Abstract: The invention relates to a lock comprising a lockable knob, formed by a closure tongue (1) non-rotatably mounted on the shaft of a cylinder (2) which rotates in a casing (3) under the action of a knob (4). The knob (4) is mounted on the cylinder (2) and casing (3) such that it can move linearly between two end positions, namely an operating position and a locked position. The casing (3) and the knob (4) include at least two geometrically arranged linear guides (33, 43) which, during the linear movement of the knob (4), are engaged with, or released from one another. In addition, the cylinder (2) and the knob (4) include radial openings (20, 40) which are positioned coaxially in the locked position and offset axially in the operating position. The cylinder (2) and the casing (3) include geometrically arranged cams (22, 32) which limit the rotational movement of the cylinder (2) in the casing (3) between the tongue (1) -opening and -closing positions.

Abstract: A window lock for securing a first window member against unauthorized movement relative to a second window member, the window lock including a bolt mounted for sliding movement in a drum journaled for rotation on a hub throughout an arc of rotation, the hub being affixed to the first window member and the bolt carrying a key and a latch engaged with a cavity in a housing affixed to the second window member throughout the arc of rotation of the drum when the bolt is advanced, the hub having a recess oriented for receiving the key of the bolt only when the bolt is located at a predetermined angular position within the arc of rotation where the key is registered with the recess to permit retraction of the bolt and corresponding retraction of the latch from the cavity, the orientation of the recess being masked from unauthorized view such that visual verification of the predetermined angular position of the bolt is restricted to an authorized operator.

Abstract: A hatch latch with a peripheral top surface adapted to fit through an opening in a hatch has a rotatable axial shaft with a latch member toward its lower end, the shaft being partially enclosed in an outer housing and having a central cavity at its upper end surrounded by a groove in the peripheral top surface which makes the hatch latch waterproof by draining water to the periphery by one or more channels leading to an edge of the peripheral top surface. The cavity is adapted to contain a locking device for locking a hatch that needs to be both latched and locked or a plug to fill the top of the cavity when the hatch requires only latching. A bail, D-ring or the like is used to raise and lower the shaft between secured and latched positions and, to rotate the shaft between latched and unlatched positions.