This invention is concerned with a locking device for a drum which seals and locks the bung hole and vent hole of 35 or 55 gallon drums to prevent unauthorized access thereto. The device includes two swivel locks, each consisting of a lock cap containing an externally threaded base and a swivel and a lock bar. After the swivel locks are threaded into the bung hole and vent hole, the swivels are rotated until their holes align. A lock bar having a flanged end of greater width than the hole of the swivel and a hole at its other end is passed through the holes. The shackle of a padlock or other locking device is then passed through the lock bar hole and locked. Means for rotatably retaining the swivel in the lock cap are also provided.

A lock and hold-down device to surround the top and sides of a battery in a motor vehicle to prevent the unauthorized removal of said battery. The lock and hold-down device includes a pair of identical brackets which are located at opposite sides of the battery and a crossbar which extends across the top of the battery between the side brackets. First ends of the side brackets are secured to a battery plate underneath the battery, and opposite ends of the side brackets have slots formed therein through which to receive the crossbar. One end of the crossbar is bent, and the opposite end of the crossbar is interconnected with a padlock so that the crossbar cannot be removed from the side brackets. A pair of manually adjustable fasteners are moved through holes in the crossbar and into engagement with respective top plates which underlie the crossbar. Accordingly, a downward force is applied to the battery to minimize displacement thereof as the vehicle is driven over a rough or bumpy terrain.

A field security package for a dosimeter includes two interlocking rigid elements made of a reflective polyvinyl chloride material in which a dosimeter is positioned. The elements collectively providing a spiral wound grid surface to provide adequate ventilation, simultaneously a cover to prevent ingress of moisture, a reflective surface for heat and a radiation pervious material. The two elements of the security package can be interlocked together with the link of a chain for secure mounting from support means.

A battery box hold-down comprising three metal strips. One metal strip is attached by one end to a base and has a slip-joint hinge component at the second end. Another metal strip is attached by one end to a base and has a hasp component at the second end. The top metal strip, shaped to fit over the top of the battery box, has a slip-joint hinge component at one end and a hasp component at another end. When the top metal strip engages over the battery box, the attached metal strips by slip-joint and hasp and a lock is fixed through the hasp, the battery box is fixed in a secure position. The battery may be serviced by unlocking the lock and disengaging and removing the top metal strip and the battery box top.