Universal Governor Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-DOMLE-9129
Jlab Export is a leading Universal Governor Apparatus Manufacturer,and suppliers in India
The universal governor apparatus lets students run Porter, Proell and Hartnell governors on one motor-driven spindle and compare how each responds to speed. A small electric motor drives the spindle through a flexible coupling and a bevel reduction gear box, or a belt and pulley system. A speed control unit sets the speed, and a spindle extension takes a hand tachometer.
Specifications
| Governors | Porter, Proell and Hartnell, mounted on the spindle in turn |
| Hartnell governor | Can be run as a stable or an unstable governor |
| Porter and Proell governors | Centre sleeve with a weight sleeve for added weights |
| Drive | Small electric motor, flexible coupling, bevel reduction gear box or belt and pulley |
| Spindle | Driven by a solid coupling from the gear box output shaft, supported on ball bearing |
| Speed | Speed control unit, spindle extension for a hand tachometer |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Experiments on Governor Characteristics
For each governor, students raise the speed in steps, record the speed and the sleeve lift at each step and plot the governor characteristic. Speed is read with a hand tachometer on the spindle extension, or checked without contact using a Stroboscope. Sleeve lift can be read against a Steel Rule held beside the sleeve.
Adding weights to the Porter and Proell sleeve shows how a heavier sleeve raises the speed range. Running the Hartnell governor in its stable and unstable settings shows the difference on the graph. Teachers often pair this with the Flywheel Apparatus: a flywheel smooths speed within each cycle, while a governor holds the mean speed as the load changes.
Frequently Asked Questions
Which governors can be tested on this apparatus?
Porter, Proell and Hartnell governors. Each mechanism mounts on the spindle in turn. The Porter and Proell centre sleeve takes added weights, and the Hartnell governor can be run as a stable or an unstable governor.
How does a Proell governor differ from a Porter governor?
Both are loaded by a central sleeve weight. In the Proell governor the balls sit on upward extensions of the lower arms, not at the arm joints. This changes the speed at which it holds a given sleeve height.
What do sensitiveness and stability mean for a governor?
Sensitiveness compares the speed range between the lowest and highest sleeve positions with the mean speed: a smaller range means a more sensitive governor. A stable governor has one sleeve position for each speed, with the balls moving out as speed rises.
Why can the Hartnell governor become unstable?
Its spring and ball arm geometry decide how the controlling force changes with radius. If that force does not rise fast enough as the balls move out, the sleeve has no steady position for a given speed and the governor is unstable.
How is spindle speed measured?
A hand tachometer is held on the spindle extension provided for it. A stroboscope can be used as a non-contact check, which avoids loading the spindle at low speeds.
Other Theory of Machines Apparatus
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Last updated: 5 November 2026
