GB369838A - Musical instruments, in which music is produced by frequency alterations of electricoscillations - Google Patents
Musical instruments, in which music is produced by frequency alterations of electricoscillationsInfo
- Publication number
- GB369838A GB369838A GB20079/31A GB2007931A GB369838A GB 369838 A GB369838 A GB 369838A GB 20079/31 A GB20079/31 A GB 20079/31A GB 2007931 A GB2007931 A GB 2007931A GB 369838 A GB369838 A GB 369838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- band
- resistance
- contact
- block
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D3/00—Pig or like casting
- B22D3/02—Moulding of beds
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
- G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
- G10H1/055—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements
- G10H1/0558—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements using variable resistors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
369,838. Electrical musical instruments ; electric resistances. LERTES, P., 55, Kuhwaldstrasse, and HELBERGER, B., 37, Zeppelin-Allee, both in Frankfort-on- Main, Germany. July 13, 1931, No. 20079. Convention date, July 16, 1930. [Class 88 (ii).] In a musical instrument operated by electric oscillations generated by a valve 13, the frequency is varied by means of a potentiometer controlling the grid potential of the oscillating valve. The contact element of the potentiometer comprises a metal band fixed to a block 3a and supported at the other end on a trestle 3b, this end being maintained in tension by a spring 5 acting through a block 4 pivoted at 6. The contact band is covered by a slightly wider band 1b of leather or other supple insulating material and is adapted to be depressed by the operator's finger-tip at any desired point on to a resistance element 2a of convex section on its upper face. The block 4 carries an arm 7 engaging a mercury cup 8 whereby depression of the band 1b makes the circuit of the grid battery 16 through the resistance 2a before contact of the band with the resistance is established. The resistance element 2a is supported by a cloth band 2b secured at its free end to a spring-controlled lever 9 on which is mounted the movable primary coil 12 of a transformer coupling the oscillating circuit to an amplifying valve. The resistance 2a is preferably wound as a spiral of varying pitch so that a given shift in the contact point corresponds to the same musical interval throughout the length. In an instrument comprising several voices, the potentiometers are arranged at different levels on sloping supports to facilitate playing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE369838X | 1905-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB369838A true GB369838A (en) | 1932-03-31 |
Family
ID=6318339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20079/31A Expired GB369838A (en) | 1930-07-16 | 1931-07-13 | Musical instruments, in which music is produced by frequency alterations of electricoscillations |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR369838A (en) |
GB (1) | GB369838A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3240850A (en) * | 1963-03-08 | 1966-03-15 | Selas Corp Of America | Manufacture of structural slabs |
-
1906
- 1906-09-19 FR FR369838D patent/FR369838A/en not_active Expired
-
1931
- 1931-07-13 GB GB20079/31A patent/GB369838A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR369838A (en) | 1907-01-22 |
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