US3696004A

US3696004A - Oscillating scraping mechanisms for coke oven jambs

Info

Publication number: US3696004A
Application number: US55127A
Authority: US
Inventors: Charles D Mccullough
Original assignee: Allied Chemical Corp
Current assignee: Krupp Wilputte Corp; Allied Corp
Priority date: 1970-07-15
Filing date: 1970-07-15
Publication date: 1972-10-03
Anticipated expiration: 1989-10-03

Abstract

IN APPARATUS FOR MECHANICALLY SCRAPING FORMED DEPOSITS FROM THE JAMB OF A COKE OVEN, AN OSCILLATING SCRAPING MECHANISM FOR SCRAPING SAID DEPOSITS FROM SUBSTANTIALLY RIGHT ANGULAR SURFACES EXTENDING ALONG EITHER THE JAMB TOP OR BOTTOM WALLS, AND ARCUATE CORNER PORTIONS CONTIGUOUS THEREWITH. THE MECHANISM FEATURES A SHAFT WHICH IS PROVIDED WITHIN A HOUSING AND HAS ONE END EXTENDING THEREFROM WITH A SCRAPER UNIT THEREON. IN RESPONSE TO THE OSCILLATION OF THE HOUSING, THE SHAFT RECIPROCATES LINEARLY IN FOLLOWING A CAM MEANS THEREBY RESULTING IN A SCRAPING OF SAID DEPOSITS.

Description

Oct. 3, 1972 Filed Julv 15, 1970 c. D M CULLOUGH 3,696,004

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS l0 Sheets-Sheet 1 5117. I770 C'U LIDLIG'H 1972 Q. 0- MCCULLOUGH OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 1970 10 Sheets-Sheet 2 Oct. 3, 1972 c D- M CULLQUGH 3,596,904

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 1970 1o Sheets-Sheet 5 Oct. 3, 1972 c MOCULLQUGH 7 3,696,004

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS 7 Filed Jul? 15, 1970 7 1O Sheets-Sheet 4 v Oct. 3, 1972 c. o. M CULLOUGH 3,

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMES Filed Jun 15, 1970 10 Sheets-Sheet 5 Oct. 3, 1972 MGCULLOUGH 3,696,004 I OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMES Fild Julv 15, 1970 10 Sheets-Sheet 6 1972 c. D. M CULLOUGH 3,696,904

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filid Julv 15, 1970 10 Sheets-Sheet '7 Oct. 3, 1972 c. D. M cuLLoucaH 3,

OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filed Julv 15, 1970 l0 Sheets-Sheet 8 l/ l l f O h o Oct. 3, 1972 c. D. MCCULLOUGH OSCILLATING SCRAPING MECHANISMS FOR COKE OVEN JAMBS Filid Jul-Y 15, 1970 10 Sheets-Sheet 9 I /20 W "Mn 'm In,

Oct. 3, 1972 c. D- M CULLOUGH 3,

OSCILLATING SCRA PING MECHANISMS FOR COKE OVEN JAMES Filed Julv 15, 1970 l0 Sheets-Sheet 1O United States Patent Office 3,696,004 Patented Oct. 3, 1972 US. Cl. 202241 21 Claims ABSTRACT OF THE DISCLOSURE In apparatus for mechanically scraping formed deposits from the jamb of a coke oven, an oscillating scraping mechanism for scraping said deposits from substantially right angular surfaces extending along either the jamb top of bottom walls, and arcuate corner portions contiguous therewith. The mechanism features a shaft which is provided within a housing and has one end extending therefrom with a scraper unit thereon. In response to the oscillation of the housing, the shaft reciprocates linearly in following a cam means thereby resulting in a scraping of said deposits.

BACKGROUND OF THE INVENTION Self-sealing doors doors for coke ovens have a sealing strip extending therearound which presents a knife edge to the machined face of the door jamb for sealing therewith. It is well known that, in order to be effective, the seal made between a self sealing coke oven door and its jamb must be gas tight and therefore depends upon the sealing surface therebetween being initially clean. Thus, due to the formation of deposits of a pitchy, carbonaceous nature along the sealing strip surface and jamb during the coking operation, it is necessary to periodically clean these surfaces, preferably after each coking operation.

Coke oven jamb cleaning has in the past generally been performed manually by scraping and chipping the deposits from the sealing surfaces. The cleaning performed in this manner is tedious and arduous work which is not efiiciently performed because of the prevailing heat conditions in the vicinity of the coke oven door jambs. Further, such cleaning results in uneconomically long shut-down of the coke ovens between charges and, additionally, the equipment used in scraping and chipping often mars the sealing jamb surfaces.

Various proposals have been made in the past for mechanically effecting the cleaning of the sealing surfaces of coke oven jambs, such as the use of mechanical scrapers. Such scrapers have not proved satisfactory due to wear characteristics on the sealing surfaces and their inability to meet self-cleaning requirements. Further, such scrapers were inefficient for scraping the top and bottom surfaces of the jamb, and the arcuate corner portions contiguous therewith.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an improved scraper mechanism in a jamb cleaner for scraping the top and bottom surfaces of a coke oven jamb, and the arcuate corner portions contiguous therewith.

Broadly, the invention is concerned with an oscillating scraper mechanism for scraping formed deposits from substantially right angular surfaces extending along the top or bottom walls of the jamb, and the arcuate corner portions contiguous therewith. The mechanism includes a frame and a first shaft rotatably mounted in the frame having one end connected to a housing. A second shaft, located within the housing, has one end extending therefrom which is connected to a scraper cutter unit capable of scraping right angular surfaces of the jamb wall and the arcuate corner portions. A cam follower connected to the second shaft travels about a cam having a configuration substantially similar to the jamb wall and contiguous corner portions, said cam follower travelling about the cam, in response to the oscillation of the first shaft, to impart linear reciprocating movement to the second shaft as the housing oscillates, thereby resulting in the scraper unit on the second shaft scraping the deposits from the jamb wall and contiguous corner portions.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects and a fuller understanding of the invention may be had by referring to the drawings in which:

FIG. 1 is a side view of the top half portion of the jamb cleaner;

FIG. 2 is a side view of the bottom half portion of the jamb cleaner;

FIG. 3 is a front view of the top half portion of the jamb cleaner;

FIG. 4 is a front view of the bottom half of the jamb cleaner;

FIG. 5 is a rear view of the bottom half portion of the jamb cleaner depicting the latching mechanism and carriage drive means;

FIG. 6 is a plan view of the left-hand side of the jamb cleaner depicting the carriage, and reciprocating linear scraper means in contact with the jamb;

FIG. 7, is a plan view of the right hand side of the jamb cleaner depicting the carriage, and reciprocating linear scraper means in contact with the jamb;

FIG. 8 depicts the relationship of FIGS. 6 and 7, respectively;

FIG. 9 is a partial cross-sectional view of the upper oscillating scraper mechanism;

FIG. 10 is a view taken along the line 10-40 of FIG. 9;

FIG. 11 is a front view of the primary and secondary heat-resistant shield assemblage;

FIG. 12 is a front view of a primary heat-resistant shield;

FIG. 13 is a front view of a secondary heat-resistant shield;

FIG. 14 depicts a portion of the frame for holding the heat-resistant shields;

FIG. 15 schematically illustrates the jamb cleaner in a position whereat the oscillating and linear scraping mechanisrns are midway between the top, bottom and side walls of the jamb during their scraping cycle;

FIG. 16 schematically illustrates the jamb cleaner whereat each of the oscillating and linear scraping mechanisms are at one end of their scraping cycle; and

FIG. 17 schematically illustrates the jamb cleaner whereat each of the oscillating and linear scraping mechanisms are at the other end of their scraping cycle.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring more particularly to FIGS. 1-5 of the drawings, there is depicted a jamb cleaner of the instant invention which is capable of cleaning a jamb located at either the coke side or pusher side of the battery. The jamb cleaner may be mounted on a movable control apparatus (not shown) having associated therewith a door extracting means, a pusher machine, a door cleaner, etc. or any combination thereof.

The jamb cleaner, includes a vertically extending main frame 10 of rectangular configuration having a top end 11, bottom end 12 and

sides

13, 14. Each of the

sides

13, 14 are provided with a plurality of brackets 15--15 mounted thereon by bolt means 1616, each bracket having extending portions 1717 (FIG. 6) projecting therefrom. A tube rail carriage 18 (FIGS. 3, 4 and 6) vertically extends along side 13 and, similarly, a tube rail carriage 19 vertically extends along side 14, each of said carriages being of substantially square cross-section and in parallel relationship to each other and main frame 10. The

tube rail carriages

18, 19 are similar; thus, for the sake of simplicity, it is to be understood that a description of tube rail carriage 18 and its related components will suffice for a description of tube rail carriage 19 and its related components.

As seen in FIG. 6, the far ends of extending portions 17--17 project slightly beyond the walls 18a, 18b of tube rail carriage 18, and fixedly positioned between the rear ends of said extending portions 1717 is a primary rotating guide roller 20 which is normally in contact with tube rail carriage wall 180, and said roller having flanged ends 2121 which partially envelop rail carriage walls 18a, 18b. The roller functions to guide tube rail carriage 18 vertically during its linear reciprocating movement, and to exert a pressure on scraper blades 25--25, to be described more in detail hereinafter.

A pair of

tracks

26a, 26b extend along the entire length of tube rail carriage walls 18a, 18b, respectively. Secondary rollers 27a, 27b are mounted on respective extensions 17a, 17b, which are connected to extending portions 1717 by conventional securing means 17c17c, said secondary roller rotationally traveling over

respective tracks

26a, 26b to positively insure that guide rail carriage 18 is normally positioned against primary roller 20.

A plurality of supports 30-30 are fixedly connected to tube rail carriage wall 18d at predetermined spaced intervals for supporting a plurality of shafts 3131 (FIGS. 1-4) which extend in axial relationship to each other and in parallel relationship with tube rail carriage 18. A plurality of substantially L-shaped blade units, generally referred to at 2525 (FIG. 6), are connected to shafts 3131 at predetermined spaced intervals, each blade unit having a cutting edge 25a and a cutting edge 25b for scraping undesired carbon-tar substances formed on outer surface 35a and inner surface 35b, respectively, of jamb 35. Torsion springs 3737 are coiled about shafts 31-31, each spring being connected at 37a to the shaft and at 37b to guide rail carriage 18 to hold the angle of the blade units in a first position such that each blade cutting edge 2511 faces jamb surface 35a for initially striking said jamb surface when the jamb cleaner is moved by conventional means (not shown) into position with respect to the jamb. Continued forward movement of the jamb cleaner causes each blade cutting edge 25a to exert a force against outer jamb surface 35a and, in turn, causes shafts 31-31 to rotate, thereby resulting in each blade cutting edge 25b engaging jamb surface 35b, thus causing the blade units to assume a second position such that a full contact of each blade cutting edge 25a, 25b is made with its respective jamb surface 35a, 35b.

Each of blade cutting edges 25a, 25b, as seen in FIG. 6, is attached to blade holders 40a, 4012, respectively, by securing means 41-41, such as the bolt-nut type, which are connected through elongated slots 42a-42a and 42b-42b of each cutting edge and holder, respectively. With this arrangement the blades may be adjustably positioned for contact with the jamb. Further, the cutting edges 25a, 25b may be quickly and easily replaced, when worn or damaged, simply by disassembling the securing means 41-41 when the cleaner is in the retracted position.

A pair of springs 43a43a and 43b-43b each are positioned within its respective holder to normally urge its blade cutting edge outwardly therefrom and provide sufficient tension through the blades against the jamb. Consequently, during a scraping operation, the cutting edges are enabled to scrape various irregular deposits of coal-tar substances formed on the jamb.

A pair of fluid operated cylinders 45-45 (FIGS. 2, 4 and are mounted on the main frame and provided with respective pistons 45a, 45b whose ends 46a, 46b are connected by conventional fastening means 47a, 47b to guide

rail carriages

18, 19, respectively. A conventional 4-way valve, generally referred to at 48, causes the cylinders to operate in an opposing reciprocating linear relationship when the cylinders are activated by means (not shown). Thus, when the jamb cleaner is in position with respect to the jamb for a scraping operation, as piston 45a extends it causes guide rail carriage 18 and, in turn, scraper blade units 2525 associated therewith to move and scrape its respective jamb surfaces 35a, 35b, in an upwardly direction. Simultaneosuly, piston 45b retracts and causes guide rail carriage 19 and, in turn, scaper blade units 25--25 associated therewith to move and scrape its respective jamb surfaces 35a, 35b in a downwardly direction. As a result the top right half portion and the bottom left half portion of the jamb is cleaned. After piston 45a is fully extended and piston 45b is fully retracted, valve 48 causes each piston to move in the opposite direction thereby resulting in carriage 18 moving downwardly and carriage 19 moving upwardly causing the blade units thereon to clean the bottom right hand portion and top left hand portion of the jamb, respectively. The scraper blade units 2525 are so spaced from each other and the extension of travel of each piston is such that each blade unit slightly overlaps the area of travel of a succeeding blade unit by approximately two to three inches to insure that the total surface area of the jambs side surfaces are totally scraped.

After a scraping operation, further described in detail hereinafter, as the jamb cleaner retracts from the jamb, torsion springs 37-37 are caused to unwind to their normal rest position thus permitting shaft 31-3 1 to rotate in the opposite direction and, in turn, pivotally return and hold the blade units 2525 in their normally inward first position with respect to the jamb.

As seen in FIGS. 1-4, a chain 50 interconnects the top ends of

guide rail carriages

18, 19 by conventional attaching means 51-51 and, similarly, a chain 52 interconnects the bottom ends of said guide rail carriages by conventional attaching means 5353, said chains respectively driving upper and lower oscillating head mechanisms 55, 56 (now to be described) for scraping the carbon-tar deposits located on the arcuate corners and top and bottom surfaces of the jamb.

As more particularly depicted in FIGS. 1, 3 and 9, oscillating

head mechanisms

55 and 56 are substantially similar in structure and function; accordingly, the description of one will suflice for the other. The oscillating head mechanism (FIG. 9) includes a shaft 60 which is rotationally mounted at one end in main frame 10 by mounting means, generally referred to at 61, the other end of said shaft being welded at 62 to a housing '63. A sprocket 64, for driving chain 50, is connected about shaft 60 on one side by a fastener plate 65 and screws 66-66, and on the other side by a back-up ring 67 which is welded to the sprocket at 68.

Located within a housing 63a (FIG. 9), which is threadedly connected to housing 63 by coupling 69, is a rectangularly shaped shaft 70 having a threaded end 71 with a spring 72 coiled thereabout. One end of the spring is in contact with an internally disposed blocking surface 73 of the housing and the other end of the spring is in contact with a plate 74 associated with nut means 75 which are threadedly connected to end 71 for adjusting the desired tension on the shaft. Shaft 70 is provided with a pair of an arm 81 connected to shaft 70 and having a blade holder 83 for holding blade 84 which is removably connected thereto by fastening means 85-85. A spring 86 is coiled about arm 81 to insure and maintain the application of sufiicient tension through blade 84 against outer jamb surface 86a for scraping various irregular deposits from the jamb surface.

Also loctaed at the far end of shaft 70 is a blade cutting unit, generally referred to at 90, which includes a connecting member 91 attached to shaft 70 at 92-92 and having an arm 93 connected to blade holder 94 for holding blade 95 which is removably connected thereto by fastening means 96-96. A spring 97 is coiled about arm 93 to insure and maintain the application of sufficient tension through blade 95 against inner jamb surface 86b to permit the blade to scrape the various irregular deposits from the jamb surface.

Also located near the far end of shaft 70 is a cam roller 100 for following an inverted U-shaped cam track 101 (FIGS. 3 and 9) affixed to the top end of main frame and having a configuration similar to but preferably smaller than the top and corner portions of the jamb. It is to be noted that while the U-shaped cam track 101 (FIG. 3) at the top of the frame is inverted, a similar U-shaped cam 102 (FIG. 4) located at the bottom end of the frame and cooperatively associated with oscillating head mechanism 56 is not inverted and has a configuration similar to but preferably smaller than the bottom and corner portions of the jamb.

As chain 50 is driven in response to the movement of

carriages

18 and 19, roller 100 follows cam track 101 causing

blades

84 and 95 to scrape the carbon-tar substances located in their paths as they travel from one top corner portion of the jamb and along its top surface to the other top corner portion thereof. As roller 100 travels towards and over the arcuate corner portions 101a (FIG. 3) of track 101, shaft 70 is moved linearly under spring tension within housing 63a to permit

blade cutting units

80 and 90 to advance to the corresponding surface areas of the jam-b and effectively scrape the carbon-tar substances therefrom. As roller 100 travels towards and over the mid-section 101b of the cam track, shaft 70 reciprocates linearly in the opposite direction to permit the blade cutting units to scrape the corresponding surface area of the jamb. During the linear reciprocating movement of shaft 70, lateral movement of the shaft is substantially prevented by cam rollers 77-77, previously described.

The aforesaid vital components of the jamb cleaner are protected against the intense heat emanating from the oven, when the jamb cleaner is in position for scraping the jamb, by a plurality of primary heat-resistant shields 110-110 (FIGS. 1, 2, 11, 12 and 13) which are successively vertically aligned and extend substantially the length of the cleaner. The primary shields 110-110 are constructed of a heat-resistant material, such as stainless steel or Iconel, and are connected to a vertically extending frame 111 by bolts 1112-112 passing through supporting member 113, said vertically extending frame being connected to main frame .10 by brackets 114-114. The shields may be any desired configuration, preferably square or rectangular, and are of a width approximately equal to the width of the oven opening.

A gap or space 115-115, of about 1 inch or more, is provided between each successive shield 110 to provide a free area of movement for the shields as they expand due to their exposure to the intense heat of the oven, thereby preventing a warping or buckling of said shields. Secondary heat shields 1'16-116 (FIGS. 1 and 13), constructed of a material similar to the primary shields and preferably of rectangular configuration, are located in an area slightly behind the gaps 115-115 of the primary shields and are connected to frame 111 by bolts 117-117 passing through supporting members 118-118.

As seen in FIGS. 12 and 13, each of the primary and secondary heat shields are respectively provided with at least one

elongated slot

120, 121 through which the bolts respectively pass for connecting the shields to frame 111. The bolts are not tightly fastened against the elongated slots in order to permit freedom of movement of the shields, via the elongated slots, during heat expansion thereof. In this manner buckling or warping of the shields are prevented. Each of the shields 110, 4116 also are respectively provided with at least one relatively

smaller diameter opening

122, 123 for receiving the bolts for securing the shields more tightly to frame 111. Finally, as seen in FIG. 14, supporting brackets 114 also are provided with elongated slots 125-125 for receiving bolts for securing the heat shield frame thereto, said slots providing the necessary area for movement of the frame in response to any heat expansion thereof.

In operation, the jamb cleaner is moved towards the oven opening by conventional moving means (not shown). As the jamb cleaner approaches the jamb, guide rollers -130 (FIG. 4) located near the mid-portion of the cleaner and projecting from

sides

13 and 14 respectively, engage fixed guides (not shown) extending from the external surface of the oven wall. As rollers 130-130 ride over the guides, the jamb cleaner becomes vertically aligned with the jamb. A tapered alignment arm 131 (FIG. 1) located at the top of the cleaner engages a complementary V-shaped slotted member (not shown) located at the top external surface of the oven and, simultaneously, a V-shaped slotted member 132 (FIG. 2) located at the bottom of the cleaner engages a nib (not shown) projecting from the bottom external surface of the oven, thereby permitting the cleaner to be not only more positively aligned with the jamb but also to secure it from lateral movement during operation of the cleaner. Forward movement of the jamb cleaner is finally stopped when a pair of upper stops 133-133 (FIG. 3) and a pair of lower stops 134-134 (FIG. 4), each of the pairs being located on the front of the cleaner, make full contact with the external surface of the oven thereby indicating that the cleaner is oriented with respect to the jamb.

A latching mechanism (FIG. 5), generally referred to at 135, includes a fluid operated cylinder 136 and piston 137 which is pivotally connected at 138 to a lever 139 pivotally mounted at 140. When the jamb cleaner is in ready position with respect to the jamb, it is positively secured to the oven front by actuating cylinder 136 which causes lever 139 to partially rotate clockwise until lever ends 139a-139a engage and become locked in opposing looped lugs (not shown) extending from the external surface of the oven, thereby not only finally orienting the cleaner with the jamb but also securely locking the cleaner to prevent movement of the cleaner frame during the scraping operation.

As schematically illustrated in FIGS. 15, 16 and 17, the jamb cleaner is shown in varying positions during a scraping cycle. In FIG. 15, it can be assumed that the jamb cleaner is in a start position whereat tube rail carriages 18 and I19 are located approximately along the mid-sections of the jamb side walls, and upper and lower

oscillating head mechanisms

55 and 56 are located approximately along the mid-sections of the top and bottom walls, respectively, of the jamb.

As seen in FIG. 16, upon actuation of cylinders 45-45, piston 45a extends to move carriage 18 upwardly which, in turn, drives chain 50 to rotate upper oscillating head mechanism 55 clockwise, thereby permitting the scraper blades associated therewith to scrape the carbon-tar substances from the adjacently disposed top surface of the jamb and the arcuate corner portion contiguous therewith, whereat the scraper units stop when said piston is fully extended. Simultaneously with and similarly to the aforesaid movement, piston 45b retracts and moves carriage 19 downwardly and, in turn, drives chain 52 to rotate lower oscillating head mechanism 56 clockwise, thereby permitting the scraping blades associated therewith to scrape the carbon-tar substances from the adjacently disposed bot- 7 tom surface of the jamb and the arcuate corner portions contiguous therewith.

As seen in FIG. 17, piston 45a has retracted and piston 45b has extended which, in turn, caused

carriages

18, 19 and oscillating

head mechanisms

55, 56 to move in the opposite directions to the other ends of their respective jamb surfaces, the scraping units thereon scraping the carbon-tar deposits in their paths. When

carriages

18, 19 and oscillating

head mechanisms

55, 56 have reached the other ends of their respective paths, the cycle may be repeated to insure removal of all the carbon-tar deposits from the surfaces of the j amb.

I claim:

1. In apparatus for mechanically scraping formed deposits from the jamb of a coke oven, an oscillating scraping mechanism for scraping said deposits from substantially right angular surfaces extending along either the jamb top or bottom walls and arcuate corner portions contiguous therewith, which comprises:

a frame,

a first shaft rotatably mounted in the frame and having one end extending therefrom,

a housing connected to said one end of the first shaft,

a second shaft located within said housing and having one end extending therefrom,

a scraper cutting unit connected to said one end of the second shaft and capable of scraping right angular surfaces of the jamb wall and arcuate corner portions contiguous therewith,

a cam having a configuration substantially similar to the jamb wall and arcuate corner portions contiguous therewith,

a cam follower connected to the second shaft for travel about the cam, and

means for rotationally oscillating said first shaft within predetermined uniform limits of travel, thereby causing the cam follower to travel about the cam and correspondingly impart linear reciprocating movement to the second shaft as the housing oscillates rotationally with said first shaft, thereby resulting in the scraper unit on said second shaft scraping the deposits formed on the jamb wall and the arcuate corner portions contiguous therewith.

2. In apparatus according to claim 1, wherein the cam is a substantially U-shaped member having a configuration substantially similar to the bottom wall of the jamb and arcuate corner portions contiguous therewith, and the cam follower is a roller in communication with said cam.

3. In apparatus according to claim 1, wherein the cam is a substantially inverted :U-shaped member having a configuration substantially similar to the top wall of the jamb and arcuate corner portions contiguous therewith, and the cam follower is a roller in communication with said cam.

4. In apparatus, according to claim 1, wherein the other end of the second shaft is located within the housing and is provided with resilient means cooperatively associated with the inner surface of said housing for applying sufiicient tension on said second shaft during its linear reciprocating movement.

5. In apparatus, according to claim 4, wherein:

adjustable means are provided on said other end of the second shaft for regulating the tension exerted by the resilient means.

6. In apparatus, according to claim 4, wherein:

cam means are provided in the housing for contact with the second shaft to prevent lateral movement of said second shaft during its linear reciprocating movement.

7. In apparatus, according to claim 6, wherein the cam means includes:

a pair of longitudinal recessed ways located on opposing surfaces of said second shaft, and

at least one pair of cam rollers fixedly located within 8 the housing and rotatable upon its own axis in contact with said recessed ways.

8. In apparatus, according to claim 4, wherein said scraping cutting unit includes:

a holder connected to said second shaft,

a pair of blades in substantially right angular relationship to each other extending from said holder for communication with the jamb surface to be scraped, and

resilient means located within the holder for imparting sutficient tension upon the blades against the jamb surface, thereby enabling the blades to scrape irregularly formed deposits thereon.

9. In apparatus, according to claim 8, wherein the blades are provided with removable, adjustable means for adjusting the blades with respect to the blade holder.

10. In apparatus, according to claim 9, wherein the blade holder is comprised of individual housings for each blade.

11. In apparatus for mechanically scraping formed deposits from the jamb of a coke oven, a scraping unit including an upper oscillating scraping mechanism for scraping deposits from substantially right angular surfaces of the top wall and arcuate corner portions contiguous therewith, and a lower oscillating scraping mechanism for scraping deposits from substantially right angular surfaces of the bottom wall and arcuate corner portions contiguous therewith, which comprises:

a frame,

each of said upper and lower oscillating mechanisms including a first shaft rotatably mounted in the frame and having one end extending therefrom, a housing connected to said one end of the first shaft, a second shaft located within said housing and having one end extending therefrom, a scraper cutting unit connected to said one end of the second shaft and capable of scraping right angular surfaces of the jamb wall and arcuate corner portions contiguous therewith, a cam cooperatively associated with the frame and having a configuration substantially similar to the jamb wall and arcuate corner portions contiguous therewith, and a cam follower connected to the second shaft for travel about the cam,

means for simultaneously rotating said first shafts alternately in opposite directions within predetermined uniform limits of travel, thereby causing the cam followers of each mechanism to travel about its respective cam and correspondingly impart linear reciprocating movement to the respective second shafts as the housings oscillate rotarily with said first shafts, thereby resulting in the respective scraper units of the upper and lower oscillating mechanisms scraping the formed deposits from the top and bottom wall surfacgs, and arcuate corner portions contiguous therewit 12 In apparatus according to claim 11 wherein the rotating means includes:

a sprocket connected to each of the first shafts,

a chain cooperatively associated with the teeth of each sprocket, and

means for driving said chain a predetermined distance alternately in opposite directions to cause the upper and lower oscillating mechanisms to oscillate in opposing reciprocating relationship with each other, said predetermined distance being that distance necessary to move the mechanisms a distance equal to the length of said wall and contiguous arcuate corner portions desired to be scraped.

13. In apparatus, according to claim 11, wherein the cam for the lower mechanism is of U-shaped configuration and the cam for the upper mechanism is of an inverted U-shaped con-figuration, and

said cam, followers are rollers for each respective cam.

14. In apparatus, according to claim 11, wherein the other end of each second shaft is located within the hous- 9 ing and provided with resilient means cooperatively associated with its respective housing inner surface for applying tension on said second shafts during their linear reciprocating movements.

15. In apparatus, according to claim 14, wherein adjustable means are provided on each of the other ends of the second shafts for regulating the tension exerted by the resilient means.

16. In apparatus, according to claim 14, wherein cam means are provided in each housing for contact with each of the second shafts to prevent lateral movement of said second shafts during their linear reciprocating movement.

17. In apparatus, according to claim 16, wherein the cam means includes:

a pair of longitudinal recessed Ways located on opposing surfaces of each of said first shafts, and

at least one pair of cam rollers fixedly located within each housing and rotatable upon its own axis in contact with said recessed Ways.

18. In apparatus, according to claim 14, wherein each of said scraping cutting units includes:

a holder connected to said second shaft,

resilient means located within the holder for imparting sufficient tension upon the blades against the jamb surface, thereby enabling the blades to scrape irregularly formed deposits thereon.

19. In apparatus, according to claim 18, wherein the blades are provided with removable, adjustable means for adjusting the blades with respect to the blade holder.

20. In apparatus, according to claim 19, wherein the blade holder is comprised of individual housing for each blade.

21. In apparatus for mechanically scraping formed de' posits from the jamb of a coke oven, a scraping unit including an upper oscillating scraping mechanism for scraping deposits from substantially right angular surfaces of the top wall and arcuate corner portions contiguous therewith, and a lower oscillating scraping mechanism for scraping deposits from substantially right angular surfaces of the bottom wall and arcuate corner portions contiguous therewith, which comprises:

a frame;

each of said upper and lower oscillating mechanisms including a first shaft rotatably mounted in the frame and having one end extending therefrom; a housing connected to said one end of the first shaft; a second shaft located within said housing and having one end extending therefrom; resilient means cooperatively associated with the other end of said second shaft; adjustable means for adjusting the resilient means; a scraper cutting unit connected to said one end of the second shaft, said scraper cutting unit including a holder having cutting blades removably mounted in said holder and located in substantially right angular relationship to each other, and resilient means urging said blades outwardly from the holder, said cutting blades of each mechanism being capable of scraping right angular surfaces of the respective top and bottom surfaces of the jamb and arcuate corner portions contiguous therewith;

an inverted U-shaped cam connected to the upper part of the frame;

a =U-shaped cam connected to the lower part of the frame;

a cam roller connected to each of said second shafts for travel about its respective cam;

a sprocket connected to each of the first shafts,

a chain cooperatively associated with the teeth of each sprocket, and

means for driving said chain reciprocatively a predetermined distance to cause each of the first shafts to rotate in opposite directions and, in turn, cause the cam rollers of each mechanism to travel about its respective cam and impart linear reciprocating movement to its respective second shafts as the housings oscillate with said first shafts, thereby causing the respective scraper units of the upper and lower mechanisms to scrape the deposits formed on the respective top and bottom Wall surfaces and arcuate corner portions contiguous therewith, said predetermined distance being that distance necessary to move the mechanisms a distance equal to the length of each said wall and contiguous arcuate portions desired to be scraped.

References Cited UNITED STATES PATENTS 3,526,013 9/1970 Kato 15-93 A FOREIGN PATENTS 867,761 5/1961 Great Britain 202-241 NORMAN YUDKOFF, Primary Examiner D. EDWARDS, Assistant Examiner US. Cl. X.R. 15-93 A