Abstract: A laminated device such as a bearing or coupling comprising an inner and an outer housing with a laminate therebetween of alternating resilient and non-extensible layers wherein at least one of its resilient layers is made of a material characterized by having a damping coefficient different from that associated with the material of at least one other resilient layer and preselected so as to improve the uniformity of the strain distribution within the laminate and, thereby, the low temperature operating characteristics of the device. In another embodiment of the invention, at least one of the resilient layers is comprised of discrete portions or segments, each having a nominal damping coefficient preselected so as to improve the bearing's operating characteristics in low temperature applications.

Abstract: A bearing for carrying compressive radial loads comprising alternating bonded layers of a resilient material of a uniform modulus of elasticity and layers of a non-extensible material, all generally concentrically formed about a common center axis. The fatigue life of the bearing under torsional and compressive loads is enhanced by progressively decreasing both the length and thickness of each layer of resilient material with increasing radii, so that a substantially equal strain is carried across each layer of resilient material in response to each torsional load and the shape factor of each of the layers of resilient material remains substantially constant or increases with increasing radii.

Abstract: A cable bushing including a frame portion, and a filler portion connected to the frame portion, the filler portion being movable between a first position in which the filler portion is remote from the interior of the frame portion and a second position in which the filler portion is disposed substantially within the frame portion, the frame portion being adapted to occupy an opening in a partition structure and being further adapted to receive a cable therethrough.

Abstract: A component adapted for attachment to a library unit stand for use in storing magazines, pamphlets and other information-bearing media, said component comprising a frame assembly having means for attaching it to a library unit stand, and a shelf assembly mounted to the frame assembly so as to be movable from a first media-storing position where it is in a plane that is horizontal or nearly horizontal and a second media-displaying position where its rear end has been advanced and its front end has been lowered so that it is inclined at a selected angle for displaying the media stored thereon.

Abstract: A blade retention system for use in a fully articulated rotor head of a rotary wing aircraft is described. The retention system comprises a separate elastomeric bearing means for carrying loads in compression and accommodating motions about the respective flapping, lead-lag, and pitching axes of the rotor head in shear for each type of motion about the respective flapping, lead-lag and pitching axes of the rotor head.

Abstract: A motor speed control system (controller) for controlling the speed of an AC motor. The invention provides sufficient voltage at low motor speeds to overcome the high resistance of fractional H.P. motors, which effects low speed operation, i.e., the ability to provide constant load torque. With the present invention an output frequency voltage offset is provided in a non-linear fashion so that desired load torque is developed over the entire speed range of the control system.

Abstract: A coupling of the "Tracta" joint type comprises a driving member rotatable about a first axis, a driven member rotatable about a second axis, and two intermediate members for operatively coupling the driving member to the driven member. The improvement comprises elastomeric bearing means disposed between and engaging each set of mutually opposing bearing surfaces of the driving, driven and intermediate members under compression when torque is applied to the driving member about the first axis.

Abstract: A storage file of open box-like form for storing books, documents, cassettes, discs and the like in a suspension filing system is disclosed herein. In one embodiment the storage file includes on its top a hook and a lock means, designed to prevent inadvertent disengagement of the hook, Another feature is an interlock which cooperates with a strap-like member disposed parallel to a hanger bar in the filing system to prevent rotation of the storage file while it is suspended from the hanger bar.

Abstract: A multi-ring loose-leaf binder which incorporates hooks adopted to detachably secure the binder to a horizontal bar of a suspension filing system, recessed into the top edges of its front and back covers. The binder is further provided with a hinged jack recessed within its spine and which may be extended to prop the open binder at a convenient angle to a horizontal work surface.

Abstract: A caster assembly comprising an outer part for attachment of the assembly to a structure to be mobilized, said outer part having spaced parallel side walls, an inner part having spaced parallel side walls nested within the outer part with its side walls spaced from and parallel to the side walls of the outer part, wheel supporting legs to which a wheel is journaled, pins rotatably supporting the wheel supporting legs between the side walls of the inner and outer parts and elastically resilient members connecting the wheel supporting legs to the spaced parallel walls of the inner and outer parts in areas centered about the axes of the pins, said elastically resilient members being elastically deformable in torsion.

Abstract: A document holder or filing device comprising a rigid spine piece dimensioned to accommodate the spine of the binding of a book-like item to be filed, said spine piece having head and tail ends, and at least one finger at both head and tail ends dimensioned and movably disposed to engage the associated head and tail ends of the spine between themselves and the spine piece, first and second interlocking means so configured and disposed as to be engageable one with the other and, when engaged, prevent the further relative movement of the fingers and thereby maintain the book-like item captive within the holder, and resiliently distortable means biased so as to maintain said first and second interlocking means in engagement and manually distortable so as to permit the disengagement of the interlocking means and thereby the release of the binder from the document holder.

Abstract: A frusto-conical laminated elastomeric bearing is provided wherein at least some of the layers are graded in composition so that they have a first relatively high modulus of elasticity at the inner circumference, and a second relatively low modulus of elasticity at the outer circumference, with the grading being arranged so as to provide an optimum balance of strain distribution and spring rates consistent with bearing lifetime and reduced-torque considerations.

Abstract: A cylindrical elastomeric bearing for carrying relatively large compressive radial loads while accommodating thrust and torsional loads acting along the bearing's longitudinal axis. The bearing generally comprises a rigid interior member and a rigid exterior member, with the two members being joined together by bonded concentric laminae comprising alternating strata of resilient material and non-extensible material. The fatigue life of the bearing is enhanced by forming each resilient stratum with a shear modulus of elasticity such that the stratum will tend to carry a strain substantially equal to the strain carried by every other resilient stratum when the bearing is subjected to a wide range of different torsional loads.

Abstract: An improved Oldham type coupling comprising elastomeric laminated bearings between the conventional bearing surfaces to improve the compression load capacity of the bearing surfaces of the coupling as well as provide other advantages. In one embodiment the bearings are designed so that the coupling is capable of operating as a constant velocity coupling.

Abstract: Isolation fasteners for securing one structural part to another in such a way as to minimize transmission of vibration and sound from one part to the other comprising, in combination, fastening means for securing the parts to each other and interposable elastomeric systems designed to be disposed between the parts and about the fastening means.

Abstract: An isolator designed to prevent transmission of shock and vibration from one structure to another, comprising a device structured to provide orthogonal excursion in three directions and comprising a plurality of nested, concentrically-arranged component structures, each of which is structured to permit orthogonal excursion and a connector element for securing structures in nested parallel relation so that the composite resistance to displacement is the sum of the resistances of the individual components. The component structure may decrease in size from the outside to the inside or be all of the same size.

Abstract: A hydraulic clamp comprising an assembly of concentrically-arranged parts wherein axial movement of a first part effects rotation of a second part and axial movement of a third part effects a corresponding axial movement of the second part and wherein the first part controls supply of pressure fluid to the third part so that rotation is first imparted to the second part and thereafter axial movement is imparted thereto and wherein a clamp arm is fixed to said second part.

Abstract: A thrust bearing adapted for high and low pressure loading for supporting an end of a shaft for rotation about its longitudinal axis comprising a ball bearing confined in concentric relation at the end of the shaft to be supported and a part recessed into the end of the shaft which rests against the ball bearing structured to dissipate heat and of a composition such that at high loads and high velocity, it functions as a solid lubricant and at low loads and low velocity, it functions as a solid.

Abstract: A device is provided for measuring the amplitude of vibration of a vibratory element. The vibratory element or reed has a vane attached to it extending between opposed fiber optics light guides. The vane has a mask portion which has slits forming alternating light-transmitting elements and opaque elements uniformly spaced in the direction of movement of the vane and lying in the path of light between the light guides. One of the light guides has a stationary mask with at least one slit corresponding in size and orientation to those of the vane. When light is transmitted from one of the light guides to the other while the vibratory member is vibrating, the light must pass through the slits of the masks and is alternately transmitted and cut off. By counting the number of minimum light transmissions, therefore, the amplitude of the vibration can be determined.