A series of Whippletrees are used in a standard compression wiper to evenly distribute the point force of the wiper arm suspended along the wiper blade. Some large telescope designs use Whippletrees to support optical elements. The shaft provides distributed mechanical support, reducing local mechanical deflections, which reduces optical distortion.  Unlike the applications described above, which are two-dimensional, whipped shafts in telescopic mirror support cells are three-dimensional designs, since the shaft must bear multiple points on an area. A whippletree balances the pull on either side of the animal, preventing the load from pulling alternately on each side. It also prevents a point load from pulling the caterpillars to the sides of the animal. Link-type mechanical analog computers use Whippletree links to add and subtract quantities represented by rectilinear motion.  The illustration here by Whippletrees for a three-level team is very similar to a group of link adders and subtractors: “Last” is the equivalent of the initial sum/difference of the individual entries. Inside the computer, the button shaft cylinders are wrapped in thin metal strips to convert rotational motion into linear motion. If several animals are used side by side, more whippletrees can be used behind the first. Thus, each with two animals has its own whip shaft, and another balances the loads of its two whip shafts – an arrangement sometimes called double shaft or leader bars for leaders of a large team. With three or more animals, even more Whippletrees are needed; Some can be made asymmetrical to compensate for an odd number of animals.
Several Whippletrees balance the traits of different animals and ensure that everyone takes an equal share of the work. After about three-quarters of an hour, I was suddenly alerted when I heard the squeak of a whip outside on the lawn. Twelve “Swingle trees” (Whippletree, Whiffletree, Singletree) are listed in the inventory. Subscribe to America`s largest dictionary and get thousands of other definitions and an advanced search – ad-free! Whippletrees are used under tension to distribute the forces of a point load to the tracks of draught animals (caterpillars are the chains or straps on either side of the harness on which the animal pulls). In these, the whippletree consists of a loose horizontal stem between the draught animal and its load. The center of the rod is connected to the load, and the rails are attached to its ends. Whipping trees are mainly used to pull a towed load such as a plow, harrow, tree trunk or canal boat, or to pull a vehicle (ladders in a team of more than one number of animals). A whippletree or whiffletree is a mechanism for distributing force evenly across connections. It is also known as equalizer, guide bar or double shaft. It consists of a rod rotated inwards or near the center, with the force exerted from one direction at the pivot point and the other direction at the tips. Several whippletrees can be used in series to further distribute the force, for example to simulate pressure on a surface, for example when applying loads to test aircraft wings. Whippletrees can be used in compression or tension.
They have also been used for subtraction and addition calculations in mechanical computers. Tension Whippletrees are used in cleverly suspended mobiles, such as those of the artist Alexander Calder. The Whippletree, which hung from the end above the well-trodden circuit, appeared to be cracked by heat and age. A swingletree or singletree is a special type of whippletree used for a horse-drawn cart. The term swingletree is sometimes used for Zugwhippletrees. The Colter had to be sharpened and there was a crack in the Whippletree. the swivel or swivel rod to which the tracks or tractors of a harness are attached and to which a sled, plow or other equipment or vehicle is towed; a whistling tree; a swing tree; a single tree. See Singletree. A widespread application was in the IBM Selectric typewriter (and the resulting IBM 2741), where connections added binary mechanical inputs to spin and tilt the writing ball.
This type of computer method was also used for naval guns, such as the MK 56 gun fire control system and sonar fire control systems. a wooden crossbar for a plow or cart, pivotable in the middle, from which rails are attached to a “Whiffletree” draught animal. Merriam-Webster.com Dictionary, Merriam-Webster, www.merriam-webster.com/dictionary/whiffletree. Retrieved 12 December 2022. A crossbar attached to the tracks of a draft horse and to the vehicle or equipment pulling the horse Whippletrees are also used in modern agriculture – for example, to connect several agricultural tools such as harrows, mowers or rollers to a tractor. This combines several small loads into a single load on the tractor coupling (unlike the use for draught animals).