Abstract: A security device for securing first and second adjacent doors having first and second door knobs, respectively, is disclosed. Each door knob has a neck portion and a head portion. The security device comprises: (a) a rigid plate disposed substantially between two parallel planes; (b) first and second openings spaced apart from one another in a bottom wall of the plate; (c) first and second holes in first and second side walls of the plate, the holes extending through the plate into the openings; (d) first and second locking pins slidably disposed within the first and second holes; and (e) first and second springs attached to the pins which bias the pins to the locking position. The springs can retract into enlarged portions of the holes when the locking pins are in their unlocked positions. The first and second locking pins extend below the respective neck portions of the door knobs when the locking pins are in their locking positions.

Abstract: A security device for securing first and second adjacent doors having first and second door knobs, respectively. Each door knob has a neck portion and a head portion. The security device comprises: (a) a rigid plate disposed substantially between two parallel planes; (b) first and second openings spaced apart from one another in a bottom wall of the plate; (c) first and second holes in first and second side walls of the plate, the holes extending through the plate into the openings; and (d) first and second locking pins slidably disposed within the first and second holes. The first and second locking pins extend below the respective neck portions of the door knobs when the locking pins are in their locking positions. The locking pins have protruding portions extending out of the side walls of the plate for gripping by a user of the security device. A ball can be provided near an inner end of each locking pin.