US1836516A

US1836516A - Safety ladder platform

Info

Publication number: US1836516A
Application number: US435298A
Authority: US
Inventors: John E Weiser
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-12
Filing date: 1930-03-12
Publication date: 1931-12-15
Anticipated expiration: 1948-12-15

Description

7 Dec. 15, 1931.

J. E. WEISER ,8 6,516

SAFETY LADDER PLATFORM 7 Filed March 12, 1930 Patented Dec. 15, 1931 UNITED STATES JOHN E. "WEISER, OF WOOSTER, OHIO SAFETY LADDER PLATFORM Application filed March 12,

My invention relates to improvements in safety ladder platforms for painters and builders use, and particularly to ladder platforms of this character which are adapted to be supported hoirzontally at their opposite ends along side of walls and buildings on end ladders or brackets for access of workmen thereto intermediate said ends, and to provide improved means for stiffening and strengthening the platform along its longitudinal center to adequately support the great weight placed thereon by men at work on the building; and further, to provide for increasing such weight and add to the rigidity and safety of the platform under such stress.

Heretofore latforms of this character have been partly strengthened by means of guy rods extending from end to end thereof over elevated bracket supports intermediate the ends thereof, but without adequte means for securing the ends of such rods, or increasing and adjusting the tension thereof by taking up the slack therein arising from wear and tear in use, so that such soon become too weak and unstable for safety, particularly when such platforms are of considerable length.

It is the principal object of my invention to remedy such defects by combining with the arching of the under surface of both of the side beams or girts of the platform and inlaying therealong a strong cable, with improved means for securing the ends thereof to the corresponding ends of the side beams, and for tightening and taking up the slack of the cable, and preventing the slipping or loosening thereof by added stress or weight imposed upon it, all of which is accomplished by the means hereinafter set forth and as stated in the appended claim.

My invention is illustrated by the accompanying drawings in which similar letters and figures of reference indicate like parts. 45 Referring thereto, Fig. 1 is a plan perspec- 1930. Serial No. 435,298.

tive View of my safety ladder platform, the girts or side-beams A being partly cut away near its center to show the position of the cable D therein.

form side rail. B is an angular metal plate which is permanently mounted in the notch B out near the end of the beam A, and terminates with an upturned portion adapted to abut against the said notch, as at a. It is further provided with a series of angular ribs f, f, on its upper surface, which are fitted to register with like ribs on the under surface of the metal plate C which is adjustably secured thereto by the threaded bolt 0 passed thru both plates and thru the sidebeam A near its terminus, as shown in Fig. 2. The plate C is further provided with the terminal block C which is bored and fitted to receive and securely hold the adjacent end of the cable D therein in alignment with the furrow d in the under surface of the beam A. The ribs f, f, are so arranged with respect to each other on the two plates as to render taut the cable when the plate C is drawn snugly down upon the plate B which is prevented from yielding longitudinally by the abutment a, thus making a very rigid and imyielding connection between the cable and beam, and giving the platform unusual rigidity and strength by stretching the cable tightly over the beam, as aforesaid.

It will be understood that the pair of girts A are joined together by suitable rungs b which support the floor boards 9, as shown in Fig. 1, in the usual Well known Way.

Having thus fully described my invention, what I claim as new and desired to secure by Letters Patent is A safety ladder platform comprising in combination, a pair of side girts having notches, respectively, at each end, a metal plate mounted at each end so as to abut against the adjacent notch, said plate having angular ribs across its upper surface, a see- Fig. 2 is an enlarged and inverted View of one end of the ladder plat- 0nd metal plate having angular ribs adapted to register With the ribs of said abutting plate, adjustably mounted thereon, a metal block integral with said latter plate having a socket therein means for adjustably securing said plates together and to said side girt, and a cable stretched over each girt and secured at each end in the socket of the adjacent integral block.

In Witness whereof I hereunto set my name this 20th day of November, A. D. 1929.

J. E. WEISER.