Pullback motor: Difference between revisions
ClueBot NG (talk | contribs) m Reverting possible vandalism by 207.183.179.172 to version by Andy Dingley. False positive? Report it. Thanks, ClueBot NG. (1441412) (Bot) |
Entranced98 (talk | contribs) Importing Wikidata short description: "Simple clockwork motor used in toy cars" |
||
| (34 intermediate revisions by 25 users not shown) | |||
| Line 1: | Line 1: | ||
clockwork motor used in toy |
|||
[[File:Darda model car powered by a pullback motor.jpg|thumb|Darda model car powered by a pullback motor]] |
|||
A '''pullback motor''' (also ''pull back'', ''pull back and go'' or ''pull-back'') is a simple [[clockwork motor]] used in [[toy car]]s. A patent for them was granted to Bertrand 'Fred' Francis in 1952 as a keyless clockwork motor.<ref>{{cite book|last1=May|first1=James|authorlink=James May|title=Toy Stories|year=2009|publisher=Conway|location=London|isbn=9781844861071|page=[https://archive.org/details/jamesmaystoystor0000mayj/page/175 175]|url=https://archive.org/details/jamesmaystoystor0000mayj/page/175}}</ref><ref>{{Cite patent|country=US|number=2795294|title=Keyless device for winding up clockwork mechanism|pubdate=1957-06-11|inventor1-last=Francis|inventor1-first=Bertram F.}}</ref> |
|||
Pulling the car ''backward'' (hence the name) winds up an internal [[coil spring]]. When released, the car is propelled forward by the spring. Once 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.<ref name="Darda, standard motor" >{{Cite web |
|||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
}}</ref> |
|||
up the is the , the motor [[ ]] .<ref name="Darda, standard motor"> |
|||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
|url-status = dead |
|||
|archiveurl = https://web.archive.org/web/20030423011846/http://www.onlytoys.com/toystore.taf?do=skudetail&sku=D11713 |
|||
|archivedate = 2003-04-23 |
|||
}}</ref> 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.<ref name="Darda, standard motor" /> 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 allows winding with a back-and-forth motion.<ref name="Darda, standard motor" /> |
|||
Some pullback motors, usually intended for racing in pairs, have used a catch and release mechanism to retain their springs. These may be wound separately, then launched together by releasing their spring triggers. [[Darda (toy)|Darda]] use such a mechanism for their ''Stop'n'Go'' motor.<ref>{{Cite web |
Some pullback motors, usually intended for racing in pairs, have used a catch and release mechanism to retain their springs. These may be wound separately, then launched together by releasing their spring triggers. [[Darda (toy)|Darda]] use such a mechanism for their ''Stop'n'Go'' motor.<ref>{{Cite web |
||
|title=Darda Stop'n'Go replacement motor |
|title=Darda Stop'n'Go replacement motor |
||
|url=http://www.onlytoys.com/toystore.taf?do=skudetail&sku=D11714 |
|url=http://www.onlytoys.com/toystore.taf?do=skudetail&sku=D11714 |
||
|publisher=onlytoys.com |
|publisher=onlytoys.com |
||
|url-status = dead |
|||
|archiveurl = https://web.archive.org/web/20100829180913/http://www.onlytoys.com/toystore.taf?do=skudetail&sku=D11714 |
|||
|archivedate = 2010-08-29 |
|||
}}</ref> This is pre-wound, then releases automatically when shunted from behind. This allows [[relay race]]s to be set up with multiple cars. |
}}</ref> This is pre-wound, then releases automatically when shunted from behind. This allows [[relay race]]s to be set up with multiple cars. |
||
A few pullback motors are used in toys other than cars. The [[K'Nex]] construction toy has such a motor, as have some later [[Meccano]] sets. |
A few pullback motors are used in toys other than cars. The [[K'Nex]] construction toy has such a motor, as have some later [[Meccano]] sets. |
||
The very simplest of these motors may use a stretched [[rubber band]] as a linear spring, rather than a coil spring. These are bulky and less powerful but require little manufacturing sophistication: coil springs, although apparently simple, demand a highly developed steel [[metallurgy]]. For this reason these toys are usually home- or crafts |
The very simplest of these motors may use a stretched [[rubber band]] as a linear spring, rather than a coil spring. These are bulky and less powerful but require little manufacturing sophistication: coil springs, although apparently simple, demand a highly developed steel [[metallurgy]]. For this reason these toys are usually home- or craftsmade. |
||
== References == |
== References == |
||
| Line 25: | Line 34: | ||
[[Category:Mechanical toys]] |
[[Category:Mechanical toys]] |
||
{{Engineering-stub}} |
|||
{{toy-stub}} |
{{toy-stub}} |
||
Latest revision as of 14:54, 10 March 2024
A pullback motor (also pull back, pull back and go 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.[1][2]
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.[3] 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.[3] 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 allows winding with a back-and-forth motion.[3]
Some pullback motors, usually intended for racing in pairs, have used a catch and release mechanism to retain their springs. These may be wound separately, then launched together by releasing their spring triggers. Darda use such a mechanism for their Stop'n'Go motor.[4] This is pre-wound, then releases automatically when shunted from behind. This allows relay races to be set up with multiple cars.
A few pullback motors are used in toys other than cars. The K'Nex construction toy has such a motor, as have some later Meccano sets.
The very simplest of these motors may use a stretched rubber band as a linear spring, rather than a coil spring. These are bulky and less powerful but require little manufacturing sophistication: coil springs, although apparently simple, demand a highly developed steel metallurgy. For this reason, these toys are usually home- or crafts made.
References
[edit]- ^ May, James (2009). Toy Stories. London: Conway. p. 175. ISBN 9781844861071.
- ^ US 2795294, Francis, Bertram F., "Keyless device for winding up clockwork mechanism", published 1957-06-11
- ^ a b c "Darda standard Mega-motor". onlytoys.com. Archived from the original on 2003-04-23.
- ^ "Darda Stop'n'Go replacement motor". onlytoys.com. Archived from the original on 2010-08-29.
 | This engineering-related article is a stub. You can help Wikipedia by expanding it. |
 | This toy-related article is a stub. You can help Wikipedia by expanding it. |