screw jack

Screw jacks had previously been used to load the logs.

These screw jacks -" Again the pointer flew to the diagram. "

Screw jacks were used to brace the aluminum against the granite pedestal of the statue.

The tobacco is kept under pressure using oak blocks and massive screw jacks, forcing nearly all the air out of the still-moist leaves.

Before bringing the crane to the location, screw jacks were used to shore up the underground garage roof to hold the crane's weight.

Trim in pitch was achieved by adjusting the incidence of movable wing-tips using screw jacks.

When all of the diggers in all of the cells had completed this process on one section, powerful screw jacks pushed the shield forward.

Capabilities at this facility include cable tension regulators, push/pull controls, actuators, screw jacks and aircrew seats.

Because of the risk of subsidence from the salt workings, the bridges are fitted with screw jacks which allow the deck level to be maintained.

Screw jacks were placed on the corners of the railcar and the car was raised slightly to take its weight off of its wheels.

An older, low-technology method is to use building jacks called screw jacks or jackscrews which are manually turned.

In the most heavy-duty applications, such as screw jacks, a square thread or buttress thread is used, because it has the lowest friction.

Using a combination of steam jacks, screw jacks and chain blocks, this task was completed by the company's riggers in the space of seven hours.

However, most screw jacks have large amounts of friction which increase the input force necessary, so the actual mechanical advantage is often only 30% to 50% of this figure.

It was resuspended by the Irrawaddy Flotilla Company in March 1896 using screw jacks and levers using funds from public subscription.

Traveling nut screw jacks and rigid chain actuators can also be effective at addressing these issues with hydraulic jacks, and are also used for stage lifts.

They in turn sit on floor lifts that rise and fall on screw jacks and can glide on compressed air - "like air hockey," Mr. Malenka said - in and out of a garage area on the wall behind the end stage.

Extension and retraction of the outer wings was made by a screw jacks and nuts operated by the pilot pumping a handle via two-way free-wheel mechanisms, toothed belts and torque shafts which pulled or pushed the outer wings over the inner wings as required.