US816914A - Antislip attachment for ladders. - Google Patents

Description

No. 816,914. PATENTED APR. 3,- 1906.

H. D.KHINCKLEY. ANTISLIP ATTACHMENT FR LADDBRS.

APPLICATION FILED AUG. 9. 1904.

@PATENT OFF-ron. l f

HENRY D. ",HINGKLEY', `"or HA'RTFoRn," c,lonnitorioufr,` `inaar(nach or# .one

`HALF i To cHARLEs '.RQKEENEY ANDl om;L HALF TO THE 'HINCKLEY SPECIALTY COMPANY, BOTH` OF` H ARIFORD, CONNECTICUT.

l i Jim1-lsLyleaTrilrcsirmiENTFonflaannsrasi` vQZ'o all whrmil t 'maycon/cern@` j Y u Be it .known that I," HENRYD. HINoKLEY,

a citizen ofthe United` States, residing at "Hartford, `in the county of Hartford andState `of Connecticut, have `invented certain new 1. Yanduseaul Improvements inAntislip Attachments for Ladders,`of which the `fllovvingjisa f. specification.

` 12C)` of means. forv preventing slippage o` f the .lad-

d, view of one ofthe Fig. 5 is a sectiona i adder.

throughout the several boa 5, which is "My invention `relates to `''att'achments for ladders, and has `for its object the]` revision der'vvhenplaced in position.

'A furtherobj ect `of the invention 4is the rovision `(of.anwattachment :for ladders YW ich Wheniapplied to the `terminationsof the. sides .thereof Will-automaticall .adjustitself to any inclined position in vvhc .placed andwill prevent the slippage thereof.

the ladder 'may be A further objectof theinvention is theprovision ofa universal joint in an antisli con nection, as'will be `hereinafter describe Other objects of the invention `will be hereinafter set forth.

In theaccompanyin drawins,` Figure 1 is a sideelevation ofthe oot of aadderyshowing my improved attachment in place there on. away, of a :ladder-equipped `with .my inven- -Whicl1is to be attached to the foot of the ladder. `Fi 7 is asideelevation ofa modified `form of Xture, and Fig. -9 is a bottomplan view of the device'shown in Fig. 7 Fig; Slis a side elevation of the `fixture shown in Fi 6, illustratingthe boit by means of which this art of the .attachment is secured tothe Like characters desig views. Referring to the drawings, A designates `one ofthe common forms of ladder, 1 the ,side pieces,.and 2the rounds thereof.

Designated bythe numeral 3` is `a plate having` anear4 perforated .at 4 to `receive a passed through the side piece land is secured by'a .nut 6. Prods or points 7 onsaid plate enter therend or foot` ofthe side piece, `and the plate is rovidedvvithears 8, one projecting from `eac .of itssides, said ne Lettera Patent. ippiimioafildaugua 9, i904. serial No. `amines;

rball, an

. 14,' `which 4may be Figa 4 is a sidevground or Walkupon which it is 4:joint capable of `connection Wit f may be substituted'therefor Without deparl"ture from the invention.

cur. which is applied to the foot of each side piece nate similar parts `of the ladder, the universal them to firmly enga the? ladder islplace any di pa e ofsaid ladder.

i `emanatiAlaiifaieoa ears heingperforated and internally threaded at 8 to receive screws Qhaving conical points. *A ball 1() isffittedfbetweenthe ears and isprovided "with 4sockets yto receive `the conical points ofthe screws 9. ,A plate 1l, longer Y than* the. platelgB, is provided with perforated ears 12 forthe reception of screws 13, having conical'- oints fitted n--other recesses of the f on its: under side this plate is provided in oneform of the invention Witha ad of rubber, leather, or ot er suitable material.l V.This padris shown prowill prevent `slippage of thefplate. lffdesired the pad may be omitted, in whichcase the bottom of the plate 11 ``willberoughened to accomplish the same result. j

"In Figa? and 9 a plate 15, similar to plate 1l, is employed and is rovided on its under surface with teeth or s arpened projections lfwhich will engage the surface on which' the ladder restsandwill revent the slippage of the ladder, `said lplate screws 13. T ere is practically no'difference between the plate of.` Figs. 8 and 9 and that of the other 7figures except in proportions and .in` the bearing-surfaces, the prods enabling the ladder to be held Without slippage on the p aced.

Whilea balljo1nt is-shown, an universal a ladder When ladders Vas usually constructed are setfat an angle, the Vends of the side pieces have a tendency to slip upon `thefioor or other surface, zand` frequently `accidents oc With my improved attachment, one of connections perin horizontal poof` a` person upon angle, `Whether the mit the plates 11 to remaln sitions, and as the Weight the ladderis appliedat an the resultant `action upon the plates 5 causes e the surface upon which `and absolutely prevent Whi e t e improved attachment `constitutes auseful Iarticle of hardware to be applied to ladders `or'other articles, the ladders "Yidedfwitna roughned 0I'. serrated enga? i v mg `:sur-face, Whi'lh O aving perforations 'with lnternall -threaded walls to receive the ladder be inclined in one oranother direction,

TOO

- cured to the foot of sai may be sold with said attachment in place on each of the side pieces in'a ladder of the kind r.antislip attachment comprising plates, one of which is secured to the foot of said ladder, and a universal joint connecting the plates. 2. The combination, with a ladder, of an antislip attachment com rising a plate seladder; a second plate,. provided with means to prevent slippage; and a universal joint connecting sald plates.

` 3. The combination, with a ladder, of an :antisli attachment secured to the foot thereof, an comprising a plate havin ears a second plate mounted for universa movement between the ears; and means carried by said second plate for preventing slippage of the attachment.

4. The combination, with a ladder, of a plate secured tothe foot thereof, said plate aving perforated ears; a second plate aving ears a universal joint carried by the ears of both plates; and an antislip device carried by the second late.

5.7The com ination, with a ladder, of a plate secured to the foot thereof, said plate aving perforated and internally-threaded f ears; a second plate having perforated and internally-threaded ears a ball located between the ears; screws having points entering recesses of the ball; and an antislip device carried by said second late.

6. The combination, Wit a plate having a flat base, and a perforated ear rising from said base, and also having separated ears deending from said base, of screws threaded into said depending ears; a ball having recesses to receive the ends ofthe screws a second plate having perforated ears rising there,

from; screws threaded into the earsy of said second plate, and entering the ball; and an antislip device carried by said second plate.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY D. HINCKLEY.

Witnesses y FREDERICKLE. ANDERSON, FRANCES E-BLoDGETT.

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