Audible turn signal canister unit
US5218340A · kind A · utility
Inventors
Key dates
| Filing date | Aug 23, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Aug 23, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/22
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An audible turn signal canister unit for automobiles incorporates an audible alarm in the form of a unitary, self-contained module which can be plugged into the existing socket in the automobile in place of a standard flasher unit. The alarm is a pure tone in the mid-speech frequency range (e.g. 1000 to 2500 Hz) in order to be more readily heard over background noise or by hearing impaired individuals. Optionally, the unit can be provided with a time delay circuit in the form of an electronic counter that is reset each time that the turn signal switch is turned on or closed in order to establish the beginning count for the activation of the alarm a predetermined time interval after the turn signal unit is activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.