US1168570A - Tar-drag. - Google Patents

Description

s. B. SHELDON.

IAR DRAG.

APPLICATION HLED m. I. 1915. 1 168 57. Patented Jan.- 18, 1916.

s. B. SHELDON.

Patented J an '2 SHEETS-SHEET 2.

SAMUEL 1B. SHELDON, OF DULUTH, ESDTA.

ran-Dues.

Specificatioh of Letters Patent.

Patented Jan. 18, T1916.

hpiolicetion filed April 1, 1915. Serial No. 18,535.

To all whom may C02Z06?'i?/ Be- It; known that l, SAMUEL B. Srmwon,

' a. citizen of the United States, and resident of Duluth, in the county or" St. Louis and State of Minnesota, have. invented certain new d. useful lrnprovhments in Tar DragS, of which theiollowlng 18 a specification.

My invention relates to lay-product coke ovens and has particular reference to anove'l nieans heavy tar in preventing the accumulation of the mains leading from. the ovens. v 1

In the operation of icy-product coke ovens the gas first liberated from the coal contains a quantity of tar and heavy hydrocarbons. The gas is collected in mains'located over the ovens and a large preportion of the tar condenses and accumulates in the'bottom of the main and is oh by suitable means. in practice a 'heavy pitch gathers in the main which is very diflicult to remove and which will cause obstruction if allowed to remain. Poke-holes. have I been provided through which bars or spoons. can be inserted to prevent this accumulation and obstruction. This is a laborious and inefficient means for overcomin'g'the trouble.

An object in the'present invention is to provide a drag or scraper Which shall be adapted to be reciprocated slowly from end to end of a gas main whereby to preventthe accumulation of the pitch referred. to and cause it topass away with themore fluid tar. This pitch isa very tough sub stance and tends to adhere tenaciously to the hottoni oi the mains; therefore a drag for loosening this substance must be heavy and strong andbe operated with. suiiicient force to cause 1t to thoroughly scrape :the male Elli from end to end.

The niventifbn Wlll he more readily .un derstood by reference to the accompanying drawin s. wherein.

Figure 1 a longitudinal section-through the mechanism located at one end of a main; Fig". 2 is a similar view showing the opposite end of the main, and, 3 is a section on the line 3-3 of Fig. 1.

in the drawings a gas main is indicated at 10; .At one end of the main, as showniin 1 I mount a. trough 11, which acts as a tar well or seal for the ,end of the gas main, which end is partially closed by the removable cover 12, leaving a. space-13, therebeneath, through which the tar drag in casing above the trough 11, are a pair of drums l4, l5, hoth'ozt Whichare shown as driven through the medium of a pinion. 16, connected by suitable ge'aringto a motor 17. A driving cable 18, passes over the drums M 15, and around a'pair of idlers 1i, looselymounted. on a shaft 20, these idlers of course rotating in opposite directions. Mounted on the bottom of the main 10 is a flanged guidingmeniher 21. as best shown in Fig. 3, the flanges 22, oi? which serve to retain in place and guidea drag 23. One end of the cable 18, is attached to the drag at 24, the cahle'thence passing around one of the idlers 19, the driving drums, then returning around the second idler and extending along the bottom of the main in the channel of the member 21, the portion of the cable thus utilized heingindicated at 25, in Fig. 3. This cable 25, is shownin Fig. 2, as extending around anddler 26,

main is substantially a duplication of that shown in Fig. l.

Mounted at the limit of the travel of the drag at either end of the main is a lever 33, having a counter-weight 3d, therein this lever being connected" to any suitable reversing-mechanism whereby the direction of movement of the prime mover may he changed. in the case of the motor shown the shaft of the lever 33, will he connected to a reversing switch. In the case of a steam engine of course the shaft will be connected to a reversing valve.

' in operation the treugh ii, and the lower part of the main 10., will contain tar to substantially the height indicated by the line 35, thus sealing the main against the escape of gas. The motor being started in. operation, the drag 23, Will be caused to move slowly from end to end of the main, the direction of movement being reversed when tut) combination of a gas main having a curved substantially as described.

\the drag reaches the end and contacts one of the arms33. The guide formed in the bottom of the main rigidly holds the drag in proper relation and at the same time. provides for the return'of the cable which may by this means be made endless instead of being wound upon a drum at each end of the main. The installation shown is simplified and it will be understood that in practice the same driving mechanism may be employed for dragging two or more adjacent gas mains by interconnecting the cables from the driving shafts.

I claim: v e

1. In a device of the class described, the combination of a gas main, an angular guide rigidly secured to the interior of said main, a drag adapted to be guided and limited in vertical and lateral movement thereby, and means for moving said drag and reversing the direction of movement thereof,

2. In a device of the class described, the

lower Wall, an angular guide extending from end to end of the main, a drag, the lower portion of which is shaped to correspond to the shape of the lower wall of the main, said drag being guided and limited in vertical and lateral movement by said ansaid drag, substantially as described.

3. In a device of the class described, the

combination of a gas main having partially open ends,.tar seals provided for said par tially open ends, a tar drag reciprocable in said main, an angular guide adapted to limit the verticaland lateral movement of the drag and an endless element connected to said drag and a prime mover and adapted to cause the reciprocation of said drag, sub stantially as described.

4C. In a device of the class described, the combination of a gas main, a guiding member providing an open space therein, a tar drag reciprocable on said guiding member, said drag being limited in it s.movement and caused to travel in a substantially fixed path by cooperation with said guiding member, and an endless cable connected to said drag, the return portion of said cable 0ccupying the space in said guiding member,

substantially as described.

Signed at Duluth, St. Louis county, Min.-

nesota, this 29 day of Mch., 1915.

SAMUEL B. SHELDON.

Witnesses: J. E. CARLSON,

EDWARb H. NINDQN.

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