Abstract: The tumbler wheels have a plurality of false gates, each having a width, depth and/or angular position feature which is a random value selected from within given circumferential, radial and/or angular locational limits, respectively, to foil sophisticated sound wave analyzers. Additonally, the wheel may include an outer periphery whose radius between pairs of adjacent gates is randomly variable within given limits. A method and apparatus for producing the random wheels in large batches includes spindling a large number of blank wheels on an arbor and randomly rotating the arbor selectively relative to a cutting tool which is randomly movable selectively in two axes.

Abstract: A key duplicating apparatus is disclosed which includes a base and platform supporting a reciprocating carriage assembly and a pivotally mounted housing. The carriage assembly has a key securement means which secures a blank key and a template key in alignment for positioning, respectively, with a notch cutting means and a notch depth indicating means, so that a template key may be duplicated by cutting notches of a predetermined depth and position into the shank portion of the blank key.The duplicate key may be cut by use of the template key as a pattern, with a guide cam affixed to the indicating means aligned with a cutter wheel affixed to the notch cutting means. Alternatively, the guide cam may have indicia about its circumference, which may be used to "dial" and decode a manufacturer's code for the purpose of creating a duplicated key. As the guide cam is rotated, the invention may be used to cut a duplicate key from the notch pattern presented in the code.

Abstract: A fence lever control device for a combination lock provides a pivoted plate having an arm positioning a spring to normally bias the fence lever of the lock in a position out of engagement with the fence lever operating cam wheel, with an actuator roller mounted to the cam wheel which engages a follower surface on the pivoted plate once on each complete revolution of the cam wheel in a given direction in response to similar rotation of the dial shaft to which the cam wheel is mounted to thereby shift the pivoted plate and its associated spring mounting arm in an over center fashion to place the spring in a position to bias the fence lever toward the cam wheel, movement of the fence lever into engagement with the cam wheel being prevented by engagement between the fence member and the tumbler wheel assemblies when the wheel assemblies are not oriented in a predetermined relationship.

Abstract: An improved device for preventing unauthorized opening of a combination lock of the type having a plurality of tumbler wheels in conjunction with a fence-lever-actuated bolt in which a tumbler wheel assembly shield having an opening to avoid a rearward expulsion of the dial shaft provides a barrier to unauthorized rearward or radial manipulation of the tumbler wheel assemblies by use of fishing hooks inserted and manipulated from the front of the lock.

Abstract: A barbell-like exercise device having an elongated bar of the type adapted to carry interchangeable weights. The bar is provided with grooved end portions and spaced apart radially enlarged protuberances against which the weights are held by clamping collars. The clamping collars include threadably interconnected cylindrical members which carry radially movable locking members which are adapted to be brought into locking engagement with the grooves in the bar upon relative rotation of the cylindrical members.

Abstract: An easily assembled combination lock has improved tumbler wheel construction, combination changing apparatus, and a bi-positional lock cover which selects between spring-bolt and dead-bolt operation. The improved tumbler wheels have two-piece construction, an inner drive member having a projection, groove and stop assembly cooperating with adjacent tumbler wheels, and a gate ring having a gate and improved gripping apparatus for frictionally engaging the gate ring with the inner drive member. The inner drive member has multiple ratchet teeth about its periphery and the improved gripping apparatus includes a pair of diametrically opposed gripping straps integral with the gate ring, in tension, and tangentially contacting the periphery of the inner drive member imparting a predetermined frictional resistance to rotation. Two normal modes of tumbler wheel operation are contemplated.

Abstract: An improved lock assembly having a plurality of peripherally gated tumbler wheels supported within a housing for rotation about a common axis. A peripherally gated control cam is mounted to the tumbler wheel axis to provide cam operated movement of a fence lever and rotatably attached lock bolt between extended and retracted positions when the peripheral tumbler wheel gates are aligned. A single spring is provided for serving the dual purpose of biasing the fence lever towards the control cam and securing the fence lever to the bolt. Further, precise positioning of the lock bolt and lever when the lock bolt is moved to its extended position are provided by a three point positioning configuration in which special surfaces on the lever are moved into abutment with the lock housing. A new relock spring configuration and system is provided for preventing retraction of the lock bolt when the housing backplate is removed.

Abstract: High security lock assembly adapted for locking two flanges together. The lock assembly includes a lock body having flange retaining walls which define a flange receiving opening. A latch bolt is provided which is slidably mounted transverse of the flange receiving opening for locking to the flanges when they are disposed within the flange receiving opening. A removable shield is provided for removably attaching to the lock body for covering the flange receiving opening thereby preventing external access to the latch bolt when the lock assembly is locked to the flanges. The lock assembly further includes a lock cylinder and associated lock cylinder housing wherein the lock cylinder housing cannot be removed from the lock body except upon special key actuated release. An acid actuated relock mechanism is also provided for blocking movement of the latch bolt when acid is applied in attempts to overcome the lock assembly.

Abstract: A color printer includes a print head assembly including a plurality of independently actuable print heads serially arranged along a printing direction. Each print head includes a plurality of impact pins and an associated different color printing ribbon having a portion disposed between the associated print head and a media to be printed upon. The serial alignment of the print heads enables four color images to be produced by a single pass of the print head assembly along the media in a printing direction. Control apparatus includes pulse modulation circuitry for controlling the impact force of each impact pin to cause intensity modulation of printed colored marks. In addition, a feedback system enables the control apparatus to vary the impact force of each impact pin to maintain good color fidelity.

Abstract: A locking mechanism for security doors such as safes. A mounting plate is provided for attachment to the inner surface of the door. A cylindrical activating member is mounted on a pin for rotation about an axis normal to the inner surface of the door. The activating member contains a plurality of activating fingers and mounting posts for connecting to locking pin actuating mechanisms directly or through linkages. A groove is provided in the periphery of the activating member. A pair of sliding members are mounted to the plate. One sliding member is positioned to slide into the groove to prevent rotation of the activating member. The second sliding member is adapted to slide into abutment with the first member to prevent sliding thereof. Standard lock mechanisms of the combination or pin tumbler type for use with a key are mounted to the plate and connected to the two sliding members to control their movement.

Abstract: A cylindrical type lock has a rotatable cylinder within a lock body wherein the cylinder has a stacked array of a plurality of nested and alternating tumbler wheels and spacer discs mounted in a subassembly with the cylinder to the lock body, the spacer discs are held stationary by tab projections which extend radially outwardly into a longitudinal groove in the cylinder into which they slip fit on assembly along with the tumbler wheels in stacked array into the cylinder, the wheels and discs being formed with identical annular projections on one side and mating annular recesses on opposite sides so that the wheels and discs nest in interfitting relation in the stacked array within the cylinder to be operated by an associated key which has a plurality of spaced segmented disc-like coded webs and blank webs which are adapted to align with the tumbler wheels and spacer discs respectively when the key is inserted into the lock and rotated.

Abstract: A color printer includes a print head assembly including a plurality of independently actuable print heads serially arranged along a printing direction. Each print head includes a plurality of impact pins and an associated different color printing ribbon having a portion disposed between the associated print head and a media to be printed upon. The serial alignment of the print heads enables four color images to be produced by a single pass of the print head assembly along the media in a printing direction. Control apparatus includes pulse modulation circuitry for controlling the impact force of each impact pin to cause intensity modulation of printed colored marks. In addition, a feedback system enables the control apparatus to vary the impact force of each impact pin to maintain good color fidelity.

Abstract: The present sofa bed includes a mattress supporting bed frame which is operable to longitudinally compress a portion of the mattress when the bed frame is moved to a folded and storage seat position. The bed frame or telescoping section which permits longitudinal expansion of the mattress when the bed frame is moved to an unfolded and extended bed position. A simple and lightweight bed frame operating and support linkage operates the telescoping bed section when moved between the stored and extended bed positions. The longitudinal compression of the mattress permits the mattress to be stored in a relatively narrow space and to be expanded to a full length bed dimension when moved to the unfolded and extended bed position.

Abstract: Simplified tumbler wheel construction including an outer gate ring and an inner drive ring wherein the two rings are mounted together in snap-lock fashion.The drive ring includes an undulated surface on its outer rim for mating engagement with an inner undulated surface on the mounting surface of the gate ring. The two rings are constructed of suitable resilient material resulting in passive biasing of the undulated surfaces together during normal operation. Adjustment of the drive ring relative the gate ring is accomplished by blocking rotation of the gate ring while applying a rotative force to the drive ring in excess of a predetermined amount to rotate the undulated surfaces relative each other against the resilient bias provided by the two rings. The amount of bias against rotation is controlled by an appropriately placed slot outward of the undulated surface on the gate ring to lower bias resistance to expansion during tumbler wheel adjustment.

Abstract: A progressive resistance exercising machine having a single, substantially vertical guide column adapted to guide a reciprocating member which is provided with a laterally outwardly extending lifting arm engageable by the trainee. Both the guide column and a weight selector bar to which the reciprocating member is connected extends through centrally disposed apertures formed in a plurality of weights positioned substantially directly below the selector bar. When the selector bar is selectively interconnected with one or more weights in the weight stack, a lifting force exerted on the lifting arm will cause the reciprocating member and the selector bar to move upwardly against the urging of the weights. As the reciprocating member is moved upwardly, the central guide column accomplishes the function of uniquely guiding the travel of both the reciprocating member and the selector bar as well as constraining the path of travel of the weights.

Abstract: A progressive resistance exercising machine having a single, substantially vertical guide column adapted to guide a vertically reciprocative carriage provided with a laterally outwardly extending lifting arm engageable by the trainee. The design of the highly compact machine is unique in that the guide column, as well as a weight selector bar which is connected to the carriage, extends through centrally disposed apertures formed in a plurality of weights positioned substantially directly below the carriage. When the selector bar is selectively interconnected with one or more weights in the weight stack, a lifting force exerted on the lifting arm will cause the carriage and the selector bar to move upwardly against the urging of the weights.

Abstract: A gate ring for a combination lock tumbler that has securing means on the gate ring that normally prevents rotation of the gate ring with respect to the drive member. The securing means includes a cam that alternatively releases the securing means to permit rotation of the gate ring with respect to the drive means or returns the securing means to the normal position. The securing means also comprise a flexible web on the gate ring extending adjacent the outside of the drive member. The cam is mounted between the web and a portion of the gate ring. Rotation of the cam to its normal position moves the flexible web to its normal position against the drive member, and rotation of the cam to its releasing position allows the web to move to its releasing position away from the drive member. The web is integrally formed on the gate ring, which is preferably plastic. The web is located along a chord of the circular gate ring perpendicular to a radius extending from the center of the gate ring through to the cam.