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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7210345 | Forced harmonic vibration master gear A forced harmonic vibration master gear for use in a device for detecting imperfections in a production gear includes a gear body having a plurality of gear teeth. Each of the plurality of gear teeth has a graduation of material added thereto extending from a form d... | 05/01/2007 |
| 5609058 | Method of determining backlash A method of determining backlash wherein one member of a gearset is rotated in a first direction and rotary positions are recorded at predetermined increments. The rotary positions of the other member of the gearset are recorded simultaneously with those ... | 03/11/1997 |
| 5513442 | Apparatus for inspecting a gear A master gear for measuring, in a parallel axis gear measuring apparatus, tooth profile, tooth pitch, and tooth thickness of a work gear. The master gear has a plurality of adjacent teeth separated by a tooth spacing that varies as a repeatable sequence o... | 05/07/1996 |
| 5231875 | Method and apparatus for evaluating gear motion characteristics, based on tooth profile deflection differentiated by rotation angle of the gear A method of evaluating motion characteristics of a workpiece gear, wherein the amount of tooth profile deflection of the workpiece gear in a direction substantially perpendicular to a surface of each tooth of the gear is obtained in relation to an angle o... | 08/03/1993 |
| 4841644 | Method and system of testing gear teeth of circular spacing of gear teeth of a gear wheel With the gear wheel (23) stopped, a testing head (13) is sequentially introduced into tooth gaps to measure adjacent teeth (FIG. 1a), sequentially, by sensing and recording the position of engagement of the measuring head with tooth flanks at a predetermi... | 06/27/1989 |
| 4790074 | Apparatus for testing rack teeth An apparatus tests rack teeth of a rack member for a rack and pinion vehicle steering gear. The apparatus comprises a support for mounting the rack member for longitudinal displacement and a helically toothed test pinion member having an axis. A carriage ... | 12/13/1988 |
| 4715128 | Curvature probe and method Probe and method for determining the curvature of an elongated opening such as a borehole in the earth. The probe includes an axially extending flexible shaft and two pairs of sensing wires arranged in quadrature about the shaft for axial movement relativ... | 12/29/1987 |
| 4704799 | Master gear error compensation A method is provided for compensating for master gear error in a gear checking apparatus employing a preselected master gear and a fixture for mounting a test gear to be checked in mesh with the master gear. The method comprises mounting a test gear in me... | 11/10/1987 |
| 4534007 | Displacement detecting system in a multi-axis measuring system, especially for use with a gear wheel grinding or inspecting machine A displacement detector especially intended for a gear wheel grinding or inspecting machine contains a conventional pre-stage comprising a forward-backward counter receiving measuring pulses, a buffer or intermediate store for preserving the counter state... | 08/06/1985 |
| 4488359 | Automatic gear checking structure and method Structure for and a method of automatically gaging gears including structure for and the method of rotating a master gear and a work gear in tight mesh for a single revolution of the work gear sensing parameters of the gears in tight mesh including the an... | 12/18/1984 |
| 4321753 | Electronic gear checker A functional gear checking machine for determining a number of gear characteristics from a composite input signal received from a linear voltage differential transformer is disclosed. The signal from the sensing transformer is coupled to a demodulation ci... | 03/30/1982 |
| 4272891 | Electronic gear checker A functional gear checking machine for determining a number of gear characteristics from a composite input signal received from a linear voltage differential transformer is disclosed. The signal from the sensing transformer is coupled to a demodulation ci... | 06/16/1981 |
