Otis Elevator Company

United Technologies Corporation

Carrier Corporation

Kidde Fire Protection Limited

Arthur Blanc

Joseph V Mantese

Michael J Birnkrant

Marcin Piech

Peter R Harris

David L Lincoln

John P Wesson

Sergei F Burlatsky

Zbigniew Piech

Vladimir Blasko

James Leo Hubbard

Antonio M Vincitore

Duane C Mccormick

David M Rockwell

Stephen R Nichols

Ramons Andris Reba

Yan Chen

Jose-Rodrigo Castillo-Garza

David R Polak

Charles C Coffin

Christopher T Chipman

Benjamin J Blechman

Mark W Wilson

Daniel G Opoku

Ramons A Reba

Bruce W Horne

A photoacoustic detection system includes a detector that has a chamber, a pulsed light source, piezoelectric tuning forks, and a photosensor. The chamber has an inlet and an outlet for flow of an analyte. The pulsed light source is adjacent the chamber and is operable to emit a light beam along a path through the chamber. The tuning forks are arranged along the path, and each of the tuning forks is operable to emit first sensor signals. The photosensor is arranged along the path and is operable to emit second sensor signals. A controller is connected to receive the first and second sensor signals. The controller is configured to determine whether a target species is present in the analyte based on the first sensor signals and determine whether the target species is present in the analyte based on the second sensor signals.

Photoacoustic detection system with differential amplifier for determing target species presence and triggering fault

A photoacoustic detection system () includes a detector () that has a chamber (), a pulsed light source (), piezoelectric tuning forks (), and a photosensor (). The chamber has an inlet and an outlet for flow of an analyte. The pulsed light source is adjacent the chamber and is operable to emit a light beam along a path through the chamber. The tuning forks are arranged along the path, and each of the tuning forks is operable to emit first sensor signals. The photosensor is arranged along the path and is operable to emit second sensor signals. A controller () is connected to receive the first and second sensor signals. The controller is configured to determine whether a target species is present in the analyte based on the first sensor signals and determine whether the target species is present in the analyte based on the second sensor signals.

Photoacoustic detection system with clocked tuning fork positions

A compressor has a housing assembly having a plurality of ports including a suction port and a discharge A male rotor is mounted for rotation about an axis. A female rotor is enmeshed with the male rotor and mounted in the housing for rotation about an axis for drawing a flow from the suction port, compressing the flow, and discharging the compressed flow through the discharge port. A cavity group is between the discharge port and the male rotor and female rotor. The cavity group has a first member separating a plurality of cells and a foraminate cover member atop the first member.

Screw compressor resonator arrays

The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.

System and method for reducing belt noise

An elevator system may include a stationary support structure defining a hoistway; a car disposed in the hoistway; a linear propulsion assembly for applying a force to the car, the assembly including a first rail engaged to one of the support structure and the car, a plurality of magnets mounted to the first rail, a second rail co-extending with and spaced laterally from the first rail and engaged to the other of the support structure and the car, and a plurality of electric coils mounted to the second rail; and, a damper engaged to at least one of the first and second rails for dissipating vibration.

Vibration damper for elevator linear propulsion system

An acoustic wave generator including a stack having a plurality of first layers configured to receive electrical and/or magnetic energy and a plurality of second layers configured in contact with the plurality of first layers, the plurality of second layers comprising one or more materials configured to change mechanical properties when electrical and/or magnetic energy is applied thereto. The generator further having at least one source configured in operational communication with the plurality of first layers and configured to supply at least one of phased electrical and/or magnetic energy to the plurality of first layers, wherein the stack is configured to (i) generate phased acoustic energy and (ii) at least one of amplify and store the generated phased acoustic energy in a first state and release said generator acoustic energy in a second state.

Coherent acoustic wave generation

An acoustic wave gate is provided. The gate includes one or more layers of metamaterial configured to be in a first state and a second state and configured to change from the first state to the second state when electrical and/or magnetic energy is applied thereto. The gate also includes at least one source configured in operational communication with the one or more layers and configured to supply at least one of electrical and magnetic energy to the one or more layers. The one or more layers are configured to (i) prevent the passage of acoustic energy through the one or more layers when in the first state and (ii) permit the passage of acoustic energy through the one or more layers when in the second state, wherein the one or more layers are configured to be stimulated in phase with the acoustic energy.

Acoustic metamaterial gate

A system for active control of noise and/or vibration includes an electric machine; at least one sensor for sensing at least one of noise and vibration in the machine and generating at least one of an audio signal representing noise and a vibration signal representing vibration; a controller obtaining at least one of the noise signal and the vibration signal, the controller generating control signals to reduce at least one of noise and vibration in the machine; and power electronics receiving the control signals and generating drive signals for the machine.

Method and system for dampening noise or vibration using a motor

An exemplary elevator machine frame includes a plurality of support surfaces configured to support at least one of a motor or a brake. A plurality of arms between the support surfaces maintain a desired alignment of support surfaces. At least one of the arms has a first cross section taken transverse to a longitudinal direction along a length of the arm at a first longitudinal location on the arm. That same arm has a second, different cross section at a second, different longitudinal location on the arm.

Elevator machine frame with noise reducing configuration

Growing community of inventors

Providence, RI, United States of America

Arthur Blanc