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| Number | Title | Issue Date |
| 4278854 | Tilt indicating device A tilt indicating device mountable on a tiltable vehicle or machine component and operable to close an electrical circuit to thereby give an audio/visual warning or initiate levelling action in case of tilt. The device comprises an insulated housing havin... | 07/14/1981 |
| 4276975 | Inclination maintaining system for a discharge chute An inclination maintaining system for a discharge chute of a ready-mix concrete truck or the like including a body on which the chute is pivotally mounted for movement about an axis extending horizontally and transversely of the chute, the system having s... | 07/07/1981 |
| 4275391 | Key controlled, position sensitive, portable alarm A portable alarm device senses movement of the device and actuates an alarm. A pendulum with attached magnet, set in motion by movement of the device, causes closing of alarm circuit reed switches to actuate a continuous alarm. The pendulum may be set by ... | 06/23/1981 |
| 4274077 | Vehicle cover and alarm system therefor A vehicle protective cover and alarm system therefor wherein the cover is of a design and configuration to at least enshroud the major body portion of the vehicle, and wherein at least two sensors are placed in opposed relationship to each of the inside s... | 06/16/1981 |
| 4264899 | Portable alarm for entry detection A portable alarm consists of a unit which emits an alarm signal when it is tilted to a predetermined extent from its upright position, and having a base support which will support the unit in a condition of unstable equilibrium, and a stay which, when the... | 04/28/1981 |
| 4253095 | Alarm apparatus for detecting disturbance or other change of condition A compact portable housing encloses a piezoelectric element which receives short pulses from a pulse generator circuit controlled by a ramping waveform generator circuit so that the element and the adjacent speaker portion of the housing produce a frequen... | 02/24/1981 |
| 4215965 | Apparatus and method for loading a floating vessel with flowable material A water borne barge or other floating vessel is loaded automatically with flowable material from end-to-end with a proper predetermined level of material without dependency on inaccurate human observations. The automatic load-out is terminated with the ve... | 08/05/1980 |
| 4214485 | Electro-mechanical transducer An electro-mechanical transducer is disclosed for measuring physical parameters such as vibration, acceleration or the angular orientation of an object to which it is attached. A closed container partially filled with a fluid, has a light source and light... | 07/29/1980 |
| 4204202 | Security attache case with automatic alarm system An attache case with a built-in alarm circuit does not differ in external appearance from a conventional attache case. It has a handle fastened to the body by two sets of metal studs and two locks. The alarm circuit is controlled by a pair of silicon cont... | 05/20/1980 |
| 4196524 | Head movement indicating device A device adapted to rest on the top of a person's head for indicating head movement from a predetermined position includes a box-like member supporting an indicator assembly which includes a part spherical support plate nested within a part spherical wall... | 04/08/1980 |
| 4189726 | Automatic orientation circuit indicator device for portable power tools and the like A gravity-activated, electric switch rigidly mountable on any type of tool which is to be used in a precisely accurate position respective to a horizontal or vertical plane includes a sealed cylindrical case having an electric contact at each end, a spher... | 02/19/1980 |
| 4167733 | Tamper-proof security alarm system A tamper-proof security alarm system comprising basically a radio transmitter unit to be located at equipment which is to be protected, and a radio receiver unit with alarm and control circuits located at a point remote from the transmitter. The transmitt... | 09/11/1979 |
| 4145682 | Semi-dump truck level indicator A semi-dump level indicator comprising an electrical system including a pair of mercury switches mounted on the rear portion of the trailer. The switches are closed when the trailer is level. When the trailer is dangerously tilted gravity causes one of th... | 03/20/1979 |
| 4135079 | Tank heater alarm A housing containing a buzzer and mercury switch is mounted on the shaft of the drain lever for a heated tank, for example in a dishwasher. If the heating unit is still turned on when the drain valve is opened, the buzzer sounds to warn the operator that ... | 01/16/1979 |
| 4081177 | Break-away outrigger An outrigger arm assembly to prevent a would-be intruder from successfully climbing over a fence. The outrigger arm assembly is mounted on top of the fence. Each hollow fence post is interconnected to a hollow outrigger arm by a replaceable collar which b... | 03/28/1978 |
| 4067446 | Cable stay crane A crane for lifting of objects has a base and a substantially vertical column assembly extending from the base. A cross truss is mounted on the column, and cables are pivotally secured to the truss and fixed to the top of the column. Movably mounted on on... | 01/10/1978 |
| 4055839 | Foaling alarm A foaling alarm adapted to be positioned around the withers and belly of a mare just behind the forearms and having, in the region of the withers, an RF transmitter, and a position sensing switch which energizes the transmitter when the mare lies down on ... | 10/25/1977 |
| 4023157 | Theft alarm for portable articles A theft alarm for portable articles includes a pocket-sized housing from which extend a pair of opposed, pivotting jaws. One of the jaws is secured to an extendable ratchet shaft disposed within the housing. A cam rotated by a key lock device actuates a p... | 05/10/1977 |
| 4009464 | Apparatus for indicating attitude failure Apparatus for indicating attitude failure in an attitude indicator system in which energy is stored and isolated from all other apparatus during normal operation and transferred to the attitude indicator when attitude failure is detected, resulting in an ... | 02/22/1977 |
| 3999178 | Orientation responsive alarm system Disclosed is a boat alarm system including a sensor that provides a sensor output in response to a predetermined change in its orientation, a timer for providing an alarm signal in response to a one-quarter to one second period of uninterrupted sensor out... | 12/21/1976 |
| 3987906 | Apparatus for preventing the tilting of telescopic jib cranes Apparatus for preventing the tilting of a telescopic jib crane wherein a hydraulic cylinder is provided for raising the jib. The apparatus includes switches for monitoring the cylinder pressure and the elevation of telescopic position of the jib. Preselec... | 10/26/1976 |
| 3988724 | Theft alarm A theft alarm system which includes a transmitter and a receiver which may be fastened together during non-use, with the transmitter being secured to the equipment being protected. Removal of the receiver energizes both the transmitter and receiver. Subse... | 10/26/1976 |
| 3971006 | Multi directional motion and vibration triggering device A motion detector and unique switch forming a part thereof in which the switch includes a glass housing with a spherically shaped, concave surface in which a pool of mercury rests and a pair of separated annular contacts extending in parallel planes above... | 07/20/1976 |
