An article of footwear is disclosed which comprises a vamp, a lower support connected to the vamp and at least one insert mounted in the lower support and which includes an airtight casing having a plurality of elements positioned therein which are elastically deformable such that the biomechanics of the foot of the user are optimized.

There is disclosed a bathtub having interior front end corners between the walls being smoothly curved with a large radius of curvature, about 6 inches, and having pockets recessed into the corners between the front wall and opposite end walls to receive the bottom ends of a shower curtain, thereby permitting the opposite side edges of the shower curtain to be in contact with their respective shower wall substantially the entire vertical length of the curtain. This avoids gaps between the shower...

A turbidimeter with a pair of movable and stationary elements interconnected by a vertically-aligned hinge pin. Interior walls of these elements, when fully closed, define a cylindrical through passageway and an annular shelf which extends outwardly from its upper end. Otherwise, the stationary element, when the movable element has been pivoted away from it, defines one-half of the through passageway bisected lengthwise and a semi-annular shelf. Prior to use, a transparent cuvette can be slideab...

An ultra-low distortion electronic amplifier wherein the global dominant pole is formed by the selection of circuit and component arrangement within the input stage, such that the global dominant pole, is of third order, at audio frequencies. This audio power amplifier implements a high order global dominant pole with the use of operational amplifiers, and this high order dominant pole is distributed across both the voltage amplification stage and input stage without adverse reduction in the sle...

A joining arrangement having at least one engaging member (3, 49), a screw threaded shaft (2) passing through the engaging member at least one nut (7) threadably engaging the shaft, a gear member (9), a pivot locator (14) on the engaging member such that a shaft (10) with a second gear member (12) may inter engage with the pivot locater while having the said second gear member adapted to interengage with the said first gear member whereby to facilitate a tightening of the joining arrangement.

Triple locking handcuffs are provided having a lock which has an abutment erein which pushes against a bolt in the lock to double lock the latch and triple lock the ratchet and pawl of the lock. In the triple locked position a biasing means forces the bolt against the abutment, and to unlock the handcuffs a number of different mechanical means are provided for moving the bolt slightly away from the abutment, whereupon the ordinary handcuff key can be used to unlock the handcuffs. Handcuffs are a...

An electrolyzer consisting of a stack of elemental electrolytic cells held between two end plates connected by tie rods. Each tie rod (9) is associated with a hydraulic jack (20) enabling variable tightening by remote control. A displacement pick-up (16) and a pressure pick-up (17) supply signals (25,26) to a force and position control cabinet (18). The invention is made use of in the production of hydrogen and oxygen by electrolysis of water.

Improvements for an incinerator system including double reburn tunnels, an excitor within a reburn tunnel, a choker for closing off part of a reburn tunnel, a grate near the incinerator's inlet to permit the drying and initial combustion of refuse, an ash scoop which remains out of the water during most of its operation. The use of dual reburn tunnels, along with a damper that permits the closure of at least one of them, permits the efficient and environmentally acceptable utilization of the mai...

The valve housing includes a bore in which a valve spool is reciprocally mounted. A pilot and vent port communicates with such bore at one of its ends; an inlet port communicates with such bore intermediate its ends. The valve spool includes a head which reciprocates between the aforesaid ports. Such head includes an annular groove in which a ring of low-friction material is mounted, this ring forming a partial seal with the aforesaid bore thereby to control the pressure differential or drop acr...

The kayak improvements include a method for embedding a nut in the material of a kayak hull during a rotational molding process and structure for use with such an embedded nut to hold a frame in place.