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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 4887948 | Deformable washer, particularly for predetermining the minimum force needed for tightening a nut or a screw Deformable washer, particularly for predetermining the force needed for tightening a nut mounted on a screw or a screw cooperating with a tapped hole. The washer is provided on one of its faces, preferably the face which is meant to rest against one of th... | 12/19/1989 |
| 4773272 | Apparatus and method for measuring bolt tension in situ An apparatus and method for measuring bolt tension in situ is disclosed. In one embodiment, a tab (12) is disposed in a radial groove (42) in a washer (10) with the proximal end (46) of the tab (12) secured in the groove (42). When the washer (10) is inco... | 09/27/1988 |
| 4732517 | Anti-tamper fastener shielding apparatus Apparatus for assembly with a bolt or screw upon installation thereof to prevent tampering therewith, including a one piece collar device having an outer annular jacket member with a restricted collar portion and an inner annular washer member detachably ... | 03/22/1988 |
| 4556350 | Mine roof anchor bolt This specification describes a new anchor or rock nut which is used in association with an anchor bolt to rupture packages of two or more component setting mixtures. The nut is characterized by having a plug of thermosetting resinous material formed in si... | 12/03/1985 |
| 4483648 | Bolt tension indicating means Improved flat annular washer for indicating tension on associated high tensile strength bolt. Washer bears against either bolt head or nut of given radius. Washer includes means for indicating stress on washer which visibly moves when stress on washer, wh... | 11/20/1984 |
| 4479666 | Load-line fastener A fastening assembly includes: (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to be interconnected, and (b) structure extending at the side of the f... | 10/30/1984 |
| 4408925 | Cable tension meter A turnbuckle assembly has a self-contained tension pre-load indicator utilizing internally mounted compact conical spring washers (belleville washers) and a radially projecting movable stem which is rendered immovable when the washers are fully compressed... | 10/11/1983 |
| 4333220 | Method and apparatus for tightening an assembly including a pre-load indicating fastener A method and apparatus for tightening an assembly including a pre-load indicating fastener is disclosed. Pre-load indicating fasteners are generally tightened until a crushable element, forming a portion of the pre-load indicating fastener, is plastically... | 06/08/1982 |
| 4310181 | Load-line fastener A fastening assembly includes: (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to be interconnected, and (b) structure extending at the side of the f... | 01/12/1982 |
| 4303001 | Bolt tension indicating means Improved flat annular washer for indicating tension on associated high tensile strength bolt. Washer bears against either bolt head or nut of given radius. Washer includes means for indicating stress on washer which visibly moves when stress on washer, wh... | 12/01/1981 |
| 4289061 | Device and assembly for mounting parts An improved assembly for mounting a part onto a base member is provided by incorporating a tubular insert having a hollow inner core in a mounting hole in the part. A fastener, such as a bolt, machine screw or rivet may then be inserted through the insert... | 09/15/1981 |
| 4164164 | Bolt tension indicating means Improved flat annular washer for indicating tension on associated high tensile strength bolt. Washer bears against either bolt head or nut of given radius. Washer includes means for indicating stress on washer which means is located a distance from center... | 08/14/1979 |
| 4131050 | Visual load indicator A load indicator is disclosed which has a spring washer portion and two levers. As the washer portion is deflected under compression, the levers deflect and amplify the deflection of different sections of the washer portion. The levers are mounted such th... | 12/26/1978 |
| 4072081 | Tension indicating washer unit A multipiece, preassembled washer unit incorporating an upper washer and a lower conical washer with a ring gauge interposed between the outer marginal surfaces of the washers so that the gauge is clamped between the superimposed washers upon compression ... | 02/07/1978 |
| 4064785 | Threaded connections A break-out washer assembly for facilitating undoing a connection between interengaged complementally threaded elements. The assembly comprises a washer which tapers radially inwardly and is made of a ductile material and a pair of annuli which straddle t... | 12/27/1977 |
| 4061073 | Controllably deformable fastener assembly A controllably deformable fastener assembly has a fastener, clamping means, and a crushable element. The fastener has a threaded shank portion, a head portion and a shoulder portion on the head portion. The shank portion is of a material having a preselec... | 12/06/1977 |
| 4050771 | Threaded terminal assembly for dynamoelectric machine An automotive alternator end frame includes a slotted portion to which a threaded terminal is to be attached. A square shanked bolt is inserted into an insulating grommet comprising spaced washer members supported by a central sleeve of square cross secti... | 09/27/1977 |
| 4020734 | Tension indicator for fastener means A tension indicator for use with fasteners such as a cooperating nut and bolt. The tension indicator comprises a pair of washers for placing on the shank of the bolt between the bolthead or nut and the workpiece that is to be secured by the fastener. Each... | 05/03/1977 |
| 3948141 | Load indicating washer A load-indicating washer for use in joining two different elements which is capable of visually indicating the tightening force applied against a locking bolt and nut through the indication of encapsulated fluid released under the tightening load. The enc... | 04/06/1976 |
