Alarm system for bicycles and the like
US4379281A · kind A · utility
Inventor
Key dates
| Filing date | Sep 18, 1981 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Sep 18, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20822
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An alarm system for bicycles and the like in which a collar having an undulating exterior surface is mounted on the handlebar post and rotates therewith. A moveable trigger member, preferably a spring biased pin, is mounted to the bicycle chassis adjacent the collar. Unauthorized rotation of the handlebars causes the collar to rotate against the trigger member, moving that member to close a set of contacts and thereby complete an electrical alarm circuit. The alarm circuit is controlled by a latching relay which hold the alarm on until either an automatic timing device operates to terminate the alarm, or the system is turned off by a key-operated lock. The trigger member closes another set of contacts to actuate the alarm if the bicycle is tampered with by removing the collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.