초록 ▼

Mass flowmeter comprising a hollow conduit of a heat-conducting material for transporting in a determined flow direction a fluid with a mass flow rate to be measured, a first temperature-sensitive resistor element at a first position in thermal contact with this conduit for supplying heat to said fl

Mass flowmeter comprising a hollow conduit of a heat-conducting material for transporting in a determined flow direction a fluid with a mass flow rate to be measured, a first temperature-sensitive resistor element at a first position in thermal contact with this conduit for supplying heat to said fluid, a temperature sensor and measuring and control means connectable to the resistor element and the temperature sensor, wherein the temperature sensor is provided in thermal contact with the conduit at a second position upstream in relation to said first position, and the measuring and control means are adapted to maintain a constant difference in temperature at said first and second positions.

대표청구항 ▼

Mass flowmeter comprising a hollow conduit of a heat-conducting material for transporting in a determined flow direction a fluid with a mass flow rate to be measured, a first temperature-sensitive resistor element at a first position in thermal contact with this conduit for supplying heat to said fl

Mass flowmeter comprising a hollow conduit of a heat-conducting material for transporting in a determined flow direction a fluid with a mass flow rate to be measured, a first temperature-sensitive resistor element at a first position in thermal contact with this conduit for supplying heat to said fluid, a temperature sensor and measuring and control means connectable to the resistor element and the temperature sensor, wherein the temperature sensor is provided in thermal contact with the conduit at a second position upstream in relation to said first position, and the measuring and control means are adapted to maintain a constant difference in temperature at said first and second positions. in the first housing initiates the change in state of the electrical circuit. 8. The apparatus of claim 6 wherein further relative movement of the first and second housings away from one another after the enlarged end of the piston contacts the stop in the first housing initiates the change in state of the electrical circuit by breaking the series circuit through the movable electrical contact. 9. The apparatus acclaim 6 wherein further relative movement of the first and second housings away from one another after the enlarged end of the piston contacts the stop in the first housing initiates the change in state of a electrical circuit by completing the series electrical circuit through the movable electrical contact. 10. The apparatus of claim 1 further comprising an additional electrical contact for providing a series circuit relationship with the movable contact. 11. An apparatus for sensing lining wear in a disc brake, the apparatus comprising: a rotor disc that is rotatable about an axis of rotation; a mounting bracket adapted for floating attachment of a brake caliper; a brake caliper adapted to receive the lining and adapted for floating attachment to the mounting bracket in a manner providing limited movement of the caliper with respect to the bracket, in a direction parallel to the axis of rotation, as the lining wears away; a first housing adapted for attachment to the mounting bracket, and a second housing adapted for attachment to the caliper, the first and second housings each including a bore, the bores being aligned with respect to one another along a common translational axis; a plunger disposed in the bores and movable along the translational axis within the bores in proportion to lining wear; and means for determining a position of the plunger along the translational axis within the bores. 12. The apparatus of claim 11 wherein the mounting bracket and caliper include means for aligning the bores in the first and second housings respectively along the translational axis. 13. An apparatus for sensing lining wear in a disc brake, the apparatus comprising: a rotor disc that is rotatable about an axis of rotation; a mounting bracket adapted for floating attachment of a brake caliper; a brake caliper adapted to receive the lining and adapted for floating attachment to the mounting bracket in a manner providing limited movement of the caliper with respect to the bracket in a direction parallel to the axis of rotation, as the lining wears away; a first housing adapted for attachment to the mounting bracket and a second housing adapted for attachment to the caliper, the first and second housing each including a bore, the bores being aligned with respect to one another along a common translational axis; the mounting bracket and caliper including means for aligning the bores in the first and second housing respectively along the translational axis a plunger disposed in the bores and movable along the translational axis within the bores in proportion to lining wear; means for determining a position of the plunger along the translational axis within the bores; and sensing means for electrically determining the position of the plunger within the bores and adapted for electrical connection to an external electrical circuit. 14. The apparatus of claim 13 wherein the sensing means further comprise means for initiating a change in electrical state of the electrical circuit indicative of the position of the plunger within the bores. 15. A method for sensing lining wear in a disc brake assembly having a rotor disc that is rotatable about an axis and a brake caliper adapted for floating attachment to a mounting bracket in a manner providing limited axial movement of the caliper with respect to the bracket as the lining wears away, the method comprising determining a relative axial of the caliper from the bracket by: attaching a first housing to the mounting bracket, and attaching a second housing to the c