Abstract: A stepless positioning structure for a telescopic tube includes a spindle, a spring, an elastic sleeve, a ball socket, and a plurality of balls. The elastic sleeve has a first central through hole, an inner end fixed to an inner end of an inner tube, and an outer end provided with an engaging section. The engaging section has a reduced portion at an outer end thereof. The ball socket is disposed in an outer tube, and has a second central through hole and a plurality of chambers formed on a side wall thereof. The chambers interconnect with the second central through hole of the ball socket. Either of upper and lower ends of each chamber is formed with a curve surface. The balls are accommodated in the chambers of the ball socket. The spindle is inserted through the spring, the first central through hole of the elastic sleeve, and the second central through hole of the ball socket. The spring holds against an inner end of the spindle and the elastic sleeve, respectively.
Abstract: A machine for inserting DIP components either into a circuit board or into sockets on the circuit board having two alternate heights. The insetion machine can be advanced a given distance by a fixed stroke cylinder, and the upper location of this stroke can be matched to the upper surface of the circuit board or to the top surface of either of the sockets by a cam which can be displaced horizontally to three distant locations.
Abstract: An indexing mechanism for a three-dimensional transfer press system wherein a pair of parallel spaced transfer bars are moved back and forth, up and down, and toward and away from each other for transporting successive panels through a series of press stations. A height adjustment for the transfer bars are connected between a lift cam mechanism and a rack-and-pinion linkage, the latter linking the former to two pairs of lift carriers carrying the transfer bars so as to allow their longitudinal reciprocation and movement toward and away from each other. Comprising either a multiple abutment member, a screw-and-nut assembly, or a double-acting hydraulic cylinder, the height adjustment provdes a variable length of connection between the lift cam mechanism and the rack-and-pinion linkage for adjustably varying the upper and lower limits between which the transfer bars are moved up and down.
Abstract: A dynamically variable oscillating adjustment assembly including a frame and a first link means pivotally connected at one end to the frame and an adjustment mechanism positioned intermediate the one end of the first link means and the frame to adjustably position the first link means with respect to the frame. A second link means pivotally connected at one end to the other end of the first link means and pivotally connected at the other end to a first arm of a bell crank pivotally mounted upon the frame. A second arm of the bell crank is operable to oscillate in response to oscillation of the other end of the first link means. An adjustment mechanism may be interposed between the frame and the intermediate pivot of the bell crank such that the position and stroke of the other arm of the bell crank may be selectively adjusted.
Abstract: An arrangement for use in a conveying and filling device where a conveyor is provided which travels along a linear path in a selected direction to carry articles, for example, recepticles to be filled. A dispensing device is carried by a mounting arm located in spaced relation from the conveyor and is carried by crank means to travel in an orbital path where the orbit carries the mounting arm in the direction of movement of the conveyor for the first portion of the orbit at the termination of which the orbital path returns the mounting arm to a second position relative to the conveyor for a second cycle over the conveyor, including a height adjusting arrangement to adjust the clearance between the mounting arm and the conveyor.
Abstract: A reciprocator is provided with fixed pulleys and movable pulleys which are reciprocated upward and downward, and a slider for mounting a paint gun is connected to an end of a wire which is led through the fixed pulleys and the movable pulleys.
Abstract: A vacuum system for operating a member, such as a signature gripper of a collator which must be actuated and released at regular intervals, conventionally has a slide-type valve which is constantly reciprocated by a cam-operated pushrod between an open position to connect the member to vacuum and a closed position to isolate the member from vacuum. To selectively disable and enable the gripper for selective feed of signatures, an air cylinder and piston unit is used as part of the pushrod so the length of the pushrod may be changed by retracting or extending the air cylinder piston. When the piston is retracted the valve is reciprocated between an open and a normal closed position; while extension of the piston causes the valve to be reciprocated between the normal closed position and a second closed position.