TL;DR: In this article, a plug-in line protector for a communications circuit provides protection for over voltage and over current conditions of the line, where a cup and slug module containing carbon blocks provide an air gap for grounding high voltage transients.
Abstract: A plug-in line protector for a communications circuit provides protection for over voltage and over current conditions of the line. A cup and slug module containing carbon blocks provides an air gap for grounding high voltage transients. For an over current condition, a solder pellet melts causing the cup and slug to engage due to spring pressure and ground the line through a grounding strip. The grounding strip has plastic insulation bonded to a portion thereof and interposed between the line and ground. In an over current condition heat from one of the carbon blocks is transferred through the cup to the metalic strip. This heat may cause the plastic to melt to provide a back-up or secondary low resistance path to ground. The protector may also have a resettable over current responsive mechanism in the form of a heat coil in the line. When the heat coil breaks, a printed circuit board, on which the heat coil is mounted, is moved by a volute spring. In over voltage and in over current conditions, the volute spring conducts current from the printed circuit board to the slug and cup and to ground.
TL;DR: In this paper, a coiled spring includes a plurality of coils with each of the coils being interconnected with one another in a spaced-apart relationship and disposed in a preselected acute angle with the centerline of the coil spring.
Abstract: A coiled spring includes a plurality of coils with each of the coils being interconnected with one another in a spaced-apart relationship and disposed in a preselected acute angle with the centerline of the coil spring for causing the coil spring to exert a constant force in a loading direction approximately normal to the centerline of the coiled spring in response to a deflection of the coil spring along the loading direction. When placed in an operative relationship with a sealing material, the resulting coil spring seal enables positive sealing between cooperating parts to prevent passage of fluid therepast, despite small changes in the spacing between the parts which may change due to eccentricity and part dimension, wear, temperature, or pressure effects.
TL;DR: In this article, a dual stage energy absorbing spring assembly is provided for use in compressors which operate by reciprocating movement of concentric rings to open and seal the valve and cushion the impact of the rings upon opening the valve.
Abstract: A dual stage energy absorbing spring assembly is provided for use in compressors which operate by reciprocating movement of concentric rings to open and seal the valve and cushion the impact of the rings upon opening the valve. The spring assemblies of this invention can comprise two concentrically disposed, oppositely helical springs which are provided with buttons at top and bottom to provide bearing surfaces. One spring is longer than the other such that as the assembly is compressed first one, then two springs resist compression, thus increasing spring rate when the second spring is engaged. One of the buttons serves to retain the inner spring while the opposite button is appropriately configured to compensate for spring misalignment such as might occur due to manufacturing tolerances or as a result of vibration and guide the free extremity of the inner spring into proper seating engagement with the opposite button.
TL;DR: In this paper, an interlaced wave spring is formed from two constituent wave springs of similar thickness, amplitude and frequency, and two wave springs are combined together by interlacing them so that the spring turns of each spring abut each other.
Abstract: An interlaced wave spring is formed from two constituent wave springs of similar thickness, amplitude and frequency The two constituent wave springs are combined together by interlacing them so that the spring turns of each spring abut each other for substantially the entire length of the interlaced spring This interlacing effectively increases the thickness of the spring turns of the interlaced spring to thereby provide increased loading and greater fatigue resistance characteristics
TL;DR: In this article, a conical compression spring with the characteristics of a cylindrical spring of much greater free length is proposed. But the spring is characterized by wire whose diameter diminishes from base to apex end, and by coils whose pitch diminishes between base-to- apex end such that the ratio of mean coil diameter to wire diameter is constant from coil to coil.
Abstract: A conical compression spring having the characteristics of a cylindrical spring of much greater free length. The spring is characterized by wire whose diameter diminishes from base to apex end and by coils whose pitch diminishes from base to apex end such that the ratio of mean coil diameter to wire diameter is constant from coil to coil. Further, each coil diameter is preferably dimensioned to fit within the next larger coil permitting a spring to be designed which exhibits a small solid compressed height.