Abstract: A device for protecting the connection of a tubular conduit to a main tube of a maple sap collecting system wherein sap collected from maple trees are directed under vacuum to a pumping station of a sap processing center. The device comprises a band having a first end adapted to be mounted to the main tube and an opposite end adapted to be mounted externally onto the tubular conduit at a given distance from the main tube. This distance is greater than the distance between the first and opposite ends of the band so that accidental impact on the tubular conduit resulting from falling objects and tension applied to the attachment of the conduit to the main tube are taken by the band to thereby protect the connection of the tubular conduit to the adapter.

Abstract: A focusing system for optical devices in which quick, precise focusing is enabled through the use of a spindle-cord member combination system designed to prevent backlash. The system includes a spindle engageable by an operator which is rotatable around a spindle axle, and a lens mount. The spindle axle can be attached to a support member. A cord member can adjustably engage the spindle, and be attached at each end of the lens mount. The lens mount can slide along the support member. In addition, an eye piece assembly can be attached to the sled and moveable with the lens mount, as the lens mount is adjusted by rotation of the spindle.