Abstract: A padlock of the type having a removable locking plug or cylinder capable of being removed from the top through a top opening in the lock case, also has a cap for the top opening. This cap is locked into the padlock case by a loose ball fitting in a groove in the cap and in the case. This cap locking ball is in addition to two other conventional locking balls used to lock the shackle in one conventional type padlock. The shackle is retained by another ball which is carried by a shackle leg and cooperates with another groove in the case. The shackle locking ball is placed in or out of locking position by adjustment of a set screw in the shackle leg.

Abstract: A double contact padlock is provided wherein the locking pin thereof replaces the cam and pins of conventional padlocks and further engages both arms of the padlock shackle to form a high strength padlock. The locking pin bridges the shackle arms and axially rotates into and out of engagement therewith. In a preferred embodiment the locking pin rotates into slots in the shackle arms to secure the shackle. The padlock of the invention can be employed to lock structures, equipment and vehicles including cycles.In another embodiment of the invention a padlock is provided wherein the upper or arch end of the shackles is of greater width and the lower portion of the shackle is narrower in width near the lock housing, to provide a protective shackle arm overhang at the locking spindle end of such lock housing.Additionally, a bracket is provided which tightens around the fixed column of, e.g. a steering wheel of a vehicle.

Abstract: A lock formed of a bar and a shackle whose legs extend into transverse holes formed in the bar. A rotatable bolt extends within and is completely concealed within the bar and overlaps the leg portions located within the bar. Aligned notches in the legs and bolt permit the bolt to be rotated into a position wherein peripheral portions thereof extend within the leg notches for locking the legs within the bar, and to a second position wherein the bolt notches align with the legs for transverse movement of the legs relative to the bar for unlocking. Locking means arranged within the bar permit selective manual rotation of the bolt. The shackle and bar may be formed of a saw resistant material to form a closed, saw resistant loop.

Abstract: A padlock construction including a body having tine-receiving holes and a shackle having tines insertable in the holes, wherein the body is provided internally with tumbler pins shiftable into and out of intersecting relation with a tine to lock the latter, the padlock body having a slot affording end access to the tumblers to shift the latter out of tine-intersecting relation to open the lock.

Abstract: An anti theft locking system including a tubular container charged with an irritant and dye with a locking device to interconnect the ends of the container in a closed loop.

Abstract: A clamp encircles the filler pipe of a fuel tank below the filler cap. Two like diametrically opposed standards extend upwardly above the cap. Loops on the standards accommodate an elongated U-shaped removable shackle of a padlock to be secured between the standards, directly above the cap.

Abstract: A saw and impact resistant member formed of an elongated metal core having a longitudinal exterior surface and a thin wall metal sheath surrounding said core and in contact with said core surface at a finite number of contact lines with longitudinal spaces being formed between the interior wall of said sheath and the exterior surface of the core. The spaces are filled with a matrix formed of hard carbide particles and a soft binder material. The sheath is closely fitted on the core to exclude both binder and hard particles therebetween except in said longitudinal spaces.