David C Welsh

US Patent:

50909118, Feb 25, 1992

Filed:

Feb 7, 1991

Appl. No.:

7/652363

Inventors:

David E. Welsh - Tustin CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 2370

US Classification:

439 79

Abstract:

A connector is described, which has several rows of contacts connected to two rows of leads that engage terminals on a circuit board assembly, which enables a large number of contacts to be located in a connector of moderate cost. A connector insert comprises a wafer device (44, FIG. 3) and multiple leads, the leads having front lead portions (50) connected to multiple rows of contacts (30) on the wafer device, middle lead portions (56) molded into the wafer device, and rearward lead portions (52) lying in two parallel rows for contacting terminals on opposite sides of the circuit board assembly. Each wafer device includes two substantially identical wafers (74, 76, FIG. 6), to allow molding of a single row of leads at a time into a wafer. Each wafer has forwardly projecting towers (130, FIG. 5) that each lie around the front portion of a lead, and each contact has a periphery captured by a tower portion and a hole that receives a lead front portion.

US Patent:

50889427, Feb 18, 1992

Filed:

Jul 15, 1991

Appl. No.:

7/729916

Inventors:

David E. Welsh - Tustin CA
David Rofer - Fountain Valley CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 13187

US Classification:

439843

Abstract:

A high reliability socket contact assembly is provided, of the type that has a seamless exterior, which has tines with closely spaced initial and final points of pin contact engagement, and which has a closed entry region limiting the size of pin contacts that can be inserted, which can be constructed at low cost. The assembly includes a seamless barrel (12, FIG. 3) having a cylindrical cavity (16) extending into its front end, and a clip (20) formed of sheet metal rolled into a tube and lying in the cavity. The clip has a rearward portion (32), tines (42a-42d) extending forwardly from the rearward portion and having free forward tips, and a forward portion. The tips (56) of the tines have radially inner edges (60) lying on a first imaginary circle, and the forward portion of the barrel forms a closed entry region (72) having an inside diameter no greater than the diameter of the first imaginary circle, to prevent entry of pins of a diameter that could damage the tines. In one barrel (FIG. 3 ), the forward barrel portion has a flared front part (80), with the narrowest part of the flare forming the closed end region.

US Patent:

50662503, Nov 19, 1991

Filed:

Dec 21, 1990

Appl. No.:

7/605445

Inventors:

David E. Welsh - Tustin CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 1364

US Classification:

439681

Abstract:

Polarizing keys are provided to allow only selected pairs of connectors to be mated, which allow one connector to be displaced slightly after mating, while also providing a large area of interference between nonmating keys to prevent their connectors from mating. Each key has an elongated keying portion with an interfitting side 94 (Fig. 9) which lies opposite the interfitting side of a similar corresponding key when the connectors are mated. Each interfitting side has forward and rearward parts 120, 122, with the rearward part 122 being indented with respect to the forward part.

US Patent:

50151924, May 14, 1991

Filed:

Nov 13, 1989

Appl. No.:

7/435111

Inventors:

David E. Welsh - Tustin CA
Albert H. Wilson - Los Angeles CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 909

US Classification:

439 83

Abstract:

A method is described for installing contacts with their rear tail ends soldered to holes of a circuit board and their front mating ends insulative housing layers, which facilitates inspection of the solder connections to the circuit board and defluxing of the assembly after soldering. The front contact portions are partially inserted into holes in an elastomeric housing layer (50, FIG. 3) until a first forwardly-facing shoulder (76) on each contact abuts an abutment (92) on the elastomeric layer. The contact rear ends are inserted into corresponding holes in the circuit board (56) until a second rearwardly-facing shoulder on each contact abuts the front face of the board, and the contacts are then soldered to the board. The distance (H, FIG. 2) between the first and second contact shoulders is sufficient to provide a considerable gap (A) between the board and the elastomeric layer, so the solder connectiosn can be visually inspected.

US Patent:

53735730, Dec 13, 1994

Filed:

Jun 21, 1993

Appl. No.:

8/079762

Inventors:

David E. Welsh - Tustin CA

Assignee:

ITT Corporation - Secaucus NJ

International Classification:

G02B 636

US Classification:

385 69

Abstract:

A fiber optic connector is described, which has a retention clip (100, FIG. 4 ) that is part of the terminus so the clip is removed with the terminus from a connector housing, to enable replacement of a broken clip as well as to provide a more compact and low cost connector. The clip has a rear end (102) forming a ring that slides along the terminus body, and has a plurality of tines (104-107) that extend forwardly and radially outwardly. The free forward end of each tine has a rearwardly-facing clip shoulder (112) which abuts a forwardly-facing housing shoulder (114) so the clip cannot be removed in a rearward direction until the tines are deflected together. The front ends of the tines abut the rear end (92) of a spring that lies around the terminus body. The termini of the plug and receptacle connectors are identical except that one of the connectors (14, FIG. 5 ) uses a spacer (140) in place of a helical spring.

US Patent:

50469649, Sep 10, 1991

Filed:

Oct 10, 1989

Appl. No.:

7/419406

Inventors:

David E. Welsh - Tustin CA
Piyapote Pisalyaput - Irvine CA
William C. Gore - San Bernardino CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 1352

US Classification:

439271

Abstract:

An electrical connector system is provided, of the type that includes housings of plastic-metal hybrid construction, which provides good moisture-tight sealing between the plastic shells and metal inserts and around grounding springs. The receptacle connector has a front edge to which the plastic shell and metal insert extend, and the plug connector includes a ring-shaped elastomeric first seal (90, FIG. 3) that is compressed by the front edge of the receptacle shell and insert (96, 98), to not only seal the inside of the mating regions of the connector but also to seal any slight gap (100) between the plastic shell and metal insert of the receptacle. The forward edge of the plug presses against a second elastomeric seal (92) which is on the receptacle, with the first and second seals sealing a region containing a grounding spring (80) that electrically connects the inserts of the plug and receptacle. Threaded connection between the plug and receptacle is through plastic threads (76, 78) on the outside of the receptacle shell and on the inside of the coupling nut on the plug. The system also includes a backshell device (24, FIG.

US Patent:

48121371, Mar 14, 1989

Filed:

Nov 25, 1987

Appl. No.:

7/125273

Inventors:

Albert H. Wilson - Los Angeles CA
David E. Welsh - Tustin CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 900
H01R 13658

US Classification:

439607

Abstract:

A connector is described, which includes a radio interference shield in the shell assembly, and yet which has a shell assembly whose forward portion can fit into a very narrow space. The shell assembly includes a shell (14, FIG. 2), a sheet metal hood (30) extending forwardly from the shell to receive another connector, and a sheet metal shield (34) lying on the inner shide of the hood. The hood has a forward end (46) extending in a short loop, while the shield has a forward end (58) extending in a loop immediately rearward of the hood loop. The shield includes an outer portion (54) extending along the inner surface of the hood, and a resilient inner portion (56) that forms spring fingers (62) that contact the other connector and that have tips (78) that make facewise contact with the outer portion of the shield.

US Patent:

48081183, Feb 28, 1989

Filed:

Nov 25, 1987

Appl. No.:

7/125276

Inventors:

Albert H. Wilson - Los Angeles CA
David E. Welsh - Tustin CA

Assignee:

ITT Corporation - New York NY

International Classification:

H01R 900

US Classification:

439 95

Abstract:

A metal clip is described which retains a modular insert containing an insulator body with contacts thereon, in a shell of a connector, while also providing a ground plane and shield against electromagnetic interference. The clip includes a flat middle portion that extends across most of the width of the connector and a pair of opposite ends bent out of the plane of the middle portion and having edges that abut shoulders formed on the shell and that press against shell surfaces lying adjacent to the shoulders. The flat middle portion lays facewise against a face of the insulator body of the connector to prevent movement of the insulator body and contacts therein. The middle portion of the clip spans most of the area within the shell to provide an electromagnetic shield that is electrically terminated to the shell.