Clayton K Larson

US Patent:

42224608, Sep 16, 1980

Filed:

May 14, 1979

Appl. No.:

6/038899

Inventors:

Clayton E. Larson - Brooklyn NY

Assignee:

White Metal Rolling and Stamping Corp. - Brooklyn NY

International Classification:

E06C 706
E06C 112

US Classification:

182211

Abstract:

The fly sections of extension ladders are provided at the bottom end with opposed housing bars upon which a rung is mounted thereby avoiding the usual hazard of a skipped rung. The housing bars are constructed and mounted on the fly section to provide multi-directional strength while permitting full movement, in the space between the mounting bar and the ladder side rail, of automatic hook locks equipped with conventional toggles. The improved constructions are especially suited to the manufacture of all-metal ladders.

US Patent:

41879287, Feb 12, 1980

Filed:

Mar 6, 1978

Appl. No.:

5/883578

Inventors:

Clayton E. Larson - Brooklyn NY

Assignee:

White Metal Rolling & Stamping Corp. - Brooklyn NY

International Classification:

E06C 118
E06C 1393
E06C 714

US Classification:

182124

Abstract:

Stepladders made of extruded aluminum channels include special forms of front section bracing and brackets for a bucket rack that enables the ladder to be fabricated with a minimum of fasteners and parts while providing improved strength, rigidity and safety properties.

US Patent:

40390470, Aug 2, 1977

Filed:

May 26, 1976

Appl. No.:

5/690175

Inventors:

Clayton E. Larson - Brooklyn NY
Earl T. Records - Warsaw IN

Assignee:

White Metal Rolling & Stamping Corporation - Brooklyn NY

International Classification:

E06C 746

US Classification:

182111

Abstract:

The safety of ladders is improved by providing them with pivoted foot members that carry ground spikes that rest against the foot member when not in use and rotate for ground penetration into a position in which the foot member exerts leverage to dig the spikes into the ground.

US Patent:

42666317, May 12, 1981

Filed:

Mar 26, 1980

Appl. No.:

6/133983

Inventors:

Clayton E. Larson - Brooklyn NY
Edward H. Lemp - Bellows Falls VT

Assignee:

White Metal Rolling & Stamping Corp. - Brooklyn NY

International Classification:

E06C 706

US Classification:

182211

Abstract:

Extension ladders having a bed section and a fly section comprises automatic hook locks of a rotary type that rotate on shafts carried on brackets parallel to the side rails of the ladder fly section to move between normal hooking positions and intermittent passing positions. Pivoted toggles rotate with the hook locks and serve to move them into their passing position as the fly section is lowered. The hook portions of the locks are contoured to move them into their passing position by contact with step members of the bed section as the fly section is raised.

US Patent:

43323081, Jun 1, 1982

Filed:

Jun 30, 1980

Appl. No.:

6/164294

Inventors:

Clayton E. Larson - Brooklyn NY

Assignee:

White Metal Rolling & Stamping Corp. - Brooklyn NY

International Classification:

E06C 116
E06C 708

US Classification:

182120

Abstract:

Stepladders having flat tread steps have a step extender fixed along the rear edge of the first step from the top of the ladder to increase the width of the step bearing surface and improve ladder safety. The extender comprises a flat tread portion and a depending brace portion. A minor section of a longitudinal edge of the extender overlaps the upper, rear edge of the ladder step which it serves to widen.

US Patent:

42045878, May 27, 1980

Filed:

Oct 13, 1978

Appl. No.:

5/951068

Inventors:

Clayton E. Larson - Brooklyn NY

Assignee:

White Metal Rolling and Stamping Corp. - Brooklyn NY

International Classification:

E06C 708
E06C 750

US Classification:

182228

Abstract:

Ladders made of metal comprising first sections of metal channel that intersect second sections of metal channel have the first and second sections joined together without use of rivets or weldings by providing the first sections with pairs of U-shaped cavities, the second sections with tip flanges, fitting the tip flanges, in various ways, into the U-shaped cavities and press forming portions of the first sections against the tip flanges to lock the first and second sections together. Typically, the first sections would be side rails and the second sections, steps, rungs or cross braces.

US Patent:

39483525, Apr 6, 1976

Filed:

Jul 15, 1975

Appl. No.:

5/596005

Inventors:

Clayton E. Larson - Brooklyn NY
Edwin H. Lemp - Bellows Falls VT

Assignee:

White Metal Rolling & Stamping Corporation - Brooklyn NY

International Classification:

E06C 744

US Classification:

182204

Abstract:

A extension ladder formed of interlocked top and bottom sections has ladder leveler means comprising a pair of sleeve members that slideably encompass the lower end of the bottom section siderails. A short flange on each sleeve member is captivated by a guide member carried on the inside of each lower siderail permitting the sleeve members to be securely retained in operative position on the bottom of the ladder without interference with the free sliding of the ladder top section along the bottom section.

US Patent:

40119262, Mar 15, 1977

Filed:

Apr 12, 1976

Appl. No.:

5/676391

Inventors:

Clayton E. Larson - Brooklyn NY
Edwin H. Lemp - Bellows Falls VT

Assignee:

White Metal Rolling & Stamping Corporation - Brooklyn NY

International Classification:

E06C 536
E06C 742

US Classification:

182107

Abstract:

Stepladders having good lateral stability comprise a pair of channel members of fixed length pivoted at their top end to the side rails of the front ladder section to swing between a closed position and an extended position. The bottom ends of each channel member carries a foot member which always extends below the bottom end of the front section side rails so that the front section is supported in use of the ladder exclusively upon said foot members and not upon the bottom ends of the side rails.