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A polesaw (also pole saw or giraffe saw) is a saw attached to a pole or long handle that is used for pruning tree branches that are beyond arm's reach. [1] [2] A polesaw allows its user to cut high branches without the use of a ladder. [3] Polesaws can be manual or motorized.
The starter motor is a series, compound, or permanent magnet type electric motor with a solenoid and solenoid operated switch mounted on it. When low- current power from the starting battery is applied to the starter solenoid, usually through a key -operated switch, the solenoid closes high-current contacts for the starter motor and it starts ...
An automobile starter motor (larger cylinder). The smaller object on top is a starter solenoid which controls power to the starter motor and engages the Bendix drive.. A starter (also self-starter, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power.
Andreas Stihl designed and hand built his first chainsaw in 1926. [5] The saw was electrically powered, and weighed about 48 kg (106 lb). [6] Stihl grew slowly initially, as the chainsaws came to the market about the same time as the Great Depression; with manpower cheap, and old two-man saws proven, there was no need for power saws.
A hedge trimmer, shrub trimmer, or bush trimmer [1] [2] is a gardening tool or machine used for trimming (cutting, pruning) hedges or solitary shrubs (bushes). Different designs as well as manual and powered versions of hedge trimmers exist. Hedge trimmers vary between small hand-held devices to larger trimmers mounted on tractors.
Magnetic flux in shaded pole motor. In certain smaller single-phase motors, starting is done by means of a copper wire turn around part of a pole; such a pole is referred to as a shaded pole. The current induced in this turn lags behind the supply current, creating a delayed magnetic field around the shaded part of the pole face.
A Dahlander motor (also known as a pole changing motor, dual- or two speed-motor) is a type of multispeed three-phase induction motor, in which the speed of the motor is varied by altering the number of poles; this is achieved by altering the wiring connections inside the motor.
A pole lathe in a museum in Seiffen, Germany. A pole lathe, also known as a springpole lathe, is a wood-turning lathe that uses the resilience of a long pole as a return spring for a treadle. Pressing the treadle pulls on a cord that is wrapped around the piece of wood or billet being turned. The other end of the cord reaches up to the end of a ...