History of the manufacturer
United Air Cleaner Corp. - see also Sentinel
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| Name: | United Air Cleaner Corp. - see also Sentinel (USA) |
| Brand: |
 |
| Abbreviation: | united03 |
| Products: | Model types |
| Summary: |
United Air Cleaner Corp.; - Trade name Sentinel |
| Production: | - 1933 |
| History: |
United Air Cleaner Corporation produced in the 20's under the name Sentinel. A merger with Electric reseach labs. ended in receivership ca.1930.
Erla reorganised as a private company in 1931 and bought out the remaining company. Although the corporate name remained ERLA, it operated as Sentinel Radio Corp. from 1934. On Friday, October 23, 1931, a U.S. federal trademark registration was filed for SENTINEL by UNITED AIR CLEANER CORPORATION, CHICAGO. The USPTO has given the SENTINEL trademark serial number of 71320383. The current federal status of this trademark filing is EXPIRED. The correspondent listed for SENTINEL is ? of *****, *****, ***** ***** . The SENTINEL trademark is filed in the category of Houseware and Glass Products . The description provided to the USPTO for SENTINEL is RADIO RECEIVING SETS AND PARTS THEREOF, RADIO TUBES AND LOUD SPEAKERS.
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Some models:
| Country | Year | Name | 1st Tube | Notes |
|---|---|---|---|---|
| USA | 31/32 | 110 [Table] | 35 | [3331454] |
| USA | 31 | 114 | 35 | 4 legged highboy with stretcher base. |
| USA | 32 | 118 | 27 | 4 legged highboy with stretcher base. |
| USA | 30 | 8 | 224 | 4 legged highboy with stretcher base. The same chassis for Radio-Phono 9. |
| USA | 30 | 9 | 224 | Radio-Phono using same chassis as model 8 Highboy |
| USA | 30 | 10 | One dial (primary tuning control knob) | |
| USA | 31 | 106 Portrola | 24 | Smoking stand ! |
| USA | 31 | 108 [Console] | 24 | 4 legged highboy with stretcher base. |
| USA | 31 | 108A [Console] | 35 | |
| USA | 31 | 108A Super Midget | 35 | Unfortunately we can not yet show a picture from a collector, including details like chass... |
| USA | 31 | 109 Louis XVI (16) | 35 | AF output tubes are in parallel |
| USA | 30 | 11 Ch=104 | 24A | One dial (primary tuning control knob) . Rectifier 80 in separate pack. |
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