US2149781A - Safety device for ladders - Google Patents

Safety device for ladders Download PDF

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Publication number
US2149781A
US2149781A US172421A US17242137A US2149781A US 2149781 A US2149781 A US 2149781A US 172421 A US172421 A US 172421A US 17242137 A US17242137 A US 17242137A US 2149781 A US2149781 A US 2149781A
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US
United States
Prior art keywords
ladder
ladders
safety device
leg
attachment
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
Application number
US172421A
Inventor
Leiser Henry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANNE LEISER
DOROTHY R ATLER
Original Assignee
ANNE LEISER
DOROTHY R ATLER
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ANNE LEISER, DOROTHY R ATLER filed Critical ANNE LEISER
Priority to US172421A priority Critical patent/US2149781A/en
Application granted granted Critical
Publication of US2149781A publication Critical patent/US2149781A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/42—Ladder feet; Supports therefor
    • E06C7/423—Ladder stabilising struts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/044—Clamping or clipping connections for rods or tubes being in angled relationship
    • F16B7/048—Clamping or clipping connections for rods or tubes being in angled relationship for rods or for tubes without using the innerside thereof
    • F16B7/0493—Clamping or clipping connections for rods or tubes being in angled relationship for rods or for tubes without using the innerside thereof forming a crossed-over connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/052—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member having a radial flange secured to the flat surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/058—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member being secured to the rod by transverse fasteners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/50—Flanged connections
    • F16B2200/503—Flanged connections the flange being separate from the elements to be connected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/33—Transverse rod to spaced plate surfaces

Definitions

  • This invention relates to an attachment designed'for use with ladders, the primary object of the invention being to provide means to brace the ladder with which the device is used, against lateral movement due to high wind pressure, or under the weight of the person standing on the ladder.
  • Another important object of the invention is the provision of means to prevent the lower end of the ladder from slipping away from the building or structure against which the ladder is leaning, due to excessive weight on the ladder, vibration of the ladder, or should the lower end of the ladder be placed too far away from the structure against which the ladder is placed.
  • Still another object of the invention is to brace the ladder when the ladder is placed against a weak structure.
  • Figure MS a fragmental perspective view illustrating a ladder equipped with an attachment, constructed in accordance with the invention.
  • Figure 2 is a plan view of one of the securing members employed in securing the device to the ladder.
  • Figure 3 is a side elevational view thereof.
  • Figure 4 is a'sectional view taken on line 44 of Figure 2, one of the supporting legs of the attachment, being shown as positioned in the bracket or securing device.
  • the ladder on which the attachment is shown as mounted is indicated generally by the reference character 5, the ladder being shown as having its lower end as positioned in spaced relation with a structure, against which the ladder is positioned.
  • the attachment comprises a pair of supporting members, and since these supporting members are identical in construction, only one of the supporting members will be herein described in detail.
  • Each sup-porting member includes a base plate indicated by the reference character 6, and a tubular portion 1 formed integral therewith, the tubular portion 1 being disposed at oblique angles vibrations of the ladder.
  • the' plate 6 of the securing device may be secured to the outer face of the side rail of a ladder structure, and the tubular portion 1 there- 6 of will be disposed in such position that it will support the adjustable leg member, associated therewith, at an oblique angle with respect to the side rail of the ladder.
  • tubular section 1 is formed in- 10 tegral with the plate 6, a web indicated by the reference character 8 is formed between the tubular section I and plate 6.
  • the web 8 is substantially wide near one end of the tubular member 1, and tapers towards the opposite end of the tubular member with the result that the opposite end of the tubular member is disposed in close relation with the plate 6.
  • the tubular portion 1 is supported in an inclined position, with the result that the leg members, which in the present showing are indicated by the reference character 9, and which are held within the supporting members, are disposed at oblique angles with respect to the front and rear edges of the side rails of the ladder, the lower ends of the leg members 9 being spread apart, to brace the ladder against lateral movement, caused by wind pressure, excessive weight on the ladder, and
  • a screw indicated by the reference character I 9 extends through a threaded opening injthe tubular section 1, and is adapted to engage the leg member 9 associated therewith.
  • An operating handle indicated by the reference extends through an opening I2 formed in the screw, and affords means whereby the screw may be rotated to engage or disengage the leg member, as the case may be.
  • leg members 9 of the attachment may be moved to various angles with respect to the ladder, bracing the ladder against lateral movement or movement away from the building against which it is positioned.
  • the ladder equipped with an attachment as described may be supported on an uneven surface, by adjusting the leg members 9 with respect to each other, to compensate for the irregular surface.
  • Bolts indicated by the reference character [3 extend through openings in' the plate 6, and pass through openings in the side rails of the ladder 55 w the base plate and connecting the tubular member with the base plate, said Web being wide at one end and narrow at the other end whereby the tubular member is inclined with respect to the side rail of the ladder, a bracing leg member slidable through the tubular member, a screw movable through the tubular member and adapted to engage the bracing leg adjustably securing the bracing leg within the tubular member.

Description

March 7,1939. LEISER 2,149,781
SAFETY DEVICE FOR LADDERS Filed Nov. 2, 1937 Q71 .Zaisefl INVENTOR.
ATTORNEYS.
Patented Mar. 7, 1939 SAFETY DEVICE FOR LADDERS Henry Leiser, Denver, (3010., assignor to Dorothy R. Atler and Anne Leiser Application November 2, 1937, Serial No. 172,421
1 Claim.
This invention relates to an attachment designed'for use with ladders, the primary object of the invention being to provide means to brace the ladder with which the device is used, against lateral movement due to high wind pressure, or under the weight of the person standing on the ladder.
Another important object of the invention is the provision of means to prevent the lower end of the ladder from slipping away from the building or structure against which the ladder is leaning, due to excessive weight on the ladder, vibration of the ladder, or should the lower end of the ladder be placed too far away from the structure against which the ladder is placed.
Still another object of the invention is to brace the ladder when the ladder is placed against a weak structure.
With the foregoing and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope of what is claimed, without departing from the spirit of the invention.
Referring to the drawing:
Figure MS a fragmental perspective view illustrating a ladder equipped with an attachment, constructed in accordance with the invention.
Figure 2 is a plan view of one of the securing members employed in securing the device to the ladder.
Figure 3 is a side elevational view thereof.
Figure 4 is a'sectional view taken on line 44 of Figure 2, one of the supporting legs of the attachment, being shown as positioned in the bracket or securing device.
Referring to the drawing in detail, the ladder on which the attachment is shown as mounted, is indicated generally by the reference character 5, the ladder being shown as having its lower end as positioned in spaced relation with a structure, against which the ladder is positioned.
The attachment comprises a pair of supporting members, and since these supporting members are identical in construction, only one of the supporting members will be herein described in detail.
Each sup-porting member includes a base plate indicated by the reference character 6, and a tubular portion 1 formed integral therewith, the tubular portion 1 being disposed at oblique angles vibrations of the ladder.
, character I l with respect to the side edges of the plate 6, as clearly shown by the drawing. Due to this construction, the' plate 6 of the securing device may be secured to the outer face of the side rail of a ladder structure, and the tubular portion 1 there- 6 of will be disposed in such position that it will support the adjustable leg member, associated therewith, at an oblique angle with respect to the side rail of the ladder.
Although the tubular section 1 is formed in- 10 tegral with the plate 6, a web indicated by the reference character 8 is formed between the tubular section I and plate 6. As shown by Figure 3 of the drawing, the web 8 is substantially wide near one end of the tubular member 1, and tapers towards the opposite end of the tubular member with the result that the opposite end of the tubular member is disposed in close relation with the plate 6. Due to this construction, the tubular portion 1 is supported in an inclined position, with the result that the leg members, which in the present showing are indicated by the reference character 9, and which are held within the supporting members, are disposed at oblique angles with respect to the front and rear edges of the side rails of the ladder, the lower ends of the leg members 9 being spread apart, to brace the ladder against lateral movement, caused by wind pressure, excessive weight on the ladder, and
A screw indicated by the reference character I 9, extends through a threaded opening injthe tubular section 1, and is adapted to engage the leg member 9 associated therewith.
An operating handle indicated by the reference extends through an opening I2 formed in the screw, and affords means whereby the screw may be rotated to engage or disengage the leg member, as the case may be.
From the foregoing it will be seen that due to the construction shown and described, the leg members 9 of the attachment may be moved to various angles with respect to the ladder, bracing the ladder against lateral movement or movement away from the building against which it is positioned.
It might be further stated that due to this construction, the ladder equipped with an attachment as described, may be supported on an uneven surface, by adjusting the leg members 9 with respect to each other, to compensate for the irregular surface.
Bolts indicated by the reference character [3 extend through openings in' the plate 6, and pass through openings in the side rails of the ladder 55 w the base plate and connecting the tubular member with the base plate, said Web being wide at one end and narrow at the other end whereby the tubular member is inclined with respect to the side rail of the ladder, a bracing leg member slidable through the tubular member, a screw movable through the tubular member and adapted to engage the bracing leg adjustably securing the bracing leg within the tubular member.
HENRY LEISER.
US172421A 1937-11-02 1937-11-02 Safety device for ladders Expired - Lifetime US2149781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US172421A US2149781A (en) 1937-11-02 1937-11-02 Safety device for ladders

Applications Claiming Priority (1)

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US172421A US2149781A (en) 1937-11-02 1937-11-02 Safety device for ladders

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098540A (en) * 1962-02-12 1963-07-23 Edward C Hiner Scaffold
US4899849A (en) * 1988-12-05 1990-02-13 A. C. Innovations, Inc. Ladder stabilizer
US6167989B1 (en) * 1999-07-16 2001-01-02 Koock Elan Jung Ladder safety device
US20050189078A1 (en) * 2002-04-05 2005-09-01 Greg Whiting Automated venetian blinds
US20090107764A1 (en) * 2007-10-29 2009-04-30 Showalter Gregory J Lower ladder support
US20090263209A1 (en) * 2008-04-16 2009-10-22 Lego Dacta And Pitsco, Llc Metal to plastic connector for toy structures
US20090314579A1 (en) * 2008-06-18 2009-12-24 Allan Withers Ladder stabilizer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098540A (en) * 1962-02-12 1963-07-23 Edward C Hiner Scaffold
US4899849A (en) * 1988-12-05 1990-02-13 A. C. Innovations, Inc. Ladder stabilizer
EP0372897A1 (en) * 1988-12-05 1990-06-13 A.C. Innovations, Inc. Ladder Stabilizer
US6167989B1 (en) * 1999-07-16 2001-01-02 Koock Elan Jung Ladder safety device
US20050189078A1 (en) * 2002-04-05 2005-09-01 Greg Whiting Automated venetian blinds
US20090107764A1 (en) * 2007-10-29 2009-04-30 Showalter Gregory J Lower ladder support
US20090263209A1 (en) * 2008-04-16 2009-10-22 Lego Dacta And Pitsco, Llc Metal to plastic connector for toy structures
US8240939B2 (en) * 2008-04-16 2012-08-14 Lego A/S Metal to plastic connector for toy structures
US8579536B2 (en) * 2008-04-16 2013-11-12 Lego A/S Metal to plastic connector for toy structures
US20090314579A1 (en) * 2008-06-18 2009-12-24 Allan Withers Ladder stabilizer

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