US2432781A

US2432781A - Ladder attachment

Info

Publication number: US2432781A
Application number: US650539A
Authority: US
Inventors: Cecil E Mann
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-02-27
Filing date: 1946-02-27
Publication date: 1947-12-16
Anticipated expiration: 1964-12-16

Description

Dec. 16,1947 ,C.VE.MANN 2 781 LADDER ATTACHMENT 5 Filed Feb. 27, 1946 Inventor C'ecilE/warwz/ Attorneys Patented Dec. 16, 1947 UNITED STATES PATENT OFFICE LADDER ATTACHMENT Cecil E. Mann, Pontiac, Mich. Application February 2'7, 1946, Serial No. 650,539

1 Claim. 1

The invention as described herein, and illustrated in the accompanying drawings, consists of an attachment for ladders, an object of which is to provide means whereby a ladder may be held in any desired position.

Another object of the invention is to provide slidable ladder hooks automatically locked in any position upon a, ladder.

A further object of this inventionis to provide a pair of ladder hooks and means whereby a ladder may be slidably adjusted relative thereto.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is an elevational View of the device shown attached to the end of a ladder,

Figure 2 is a side elevational view thereof,

Figure 3 is a view similar to Figure 1 from the reverse side thereof,

Figure 4 is a sectional view on line t4 of Figure 1,

Figure 5 is an enlarged sectional View taken on line 55 of Figure 3,

Figures 6 and 7 are diagrammatic views illus trating applications of the device. I

While one embodiment of the invention is illustrated in the above referred to drawings, it is to be understood that they are merely for the purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the invention may be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of the device, which is to be limited only in accordance with the appended claim. And while there is stated the primary field of utility of the invention it remains obvious that it may be employed in any other capacity wherein it may be found applicable.

In the accompanying drawings, and in the following specification, the same reference characters are used to designate the same parts and elements throughout and in which It refers to the invention in its entirety and N indicates a ladder on which is mounted the hook attachment it, which consists of a pair of spaced side supports i2 and I3 to the upper ends l4 and |5 of which are fixedly secured hooks l6 and ii. The supports l2 and I3 are connected by cross braces l8 and I9 secured centrally together at 25. The said members I2 and I3 seat upon the rails 2| and 22 of a ladder II and are secured to said rails by

cuffs

23 and 24 which engage said rails 2 slidably. The

upper ends

25 and 26 of the members 2 and 3 are connected by a cross head 21, the ends 28 and 290i which extend beyond the rails 2| and 22 and are returned to form bearings 361 and 3| for

jaws

32 and 33 mounted within said bearings and are provided with teeth 34 and 35 for engaging said rails 2| and 22, whereby the attachment l0 may be fixedly held to the ladder at any desired position thereon. The

terminals

36 and 31 of the member 21 extend inwardly from the bearings 3!] and 3| and are looped over the said rails 2| and 22. These

members

23 and 24, 33 and 31 hold the attachment securely to the ladder.

The

jaws

32 and 33 are fixed to the

ends

33 and 39 of the

lever arms

40 and 4| which are pivoted at 42 and 43 to the said bearings 3E! and 3| and their

lower ends

44 and 45 are connected to springs 46 and 41, the other ends of which are attached to the cross braces l8 and I9, whereby the said

jaws

32 and 33 are normally held into biting relation with the said rails 2| and 22. Connected to the

lower ends

44 and 45 of the members 4H and 4| is a cable 48, to the center 43 of which is fixed to one end 50 of a cable 5| by means of which the said

ends

44 and 45 may be drawn up to release

jaws

32 and 33 from the ladder rails whereby the member In may be adjusted to a desired position on the ladder. The cable 5| operates over a pulley 52 which is attached to the cross head 21.

From the foregoing it will be seen that I have provided an attachment for ladders which may be easily manipulated to adjust itself to the ladder whereby the ladder may be secured to any part of a building, roof, gable, dormer window or any other portion of a building desired.

From the foregoing specification it will become apparent that the invention disclosed will adequately accomplish the functions for which it has been designed and in an economical manner and that its simplicity, accuracy and ease of operation are such as to provide a relatively inexpensive device considering what it will accomplish and that it will find an important place in the art to which it appertains when once placed on the market.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described the invention that which is claimed to be new and desired to be procured by Letters Patent is:

In combination with a ladder and a remotely controlled ladder attachment slidably supported thereon including a pair of parallel extending side supports adapted to slidably engage the rear edges of the ladder rails, crossed braces connected between said side supports, U-shape ladder rail engaging cuffs on the lower ends of said side supports, a cross head secured transversely to the upper ends of said side supports being bent forwardly at right angles to form bearing housings extending laterally of the ladder rails, toothed ladder engaging dogs pivotally mounted in said bearing housings having inwardly directed actuating handles on their inner ends, resilient means connected between said handles and resiliently holding said toothed ladder engaging dogs in position to engage the sides of the ladder when said attachment is applied thereto, a release rope attached to said handles, and U-shape guide housings formed at right angles to said bearing housings adapted to extend over the forward edges of the ladder when said attachment is in operative position.

CECIL E. MANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PA IE NTS Number Name Date 66,961 Heuermann July 23, 1867 208,852 Roadell Oct. 8, 1878 715,944 Bauer Dec. 16, 1902 799,782 Ellinger Sept. 19, 1905 1,018,043 Gaw Feb. 20, 1912 1,030,905 Lucas July 2, 1921 1,522,292 Enssle Jan. 6, 1925 1,658,191 Gravning Feb. 7, 1928 1,879,244 Hoflman Sept. 27, 1932