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VA, Inc. Patents
Assignee:
VA, Inc.
Address:
Rochester, NY
No. of patents:
11
Patents:












Patent Number Title Of Patent Date Issued
8128296 Shutter assembly March 6, 2012
A shutter assembly includes a plurality of shutter blades movable between an open position and a closed position, a drive ring having first and second oppositely-facing sides, at least one of the shutter blades being movably coupled to the first side, and a first permanent magnet coupled
7883280 Shutter activation system February 8, 2011
A shutter includes at least one shutter blade, a magnet moveably connected to the at least one shutter blade, and a solenoid defining a gap between a first pole and a second pole. The solenoid is configured to controllably draw the magnet into the gap in a first state and to controll
7845865 Non contact shutter activation system and method December 7, 2010
A method of controlling a plurality of shutter blades activated by a solenoid to move the plurality of shutter blades between an open position and a closed position includes reducing an electrical signal applied to the solenoid while the plurality of shutter blades is in transit between
7614806 Damping system for mechanical shutter November 10, 2009
A damping system for an electromagnetically operable rotary shutter includes a damper for arresting the motion of a pivotally supported shutter actuating drive arm. The damper has a first portion composed of an ultrahigh density polyethylene and a second portion composed of a damped
7513702 Non-contact shutter activation system and method April 7, 2009
A shutter operating system is provided that depends on electromagnetic energy to operate shutter blades. A permanent magnet and solenoid system operate the shutter blades. Movement of the magnet causes the shutter blades to move between an open and a closed position over a lens. The
7367721 Bi-stable mechanical photographic shutter May 6, 2008
An electromagnetically operable rotary shutter is rendered bi-stable by the use of two linear electric motors, one to open the shutter and a second to close the shutter together with a latch that holds the shutter in either an open or a closed position in the absence of power to purp
7334950 Quick-change shutter assembly February 26, 2008
A shutter assembly for an optical system includes a shutter housing that maintains optical alignments with adjoining parts of the optical system and a shutter mechanism that can be removed and replaced within the shutter housing without disturbing the optical alignments between the s
6652165 Damping system for mechanical shutter November 25, 2003
A damping system for an electromagnetically operable shutter includes a detent for arresting the motion of a pivotally supported shutter actuating drive arm. The detent has damper portions that are fixed to the pivotally supported drive arm and bumper portions that are fixed t positions
4884160 Constant current actuator for inductive load November 28, 1989
An actuator circuit for an inductive load includes a first low impedence source of direct current at a relatively high voltage, a second low impedance source at a lower voltage, a switching arrangement responsive to an input signal for connecting a load across the first source at the
4697221 Portable actuator for inductive load September 29, 1987
A battery operated, portable actuator for an inductive load such as an electromagnetically actuatable photographic shutter includes an initiating capacitor for initiating acutation of the load, and a continuing holding circuit portion for continuing energizing the load after discharge of
4513345 Control circuit for inductive load April 23, 1985
A control circuit for an inductive load comprising a relatively large capacitor, means for charging it through an SCR, and means for discharging it through the inductive load for energizing the load and simultaneously inhibiting the SCR so long as the discharge path for the capacitor rem

 
 
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