CHORD TEACHING DEVICE

• US 3,677,130 A
• Filed: 06/09/1971
• Issued: 07/18/1972
• Est. Priority Date: 06/09/1971
• Status: Expired due to Term

• Current Assignee: Michael G. Petreycik
• Original Assignee: Michael G. Petreycik
• Inventors: Petreycik, Michael G.
• Primary Examiner(s): Wilkinson, Richard B.
• Assistant Examiner(s): Gonzales, John F.
• Application Number:
  US05/151,178
• Time in Patent Office: 405 Days
• Field of Search: 84/470-474,477,478,480,482,485
• US Class Current: 84/471.00R
• CPC Class Codes: G09B 15/005 of the slide type

Abstract

A device for the automatic selection and display of chromatic seals notes and relative keyboard keys corresponding to any preselected major scale or type of chord and any preselected name of major scale or chord whereby the name and type of scale or chord, as well as roots and inversions thereof, can be dialed to identify the corresponding notes and keyboard keys, or, conversely, the desired range of notes and keyboard keys can be dialed to identify the name of the major scale and the name and type of chord, as well as roots and inversions, corresponding to those chromatic notes and keyboard keys.

Claims

1. A visual aid device for keyboard musical instruments comprising a face panel and an indicator panel associated with said face panel and adapted for horizontal and vertical movements relative to said face panel, said face panel being provided with a chord and scale name dial and window, a chord and scale type dial and window perpendicular to said name dial and window and a multi-octave horizontal chromatic scale dial and window having a simulated keyboard in registration therewith, said indicator panel being provided with a system of parallel vertical and horizontal columns of dots which are coded according to the numerical progression of the chromatic scale, each horizontal column of dots being adapted to be visible through the scale window of the face panel as a single horizontal column of dots representing a multi-octave numerical progression of notes when the indicator panel is moved vertically relative to the face panel, said indicator panel also being provided with a horizontal line indicator and a vertical line indicator which are positioned relative to said coded dots, relative to each other, and relative to the name dial and window and type dial and window of the face panel such that when one line indicator is moved to a desired position on the name dial, as viewed through the window panel thereof, and the other line indicator is moved to the desired position on the type dial, as viewed through the window thereof, the horizontal column of dots which becomes visible through said scale window will correspond to the correct numerical progression of notes for the dialed name and type of scale or chord.

2. A visual aid device according to claim 1 in which an octave range selector is provided in association with the said scale window and is adapted for horizontal movement across the width thereof, the selector having a width corresponding to a single octave on said multi-octave chromatic scale dial and functioning to visually segregate the dots showing through said scale window into octave groups.

3. A visual aid device according to claim 2 in which the octave range selector comprises a transparent element which magnifies the dots to cause their visual segregation.

4. A visual aid device according to claim 1 in which the scale and chord name dial and window are horizontal and the window is aligned with the said chromatic scale window.

5. A visual aid device according to claim 1 comprising a vertical slide panel associated with said indicator panel and adapted for horizontal movement therewith, relative to the face panel, said slide panel having guide means for supporting the indicator panel for vertical movement relative to said slide panel and to said face panel and for supporting the indicator panel for horizontal movement relative to said face panel.

6. A visual aid device according to claim 5 in which said guide means includes detent means for coordinating the vertical positioning of the indicator panel with the location of the chromatic scale window on the face panel.

7. A visual aid device according to claim 5 in which a backing panel is associated with said face panel to provide a case within which the indicator panel and slide panel are mounted for relative movement, the case limiting the slide panel to horizontal movement and the backing panel having detent means for coordinating the horizontal positioning of the slide panel and of the indicator panel supported thereon with the location of the chromatic scale window on the face panel.

8. A visual aid device according to claim 7 in which the slide panel and backing panel are provided with openings and the indicator panel is provided with means, accessible through said openings, by which the indicator panel can be moved vertically and horizontally within the case.