摘要:
Herein disclosed is an induction heating equipment having a self-exciting chopper type inverter unit having a combination of a silicon controlled or otherwise gate-controlled rectifier and a diode connected in parallel to a d.c. power source for generating heat in a material to be heated through creation of eddy current and hysteresis losses in the material by building up a changing magnetic field induced by a current having suitable frequencies. Protective means are provided in such equipment so that the inverter unit, especially the silicon controlled rectifier of the unit, is protected from incurring a damage when the inverter unit is to be actuated or in the event an unusually increased voltage is produced in the inverter unit during operation. A typical application of the equipment is a cooking equipment using the induction heating process.
摘要:
A machine for relieving the fatigue of fingers comprising a casing with an inner wall, a plurality of elastic fingertips disposed in a somewhat arcuate path along said inner wall, a stationary arcuate depression section along said inner wall, and a movable arcuate pressure member in said casing disposed to act on said fingertips so that they are compressed and allowed to expand alternately by a rhythmic reciprocating motion of said movable arcuate depression toward and away from said stationary arcuate depression.
摘要:
A high-speed web forming and combining apparatus having several web-forming units wherein each of the units dewaters fluid stock in three stages: first, dewatering the material and forming it into a textured fiber mat on a horizontal section of an inner wire, second, dewatering the fiber mat on a cylinder mold and compressing it into a web between the inner wire and an outer belt lying over it, and third, dewatering the web by a stationary water guide means. This produces a completely formed web which is combined with webs from preceding web-forming units.
摘要:
A METHOD IS DISCLOSED FOR ENCAPSULTING HYDROPHOBIC MATERIALS BY APPLYING AN ADMIXTURE OF URETHANE ELASTOMER AND EPICHLOROHYDRIN IN DROPLETS TO A POLYAMINE SOLUTION SO THAT POLYMERIZATION PROCEEDS AT THE INTERFACE BETWEEN THE HYDROPHOBIC LIQUID PHASE AND THE AQUEOUS PHASE TO DEPOSIT A CAPSULAR FILM ON HYDROPHOBIC LIQUID DROPLETS.