US745320A - Extension step-ladder. - Google Patents
Extension step-ladder. Download PDFInfo
- Publication number
- US745320A US745320A US15622003A US1903156220A US745320A US 745320 A US745320 A US 745320A US 15622003 A US15622003 A US 15622003A US 1903156220 A US1903156220 A US 1903156220A US 745320 A US745320 A US 745320A
- Authority
- US
- United States
- Prior art keywords
- ladder
- standards
- extension
- extension step
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
- E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
Definitions
- TN NORRIS PETERS co. Fumapmu. wnsmuomm 0. c.
- My invention has relation to improvements -o in extension step-ladders; and it consists in the novel construction and arrangement of parts, more fully set forth in the specification and pointed outin the claims.
- Figure 1 is a side elevation l 5 of the step-ladder extended.
- Fig. 2 is a similar view showing the same closed.
- Fig. 4 is a rear eleation of Fig. 1.
- Fig. 5 is an enlarged crosssectional detail of the straps carried .by the rear standards of the ladder, and
- Fig. 6 is an enlarged cross-sectional detail of the casting or shoe carried by the front standards of the ladder.
- the object of my invention is to construct 2 an extension step-ladder which shall berigid when extended, one which is compact, durable, and cheap to manufacture.
- 1 represents the front fixed standards of the ladder, and 2 the rear hinged standards, the. upper platform 3 as usual.
- Adapted to slide along the fixed standards 1 are the for- 5 ward extension members 1, the connection between the two being effected by a tongue 5 in the standards 1 engaging a groove 6 on the members 4.
- the members 4 are each provided with a shoulder 7- at its upper end,
- Fig. 3 is aboth being secured to I (No model.)
- each shoe which embrace the front face of the members 1, Figs. 3, 6.
- a spring-controlled pull-knob 15 mounted along the upper end of each shoe is a spring-controlled pull-knob 15, the stem of which can be made to engage one of a series of sockets 16, disposed opposite the ends of the several steps of the extension members.
- the pull-knob 15 and the clamping-screws 10 the ladder may be set to any desirable extension, Fig. 1.
- the several standards and their extensions flare outwardly at the bottom, Figs. 3, 4, thereby insuring an expanded supporting-base for the ladder.
- the rear standards and their extensions are reinforced by wire braces 17 and 18, respectively.
- extension members having rear grooves for the reception of the tongues, shoes carried by the lateral faces of the fixed standards and spanning the seams formed between them, and the extension members, lips on each shoe deflected to-bear against the front face of each extension member, the'lateral faces of the extension members having a series of sockets, and pull-knobs carried by the shoes and having stems for engaging said sockets, substantially as set forth.
- a suitable terminal platform forward fixed standards and rear hinged standards for the same, tongues disposed along the front faces of the fixed standards, extension members having rear grooves for the reception of the tongues, an upper terminal shoulder on each extension member adapted to bear against the front shoes carried by the edge of the platform,
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- Ladders (AREA)
Description
No. 745,320. PATENTED DEC. 1, 1903. H. E. BRUNO.
- EXTENSION STEP LADDER.
APPLICATION IILED'MAY a, 1903.
no MODEL. 2 SHEETS-SHEET 1.
TN: NORRIS PETERS co. Fumapmu. wnsmuomm 0. c.
'NO. 745,s20. E PATENTED DEC. 1, 1903.
I H. E. BRUNO.
EXTENSION STEP LADDER. APPLIOATIOE FILED MAY s 1903.
NVO MODEL.
' 2 SHEETS-SHEET 2.
F3. 2. I F94) UNITED STATES Patented December 1, 1903.
PATENT OFFICE.
EXTENSION STEP-LADDER! SLEEGLFIGATION forming part of Letters Patent No. 745,320, dated December 1, 1903.
Application filed May 8,1903. Serial No. 156.220.
all whom it may concern:
Be it known that I, HERMAN E. BRUNO, a citizen of the United States, residing at St. Louis, State of Missouri, have invented a new 5 and useful Improvement in Extension Step- Ladders, of which the following is a specification, reference being had'to the accompanying drawings,forming a part thereof.
My invention has relation to improvements -o in extension step-ladders; and it consists in the novel construction and arrangement of parts, more fully set forth in the specification and pointed outin the claims.
In the drawings, Figure 1 is a side elevation l 5 of the step-ladder extended. Fig. 2 is a similar view showing the same closed. front elevation of Fig. 1. Fig. 4 is a rear eleation of Fig. 1. Fig. 5 is an enlarged crosssectional detail of the straps carried .by the rear standards of the ladder, and Fig. 6 is an enlarged cross-sectional detail of the casting or shoe carried by the front standards of the ladder.
The object of my invention is to construct 2 an extension step-ladder which shall berigid when extended, one which is compact, durable, and cheap to manufacture.
In detail the invention may be described as follows.
0 Referring to the drawings, 1 represents the front fixed standards of the ladder, and 2 the rear hinged standards, the. upper platform 3 as usual. Adapted to slide along the fixed standards 1 are the for- 5 ward extension members 1, the connection between the two being effected by a tongue 5 in the standards 1 engaging a groove 6 on the members 4. The members 4 are each provided with a shoulder 7- at its upper end,
which engages the projecting edge of the platform?) whenthe ladder is .closed, this arrangement contributing to the rigidity of the parts, as is obvious. Embracing the hinged standards 2 and the rear extension members 8 are straps 9, each strap being provided with a rear clamping-screw 10, the base of the screw loosely operating in a gripping -block 11, adapted to bear against and grip the surface of the member 8 and hold the parts together Fig. 3 is aboth being secured to I (No model.)
when once adjusted to the proper height. The standards 1 and 2 are connected by the folding links 12 12 as usual.
Secured to the outer lateral faces of the standards 1 1 and spanning the seam formed between said standards and their extension members 4: are castings or shoes 13, each shoe having the front deflected terminal lips 14.,
which embrace the front face of the members 1, Figs. 3, 6. Mounted along the upper end of each shoe is a spring-controlled pull-knob 15, the stem of which can be made to engage one of a series of sockets 16, disposed opposite the ends of the several steps of the extension members. By means of the pull-knob 15 and the clamping-screws 10 the ladder may be set to any desirable extension, Fig. 1.
The several standards and their extensions flare outwardly at the bottom, Figs. 3, 4, thereby insuring an expanded supporting-base for the ladder. The rear standards and their extensions are reinforced by wire braces 17 and 18, respectively.
Having described my invention, what I claim is- 1. In an extension step-ladder, a suitable terminal platform, forward fixed standards and rear hinged standards for the same,
tongues disposed along the front faces of the fixed standards, extension members having rear grooves for the reception of the tongues, shoes carried by the lateral faces of the fixed standards and spanning the seams formed between them, and the extension members, lips on each shoe deflected to-bear against the front face of each extension member, the'lateral faces of the extension members having a series of sockets, and pull-knobs carried by the shoes and having stems for engaging said sockets, substantially as set forth.
2. In an extension step-ladder, a suitable terminal platform, forward fixed standards and rear hinged standards for the same, tongues disposed along the front faces of the fixed standards, extension members having rear grooves for the reception of the tongues, an upper terminal shoulder on each extension member adapted to bear against the front shoes carried by the edge of the platform,
lateral faces of the fixed standards and spanstems for engaging said sockets, substantially ning the seams formed between them and the as set forth.
extension members, terminal deflected lips A on each shoe bearing against the front face HERMAN LR of each extension member, the lateral faces Witnesses:
of the latter having a series of sockets, and JNO. P. BECKER,
pull-knobs carried by the shoes and having J. RICHARD HAAS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15622003A US745320A (en) | 1903-05-08 | 1903-05-08 | Extension step-ladder. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15622003A US745320A (en) | 1903-05-08 | 1903-05-08 | Extension step-ladder. |
Publications (1)
Publication Number | Publication Date |
---|---|
US745320A true US745320A (en) | 1903-12-01 |
Family
ID=2813816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15622003A Expired - Lifetime US745320A (en) | 1903-05-08 | 1903-05-08 | Extension step-ladder. |
Country Status (1)
Country | Link |
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US (1) | US745320A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538501A (en) * | 1946-05-06 | 1951-01-16 | Bianchi Ambrose | Ladder |
US4182431A (en) * | 1978-03-13 | 1980-01-08 | Little Giant Industries Inc. | Combination extension and step ladder rungs therefor |
US4298093A (en) * | 1978-11-16 | 1981-11-03 | Little Giant Industries, Inc. | Sawhorse |
US4697305A (en) * | 1985-02-14 | 1987-10-06 | Harold R. Wing | Release mechanism for locking hinge for multi-positioned ladder |
US5000289A (en) * | 1990-05-21 | 1991-03-19 | Sanchez Iii Jose | Extendable step ladder |
US5074377A (en) * | 1988-11-12 | 1991-12-24 | Krause-Werk Gmbh & Co. Kg | Jointed ladder |
US5350038A (en) * | 1993-02-01 | 1994-09-27 | Lazarus Jonathan F | Foldable extension ladder and ladder sections therefor |
US20150047927A1 (en) * | 2013-08-13 | 2015-02-19 | Alejandro Escalona Nodarse | Removable lock for attaching additional extension ladder |
-
1903
- 1903-05-08 US US15622003A patent/US745320A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538501A (en) * | 1946-05-06 | 1951-01-16 | Bianchi Ambrose | Ladder |
US4182431A (en) * | 1978-03-13 | 1980-01-08 | Little Giant Industries Inc. | Combination extension and step ladder rungs therefor |
US4298093A (en) * | 1978-11-16 | 1981-11-03 | Little Giant Industries, Inc. | Sawhorse |
US4697305A (en) * | 1985-02-14 | 1987-10-06 | Harold R. Wing | Release mechanism for locking hinge for multi-positioned ladder |
US5074377A (en) * | 1988-11-12 | 1991-12-24 | Krause-Werk Gmbh & Co. Kg | Jointed ladder |
US5000289A (en) * | 1990-05-21 | 1991-03-19 | Sanchez Iii Jose | Extendable step ladder |
WO1991018179A1 (en) * | 1990-05-21 | 1991-11-28 | Jose Sanchez, Iii | Extendable step ladder |
US5350038A (en) * | 1993-02-01 | 1994-09-27 | Lazarus Jonathan F | Foldable extension ladder and ladder sections therefor |
US20150047927A1 (en) * | 2013-08-13 | 2015-02-19 | Alejandro Escalona Nodarse | Removable lock for attaching additional extension ladder |
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