US26433A - John b - Google Patents

Description

. To all whom 'it may concern.'

UNITED sTATEs JOHN B; HOLMES, JR., OF NEW YORK, N. Y.

Ea'rcHET-ULLEYFOR BLIND-Gomis. .n n f Specicatiionof `Letters Patent No. 26,433, dated. becember i Be it known that I, JOHN B. HOLMES, Jr., of the city, county, and State of New` York, have invented, made, and applied to use a certain new and useful" Improvement in Ratchet-Pulleys for Blind-Gordsyand I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the saine, reference be* inghad to the annexed drawing, `making part of this specification, wherein i Figure 1, is an elevation of my ratchet rack; Fig. 2 is a side view of the same, and Fig. 3 is a sectionof the roller and bridle pawl taking the rack.

Similar letters denote the same parts.

The ratchet racks taking the blind cord that have heretofore been used, have been mostlyformed either by two wedges set in slides, or else by a spring pawl `taking a ratchet. In the first instance the wedges occupy so much room that but little movement is obtained compared to the length of the slides holding such wedges, beside which the wedges often become so tight thatdiiiiculty exists in separating them and releasing the tension of the blind cord: In the latter instance the s ring pawl and pulley, have to be slid out rom the bottom end and rentered at the top in order to lessen or vary the tension on the blind cord. y y i My said invention obviates all the difficulties before mentioned and consists in a ratchet rack projecting slightly lfrom the window casing and with the teeth on the back thereof taking a bridle pawl that passes around and receives the roller for Athe blind cord, thereby the ratchet teeth are kept almost out of sight, and the bridle and pulley can be slid in either direction the entire length of the ratchet. My ratchet "pulley is y thus more available than other fixtures, and

i is reliable, durable and neat.

In the drawing a 1s ametal bar bent or formed at the ends so as to be attached by thescrews or nails 1, 1. 2, 2 are rack teeth onthe back of this bar taking the cross PATENTOFFICE piece 3, of the bridle pawl b, on which th` pinl 4, projects and form thelaxis fora p celain roller al, that receives y blindlco It will now be seen that theblind cord pull ing upward throws thecrosswV iece" 3, in`to i the teeth `2, and thereby thebri leand pulley are effectually retained in lace, andthe pulley can be slid down `until the cordI has suiicient tension.` If-thelcord is to betaken: off or the tension` lessened, the pulley. canb` slid up by pressingupon the lowerpart of the roller d, and drawino the upper part outward, which throws the" cross piece, clear of the teeth 2, andfleaves the ,whole free to slide up or down. I have shownat c, a spring which may beiused when desredto keep the cross iece 3, toward the teeth2l i `By the use o my porcelain`knobd,`o1rthe pin 4, I form a du`rable,`handsome and re- 1 liable rollerforthe cord which is` far bette than the cast or sheet metal rollers, and will H be `much more ornamental and notliableto injure the cord, and the cap or headusually placed in front of the rollerisdispensed with. V I do not claim a box having teeth` onthe back thereof or in the upper and inner side of said box; neither `do I claim aporcelain` knob takinoP the cord, in itself,but n What I cllaim and desire to securelbyLet! ters Patent is` y n n y 1. The metallicbar projecting from the window casing and havilng` teeth on the back y n thereof, in combinationwith the bridle pawlb, passingaround saidbar` a, and carrying the pulley for the cord as set forth. l y

2. I also claimthe porcelain rolle d, on the center pin ,4, in@ combination w'th f the bridle pawl b, and bar a, substantiallyas forth. 1i l V i In witness whereofI havehereunto setf my signature this ninth day of Noyembe B. HOLMES, JR.

JAMES HeROLDf

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