Charles Mackintosh
Engineering at Oakwood Ave, Los Angeles, CA

3995560, Dec 7, 1976

Aug 12, 1975

5/603951

Charles Mackintosh - Los Angeles CA

B61B 1300

104 1R

In a rail transportation system, a sensor assembly is mountable on a rail vehicle for detecting, during the travel thereof, a rail obstruction which would inhibit continued and uninterrupted travel of the vehicle and for transmitting such detection to the vehicle speed control for regulating the same to thereby avoid a perilous situation. The sensor assembly includes a leashed sensor element which is guidingly propelled forwardly of the vehicle parallel to the rail at a distance required for a comfortable stop depending on vehicle speed. Travel of the sensor element is retarded upon contacting the obstruction thereby causing a reel to which the leash is connected to rewind and accordingly regulate the vehicle speed control to bring the travelling vehicle to a complete and safe stop if necessary.

4000702, Jan 4, 1977

Jul 24, 1975

5/598875

Charles Mackintosh - Los Angeles CA

B61B 1202

104244

A transportation system includes a pair of rails spaced transversely of an elongated track on which flanged support wheels of a vehicle are adapted for travel along the sides, top or bottom of the track. The support wheels are transversely spaced apart by at least one-half the width or one-half the height of the vehicle and are sloped to respectively lie in planes intersecting at the center of gravity of the vehicle. Accordingly, horizontal forces acting on the vehicle during travel around curves produce no stresses on the wheel flanges but increase direct stress on one set of wheels and decrease direct stress on the other set of wheels. In another embodiment, the wheels are designed to tip parallel to the resultant forces acting on the wheels during horizontal force changes acting on the vehicle. Such is effected by the provision of curved bearing surfaces associated with the rails and mounted on the wheel mounts in such a manner that the thrusts of the car supports acting on the bearing elements intersect below the wheel bearing surfaces of the rails.

4162594, Jul 31, 1979

Apr 18, 1978

5/897546

Charles Mackintosh - Los Angeles CA

E04H 312

52 9

A plurality of portable grandstand seating sections forming a grandstand are each provided with central ground-engaging wheels and footings, either of which being retractable and extendable for supporting each section alternately with the wheels and the central footings. A collapsible and extendable rear footing is also provided on each section. The sections are capable of being transported between grandstand and storage locations by towing them on the wheels with the rear footings collapsed. A first of such sections which forms an end section of the grandstand is lifted at the grandstand location and is shifted away from an adjoining section, the wheels are placed in a ground-engaging position, the rear footing is collapsed, the rearward end of the section is lowered relative to the wheels and the section is towed on the wheels while supporting the rearward end. The second and remaining sections are thereafter transported in succession to the storage location. When transporting the sections to the grandstand location, a section is rolled on the wheels while supporting its rearward end with the rear footing collapsed.

4274503, Jun 23, 1981

Sep 24, 1979

6/078096

Charles Mackintosh - Los Angeles CA

B62D 6110

180 23

A wheelchair assembly includes an occupant seat having a central shaft for mounting the seat on an undercarriage for universal tilting movement, for vertical movement along the shaft axis and for rotation about such axis. The undercarriage has a plurality of ground engaging wheels driven together by a driving mechanism which includes a drive motor and steered together by a steering mechanism which includes a steering motor. The steering motor may be operatively connected with both the seat and the wheels for turning them together by operation of a control assembly, or the steering motor may be operatively connected with only the seat or with only the wheels for independent operation. Otherwise, the steering mechanism may couple the seat with the wheels while the steering motor is disconnected so that wheel steering may be operated by a manual turning of the seat. An analyzer assembly compares the direction of travel chosen by the seat occupant to the actual orientation of the wheels and then directs the steering motor to align the wheels to the direction chosen, without turning the chair.

4640469, Feb 3, 1987

Aug 15, 1985

6/766425

Charles Mackintosh - Los Angeles CA

B65H 1600, B65H 1810

242 55

A system for tightly rolling and unrolling a web employed as a ground cover includes the use of unrolling tapes for unrolling the web, and an unpowered gear motor which serves to retard unrolling, rollup tapes and/or the gear motor being employed for rolling up the web together with an elongated flexible and unstretchable tube partially filled with fluid which supports the web and causes it to slip on itself for tightening any web bulges while being rolled up.

4152992, May 8, 1979

Oct 31, 1977

5/847066

Charles Mackintosh - Los Angeles CA

E01B 2506, E01B 2526

104130

A switching arrangement for an elevated track having upper and lower rails includes a pair of first upper and lower switch beams at a switching interruption along the track, the beams being movable from a position of rail alignment with the upper and lower rails to a position shifted toward on another. For switching a rail vehicle to a secondary track, a pair of second upper and lower switch beams are provided at the switching interruption for movement toward and away from one another between a position out of rail alignment with the upper and lower rails to a position into alignment therewith when the first beams are shifted toward one another.

4909000, Mar 20, 1990

Dec 2, 1988

7/279107

Charles Mackintosh - Los Angeles CA

Rollway Grandstand Corporation - Los Angeles CA

E04H 312

52 9

A folding grandstand has at least forward and rearward frame sections hinged together at their adjacent ends by link hinge assemblies recessed below the deck surfaces of the sections, and comprising a pair of crossing link arms hinged at opposite ends to the respective sections.