Abstract: A chair adjustment mechanism is disclosed which allows a change of position in an unlocked state and maintains a position in a locked state. The mechanism, when used in conjunction with an adjustable chair part, may not be unlocked without a force being applied opposite to a force urging the part to a default position.

Abstract: A chair height adjustment mechanism which can be retrofit to a chair comprises a rod with a circumferential notch proximate one end for insertion through openings in the chair seat support bracket above a valve opening member of the chair height adjustment cylinder such that the rod is free to tilt against the valve opening member. The circumferential notch receives the looped end of the inner wire of a co-axial cable. The sheath of the cable is supported by a flange of a support member. The support member has an opening which receives the adjustment cylinder and a wheel which redirects the inner wire from the rod toward the flange. The other end of the co-axial cable terminates in a user actuator which may be mounted to the underside of the chair seat.

Abstract: A chair seat tilt lock comprises a slider riding along a track on the seat and an abutment extending from chair seat post. The slider is spring biased into registration with the abutment to block the chair against tilting and may also be moved away from the abutment so that the chair is then free to tilt. The slider is mover by a lever arm connected to the slider by a co-axial cable with an enlargement at the end of the inner cable which allows the cable to be releasably press fit into a skeleton key-shaped passageway through the slider.

Abstract: A chair armrest bar is horizontally slidably received in a channel of a base attached to a chair seat. The base defines longitudinally arranged interconnected slots in its bottom wall. A locking lever is pivotably mounted to the armrest bar. The lever has a locking pin which is biased into one of the slots to lock the armrest in position; the lever may be tilted to an unlocking position to allow the bar to slide. The lever is releasably attached to the bar by a mount so that the lever may be removed to allow replacement of the bar.

Abstract: A chair armrest adjustment mechanism for an armrest is disclosed. The armrest adjustment mechanism includes a first member, an upstanding second member for mounting to an armrest support member, and a third member having attachment means for fixedly attaching the third member to an armrest pad. The third member and the second member have a pin and slot arrangement to limit the rotational movement of the third member. The first member is pivotally mounted to the second member via a pin such spring cups between the first member and the second member at either side of the pin for biasing the first member to a level orientation with respect to the second member.

Abstract: An improved seat back height adjustment mechanism for a chair is disclosed. The improved height adjustment mechanism includes a U-shaped mounting bracket having a back wall and two side walls. A longitudinal shaft having a handwheel is rotatably mounted in the bracket between the side walls and spaced from the back wall. A seat back support arm is insertable through the bracket between the shaft and the bracket back wall. A back plate provided with a rack and an adjacent planar surface both extending along the length of the back plate is mounted onto the seat back support arm. In one aspect, the shaft is provided with a pinion for engaging the rack and a multi-sided, symmetrical cam adjacent the pinion for locking the shaft against free rotation. When assembled, the rack and the planar surface of the back plate are aligned with the pinion and cam respectively.

Abstract: An improved height adjustment mechanism for a chair seat back is disclosed. The improved height adjustment mechanism includes a U-shaped mounting bracket having a back wall and two side walls. A longitudinal cam having a handle is rotatably mounted in the bracket between the side walls and spaced from the back wall. A seat back support arm is insertable through the bracket between the cam and the bracket back wall. The cam is provided with a plurality of planar faces extending in the longitudinal direction disposed around about a third of the circumference of the cam. The radial length of the line extending perpendicularly from each planar face to the longitudinal axis of the cam increases steadily from one planar face to the next in one direction around the circumference of the cam. This steady increase in distance of the planar faces from the axis of the cam provides a cam action on the seat back support arm when the cam is rotated in one direction with the support arm located between the cam and back wall.

Abstract: There is disclosed a unitary brake for a chair tilt mechanism. The chair tilt mechanism is of the type having a seat back support mechanism biased with respect to a seat tilt mechanism, the seat back support mechanism provided with a mounting bracket and the seat tilt mechanism has a housing attachable to the underside of a chair. The mounting bracket is pivotally attached to the housing adjacent to an end portion thereof. The unitary brake comprises a spindle bracket pivotally mounted in the housing for receiving therein a chair support spindle. The spindle bracket has a plurality of parallel slotted arms extending therefrom with the spindle bracket and the arms being of one piece unitary construction. The unitary brake includes a rear lammal pivotally mounted on the mounting bracket. The rear lammal includes arms interleaved with the spindle bracket arms. The rear lammal arms have slots extending therethrough which are in registration with the slots in the spindle bracket arms.

Abstract: A chair control mechanism of the type having a seat support member pivotally mounted on a leg mounting member, and a spring loaded adjustment mechanism for controlling the pivotal movement of one member with respect to the other. The adjustment mechanism includes a handle mounted on an adjustment screw for movement therealong to compress or allow extension of the compression spring. A nut is threadedly mounted on the adjustment screw and serves to retain the members, adjustment screw and spring in an assembled configuration during shipping to and assembly of a chair by a chair manufacturer. A hand wheel is provided for attachment to the nut after the control mechanism has been assembled and installed in a chair. The hand wheel has a body of plastics material in which a seat formed which is proportioned to accommodate and adapted to cooperate with the nut such that when the nut is seated therein, rotation of the hand wheel will cause rotation of the nut with respect to the adjustment screw.

Abstract: A readily removable and replaceable acoustical pad for an interior space dividing system of the type having horizontal and vertical frames forming generally rectangular pad receiving windows with the upper horizontal frame member of each window having a depending flange or flanges forming a tongue, each pad having an upwardly opening central groove along the top edge adapted to mate with the tongue whereby the pad may be inserted in the window by first mating the groove with the tongue and then pivoting the pad to a vertical position into a snug fit in the window. The pad is preferably foam and fabric covered to deform along the bottom, vertical and groove spaced top edges to obtain the snug fit, and includes a frame, the upper element of which forms a V-shape groove. A metal septum is centrally positioned in the frame with fiberglass pads on each side, within the frame. Options include one half size foam covers with tack boards either directly fabric covered or with a one quarter size foam cover option.

Abstract: Hanging components of the enclosed or open shelf type for an interior space dividing system utilize a disappearing pivoting hook at the upper rear corners and a pivoting mounting bracket or foot at the lower rear corners, the latter being pivoted to two alternative positions depending on the supporting horizontal frame element of the system or elevation at which the component is supported. Such hooks and mounting brackets are for the most part enclosed within the back-to-back face plates of the vertical panels of the components, such panel forming face plates having rounded edges forming a peripheral slot, such slot being enlarged to accommodate the pivoting movement of the disappearing hook and mounting foot. The face plates are readily assembled and disassembled by an internal tongue and slot connection at the front and by fasteners at the rear which extend through collars forming the pivots for the hook and bracket.