Abstract: A scale testing cart for transporting and positioning weights to effect the calibration of a platform scale is disclosed. The cart includes a generally rectangular frame having a peripheral rail which retains a plurality of calibrated weight blocks, a front pair of wheels for steering, a rear pair of wheels for driving and braking and a hydraulic pump driven by a gasoline engine which supplies the power to effect the steering, driving and braking of the cart.

Abstract: An apparatus for manufacturing glass bottles is disclosed which includes consecutively delivering gobs of molten glass into a blank mold, forming each gob into a parison, transferring the parisons alternately into at least two sets of blow molds, allowing said parisons to reheat, and expanding the parisons in the blow molds. The sets of blow molds recipricate along a substantially vertical path. A first position where the parisons are alternately received by the blow molds and blown containers removed is located on the vertical path. The parisons are expanded and cooled in the blow molds by blowing them out or by applying a vacuum, or a combination of those means at a second position on the vertical path. The apparatus is an improvement to forming sections of the well known Hartford type I.S. machine.

Abstract: A safety device for an electrode-type steam vaporizer having an electrode assembly enclosed in a protective housing allows access to the electrodes for cleaning or adjustment only when a key, preferably the electric plug for the vaporizer, is inserted through an opening in the protective housing to release an interlock mechanism normally precluding removal of the protective housing from the electrode assembly. When the protective housing is removed, the key is automatically locked in the opening in the protective housing by a spring-biased lock pin and cannot be removed until the electrode assembly is again repositioned in the housing with the electrode assembly and housing properly assembled relative to each other. The safety device can be used in other electrical appliances, such as a toaster, that have electrical elements enclosed in a protective housing.

Abstract: An improved liquid to gas seal is disclosed for a bi-directional rotatable shaft. The seal is of the annular lip type and has a circular sealing edge which engages the shaft. The gas side of the seal is provided with an annular bead parallel to and spaced from the sealing edge and with a plurality of asymmetrical ribs which efficiently pump liquid escaping past the sealing edge back to the liquid side of the seal.