Swivel locking mechanism for aircraft seat

An aircraft seat comprising:

• a base frame;
• a base plate attached to an upper side of the base frame;
• a seat frame mechanically coupled to the base plate, wherein the seat frame is configured to rotate relative to the base plate about a vertical axis;
• a swivel plate fixedly attached to an underside of the seat frame configured to rotate relative to the base plate;
• and
• a swivel locking system, comprising:
• an internal gear plate fixedly attached to the base plate, wherein the internal gear plate comprises a plurality of first teeth along an inner sidewall of the internal gear plate;
• a guide plate fixedly attached to the swivel plate, wherein the guide plate comprises a first guide wall and a second guide wall;
• a rail attached to the guide plate, wherein the rail is between the first guide wall and the second guide wall;
• a cart attached to the rail and movable along the rail, wherein a first end of the cart comprises a serrated pawl fixedly attached to the cart, wherein the serrated pawl comprises a plurality of second teeth, wherein the plurality of second teeth faces the plurality of first teeth;
• and
• a variable-radius cam attached to the guide plate and contacting a second end of the cart, wherein the variable-radius cam is configured to, when the variable-radius cam is rotated, push the second end of the cart such that the serrated pawl plurality of first teeth contacts the plurality of second teeth internal gear plate.

An aircraft seat comprising:

• a base frame;
• an internal gear plate lower member affixed to the base frame, wherein the internal gear plate comprises a recess, wherein the perimeter of the recess comprises a plurality of gear teeth;
• a seat frame over the internal gear plate, wherein the seat frame is configured to rotate about a vertical axis;
• an upper member guide plate on the internal gear plate lower member, wherein the guide plate is affixed to the seat frame, wherein a bottom surface of the upper member guide plate comprises a first wall and a second wall that protrude from the bottom surface into the recess, wherein an inner surface of the first wall faces an inner surface of the second wall;
• and
• a cart attached to the bottom surface of the upper member guide plate, wherein a first sidewall of the cart faces the inner surface of the first wall, wherein a second sidewall of the cart faces the inner surface of the second wall, wherein the cart is between the inner surfaces of the first wall and the second wall, wherein a third first sidewall of the cart comprises a plurality of pawl teeth that fixedly protrude from the third first sidewall, wherein the cart protrudes into the recess, wherein the cart is configured to translate in a direction parallel to the inner surfaces of the first wall and the inner surface of the second wall;
• and
• a seat frame on the upper member.