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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 |
| 7600437 | Devices for measuring strings of a racket and ball quality In some embodiments, devices for measuring strings of a racket include a housing and a button. The devices also include a setting device that determines the frame size of the racket in response to the button being depressed and a spring system that adjusts pre-tensi... | 10/13/2009 |
| 7360264 | Patient immobilization device with diagnostic capabilities A patient immobilization device for immobilizing a patient and performing a diagnostic evaluation of such patient is comprised of a backboard, a structure configured to support the head of a patient on the backboard, and a pupil-sizing indicator positioned on a surf... | 04/22/2008 |
| 7313975 | Apparatus and method for measuring tension in guy wires An apparatus for measuring tension in guy wire systems wherein the lower end of the guy wire has a thimble adjoined by a connection pin to a yoke or clevis of a turnbuckle shackle bolt connected to an earth anchor. A block assembly is removably received beneath the ... | 01/01/2008 |
| 7089802 | Method and apparatus for determining hydrogen embrittlement A method and apparatus for determining failure of a test component. The apparatus, according to a selected method, is able to determine the embrittlement potential of a selected procedure for a selected material. The apparatus is able to determine the embrittlement ... | 08/15/2006 |
| 6918306 | Adjustable flexure loading apparatus for testing long span beams An adjustable loading apparatus for supporting a long span beam in a flexure test by a load application device is disclosed. The apparatus includes an upper support structure including an elongated support beam, at least one support bracket adjustably mountable alon... | 07/19/2005 |
| 5481926 | Tension tester of tennis racquet string A tensiometer for measuring the tension in the individual strings of a tennis racquet featuring a pair of rods which stradle the string to be tested, the rods extending from a base, a lever disk rotably mounted on the base and coupled by a spring to the b... | 01/09/1996 |
| 5133217 | Tensiometer A tensiometer for measuring the tension of a racquet string employs a spring biased plunger which is articulated to a pivoted indicator arm. The racquet string being tested is supported on spaced legs and engaged by the plunger. The tension is indicated o... | 07/28/1992 |
| 5048352 | Racquet string tension measuring device A measuring device for measuring the degree of tension of stringing in a racquet for tennis, squash etc. where string deflecting force and string deflection in response to the force are measured. The useful or real efficiency of a specific racquet can the... | 09/17/1991 |
| 4876900 | Racket string tension tester An improved tennis racket string tension tester of enhanced accuracy and convenient adaptability to rackets of varying configuration and string spacing. To provide for strings of varying diameter and grid spacing, a series of interchangeable washers are p... | 10/31/1989 |
| 4846002 | Racket-stringing tester A device for testing the stringing tension of a racket is made up of two components. The first component has a racket support surface with a recess therein. The second component is a cylinder containing a spring in compression with a slot in the cylinder ... | 07/11/1989 |
| 4794805 | Tennis racket string tension tester A device for testing string tension in the stringing of a tennis racket of simplified construction as compared to prior art devices. The device comprises only five component parts, and occupies a minimum amount of storage space when not in use. Provision ... | 01/03/1989 |
| 4747314 | Racket tester A racket tester includes a flat plate, a support, a knob attached with a screw rod, an pneumatic cylinder including a piston and a pressure gauge, a base, a ring, an indicia marking, a round rod, a stand, and a weighing unit. By properly associating the a... | 05/31/1988 |
| 4590808 | Method and apparatus for determining tension and pressure A device and method for determining a tension factor in grids such as tennis rackets and the like, which have different sized string areas, the device including a frame structure defining a fixed, predetermined test area within a larger size racket string... | 05/27/1986 |
| 4488444 | Testing device for tennis racquets Apparatus and process for separately measuring tension of strings, stiffness of frame in both strung and unstrung condition, and point of balance of a tennis racquet.... | 12/18/1984 |
| 4116054 | Apparatus for measuring the combined resistance to displacement of strings affixed in a racket head Apparatus for measuring the spring rate of the total string plane of a racket. A frame is provided for positioning the racket head. The frame supports a member which is movable towards the strings in a direction normal to its plane. A measuring device is ... | 09/26/1978 |
| 4103546 | Tennis racquet string tension gauge An inexpensive, accurate and portable gauge is disclosed for measuring the tension in the strings of a tennis racquet after it has been strung. The gauge includes a rigid frame supported across the head and an upper spring housing affixed to the frame and... | 08/01/1978 |
| 4077256 | Stringed racket face tension measuring device A rounded abutment member is mounted for reciprocative sliding movement in the normal direction with respect to the center of the face of a stringed racket, and hydraulic means is provided for automatically measuring the pressure required for the movement... | 03/07/1978 |
| 4055999 | Tension tester for tennis racket strings A device for determining the string tension in the netting of a racket has a base and clamping structure adapted to be intercoupled on opposite faces of the netting, and a compressible, spring-loaded plunger slidably mounted on the base for shifting movem... | 11/01/1977 |
