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| Number | Title | Issue Date |
| 6741523 | Microstructured time dependent indicators The invention provides microstructured time dependent indicators including timers, time/temperature indicators, etc. The indicators are preferably highly accurate and easy to read. The invention also includes indicators which are game pieces, calendars, greeting car... | 05/25/2004 |
| 6648505 | Structure for vehicular temperature, air pressure and vacuum meter This invention relates to an improved structure for the vehicular temperature, pressure and vacuum meters with characteristics on that the hand rod is an integrally formed design joined to the dial plate and Bourdon tube without using any bolts or screws,... | 11/18/2003 |
| 5795065 | Temperature-time-pressure detector A temperature-time-pressure detecting device for a closed heat treatment zone consists of a sealed discoidal-shaped capsule of substantially transparent material adapted for placement within the zone in a generally vertical position. The capsule is formed... | 08/18/1998 |
| 5534090 | Dosimeter capsule indicating service life of a rocket motor A novel dosimeter capsule for indicating the condition of the solid propellant contained within a rocket motor to provide a measure of the remaining service life of the motor is described, which comprises a sealed expandable container and a portion of the... | 07/09/1996 |
| 4612872 | Method of operating an expandable chamber with delay valve A method of operating an expandable chamber formed with a valve opening in a wall of the chamber, which permits the surrounding environment, such as high temperature steam, to enter the chamber is used. A temperature responsive delay valve closes the cham... | 09/23/1986 |
| 4277899 | Excavating machine with position indication of its work implement An excavating machine has an indicator (60, 64) showing the position of the boom and dipper stick mounted back hoe (29) to the machine operator. A guide rod (33) is coupled to the hoe and to a swivel joint (34) on the machine to drive the indicator. The a... | 07/14/1981 |
| 4246110 | Compensating device for filter contaminant indicating system A temperature compensating device is disclosed for use in a filter contaminant warning system in a tractor or similar machine. The temperature compensating device is hydraulically connected between the hydraulic filter element inlet and the pressure respo... | 01/20/1981 |
| 4172971 | Magnetic pressure indicator with thermal lockout A magnetic differential pressure indicator is provided for detecting and indicating a pressure differential thereacross that is greater than a predetermined value in a fluid system. A thermal lockout effective even at high internal fluid pressures prevent... | 10/30/1979 |
| 4051728 | Instrument for monitoring physical parameters of temperature and pressure An instrument for monitoring a physical parameter consisting of temperature or pressure, includes an elastic sensor displaceable as a function of the physical parameter being monitored, a belt extending over at least two spaced rollers and coupled to the ... | 10/04/1977 |
| 4003709 | Visual spoilage indicator for food containers A solution for detecting concentrations of CO2 is sealed within a pouch located on or in a food container and visually observable from outside the container. A microporous material places the indicator in gaseous communication with the food con... | 01/18/1977 |
