Robert G Porter

US Patent:

44481403, May 15, 1984

Filed:

Oct 5, 1982

Appl. No.:

6/432810

Inventors:

Robert E. Porter - Hamilton MA

International Classification:

D05B 2704

US Classification:

112311

Abstract:

A top feed arrangement for cooperation with a lower feed dog of a sewing machine, the lower feed dog cyclically engaging and disengaging the lower surface of material to be sewn in order to move that lower surface along a predetermined path through and past the sewing machine. The top feed arrangement comprises an upper feed dog carried by an arm that is linked to an oscillatory take-off from the primary drive system of the sewing machine. The arm is connected to the device at one end in a pivotal connection and the upper feed dog is carried at the other end of the arm. The arm is resiliently urged in a direction to cause the upper feed dog normally to approach the lower feed dog. A lifter device also responsive to the primary drive system of the sewing machine, periodically moves the upper feed dog in a direction away from the lower feed dog against the resilient force. The linkage from the sewing machine drive to the top feed is housed in a recessed area removed from the work and an uncluttered large work area is provided.

US Patent:

44494645, May 22, 1984

Filed:

Oct 4, 1982

Appl. No.:

6/435281

Inventors:

Robert E. Porter - Hamilton MA

International Classification:

D05B 2706

US Classification:

112311

Abstract:

A walking foot top feed for a sewing machine in which a walking foot is supported on a beam and a presser foot is supported on an arm, an independent beam being connected to both the presser foot arm and to the walking foot beam and a source of power being connected to the independent beam, the independent beam transferring motion from the source to the walking foot beam and to the presser foot arm to cause out-of-phase movement of the walking foot and the presser foot.

US Patent:

45467161, Oct 15, 1985

Filed:

Jul 30, 1984

Appl. No.:

6/635714

Inventors:

Edward Babson - Ipswich MA
Michael R. Porter - Topsfield MA
Robert E. Porter - Hamilton MA

Assignee:

Porter Sewing Machines, Inc. - Beverly MA

International Classification:

D05B 108
D05B 120

US Classification:

112162

Abstract:

In a sewing machine for performing twin overedging and seaming in one high-speed operation, specially designed top and bottom variable feed dogs pull the two plies through a three needle stitching area with improved, simplified elements for diverting one ply edge while the other is being overcast. The upright overcast edge of the top ply passes through a tunnel formed through the top feed dog. A guide wall attached to the throat plate guides the top edge away from the bottom overedging station. A guard wall can be attached to the presser foot to keep the turned-up top edge away from the seaming needle. A fiber optic/pneumatic system controls automatic stop, presser foot/top feed retraction and between-work thread cutter functions. Alternative front edge guides facilitate feeding the two plies in registration.

US Patent:

41763386, Nov 27, 1979

Filed:

Aug 31, 1977

Appl. No.:

5/829344

Inventors:

Robert C. Spindel - North Falmouth MA
Robert P. Porter - West Falmouth MA
William M. Marquet - Falmouth MA

Assignee:

Woods Hole Oceanographic Institution - Woods Hole MA

International Classification:

G01S 518

US Classification:

367 6E

Abstract:

A high resolution underwater acoustic navigation system is provided by a combined pulse and continuous-wave or Doppler system. Locations of the object being tracked are periodically determined by the pulse subsystem and are used to initialize the Doppler subsystem. The Doppler Subsystem tracks the location from the fix obtained by the pulse subsystem. Both subsystems are interfaced with a central processing unit or digital computer and the data rate input to the computer is substantially reduced by the use, in the Doppler subsystem, of a phase angle quadrant change counter whose accumulated count is periodically provided as an input to the computer.

US Patent:

42416817, Dec 30, 1980

Filed:

Jun 21, 1979

Appl. No.:

6/050662

Inventors:

Robert E. Porter - Hamilton MA

International Classification:

D05B 2710
D05B 7500
D05B 6500

US Classification:

112322

Abstract:

Circumferential stitching of a tubular workpiece is assisted by means of a moving support and feed system which includes a rotatable drum of smaller diameter than the workpiece having an upper end surface positioned adjacent to a stitching station with a conventional stitching mechanism. The workpiece is prepared for stitching by pulling it axially onto the drum like a sleeve. The portion of the workpiece to be stitched is then advanced transversely through the stitching station by a puller which engages the top of the workpiece while the drum is rotated synchronously to keep the workpiece from twisting. A portion of the drive system for the stitching mechanism runs through the interior of the rotating drum. A blind cutter next to the stitching station enables the operator to cut excess thread inside the workpiece after stitching simply by moving the workpiece in a certain manner. The apparatus is particularly designed for sewing a series of spaced reinforcing rings on a long flexible tube of fireproof fabric.

US Patent:

41664221, Sep 4, 1979

Filed:

Sep 6, 1978

Appl. No.:

5/939967

Inventors:

Robert E. Porter - Hamilton MA

International Classification:

D05B 2706

US Classification:

112311

Abstract:

A top feeding device for advancing the upper layer of material in synchronism with the lower layer of material being sewn. The top feeding device includes an upper feed dog moving periodically in conjunction with a lower feed dog to grip and advance the materials being sewn along a path related to the stroke of the stitching needle or needles of the sewing machine. Drive for the top feeder is derived from an eccentric cam mounted on the sewing machine main drive shaft, motion being positively transferred to a pivotal upper feed dog arm by means of a lever arm depending from that arm and being a cam-following surface held under adjustable pressure in contact with the eccentric cam. The pivot for the upper feed dog arm is disposed upon an extension of the main lower feed bar which thereby provides horizontal motion to both the upper and lower feed dog arms.

US Patent:

39955710, Dec 7, 1976

Filed:

Jan 7, 1976

Appl. No.:

5/646992

Inventors:

Robert E. Porter - Hamilton MA

International Classification:

D05B 2706

US Classification:

112207

Abstract:

Disclosed is an improved top feed arrangement for cooperation with a conventional lower feed dog of a sewing machine, the lower feed dog cyclically engaging and disengaging the lower surface of material to be sewn in order to move that lower surface along a predetermined path through and past the sewing machine. The top feed arrangement comprises an upper feed dog carried by an arm that is pivotally linked to the drive means causing the cyclical movement of the lower feed dog. The arm is connected to those drive means at one end in a pivotal connection and the upper feed dog is carried at the other end of the arm. Biasing means bear against the arm at a location intermediate the upper feed dog and the pivotal connection to the drive means. A lifter means, responsive to the drive system that actuates the sewing machine needle, periodically moves the upper feed dog in a direction away from the lower feed dog against the force of the biasing means. Preferably, the arm which carries the upper feed dog is guided for movement in a vertical plane by a first bearing surface of the arm engaging a vertical confining surface of the sewing machine frame and a second bearing surface engaging a confining surface of the biasing means.

US Patent:

20200142907, May 7, 2020

Filed:

Jan 2, 2020

Appl. No.:

16/732888

Inventors:

- Shenzhen, CN
David E. Brown - Boston MA, US
Robert Porter - San Carlos CA, US
Adam Korman - Glendale CA, US
Manish Upendran - San Jose CA, US
Kathleen Wilson - San Diego CA, US

International Classification:

G06F 16/27
H04L 29/06
G06F 16/635
G06F 16/638
G06F 16/33
G06F 16/438
G06F 16/9535
G06F 21/10
G06F 21/62
G06Q 10/10
G06Q 20/12
G06Q 30/02
G06Q 30/06
G11B 27/10
G11B 27/34
H04L 12/18
H04L 12/58
H04N 7/173
H04N 21/254
H04N 21/41
H04N 21/414
H04N 21/433
H04N 21/462
H04N 21/4627
H04N 21/472
H04N 21/4788
H04N 21/482
H04N 21/658
H04N 21/81
H04N 21/8355
H04L 29/08

Abstract:

A system that provides for the accessing and playing of media files having differing associated rights such as non-DRM media files, purchased and downloaded media files, subscription download files such as tethered downloads, and subscription streamed DRM files. The system also provides a method and user interface for sharing a media collection among computing devices in communication via a network. The system allows access and playback, from each computing device on a network, of all media files in a media collection, regardless of their associated rights.