US1458231A - Lead block - Google Patents

Description

juan@ 12, i923.,

D. LAWSON LEAD LOGK Filed Jan. 27 1921 INVENTOR Y 'vAvEnporzT-Lnwson V' JM ATPORIVEYS-l l l WITNESS 14,/

Patented dune 12, 1923..

Ultlfylfl@ Ltddt entrent ferries.,

DAVENPORT LAWSON, OF ELK, CALIFORNLA, ASSEGNOR TO GOODYEAR REDWOOD CO.,

F ELK, CALIFORNIA, A CORPORATION 0F MAINE.

LEAD BLOCK.

Application filed January 27, 1921. Serial No. 440,295.

To all tlf/tom t may concern:

Be it known that l, DAVENPORT LAWSON,

a citizen of the United States, and a resident of Elk, county of Mendocino, and State of California, have invented a new and useful Lead Block, of which the following is a specification.

My invention relates to sheave blocks and the broad purpose of my invention is to provide an improved lead block for the lifting and control lines of my logging apparatus which is the subject of my copending application Serial Number 437,692, filed January 17, 1921 and patented @ctober 25, 1921, No. 1,394,745. More particularly, an object of my invention is the provision of a block in which both lifting and control lines are handled without danger of tangling, and characterized by simplicity and strength required in this service. Another object is the provision of a block of large size and great weight which may be assembled from relatively small and easily provided parts.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of my invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that I do not limit myself to the showing made by the said drawings and description, as l may adopt variations of the preferred form within the scope of my invention as set forth in the claims.

Referring to the drawings: Fig. 1 is a front elevation of the block and F ig. 2 is a side elevation.

The block of my invention comprises twin inside frame plates 2, each formed with a central boss 3, and laterally projecting arms 4. Stifening webs 6 extending from the boss 3 are disposed on the frame and arms. The twin plates are connected by a stiffening bar 7, preferably a section of pipe socketed in the bosses, and at their lower ends by a foot yoke 8 pinned to each frame plate between the lugs 9 formed thereon by the bolts 1l.

Arranged adjacent each frame plate 2 is an outside frame plate 12 similar to the inside plate and connected to it by the bolt 18 at the foot end which passes thru a spacing shell 14. At the head end, the frame plates are connected by the Ueform bar 16 pinned to each the bolts 17.

The bosses of each pair of inside and outside frame plates are formed with alined bearings in which a shaft 1S is journaled in bushing 19. Fixed on the shaft to turn between the frame plates is a sheave or pulley 21 grooved about its periphery to carry one of the lifting lines. A grease cup 22 fixed in each boss provides means for feeding lubricant te the shaft bea-ring.v The outer bearing is closed by a cover plate 28, the stiffening bar 7 acting as a closure for the inside bearings. In order to direct the lines into the bl'ock, an arcuate guide 24 is bolted to each inside and outside frame, and extends around the upper half of the sheave. A head yoke 26 provided with apertures 27 for the attachment of the anchor lines, connects the U-bars of the twin frames, being pinned thereto by bolts 2S. llhe head yoke is also provided with apertures 29 for the convenient attachment of other lines.

Swung from the center of the foot yoke by a clevis 31 and U-bar 32 is a single frame, mounting the sheave 33 over which runs the control line for the traveller carried by the lifting lines. The frame plates 84 of the single frame. are duplicates and the same as the outside frame plates 12 of the twin frames. The structures of shea-ve shaft, bearings and guides are also the same as those already described.

The block illustrated herein contains sheaves 16 in diameter mounted on hardened steel shafts 232; in diameter. The service in which it is used involves supporting a double lifting line extending over a space as great as 5000 feet, together with a heavy carrier and the carrier'control lines and the 2. A block comprising twin frames, a l0 10g swung from the carrier. sheave in each of said frames,` aJ head and I claim: a, foot yoke connecting said frames, a single l. A block comprising twin frames, a frame suspended from sadfoot yoke, and sheave in each of said frames, means cona sheave n Said s'ngleframe. necting said frames for holding them in In testimony whereof, I have hereunto-15 xelv rel etionawsingle framev pvotally Susset my hand. pended fromsaid twin frames, and asheave in said single frame. DAVENPORT LAWSON.

Images