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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 4056164 | Stabilized portable seismic signal transducer A seismic signal source apparatus is mounted on the bed of a vehicle by means of a support structure. The apparatus includes a base plate coupled to ground surface beneath the vehicle as well as a seismic signal transducer to inject sweep signals into the... | 11/01/1977 |
| 4051918 | Seismic energy source A seismic energy source which incorporates multiple augers and a rotary mechanism therefor mounted on a vehicle, the auger incorporating an internally situated seismic shock wave source which creates shock waves passing through a window in the auger into ... | 10/04/1977 |
| 4050540 | Movable device for generating acoustic shear waves in the earth Device for generating shear waves in the earth for seismic prospecting, comprising means for striking with a mass a target-member coupled to the earth, said means including means for lifting and shifting said mass with respect to the target member, an ele... | 09/27/1977 |
| 4049077 | Seismic vibrator control system This invention is a control system for a hydraulic vibrator that permits the injection into the ground of seismic signals having pseudo-random code patterns or other broad band signals. Feedback for controlling vibrator operation is taken from the couplin... | 09/20/1977 |
| 4014403 | Vibratory apparatus for use in seismic exploration In a variable frequency seismic vibrator including an earth coupling plate, means for generating a reaction impedance, and an energy source for generating reciprocating movement of the coupling plate relative to the reaction impedance, the reaction impeda... | 03/29/1977 |
| 4011923 | Mobile seismic energy source A mobile seismic energy source is formed by an automotive vehicle equipped with a vibrator type seismic energy source, a lifting mechanism, means for generating fluid pressure, and control means. Frame means pivotably linked to the vehicle chassis are pro... | 03/15/1977 |
| 4011924 | Device for producing mechanical waves A device for generating sound waves for use in shallow terristrial seismology incorporates a percussion mass, a motor for driving the percussion mass to strike the ground for intermittent contact and adjustable to vary the frequency of impact, and a sensi... | 03/15/1977 |
| 4008784 | Seismic signal source A seismic signal source adaptable for use with various types of seismic exploration vehicles which move over land. A signal means forms a seismic signal, and a transfer means transfers the signal to a fluid-filled tire of the vehicle for improved and more... | 02/22/1977 |
| 4006795 | Means for seismic prospecting from bulk liquid carriers Apparatus for conducting seismic reflection surveys from oil tankers or other bulk liquid carriers in the course of their normal journeys. Seismic sources and detector apparatus are mounted in the ballast tanks. Pulse compression techniques may be used, a... | 02/08/1977 |
| 4004651 | Means for flexibly guiding the travel of an upwardly propelled weight Arms extending laterally from an upwardly moving weight, such as a rebounding seismic gas exploder, terminate in guide assemblies adapted to engage a plurality of parallel semi-rigid, resilient ropes connected between the top and the bottom of a supportin... | 01/25/1977 |
| 3999626 | Apparatus and seismic method A seismic generator for communicating from either above or below the surface of the earth is disclosed. The generator includes a system of eccentrically weighted masses such as, for example, unbalanced flywheels, which can be rotated to produce a seismic ... | 12/28/1976 |
| 3995713 | High speed seismic gas exploder and method of operation A gas exploder for injecting seismic signals into the earth is provided with a high speed hydraulic catching apparatus which allows the exploder to rebound essentially unrestrained after it is fired at the surface and replaces it on the ground in one seco... | 12/07/1976 |
| 3983957 | Method and apparatus for creating seismic waves in the earth A mass positioned above the earth and having downward extensions, which may include wheels, resting on the earth. One or more closed chambers having two parts vertically reciprocable with respect to each other, one part pressing on the earth, the other pa... | 10/05/1976 |
| 3968855 | Seismic marine gun assembly The underwater gun assembly of this invention has an acceleration barrel and a firing gun. Percussion-initiatable cartridges are carried to the acceleration barrel by a stream of water. Each cartridge has an outside diameter which is nearly equal to the i... | 07/13/1976 |
| 3952833 | Method and apparatus for generating pressure waves in water by implosion A gas exploder consisting of a rigid cylindrical lower member and a rigid upper member telescoping therein to form a chamber in which a gas explosion can take place is supported beneath the surface of the water from a float by means of low resilience rope... | 04/27/1976 |
| 3951229 | Method and apparatus for imparting a seismic pulse to the earth An apparatus and method for controlling the travel of a vehicle mounted seismic gas exploder adapted to deliver a downwardly directed pulse to the earth and thereafter be driven in an upward direction by the resultant reaction force. The exploder is flexi... | 04/20/1976 |
| 3949831 | Device for generating acoustic waves in a liquid medium A device for generating acoustic waves in a liquid, comprising two hollow enclosures communicating through a narrow passageway, a valve interposed in said passage way for controlling said communication, means for feeding a first one of said enclosures, in... | 04/13/1976 |
| 3937296 | Firing device, explosive charge, method, and system, for seismic exploration A firing device is provided for initiation of delay type seismic charge assemblies, which comprises means for conveying and guiding the charge assemblies, in the seismic test zone, into electrical initiation contact with one of any number of available pai... | 02/10/1976 |
| 3934672 | Method and apparatus for sensing when a seismic gas exploder is in contact with the earth A seismic gas exploder is coupled to the movable piston of a hydraulic catching system so that the piston is constrained to move with the exploder as it rebounds upward from a shot and then falls back to earth. The weight of the gas exploder is applied th... | 01/27/1976 |
| 3934218 | Apparatus and method for seismic exploration New and improved apparatus and method for seismic exploration on land transports sensing geophones with a flat, lightweight, towing medium or sheet which conforms to the earth's surface. The geophones are mounted on sleds attached to the towing medium by ... | 01/20/1976 |
