Double acting actuators provide bi-directional actuation for secondary mechanisms, powered by electric motors or compressed oil and gas. They are ideal for high torque loads in both directions, while single acting actuators deliver power over half of their actuation output range. A double acting actuator is a mechanical device designed to provide powered bi-directional actuation […]
A wrench is a tool used to turn nuts and bolts. A double-ended wrench has gripping mechanisms on both ends. It comes in different sizes and styles, including an adjustable model and an enclosed model. It’s important to choose the correct size for the project. A wrench is a tool used to apply torque to […]
A double square is a measuring tool used in woodworking and precision machining to maintain measured patterns. It consists of a rule and a blade, with the blade being the moving part that can be adjusted for proper measurement. The tool can be made from different materials and may have accessories like spirit levels or […]
A double flue is two flues routed together out of a structure, used to minimize the number of holes in a roof. It allows for multiple fireplaces or different types of fuel combustion devices to be connected to the same chimney, but special code restrictions apply for safety reasons. A double flue is a set […]
A double hull ship design has two hulls with a gap between them, providing protection in the event of leaks and minor accidents. It is standard for passenger ships and oil tankers to reduce environmental and financial risks. The design can be retrofitted or built from scratch, but it makes ships less stable and subject […]
Double-brewed coffee can be made by either rebrewing already brewed coffee through a percolator onto fresh grounds or using twice the normal amount of grounds. Double-strength coffee is made with twice as many coffee grounds as usual and is ideal for iced coffee drinks. Cooking coffee grounds on the stove for an extended period of […]
A dual-axle trailer has two axles with four or more wheels for stability and strength, allowing for safe towing of heavy or numerous items. There are two basic types: enclosed and open-air. The trailer connects to the tow vehicle via a hitch and receiver system, and larger trailers require full-size trucks or SUVs for towing. […]
A double pulley is a system of two pulleys used to move a load, providing a mechanical advantage that makes it easier to move heavy loads. It can refer to two separate pulleys joined by ropes or a single unit of two side by side pulleys. Double pulley systems are commonly used in manual heavy […]
A double pulley is a system of two pulleys used together to move a load, providing a mechanical advantage that makes it easier to move a load. It can refer to two separate pulleys joined by ropes or a single unit of two side by side pulleys. Double pulley systems are commonly found in environments […]
A two post hoist is a lifting device with two sets of lift arms connected to two tower structures. They are commonly used in the automotive industry and come in hydraulic, electric, or electro-hydraulic configurations. They can be symmetrical or asymmetrical, and often have equalizer cables to ensure even lifting. A two post hoist is […]
Double agents are Secret Service agents who pretend to spy on a targeted group for another agency but are loyal to the target group. They are used to infiltrate rivals or enemies and spread disinformation. However, they are a risk as they can deceive their employers and sell classified information. Famous double agents include Roman […]
A dual auction is a sales process where buyers and sellers submit bids and request prices simultaneously, with an auctioneer determining an offset price for the sale. It is also studied by social scientists and economists to understand market behavior. A computer can act as an auctioneer, and open protest auctions can result in prices […]
Double ka meetha is a traditional Indian dessert made with fried bread soaked in saffron and cardamom syrup, topped with cream or fruit sauce and nuts. It is a common dish in India and served at banquets or as an afternoon snack. It is often served with other traditional Hyderabad sweets. Double ka meetha is […]
The Seinfeld episode about double dipping sparked concern among consumers about the safety of sharing dips. Experts advise against double dipping and suggest spreading dip on the entire chip or using a new chip to avoid contamination. Guests should be aware of public aversion to double dipping and avoid the practice. In a classic episode […]
Medicine balls are weighted fitness balls used in strength training and physical therapy. They come in various sizes and some have handles for a close grip, allowing for a wider range of exercises. They can be thrown to work multiple muscles and are useful for resistance training in floor exercises. Dual-grip medicine balls increase exercise […]
A double check valve prevents back siphoning and contamination of fresh water supplies. It consists of two non-return check valves mounted in one housing for redundancy and efficient seating. Backflow contamination is a major source of freshwater contamination, and check valves rely on a spring- or gravity-loaded plunger or diaphragm to allow fluids to flow […]
Double flooring is a construction method using binding joists to add flooring and ceiling joists on opposite sides. It provides stability, noise reduction, but adds weight and height, increasing construction costs. Careful placement of tie-in joists is necessary to distribute weight evenly. Double flooring is a type of construction where the floor is created using […]
A double wall oven has two separate oven areas with their own controls, offering more cooking space and flexibility. They come in gas and electric models, with electric being more popular and offering more options. They are typically installed at waist level or higher, and come in three sizes. Higher-end models offer touch controls, timers, […]
Double chocolate cheesecake is a chocolate-flavored cheesecake with a second application of chocolate, such as chocolate chips, swirls, or a chocolate crust. The second chocolate can be in the form of marbled ribbons, flavoring, or toppings. It can also refer to two different types of chocolate or simply a double helping of cocoa powder. Double […]
Double salts are formed when two cationic or anionic components can crystallize together. They appear as one pure substance but are a solid solution. Alum and Rochelle salt are examples used in cooking and other industries. Some double salts exhibit metallophilic interactions, which could be useful in the communications field. Simple or “single” salts consist […]
