Abstract: A holster for a flash light having a barrel and having a lamp housing wider than that barrel comprises a sheath for part of the flashlight having a first bore adapted to receive the lamp housing, and having a narrower second bore adapted to receive the barrel. Holster and flashlight combinations may use that holster. In one such combination, the flashlight has its barrel extending through the first and second bores of the sheath of the holster, and has its lamp housing projecting from such barrel above the first bore of that sheath. In another combination, the flashlight has its lamp housing in the first bore of the sheath, and has its barrel projecting from the lamp housing above the holster.

Abstract: Switch-less flashlights have a tube for housing the battery and a lamp assembly threaded or mounted on an end portion of that tube and having spaced first and second lamp terminals adapted to contact corresponding battery terminals upon rotation or movement of that lamp assembly relative to the tube in a first sense of rotation or direction. One of such first and second lamp terminals is also adapted to disengage from a corresponding one of the first and second battery terminals upon rotation or movement of the lamp assembly relative to the tube in a second sense of rotation or direction. The flashlight preferably includes a spring, such as in the form of the first lamp terminal contacting the first battery terminal, for permanently pressing the battery against an opposite end portion of the battery housing tube.

Abstract: Methods and apparatus for releasably locking or blocking a door combine a first element with that door for blocking the door in an extended position of that first element and for alternatively releasing the door upon movement of the first element from such extended position. The first element is releasably blocked in its extended position by removably locating a second element in a path of movement of the first element. The door may be locked by locking the first element in its extended position and blocking such locked first element with the second element. The locked first element is released by selectively removing the second element from the path of movement of the first element, and the door is released by moving the released locked first element in its path of movement while the second element is removed from such path of movement. The first element may selectively be unlocked while it is blocked by the second element, and such blocked unlocked first element may be removed for a release of the door.

Abstract: A firearm has a firing device, a manually cockable and selectively releasable hammer for actuating the firing device and a selectively activable laser beam emitting device for providing an aiming mark on a target of the firearm. The laser beam emitting device is activated through cocking of the hammer to provide the aiming mark. The cocked hammer is released with a finger trigger for actuation of the firing device only after activation of the laser beam emitting device and provision of the aiming mark.

Abstract: A laser for assisting the aiming of a firearm is located in a tubular member for emission of a light beam through an end thereof. The tubular member is mounted at the first location with linear freedom of movement, and at a second location with angular freedom of movement, relative to the firearm. The laser may be potted or rigidly mounted in the tubular member. A relative position of an aiming mark in the form of a light spot on a target of the firearm may be varied by angular adjustment of the tubular member at the first mounting location or by selectively deflecting the light beam in or at the tubular member.

Abstract: In a sparger outlet, openings in a sparger loop are provided with specially designed check valves to reduce or eliminate the tendency of the lading to enter the loop through the openings. The openings in the loop include a hollow cylindrical seat portion. The seat member includes an opening in the interior portion thereof which communicates with the loop. The external portion of the seat member includes a circular seat adapted to receive a check valve in closed position. The seat portion may be formed in the loop or be a separate member. The check valve includes a stem portion extending through the seat, a tail portion which engages the interior portion of the seat member, and a head portion which in closed position seats on the seat. Either the stem portion and/or the tail portion is made of elastomeric material. The tail portion includes outwardly extending legs which engage the interior portion of the seat and bias the head portion into seated position on the seat.

Abstract: A method is described for reducing the defect density in a crystalline film grown on a substrate with which it has a substantial misfit. The principle of the method is to grow the film, not directly from the substrate, but from a layer of small islands previously deposited onto the substrate. The technique has been fully investigated for the growth of Ag (and then Au) films on NaCl, a substantial improvement in the quality of the overgrown film being obtained when an intermediate layer of Ni islands is deposited on the NaCl prior to the deposition of the Ag.

Abstract: A method of growing superlattice crystals containing alternating layers of two semiconductor materials in which misfit and threading dislocations are eliminated by growing the layers of superlattice crystal to some thickness less than that which will generate new dislocations, and matching the average lattice parameter of the superlattice with that of substrate so misfit dislocations between the superlattice and the substrate are not formed.

Abstract: Apparatus for securing vibration sensitive equipment relative to a support comprising a rigid structure having an outer surface for attachment of the vibration sensitive equipment, a hollow interior and a wall portion between the outer surface and the hollow interior. This structure is rigidly attachable to the support. The hollow interior contains at least two dynamic damping systems having different resonance characteristics. Each dynamic damping system comprises a damping mass elastically mounted in spaced relationship to the wall portion.