Abstract: An improved security system to prevent unwanted entrance through a hinged barrier, such as, but not limited to a door, is provided and comprises a member associated with the barrier, whether internal or eternal to the barrier, and adapted to extend from a first length to a second length. An actuation mechanism is coupled to the member and is adapted to extend the member from the first length to the second length and to contract the member from the second length to the first length. A receptacle is provided adjacent the barrier for receiving a portion of the member when the member is extended by the actuating mechanism. A hinge assembly is provided and is disposed substantially opposite the receptacle and adjacent the barrier and is coupled to another end of the member, such that when the member is actuated to the extended position, the member, receptacle and hinge assembly form a security system to prevent unwanted entrance through the barrier.

Abstract: An exercise and rehabilitation chair and method includes pivotal front support legs, rigid rear legs, a seat assembly having a seat bottom and seat back and upper and lower arms, each upper and lower arm being pivotally coupled at a rearward end to a pivotal support arm rigid with a seat back and at a forward end to an upper end of a pivotal front leg. Bearing structures pivotally connect corresponding support arms and rear legs and establish a fulcrum about which the seat assembly may rotate. The bearing structures are simultaneously adjustable longitudinally along the pivotal support arms and rigid rear legs with displacement of the fulcrum relative to a user's hips regulating the resistance of chair operation. A foot assembly is pivotally coupled to the front legs and the forward ends of the upper and lower arms. All pivotal connections correspond anatomically to a user's joints for low joint stress and low-resistance exercise.

Abstract: An exercise and rehabilitation chair includes a framework having lower frame members, pivotal front legs, and elongate rear legs. The chair includes a seat assembly having a seat bottom and seat back and upper arms, each upper arm being pivotally coupled at one end to a generally upstanding support arm and at an opposed end to a front leg. Bearing housings pivotally connect corresponding support arms and rear legs and establish a fulcrum about which the seat assembly may rotate. The bearing housings may be slidably positioned longitudinally along corresponding support arms and rear legs using pin fasteners or, alternatively, using motorized gear assemblies. The displacement of the fulcrum relative to a user's hips is adjustable for regulating the resistance of chair operation. A foot assembly is pivotally coupled to the front legs. All pivotal connections correspond anatomically to a user's joints for low joint stress and low-resistance exercise.

Abstract: An exercise and rehabilitation chair and method includes pivotal front support legs, rigid rear legs, a seat assembly having a seat bottom and seat back and upper and lower arms, each upper and lower arm being pivotally coupled at a rearward end to a pivotal support arm rigid with a seat back and at a forward end to an upper end of a pivotal front leg. Bearing structures pivotally connect corresponding support arms and rear legs and establish a fulcrum about which the seat assembly may rotate. The bearing structures are simultaneously adjustable longitudinally along the pivotal support arms and rigid rear legs with displacement of the fulcrum relative to a user's hips regulating the resistance of chair operation. A foot assembly is pivotally coupled to the front legs and the forward ends of the upper and lower arms. All pivotal connections correspond anatomically to a user's joints for low joint stress and low-resistance exercise.

Abstract: An exercise and rehabilitation chair includes a framework having lower frame members, pivotal front legs, and elongate rear legs. The chair includes a seat assembly having a seat bottom and seat back and upper arms, each upper arm being pivotally coupled at one end to a generally upstanding support arm and at an opposed end to a front leg. Bearing housings pivotally connect corresponding support arms and rear legs and establish a fulcrum about which the seat assembly may rotate. The bearing housings may be slidably positioned longitudinally along corresponding support arms and rear legs using pin fasteners or, alternatively, using motorized gear assemblies. The displacement of the fulcrum relative to a user's hips is adjustable for regulating the resistance of chair operation. A foot assembly is pivotally coupled to the front legs. All pivotal connections correspond anatomically to a user's joints for low joint stress and low-resistance exercise.

Abstract: An adjustable saddle mechanism for a guitar string comprises upper and lower saddle elements. A compound lever system is provided to lock the saddle elements in any one of an infinite number of positions.

Abstract: A standard guitar or bass guitar, and method, in which a combination worm wheel and ratchet wheel is combined with a combination worm element and pawl element. The result is highly efficient coarse tuning and fine tuning of a guitar string. In accordance with another invention, an adjustable saddle mechanism is provided for a guitar string. It comprises upper and lower saddle elements. A compound lever system is provided to lock the saddle elements in any one of an infinite number of positions.

Abstract: A rotary table for a bakery product slicer in which mechanism is provided that for a given length of crank throw can be adjusted to rotate a turntable through selectably adjustable angular increments.

Abstract: A machine to divide pastry into portions, leaving a separator at each separation. A turntable supports the pastry, and a blade descends to drive the separator into the pastry. The turntable is rotated incrementally, and the blade's stroke and initial height are adjustable to accommodate pastries of various heights.

Abstract: A check valve is inserted in a tubing such as a catheter for transmission of dry gas such as to the bladder of a person. It prevents the flow of liquid such as urine through it by means of a plug of a foam material which permits the flow of dry gas through it and past end discs of a material which expands in the presence of liquid to plug up the passageway of the valve thereby preventing liquid from flowing through it.