Omnigraph No. 2
Omnigraph Manufacturing Company; New York, NY
- Country
- United States of America (USA)
- Manufacturer / Brand
- Omnigraph Manufacturing Company; New York, NY
- Year
- 1920 ?
- Category
- Teaching aids-material
- Radiomuseum.org ID
- 340447
- Wave bands
- - without
- Power type and voltage
- Dry Batteries
- Loudspeaker
- - only for Earphone!
- Material
- Various materials
- from Radiomuseum.org
- Model: Omnigraph No. 2 - Omnigraph Manufacturing
- Shape
- Miscellaneous shapes - described under notes.
- Dimensions (WHD)
- 450 x 155 x 255 mm / 17.7 x 6.1 x 10 inch
- Notes
-
The Omnigraph No. 2 was made by the Omnigraph Manufacturing Company of New York. It was used to teach Morse Code to new telegraph and radio operators.
The original patent for this device were issued to Charles Chinnock on Aug 25, 1903 (US patent 736,936). The company appears to have been founded circa 1900, and to have ceased operation circa 1931.
The Omnigraph model shown here consists of a variable speed spring-powered motor and a stack of aluminum disks which have patterns of dots and dashes "encoded" in their serrated edges. As the motor runs, the disks rotate, a "finger" on a leaf spring follows the pattern on the disks, and operates a set of contacts.
- Net weight (2.2 lb = 1 kg)
- 7 lb (7 lb 0 oz) / 3.178 kg
- Price in first year of sale
- 30.00 USD
- Mentioned in
- Radio News (April-May 1922 advertisement)
- Literature/Schematics (1)
- Patent (US patent No. 736,936 Patented Aug. 25, 1903)
- Literature/Schematics (2)
- Patent (US patent No. 773,374 Patented Oct. 25, 1904)
- Author
- Model page created by Gary Berg. See "Data change" for further contributors.
- Other Models
-
Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Omnigraph Manufacturing Company; New York, NY
Collections
The model Omnigraph No. 2 is part of the collections of the following members.