Clamp-down table

Woolfolk became concerned over the adequacy of the SRV test facilities, which were commonly used by many commercial SRV test and repair shops and most chemical plants. The typical test stand consisted of a clamp-down table connected to a compressed air cylinder by a 1/4-inch (0.6 cm) tubing. Woolfolk experimented with surge accumulators for testing relief valves, using a substantial volume of air to mimic actual process conditions. 

The capping machines consist of a series of small revolving tables upon which the cans are placed with the tops laid loosely in position. The caps are then clamped down from above and are soldered either by hand or by automatic soldering irons. When the cans leave the capping machine they have been completely sealed except for the small vent holeB in the top, through which the air within the cans is to be later exhausted. 

Secure the bench pin to the surface of a table with the C-clamp and place the area of the metal to be sawed across the V of the pin. Saw out the design shape using a vertical sawing motion. Notice that the blade cuts only on the down stroke. When turning a corner, move the saw up and down while slowly turning the metal. 

The inhibitory potencies of three of these molecules agreed with published values for murine Kv 3 (Table 4.1). The one exception was ShK that appeared to be 10-fold less potent than both published values and our own in-house values obtained by manual patch-clamp methods. It has been reported that ShK has a slow on-rate (t= 20 min) for block of Kv 3 (Middleton et al. 2003). This phenomenon may contribute to the reduced potency of ShK in our automated electrophysiology assay, because our protocol included a compound incubation time of only 5 to 10 min. Longer compound incubation times may improve the potency of ShK but would be associated with greater run-down in the K+ current amplitude. We also tested the A LI-selective blocker, dendrotoxin, and not surprisingly it did not inhibit the Kv. 3 current at concentrations up to 167 nM, which is well above its IC50 value for Kv 1.1 in our hands (17 pM data not shown). 

Samples were clamped on its base on a copper water cooled table (Fig 13), so that in addition to the electric arc-induced thermal shock of about 500°C/s, a gradient of approximately 500°C/mm was present in the clamping area, reproducing the temperature gradient of point C in figures 1 and 13. After peak temperature of 1870°C was reached, samples cooled down... 

The formers (and clamps) used must be completely resistant to the fluid being tested, and radii between 30 and 500 mm are found to give an adequate range of strains for most plastics over thicknesses from 2 to 4 mm. The preferred test temperatures are 23. 40, and 55 C. and the preferred durations are 22 to 24 hours for the short-term test and 1.000 hours for the long-term test, although other values may be used. A number of failure criteria are laid down in the standard to facilitate easy identification for specification purposes, and the table here illustrates these. 

A mold-mounting table with a clamping frame above it to hold the sheet. Both the moldmounting table and the clamping frame should move in both up and down directions. 

The rig is composed of two clamps, each 45° from the plane perpendicular to the table, or 90° offset from each other. Once the metal strip is clamped in, a hot torch is run up and down the length of the metal strip, hot-forming it to a shape formed by the clamps. The strip should not be heated any longer than necessary to hot-form it. 

Before any welding begins, aU materials, chiU bars, clamps, hold down bars, work tables, electrodes, and wire, as well as the stainless steel, must he cleaned of aU foreign matter. Moisture can cause porosity in the weld that would reduce corrosion resistance. Organic materials, such as grease, paint, and oils, may result in carbide precipitation. Copper contamination may cause cracking. Other shop dirt can cause weld porosity and poor welds in general. 

Reinstall the completed platen table. Check your labeling to be sure the front rail is facing the front of the machine. The piece of 1-1/4 diam. pipe on the bottom of the platen table should align perfectly with the jack shaft. Then all that is needed to connect the platen table to the jack is a 2 hose clamp. See figure 69. To install the clamp, simply raise the table a bit and slide the 2 hose clamp over the jack shaft. Drop the table back down. Center the clamp around the joint and tighten it. 

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