David J Simm

US Patent:

20210061488, Mar 4, 2021

Filed:

Aug 28, 2020

Appl. No.:

17/006465

Inventors:

- Waltham MA, US
David Alfred Simm - Westfield MA, US
Katherine Conner - Boston MA, US

International Classification:

B64F 3/02
B64B 1/44

Abstract:

A technique for varying buoyancy of an apparatus includes providing a substrate configured to produce gas on demand when exposed to a liquid, exposing the substrate to such liquid, and capturing the gas produced by the substrate to increase the buoyancy of the apparatus within a fluid. In some examples, the liquid and the fluid contain the same material, such that gas may be produced using fluid already in the environment.

US Patent:

20190152736, May 23, 2019

Filed:

Nov 21, 2018

Appl. No.:

16/197932

Inventors:

- Tolland CT, US
Harrison ROBERTS - Willington CT, US
David A. SIMM - Westfield MA, US
Ken SZAREK - Tolland CT, US

International Classification:

B65H 43/08
B65H 35/00

Abstract:

An apparatus and method for determining sheet material edges on a surface including a sensor configured to detect an outer edge and a usable edge of the sheet material and a controller in communication with the sensor. The sensor comprises a first color optical sensor producing a first signal representing a first physical attribute of the sheet material and a second color optical sensor producing a second signal representing a second physical attribute of the sheet material. The controller comprises a processor, a memory, and a communications adapter, controls dispensing and spreading of the sheet material for detection by the sensor, and signals to a user a presence of the usable edge in the sheet material upon detection by the sensor.