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Pullback Motor
A pullback motor (also ''pull back'' or ''pull-back'') is a simple clockwork motor used in toy cars. A patent for them was granted to Bertrand 'Fred' Francis in 1952 as a keyless clockwork motor. Pulling the car ''backward'' (hence the name) winds up an internal spiral spring; a flat spiral rather than a helical coil spring. When released, the car is propelled forward by the spring. When the spring has unwound and the car is moving, the motor is disengaged by a clutch or ratchet and the car then rolls freely onward. Often the clutch mechanism is geared so that the pullback distance needed to wind the spring is less than the distance the spring is engaged propelling forward. Most of these cars are otherwise free-rolling. Winding them up requires them to be pushed downwards, engaging the clutch. As the motor is only engaged for winding while held down, the complete winding must be completed in one pass, unlike the flywheel motor. Some motors have an internal one-way clutch that allo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Darda Model Car Powered By A Pullback Motor of Rajasthan
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Darda can refer to: * Darda (philosopher), Phoenician philosopher, one of the exemplars of wisdom than whom Solomon was wiser * Rajendra Darda, Indian politician * Vijay J. Darda, Indian politician * Darda, Croatia, a village and a municipality in eastern Croatia * Darda (toy), a car racing set made in Germany *Darda, a card game closely related to Klabberjass *Darda Turki, a village in the Tonk district Tonk district is a district of the state of Rajasthan in western India. The city of Tonk is the administrative headquarters of the district. The district is bounded on the north by Jaipur district, on the east by Sawai Madhopur district, on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clockwork Motor
Clockwork refers to the inner workings of either mechanical devices called clocks and watches (where it is also called the movement) or other mechanisms that work similarly, using a series of gears driven by a spring or weight. A clockwork mechanism is often powered by a clockwork motor, description of the clockwork motor in an antique phonograph consisting of a mainspring, a spiral torsion spring of metal ribbon. Energy is stored in the mainspring manually by ''winding it up'', turning a key attached to a ratchet which twists the mainspring tighter. Then the force of the mainspring turns the clockwork gears, until the stored energy is used up. The adjectives ''wind-up'' and ''spring-powered'' refer to mainspring-powered clockwork devices, which include clocks and watches, kitchen timers, music boxes, and wind-up toys. History The earliest known example of a clockwork mechanism is the Antikythera mechanism, a first-century BC geared analogue computer, somewhat astrolabe-li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toy Car
A model car, or toy car, is a Physical model, miniature representation of an automobile. Other miniature motor vehicles, such as trucks, buses, or even ATVs, etc. are often included in this general category. Because many miniature vehicles were originally aimed at children as Toy, playthings, there is no precise difference between a model car and a toy car, yet the word 'model' implies either assembly required or the accurate rendering of an actual vehicle at smaller scale. The kit building hobby became popular through the 1950s, while the collecting of miniatures by adults started to pick up momentum around 1970. Precision-detailed miniatures made specifically for adults are a significant part of the market since the mid-1980s. The scope of the vehicles involved in the hobby, according to Louis Heilbroner Hertz author of ''The Complete Book of Building and Collecting Model Automobiles'', encompasses "ordinary or stock automobiles, racing cars ([…]), buses, trucks, special ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helix
A helix () is a shape like a corkscrew or spiral staircase. It is a type of smooth space curve with tangent lines at a constant angle to a fixed axis. Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures, known as alpha helices. The word ''helix'' comes from the Greek word ''ἕλιξ'', "twisted, curved". A "filled-in" helix – for example, a "spiral" (helical) ramp – is a surface called ''helicoid''. Properties and types The ''pitch'' of a helix is the height of one complete helix turn, measured parallel to the axis of the helix. A double helix consists of two (typically congruent) helices with the same axis, differing by a translation along the axis. A circular helix (i.e. one with constant radius) has constant band curvature and constant torsion. A ''conic helix'', also known as a ''conic spiral'', may be defined as a spiral on a conic surface, with the distance to the apex an expo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coil Spring
A selection of conical coil springs The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fibulae - the clasps worn by Roman soldiers among others. These are quite commonly found in Roman archeological digs. Coil springs can be either compression springs, tension springs or torsion springs, depending on how they are wound. A coil spring is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded. They are commonly used in mattresses, automotive suspensions, and residential plumbing. Coil springs come in a variety of sizes and shapes and can be used for a variety of applications. Small coil springs are often us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clutch
A clutch is a mechanical device that engages and disengages power transmission, especially from a drive shaft to a driven shaft. In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). In these devices, one shaft is typically attached to an engine or other power unit (the driving member), while the other shaft (the driven member) provides output power for work. Typically the motions involved are rotary, but linear clutches also exist. In a motor vehicle, the clutch acts as a mechanical linkage between the engine and transmission, and briefly disconnects, or separates the engine from the transmission system. This disconnects the drive wheels whenever the clutch pedal is depressed, allowing the driver to smoothly change gears. In a torque-controlled drill, for instance, one shaft is driven by a motor, and the other drives a drill chuck. The clutch connects the two shafts so they may be locked together and spin at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. __TOC__ Theory of operation A ratchet consists of a round gear or a linear rack with teeth, and a pivoting, spring-loaded finger called a '' pawl'' (or ''click'', in clocks and watches) that engages the teeth. The teeth are uniform but are usually asymmetrical, with each tooth having a moderate slope on one edge and a much steeper slope on the other edge. When the teeth are moving in the unrestricted (i.e. forward) direction, the pawl easily slides up and over the gently sloped edges of the teeth, with a spring forcing it (often with an audible 'click') into the depression between the teeth as it passes the tip of each tooth. When the teeth move in the opposite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flywheel Motor
A friction motor is a simple mechanism to propel toy cars, trucks, trains, action figures and similar toys. The motor consists of a large flywheel which is connected to the drive wheels of the toy via a very low gear ratio, so that the flywheel revolves faster. The flywheel's axis is perpendicular to the direction in which the toy faces and moves. When the toy is pushed forward, the drive wheels engage the flywheel. Pushing the vehicle forward repeatedly spins this flywheel up to speed. When let go, the flywheel drives the vehicle forward. The flywheel stores the kinetic energy of the initial acceleration and propels the toy after it is released, by forcing the perpetual motor that revolves the kinetic energy. As the flywheel, unlike the spring of a pullback motor A pullback motor (also ''pull back'' or ''pull-back'') is a simple clockwork motor used in toy cars. A patent for them was granted to Bertrand 'Fred' Francis in 1952 as a keyless clockwork motor. Pulling the car ''ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
One-way Clutch
One-way or one way may refer to: * One-way traffic, a street either facilitating only one-way traffic, or designed to direct vehicles to move in one direction *One-way travel, a trip that does not return to its origin Music *One Way (American band), American R&B-funk band popular from late 1970s through the 1980s *One Way (South Korean band), South Korean R&B/hip hop group managed by YJ Media Albums * ''One Way'' (Selwyn album), Australian R&B singer Selwyn's second album * ''One Way'' (Turbo album), the tenth studio album by Polish heavy metal band Turbo *''One Way of Life'' - the Best of the Levellers Songs *"One Way", a song by Loona yyxy from '' Beauty & the Beat'' *"One Way", a song by Thelma Aoyama from ''Diary'' *"One Way", a single by The Levellers from their 1991 album '' Levelling the Land'' Other uses * ''One Way'' (2006 film), a film by Reto Salimbeni * ''One Way'' (2022 film), an American action thriller * ''One Way'' is a two part documentary series produced by C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Darda (toy)
Darda is the name of a German toy car racing set (and related items) which was most popular in Europe and the USA throughout the 1980s and '90s. The unique selling point of the sets is the special Darda Motor, invented by Helmut Darda in 1970, which propelled the cars (similarly sized to Matchbox or Hot Wheels) at speeds of up to 30 mph (50 km/h). The pullback motor is wound up by pressing down the rear of the car and rolling it forwards and backwards on its wheels. Whilst winding the car up the motor clicks and once fully wound the tone of clicks deepens to signify that it can be wound no more. The cars can be run on any surface but are designed to be run on special Darda tracks which can be bought as sets or individual track pieces. The tracks incorporate loops, jumps, curves and crossovers, and can be combined into quite elaborate creations including multi-level loops and Y-shaped return curves. As with Hot Wheels and Matchbox, a range of cars is available. As Darda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relay Race
A relay race is a racing competition where members of a team take turns completing parts of Race track, racecourse or performing a certain action. Relay races take the form of professional races and amateur games. Relay races are common in running, orienteering, swimming (sport), swimming, cross-country skiing (sport), cross-country skiing, biathlon, or ice skating (usually with a baton in the fist). In the Olympic Games, there are several types of relay races that are part of track and field. Relay race, also called Relay, a track-and-field sport consisting of a set number of stages (legs), usually four, each leg run by a different member of a team. The runner finishing one leg is usually required to pass the next runner a stick-like object known as a "baton" while both are running in a marked exchange zone. In most relays, team members cover equal distances: Olympic events for both men and women are the 400-metre (4 × 100-metre) and 1,600-metre (4 × 400-metre) relays. Some non ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K'Nex
K'Nex is a construction toy system founded by Joel Glickman. It was first introduced in America in 1992. K'Nex is designed and produced by K'Nex Industries Inc. of Hatfield, Pennsylvania. K'Nex was purchased by Florida-based company Basic Fun! in 2018. The toy's building system consists of interlocking plastic rods, connectors, blocks, gears, wheels, and other components, which can be assembled to form a wide variety of models, machines, and architectural structures. While K'Nex is designed for children ages 5-12, a larger version, Kid K'Nex, is aimed towards children 5 and younger. The toy has been released and marketed in various stores, as well as online websites. K'Nex has released various sets, educational kits, and models consisting of assorted parts, the last of which includes parts and instructions specifically packaged to be assembled into a specific model. History The concept behind K'Nex was originally conceived by Joel Glickman while attending a wedding. There, h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
