Celebrity Inventors
Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4297683 | Vandal alarm system for parking meters Vandalism and robbery of parking meters have become big problems. The unauthorized entry into the coin box area or striking of the housing as well as bending the support pipe makes it desirable to apprehend the robbers and/or vandals. Repair of the parkin... | 10/27/1981 |
| 4297677 | Personal ambient sound referenced annunciator A personally worn or portable annunciator device for alerting, warning, training, communicating or diagnostic use for people especially those with hearing impairments. This device which can be activated locally or remotely has as one of its means of gener... | 10/27/1981 |
| 4286331 | Monitoring and signalling system including apparatus for processing and analyzing signals produced by activity monitoring sensors Apparatus for a monitoring and signalling system such as a home health car system includes a first sensor operative to monitor the entry and exit of an individual from a room (such as a bathroom), and other sensors operative to monitor usage of appliances... | 08/25/1981 |
| 4250499 | Sound level detector with program interrupt A sound receiver outputs a signal to a sound level detector and to a notification signal generator. The sound level detector outputs a signal to a first input of a switch, and the notification signal generator outputs a signal to a second input of the swi... | 02/10/1981 |
| 4237455 | Safety device for lifting magnets A safety device for lifting magnet has sensor means responsive to flux produced by the device in the magnetic circuit including the body to be lifted, a transducer responsive to the lifting tension produced by the device together with a signal translation... | 12/02/1980 |
| 4234879 | Plug-type switch A plug-type alarm switch for supervision of handwheel water valves and the like has an enclosure having a key-locked cover and containing, wired in series, a two-connector female receptacle and a normally closed enclosure cover tamper switch. The receptac... | 11/18/1980 |
| 4219804 | Sensor for electromagnetic waves caused by nuclear detonation An electronic sensor is disclosed, having circuits for identifying electromagnetic radiation signals caused by nuclear detonations. Circuits also are provided for discriminating against false indications due to electromagnetic radiation caused by lightnin... | 08/26/1980 |
| 4214238 | Seismic trigger An inverted, compound pendulum, which may be set in motion by a seismic variance, activates a photoelectric switching system. Logic circuitry in electrical contact with the switching system discriminates in a pre-determined manner with respect to the repe... | 07/22/1980 |
| 4207561 | Intruder alarm arrangement for an optical communication system An intelligence modulated optical beam is injected into an optical waveguide through a beam splitter. At the output end of the optical waveguide the optical beam has a portion thereof transmitter through a partial reflector to a detector or receiver with ... | 06/10/1980 |
| 4206829 | Control system for lift trucks or the like A control system for a work-performing vehicle such as a lift truck, front end loader, or the like, including a source of motive power for driving the vehicle, performing work, or the like, and of the type including a sensor having an electrical output pr... | 06/10/1980 |
| 4157541 | Device for detecting cable insulation faults A device for detecting cable insulation faults while laying underground cables. The device is adapted for attachment to the cable reel, having one lead connected to the metal shield of the cable or to selected conductors and the other lead to the metal re... | 06/05/1979 |
| 4143367 | Safety device for limiting the movement of doors and the like on contact with an obstacle A safety device specially suitable for preventing the further movement of power operated parts such as doors of trams or garage doors on contact with an obstacle for example a human being. A resilient member is attached to the edge of the door and is prov... | 03/06/1979 |
| 4124846 | Method and apparatus for providing output indications in response to the presence of an electromagnetic energy receptor A method and apparatus for providing output indications in response to the presence of an electromagnetic energy receptor within a predetermined distance of a glow discharge device the electrodes of which have a voltage applied thereacross at least equal ... | 11/07/1978 |
| 4101887 | Monitored fire protection system An electrical fire protection system including a plurality of extinguishant filled suppressor units activatable by explosive squibs connected in series. In response to the detection of an abnormal condition associated with fires, a control circuit initiat... | 07/18/1978 |
| 4091366 | Sonic monitoring method and apparatus A detector is positioned in each of a plurality of protected zones for converting detected sound into electric signals which are amplified and fed to operatively associated discriminators which generate an alarm signal responsive to the detection of elect... | 05/23/1978 |
| 4087782 | Collision detecting system A collision detecting system having a collision sensor for generating an AC collision signal and a signal processing circuit responsive to the AC signal for discriminating the occurrence of a collision and for generating an output signal when a collision ... | 05/02/1978 |
| 4040044 | Dual line electret transducer An improved low-cost line transducer comprises a pair of electret covered conductors twisted about each other to form longitudinal helices and mechanically coupled to a medium that transmits mechanical forces transversely of the conductors. A change in th... | 08/02/1977 |
| 4038596 | Method and apparatus for authenticating a record medium consisting of applying two different strength magnetizing fields and monitoring the remanent fields Apparatus to examine a magnetic storage layer expected to contain a magnetic watermark includes means to magnetize the layer with a unidirectional field of a selected strength without saturating it and means to detect any distinct region of magnetic reman... | 07/26/1977 |
| 4035165 | Rapper monitor An apparatus and method for monitoring electrode rapper operation in an electrostatic precipitator. The actual movement or impact of the hammer in an electrode rapper is sensed and a control signal is generated and transmitted to a monitor in response the... | 07/12/1977 |
| 4012713 | System for providing an indication of wind shear The output of a transducer providing a signal in accordance with the instantaneous air speed of an aircraft is differentiated and fed to a summing device which subtracts therefrom a signal in accordance with the horizontal acceleration of the aircraft, th... | 03/15/1977 |
| 3996950 | Obstacle detection device for use by the blind A rollable device, designed to be pushed by a blind person, has a plurality of sensors so spaced and so located upon a wheeled mount as to detect the presence of an object, step, or depression in the path of the user, and in so doing actuate electrical me... | 12/14/1976 |
| 3990074 | Kiln alarm activated by kiln shutoff An apparatus activates an alarm for a kiln operator when the heat and temperature provided by a kiln reach a predetermined level thereby activating a kiln shut-off weight and switch. The kiln shut-off weight rotates to engage a rod coupled to a switching ... | 11/02/1976 |
| 3988577 | Automated energy systems with computer compatibility The invention comprises apparatus and methods for controlling and monitoring most of the energy systems used by man. An energy level to be maintained is predetermined and electronically established as a time interval. Sensing means are exposed to the actu... | 10/26/1976 |
| 3980990 | Ferromagnetic currency validator An improved ferromagnetic currency validator which permits hand held operation. Means in the hand held device detect speed of movement across the bill being validated and open a gate of variable length in response thereto to measure proper positioning and... | 09/14/1976 |
| 3949356 | Vehicle systems monitor discriminating between emergency conditions and deferrable maintenance needs Operating parameters of an engine, such as coolant temperature, oil pressure, air filter flow and the like, are continuously monitored by an electrical circuit responsive to sensor switches. The circuit distinguishes between conditions which require immed... | 04/06/1976 |
| 3936822 | Method and apparatus for detecting weapon fire A round detecting method and apparatus are disclosed for automatically detecting the firing of weapons, such as small arms, or the like. Radiant and acoustic energy produced upon occurrence of the firing of the weapon and emanating from the muzzle thereof... | 02/03/1976 |
