With Spring Motor Patents (Class 242/371)
- Material responsive (e.g., automatic lock) (Class 242/382.1)
- Alternately engaged locking pawls (Class 242/382.5)
- Shiftable spool body (Class 242/382.6)
- Material speed responsive (e.g., belt sensitive) (Class 242/383)
- Frame movement responsive (e.g., vehicle sensitive) (Class 242/384)
- Manually operated (Class 242/384.7)