato, volume, or expression control as well as other selectable or variable elements under the control of the organ player.