US1244645A - Suspension-hook for extension-ladders. - Google Patents

Description

A SCHREINER SUSPENSION HO0K.FOR EXTENSION LADDERS.

APPLICATION FILED MAR. 29. 1'9'6.

Patented Oct. 30, 1917.

LQEMEE,

m m s 5 6 E. VT mm m A ED STA ES P E TOE IG Q 'ALBEB'IVSCHFREINQR,QEJDENVER, COLORADO, zissaenon sons-smug t-Aaannn 11VEANUFAGT-TTRENG1 CGMPANY, A= ;CUER,1?RA1ION "OFJCOLORADO;

'sfesi sasmas a r03 EXTENSION-LADDERS.

p c fi ttflSEatent. E Patente dOct. 30,

Application fiieafilrareh aegi-ieife. 1 stam na-87394.

p Be it known that l, AL E SQHRE'INER, a CltlZ611"0 thG"UHliid Sta-tes, residing at Denver, in the county of Denv er and State of Colorado, havemvented certain new and forEXtension Ladders, of which the following is'a specification; t.

M y' invention relates to suspension hooks ofthetype used in' cdnnection withsec'tion'al "en-tension ladders, for the purpose ofsuspending' one made-mama from the rounds another; g Theyprincipa l object ofmy' invention is 'toprovidea device ofsimple construction and adapted to engage a round of a. basal laddergs'ection for the suspensionof the relatively adjnstablesection to 'which its keeper is attached g r The hook has at its upper en'dair inclined face which permitsof itspassing'slidin'gly f across the rounds of theb'as al ladder-section during upward motion of the section to which its keeper is attached, and the hook is furthermore provided with a pivoted latch which during downward movement of the adjustable section of the ladder, is by engagement with the rounds of the lower section, moved to a position in which it bridges the round-engaging bend of the hook and thereby permits it to pass the rounds.

In the accompanying drawings in the various views of which like parts are similarly designated, Y

' Figure 1 is a perspective view of my improved suspension hook in its operative relation to the side bar of a ladder,

Fig. 2, a longitudinal sectionof an extension-ladder showing the operative position of the hook on one with relation to a round on the other,

Fig. 3, a view similarto Fig. 2, showing the position of the book while passing a round during downward movement of the ladder section to which it is attached, and

Fig. 4, a perspective view of the latch which is pivoted on the book.

In the drawings the reference numerals 2 and 3 designate the sections of an extension ladder which are each composed of a plurality of rounds 24 secured between two sidebars 5.

Theiounds of theladder -are pasta-an made of metal bars of channel section'- N improved suspension hook comprises keeper composed of a plate 6 provided with angularly disposedlugs 7 which engage an" edge of the side rail upon whose inner F3306 thefp latei's disposed.

The plate has-at its'loWer edge an; out

mraiy projecting lugs which' forms arecess 9 tore'ce'1ve the lower eX'triemityof a hook' 10 ted'on the keeper by which is pivotally mou I means-oi? a pin 12 "eiitend ing througlr alined openings in the h1g8 alt-M116 stay-person ofthe plate.- f i *The plate liasat-itsupper edge an integral tra-nsversely errtending guide-rail "con "*nectedtherewitlratits ends-by sto s MPand v provided to guide 1 the 11-061; and limit its pivotal movement in opposite directions in theoperatlon of' the device.

The pine, "is; furthermore orovided with aperturesTierthe passage off-screws -1 5-b mea s-er which itis attached to theiladder- The-ho 11tease of the invntiofi -icomprises a shank 16 which has at its lower end an aperture for it's pivotal connection" with "Tthe pin 12, and at its upper end a transverse, T

obliquely disposed bar 17 which is bentinwardly at one of its extremities to provide the bill 18 which in practice is hooked over suspended. V The upper face 19 of the transverse bar of the hook slants from the bill upwardly the round of the ladder-section from which I v the section to which the hook is attached, is

to engage the rounds of the lower ladder- I section during upward movement of the other section and thereby permit to pass across said rounds.

Pivotally suspended from the shank of the hook at a point between its upper end and its portion engaging the guide-rail 13, is a latch 20 of curvilinear form which when the hook is in its normal, inwardly slanting position in engagement with the forward stop of the guide rail, hangs with its lower end in a line with the rounds of thelower ladder-section. i i

The latchis composed of two arms 21 which are pivoted at opposite sides ofthe the hook hook shank, and a cross-piece 22 which when.

the latch is in its suspended position engages the edge of the shank to "limit the lnward movement of he latch and which when by engagement with a round of a ladder across which the hook is moved, the latch is moved upwardly, centrally engages the bill 18 of the hook to bridge the round-engaging bend of the same. 1 i

In the operation of my invention, two of the herein described suspension devices are fastened oppositely upon the inner faces of faces of the bars at the upper ends of the hooks, slide across the rounds of the lower section, each time moving the hooks about their pivots, it being understood that the hooks are normally maintained ina slanting position in engagement with thevforward stop 14 by gravitation. 7

After the hooks have passed the round frmnwhichthe adjustable section is to be arev associated is lowered to reduce the q Copies of this patent may be obtained for suspended, the section is lowered until the hooks engage said round as shown in Fig. 2. hen the section with which the hooks length of the ladder, the latches are by engagement with rounds-ofthe basal section, moved about their pivots into engagement with the bills of the respective hooks as illustrated in Fig. 3, thereby bridging the roundengaging bends of the same and permitting the passage of the hooks across the rounds,

.it being understood that-during downward five cents eac movement of the adjustable ladder section,

,it may be suspended from any round of the stress.

Having thus described my invention what I claim and desire. tosecure by LettersPatout is:

In an extension ladder, a plate lying fiat againsta side of aside-rail thereofleand having angularly disposed integral lugs which bear against an edge of the same, said plate being rigidly secured tof said side-rail and having at its upper. end a transverse slot provided by a guide-bar which is integrally connectedwith the plate by means of stops, and, at its lower end, an integral outwardly projecting lug which forms a recess, a suspension-hook loosely extending through said slotand into said recess, a pivot pin occupying alined apertures in the lug, the plate and the hook, and a latch pivotedon the hook and having a cross-piece to engage the bill ofthe same, when moved upwardly about its pivot. In testimony whereof I have afiixed my signature in presence or" two witnesses.

ALBERT SCHREINER. Witnesses: I i

j G. J. ROLLAN ET, p L. 'RHoAnEs.

h, b y addressing thefifiommis si'oner of Eatents,

Washington, G."

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