John P Grady

US Patent:

6789941, Sep 14, 2004

Filed:

May 24, 2002

Appl. No.:

10/155539

Inventors:

John K. Grady - Ayer MA 01432

International Classification:

H05G 102

US Classification:

378197, 378196

Abstract:

A dual C-arm angiographic device for flat panel x-ray receptor (âdual C-arm gantryâ) comprises: a base attached to the floor; an outer C-shaped track non-movably attached to the base; a crawler carriage that moves along the outer track; and a counterweighted, inner C-shaped instrument bracket (âinner C-armâ) pivotally attached to the crawler carriage. A detector/counterweight housing, flat-panel x-ray receptor, and x-ray tube and collimator are attached to the inner C-arm. The bottom end of the outer track terminates at the base, such that the outer track arches over the side and top of a separate patient support table. Additionally, the outer track, crawler carriage, and inner C-arm are mutually configured such that the dual C-arm gantry is capable of full spherical angulation and of providing a full range of clinical positioning, while minimizing interference with clinical use patterns (i. e. , the head end of the table is left clear for all angulations).

US Patent:

6979779, Dec 27, 2005

Filed:

Aug 27, 2004

Appl. No.:

10/928350

Inventors:

John K. Grady - Harvard MA, US

International Classification:

H02G003/08

US Classification:

174 50, 174 58, 174 63, 248906, 439535

Abstract:

A rapid mounting, “square” electrical outlet or junction box (4″ square, 4 11/16″ square, 2-gang, etc. ) includes a back plate and four upstanding sidewalls attached to the back plate and defining a front opening. One or more of the sidewalls has a number of conduit knockouts, as well as a plurality of cable access ports, which allow entry of AC, MC, NM, or other cables. The sidewalls also have a mounting hole pattern for rapidly mounting the outlet box, by way of any of the sidewalls, to a wood or metal stud. Accordingly, regardless of the box's orientation, conduit and/or electrical cables can always be routed to the box, and conduits that approach the box from any direction can be easily accommodated without bending or rerouting. Among other things, the outlet box may also be provided with external cable clamps, fold-out depth tangs, device connection flanges, and pre-attached ground leads.

US Patent:

7135686, Nov 14, 2006

Filed:

Nov 19, 2003

Appl. No.:

10/718385

Inventors:

John K. Grady - Ayer MA, US

International Classification:

G01T 1/20

US Classification:

25037011, 25039011

Abstract:

A flat-panel, quantum-limited x-ray imager for fluoroscopy is configured for converting very low levels of x-rays into electrical signals suitable for standard processing by a computer into real-time images, and comprises a screen for converting x-rays into visible light, a very fast demagnification lens system/array positioned behind the screen and configured to provide quantum-limited performance, and an array of CCD image sensors optically coupled, via the lens system, to the screen. The CCD sensors have a high signal-to-noise ratio and an onboard CCD amplification mechanism in the form of an extended section of “gain” register between the normal serial register and the final detection node or output amplifier. The sensors' sequential, internal electrodes are controlled by way of a clocking scheme that produces a slight and well-controlled avalanche multiplication (a slight gain) at each stage in the gain register.

US Patent:

7300205, Nov 27, 2007

Filed:

Nov 27, 2006

Appl. No.:

11/563260

Inventors:

John K. Grady - Harvard MA, US

International Classification:

H05G 1/06

US Classification:

378198, 378197

Abstract:

An “Angio Capable Portable X-Ray Fluoroscopy Unit with Sliding C-Arm and Variable Pivot Point” is disclosed. It is a new Portable C-Arm x-ray system for fluoroscopy (e. g. , angio fluoroscopy) that permits head-to-foot, or cranio-caudal, angulation without appreciable degradation or rotation of the recorded image in the segment of possible views most desired to be used for cardiac angiography, generally between a vertical beam and 60 degrees to the patient's left side from vertical. Applicant's preferred embodiment comprises an portable x-ray device of the type having a C-arm which “slides” through a fixed C-slider housing or sleeve mounted onto a portable base, wherein: the C-slider housing is mounted onto the portable base through a rotatable tilt bearing, and the rotation axis of the bearing and fixed sleeve can be repositioned, within an arcuate slot in the base, from approximately horizontal, when the x-ray beam is vertical, to between approximately 60 degrees and 40 degrees below horizontal in a vertical plane.

US Patent:

7553080, Jun 30, 2009

Filed:

Feb 7, 2007

Appl. No.:

11/672083

Inventors:

John K. Grady - Harvard MA, US

International Classification:

H05G 1/06

US Classification:

378194, 378121

Abstract:

An improved rotating anode x-ray tube housing is disclosed. In the preferred embodiment: a single cable, insulated with Ethylene-Propylene Rubber (“EPR”), has an extended Federal Standard terminal or plug mounted within an extended Federal Standard receptacle, attached to an anode end of the housing; the cable is designed to carry up to approximately 150 kV to power the cathode; and insulation of the plug also insulates the 150 kV from a grounded center portion of the x-ray tube and the anode disk area. The longitudinal axes of the anode and high-voltage plug are parallel to one another. This new configuration allows the cathode plug and receptacle to be moved virtually entirely inside the housing. This results in absolute minimal size of the assembly, and a single cable that exits parallel to the rotational axis of the housing.

US Patent:

8286617, Oct 16, 2012

Filed:

Dec 23, 2010

Appl. No.:

12/977455

Inventors:

John K. Grady - Harvard MA, US

International Classification:

F02P 3/045

US Classification:

123605, 123609, 123618, 123622

Abstract:

Applicant has disclosed an improved dual cycle ignition system for automobiles. In the preferred embodiment, the improved ignition system comprises at least two secondary ignition coils wired in a high voltage “OR” configuration using a single high voltage circuit through a distributor, or alternatively a single plug operated directly from diodes connected respectively to associated secondary coils. The ignition coils are set up to alternate sparks, so that even at 8000 engine RPM, each coil is firing as if operating at 4000 RPM, a speed where conventional highly optimized and inexpensive coils are very effective and can reach their full output.

US Patent:

8427080, Apr 23, 2013

Filed:

Mar 28, 2011

Appl. No.:

13/072882

Inventors:

John K. Grady - Harvard MA, US

International Classification:

H05B 37/02

US Classification:

315360, 315308

Abstract:

Applicant has disclosed a method for controlling on and off times for streetlights by synchronizing these intervals to recent local daylight conditions without any human intervention. The preferred method comprises: sensing, via a photocell, when dusk and dawn occurs; and then, timing or counting the dusk and dawn times per 24-hour cycle, recording that dusk and dawn data, calculating the average dusk-to-dawn interval for a plurality of preceding 24-hour cycles; predicting, the next dusk time; and turning on the streetlight for a preselected percentage of the calculated average dusk-to-dawn interval. Future “on” time periods are repeatedly calculated as a percentage of the dark periods determined on one or several immediately prior nights, and so varies with the seasons. Unlike the prior art, Applicant's streetlight control does not require field programming or field inputs from the installer or time knowledge. It also does not require any external or internal precision clock or calendar.

US Patent:

20090160255, Jun 25, 2009

Filed:

Dec 20, 2007

Appl. No.:

11/960916

Inventors:

John K. Grady - Harvard MA, US

International Classification:

H02J 9/06

US Classification:

307 66

Abstract:

An external uninterruptible power supply (“UPS”), and a related method, are presented in which a predetermined desired DC voltage potential is applied directly to the internal DC voltage power distribution bus in a computer. The UPS is configured to use an automotive battery to provide the predetermined desired DC voltage potential in the event of the loss of the AC voltage input signal. In a preferred embodiment, the UPS includes an inverterless AC-DC power supply, such as a bridge rectifier circuit, for supplying a predetermined desired direct current voltage potential at its output. That output potential in turn is carried by a suitably arranged cord or power cable connected to the internal direct current voltage distribution bus in the computer. The distribution bus may be connected to one or more points-of-load, also known as “point-of-power” voltage conversion modules, each of which provide a regulated voltage to power the various high density chip loads, components and circuitry in the computer. The input voltage to a point-of-load power chip can vary over a wide range allowing unregulated voltages ranging from 11 to 14 volts which may be used to supply the point-of-load power chips with no operating problems since the chips are inherently an on-card switching regulator operating at a high frequency.