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2. Ratchet (device) - Wikipedia

   en.wikipedia.org/wiki/Ratchet_(device)

   A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.

3. Come-along - Wikipedia

   en.wikipedia.org/wiki/Come-along

   Come-alongs are not rated for overhead lifting, but a similar-looking device called a ratchet lever hoist is used this way. The original tool of this type was developed by Abraham Maasdam of Deep Creek, Colorado, about 1919, and later commercialized by his son, Felber Maasdam, about 1946. It has been copied by many manufacturers in recent decades.

4. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

5. Chairlift - Wikipedia

   en.wikipedia.org/wiki/Chairlift

   In the case of a rollback, some lifts utilize a ratchet like system to prevent the bull-wheel from spinning backwards while newer installations utilize sensors which activate one or more bull-wheel brakes. All braking systems are fail-safe in that a loss of power or hydraulic pressure will activate the brake.

6. Rigging (material handling) - Wikipedia

   en.wikipedia.org/wiki/Rigging_(material_handling)

   Rigging is the equipment such as wire rope, turnbuckles, clevis, jacks used with cranes and other lifting equipment [1] in material handling and structure relocation. Rigging systems commonly include shackles, master links and slings, and lifting bags in underwater lifting.

7. Linear actuator - Wikipedia

   en.wikipedia.org/wiki/Linear_actuator

   Similarly an electromagnetic ratchet mechanism can be used with a linear screw actuator so that the drive system lifting a load will lock in position when power to the actuator is turned off. To lower the actuator, an electromagnet is used to counteract the spring force and unlock the ratchet.