Even in the recent history of water power engineering when water wheel (and then, a turbine) dominated absolutely as water powered prime mover of rotation type we can see some examples of reciprocating mechanisms for practical applications.
Very interesting in this respect to the original mechanism under “Tom and Jerry” name, followed in the 18th century in the coal mines of England to pump water from underground mines.
“Tom & Jerry” mechanism is the closest analogue to the Discrete Power Converter (DPC) , in which can already be found quite a lot of common technical features: the accumulating of flowing mass (water) in the bucket, discrete mode of operating (accumulating phase and stroke), reciprocating motion of bucket.
In our contemporary time we can see some projects related to reciprocating type of mechanisms powered by gravity force primarily and rocking lever in kinematics has been involved:
A new method is proposed for harnessing of human power based on children’s play in playgrounds and public places, on devices such as the seesaw, merry-go-round, and swing. When large numbers of children play in a playground, part of the power of their play can be usefully harnessed resulting in significant energy storage. This stored energy can then be converted to electricity for powering basic, low-power appliances such as lights, fans, communications equipment, and so on. The method provides a low-cost, low-resource means of
generation of electricity, especially for use in developing countries. The paper discusses the basic theory behind the method. Results of experiments on a laboratory prototype compressed air human power conversion system using a teetertotter are presented to illustrate the practical effectiveness of the proposed method.
Shunmugham R. Pandian; Department of Electrical Engineering and Computer Science; Tulane University; New Orleans, LA 70118; A Human Power Conversion System Based on Children’s Play
or another example
The goal of Team 7 is to design, build, and test a human powered pump. Our pump will
reliably produce a significant volume of low-pressure water intended for irrigation use. The design will incorporate two positive displacement piston pumps. Each pump will be single-acting in an attempt to simplify design. The drive mechanism will be a “teeter-totter,” with the pumps attached to either side of the bottom of the fulcrum and the underside of the teeter-totter platform. The up and down movement of the teeter-totter will provide the necessary reciprocating action for the pumps. This design will allow for the primary use of body weight, combined with muscle and coordination (as opposed to simply using muscle), to power the pump. The desired effect is to allow for extended pumping periods.
Teeter Water – Team 7 – October 23, 2000; Kyle, Jennifer, Dana, George, Matthew; Principal Writer: Jeff, Team Leader: Jeff; Design Review
Indian Company produces JOY PUMP ……See Saw Pump
Joy pump is an innovative concept of pumping water from a bore well, a sump or a rain water collector tank. It uses playful energy of the children or the operators collectively to pump water. The Joy pump can draw water from a well and further lift it to an over head tank above the ground level for storage and distribution. It does not require electric power. It is an eco-friendly, child friendly pump.
The sand as working medium for prime mover (wheel) powered by gravity force.
You are welcome to add any relevant information about subject of discussion – non traditional prime movers powered by gravity force.
We beg to inform you that we are ready to consider any kind of cooperation in developing and promoting of DPC project.
We will be glad to answer any technical questions on the design, prototyping and applications this non-traditional machine.
for contacts: firstname.lastname@example.org