Abstract: A light weight inherently stable and rigid projector stand for multi-axis projection of images onto a common screen by magazine loaded slide projectors, maximizing close proximity of the projection axes, with improved magazine access, and direct support of each projector for pitch axis and roll axis and yaw axis adjustment, the stand being also adjustable for pitch, roll and yaw and unison adjustment of the multiplicity of projection axes.

Abstract: A mechanism for providing precise (microradians) angular adjustment for h resolution adjustable mounts and platforms used to design optical elements. The mechanism includes temperature-controlled rods having internally embedded heater elements and thermistors attached to a stable platform. The heaters and thermistors are attached to a proportional control circuit which accurately and precisely regulates rod temperatures.

Abstract: A worktable, especially an office table, which includes two side legs, at least one support bar which connects these legs, and a table-top. Also provided are rigidly interconnected support, connecting and fastening structures which permit different height positions and inclinations of the table-top with the aid of simple tools. The connecting, support, and fastening structures save space, and give the table the necessary stability and freedom from vibration. For this purpose, the fastening plates have holes which are equally spaced from, and are rotationally symmetrical to, the middle point of the plate. The bars have at least two fastening and support surfaces for the table-top and are eccentrically connected with the fastening plates in such a manner that in different rotary positions of the two plates, the fastening and support surfaces of the bars are located at different levels or height positions. The table legs have threaded holes arranged to correspond with the fastening holes of the plate.

Abstract: An adjustable, split top table for accommodating word processing equipment and the like comprises a base support, a main frame connected to the base support and two independently movable table tops (front and rear) adjustably secured to the main frame. A first lead screw is mounted between the main frame and the front table top so as to slope forward at an acute angle to the vertical. A second lead screw is mounted between the main frame and a front section of the rear table top and parallel to the first lead screw. A third lead screw is pivotally mounted between the main frame and a middle section of the rear table top. Drive means are coupled to the lead screws to independently raise and lower the first table top, raise and lower the rear table top and tilt the rear table top.

Abstract: A drafting table having spring-balanced lifting and tilting movement features is provided with an anti-snap device which prevents the table top from tilting so quickly to the full-vertical position that it hits its stops and rocks the entire table over. The anti-snap device comprises a flexible strap which is wrapped about and fixed to cylindric members on which the table top lifts and tilts. The flexible strap becomes tight as the table top reaches its fully vertical position, but tightening of the strap is resisted by the tilt springs, which are pulled to one side by the strap. Resistance to the tightening of the strap requires more force to tilt the top to its full vertical position, increasingly slowing the tilting movement near the end of tilting travel.

Abstract: A balanced adjustable support in which the plane of the support surface for an object or piece to be machined can be altered with great precision. The adjustable support comprises a table, a base, a central leg rigidly fixed to the base and jointed to the underside of the table, and four corner telescopic legs, the length of which is adjustable by means of a pneumatic jack. Each end of each of the legs is fixed to the base and to the underside of the table with a ball and socket joint immobilized by means of a pneumatic joint.

Abstract: A lift truck hood mechanism and method for operation thereof in which a cover is provided for the truck power source compartment and is movable from a substantially horizontal closed position to a substantially vertical opened position at the rear of the compartment. The rearward end of the cover is raised and guided in a linear path by hand or by rollers operating in tracks in the rear support members of the overhead guard assembly. The cover is pivoted about a transverse axis midway between the forward and rearward ends of the cover, and is moved toward the support members as the one end is raised. Torsion bars may be used to assist in moving the cover and to secure the cover in the open position. The operator's seat has a hinged mounting bracket and is movable between positions over the top of the front of the cover to hold the cover closed and against the steering wheel permitting the cover to be opened. A locking device prevents accidental movement of the rear of the hood.

Abstract: An adjustable table is described having three support structures arranged symmetrically around the perimeter of the table. Each support structure is supported on a base by means of a two dimensional joint, such as a leaf spring, having an axis of rotation tangential to a circle centered at a central point of the table. Each support structure supports the table by means of a three dimensional joint such as a ball in socket joint. Each support structure includes a threaded spindle and a rotatable threaded bolt for adjusting the separation between the table and the base.

Abstract: To allow adjustment of the table top of a table the table top is connected to the subframe of the table by means of a rigid U-shaped member, the branches of which are pivotally connected to the subframe about a horizontal axis, and the intermediate part of which is pivotally connected to the table top about an axis extending parallel with the pivot axis of the branches. A first telescopically extensible rod, the length of which is adjustable from a predetermined initial length which corresponds to the distance between the pivot axis of the branches and the pivot axis of the intermediate part of the U-shaped member, has one end pivotally connected with the frame at a distance from the pivot axis of the branches, and the other end pivotally connected with the table top at a distance from the pivot axis of the intermediate part, which distance corresponds to the distance between one end of the first rod and the pivot axis of the branches.

Abstract: A multi-level drafting table construction including a table base supporting a drafting board, and an arrangement of link members pivotally interconnecting the drafting board and table base. One of the link members, which is pivotally interconnected at one end to the drafting board, has its other end selectively receivable in ratchet teeth provided on the table base for adjusting inclination of the drafting board in multi-level positions of the board. A front link member is pivotally connected at one end to the table base at a first pivot axis which is a common axis for inclination of the drafting board about said axis for inclination of the board in a first range of inclined positions. The front link member is pivotally connected at its other end at a second pivot axis to the drafting board to provide pivotal movement of the drafting board about said pivot axis in a different range of inclined positions and at different levels.

Abstract: An adjustable wooden bench has four legs, the upper portions of which are connected by a pair of horizontal rails provided with vertical openings through which the legs extend. The rails support a seat that is slidable lengthwise of them. A horizontal footrest rail like the top rails is mounted on the lower portions of the front legs. The top front rail is supported by a pair of flexible cables anchored at one end to the front legs above the rail, with the cable extending down through the rail and then lengthwise of the rail in opposite directions in engagement with its bottom and then down to anchors on the other front legs. Normally, the cables are locked against movement lengthwise of the rail to prevent it from moving vertically. The back rail and the footrest may be supported by cables in the same way as the front rails.

Abstract: A drawing table having a stand and a board linked to the stand in such a manner as to allow the board to be adjusted in position whereby the weight of the board creates a second moment about the axis opposing the first moment. A compensating means varies the second moment to compensate for variations in the first moment due to changes in the position of the board so that the board is balanced in any position.