US1259165A

US1259165A - Automatic blocking mechanism for strip-mills.

Info

Publication number: US1259165A
Application number: US10804016A
Authority: US
Inventors: August Sundh
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-07
Filing date: 1916-07-07
Publication date: 1918-03-12
Anticipated expiration: 1935-03-12

Description

A. SUNDH. AUTOMATIC BLOCKING MECHANISM FOR STRIP MILLS APPLICATION rlLED JULY]. i916- Patented Mar. 12, 1918.

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AUTOMATIC BLOCKING MECHANISM I'OR STRIP MILLS.

APPLICATION FILED .IULY 1| I9l8- Patented Mar. 12, 1918.

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l IIII AUGUST SUNDH, or I-IASTINGS-UPON-HUDSON', NEW YonK.

AUTOMATIC BLOCKING MECHANISM FOR STRIP-MILLS.

Application filed July 7, 1916. Serial No. 108,040.

Mills, of which the following is'a specifica-" tion.

My inventionrelates to an improvement in automatic blocking mechanism for strip mills.

It has been the practice inapparatus of this nature to have a man stand at the block who clamps the strips upon signal from the man Who feeds the strips of metal to the rolling mill. This is bad practice, for

should the man at the rolling mill forget to signal the man at the block, or should he start another strip through before the man at the block is ready for it, that is before he has the block reset in position to receive the strip, the strip will run out over the floor and have to be cut H anda portion of it wasted. I have provided an apparatus, however, to avoid these defects, inasmuch as the man at the rolling mill has entire charge of the blocking apparatus, from the time the strip is fed by himto the rolling until it is completely blocked and ready to be removed from the block. This operator adj uststhe guiding mechanism for the strips, the clamping mechanism to clamp the strip when the latter has reached a position to be clamped, and after it has been clamped and the strip blocked this same operator stops the block, and releases the' clamping mechanism so that the blocked strip may be removed; With my apparatus the strip itself in its passage'through the guides automatically gives notice to the operator that it has progressed sufficiently through the guides for the operator to set into operation theclamping mechanism, release the brake, etc. As the man at'the rolling mill is the man who feeds thestrips to the rolling mill,it will be seen that there 1s' no possibility of misunderstood signals or neglect to give a signal at all, and that there is no waste of time through one man waiting on the other, as with the machines now in use. All of these things tend of course to a larger output of the mill. and as the operator does not have to handle the strips after they have once been started through the rolling mill there is no danger to the operator. With my device strips of varying thicknesses may be blocked with the one Specification of Letters Batent. Patented Mair, 12, 1918. I

block and non-magnetic as well as magnetic strips.

Briefly I have provided a block made in sect ons, and having an outside cylindrical sectional casing. The inside of the block is constructed to be expanded to clamp the strip between it and the outside casing, and the outside casing is made collapsible to facilitate removal of the strip from the block after the blocking operation has been completed. I have provided guiding mechanism for the strips, a brake for the outside or shell of the block, and means to operate the clamping mechanism, all controlled from a central point, which is within reach of the man at the rolling mill; and he is given a signal bythe strip when it has reached a certain predetermined point in its travel through the guides, that it has reached that point, and he then operates the mechanism which I have just mentioned as being under his control. -The operator has full control of the machine, setting it, starting it in operation and stopping it.

Referring now to the drawings accompanying this description, andwhich illustrate my invention: Figure 1 is a plan view of the whole machine with part of the machine in cross section, and showing the position taken bythe various parts of the apparatus during the blocking operatioma strip being shown partially blocked; Fig. 2 is a longitudinal section of the block, and Fig. 3 is anend view partly in section of the block showing the'structure of the outside shell or casing of the block.

Referring to the drawings in detail: An

electric motor M is shown as furnishing the motive power for the apparatus, its armature shaft being belted or geared in. any suitable way to a main drive shaft 1 mounted for rotation in

bearings

2, 2. Carried within the drive shaft. which is'hollow, is a shaft3. this shaft projecting beyond the end of the drive shaft 1, to the outer end of the block. With my apparatus the motor M may be intermittently or constantly rotated, just as desired. The driving connection between the drive shaft 1 and the shaft 3. comprises a pulley 4 mounted to always rotate with the shaft 1, but slidable longitudinally thereon. this member 4 having a slot and pin connection with the shaft 3. A lever 5 is provided pivoted at the. point 6 and having a yoke 7 engaging a groove inthe peripheryof the pulley 4. Movement of this lever about its pivot 6 will slide the pulley 4 longitudinally of the shaft 1, and will also cause a longitudinal movement of the shaft 3. At the outer end of the shaft 3 istoggle mechanism, comprising members 8 and 9 telescoping into each other and carrying springs 10. The members 8 are secured to the shaft 3 by means of pivots 11, while the members 9 are secured to the'sections 12 of the inside of the block, these sections extending longittdinally of the block, and pivoted at their other end by pivots 13 to a. rotatable member 14 which is mounted on the member 15 forming'a bearing-for the shaft 3. The members 8 and 9 have a slot and pin connection with each other so that as the shaft 3 is moved longitudinally the members 8 will not be pulled out of the members 9. The outside of the block which is sectional, as I have already noted, comprises several are shaped sections 18, I have shown three, and when these sections are in place the periphery of the block will be circular. One of thesesections I rigidly secure to a brake pulley 19, the latter mounted for rotation on the member 15. The sections 18 are hinged together at 20, and between adjacent ends of any two of the sections I provide a slot 21, this slot extending the entire length of the block from the outside end to the brake pulley 19, this slot being provided for the purpose of allowing the strip to'enter to the inside of the block. In order to insure a circular periphery of the block when the same is attached to the strip, I provide a spring 22 between one of the sections 18 and the bearing 15, this spring being merely strong enough to prevent this section collapsing; it will be understood of course that the other sections will be held out by the operation of .the inside mechanism of the block already described.

I shall now describe the braking mechanism, the guiding mechanism, and the mechanism for operating the brake and guides, and also the mechanism already described. The'guides of which there are two, comprise two plates or troughs forming an upper and lower guide member being located one above and'one beneath the strip as it is fed from the'rolling mill. The upper guide member is designated 23 and the lower member 24. The guides are mounted for movement about a pivot 25. A longitudinal slot 26 is cut in each guide. Carried by the upper guide member 23-is a pivoted arm 27 which extends directly over the slot 26, and carries at its outer end a roller 28, which extends through the slot in the upper guide member sufliciently far to be engaged by the strip 9 in-its passage from the rolling mill through the guides. end of the guides adjacent the rolling mill angle.

Plates 29,are provided at the gagement with the rolling mill, for the purpose of scraping the strips from the rolls, and serving also to guide the strips until they reach the guide members 23 and 24. To one side of the guides I have provided electromagnets 30 and 31, in a common casing C. These electromagnets receive their power from a common source of supply designated S, but are controlled by

separate switches

32 and 33, respectively. A core 34 is provided. for the magnet 31, the end of this core which projects from the casing C carrying a stilt coil spring 35 adjusted on the core by means of a nut 36. The extreme outer end of the core 34 is pivoted to the ends of

links

37 and 38 atthe point 39, the other end of the lever 37 being connected to the ,member 5 which is connected to the -member 41. Also pivoted at 40 is the brake for the block, this brake comprising an arm 42, having one end beveled and adapted to engage the part 19 of the block, its other end being engaged by one end of. a coil spring 43, the other end of which spring engages an arm 44 on the link 38. Adjusting means 45 are provided to engage the member 42 to adjust the same to the proper The end of the lever 42 which engages the member 19 of the block is so beveled that it may be swung in and out of engagement with the member 19, and engage a slot 46 cut in the said member, this slot being so positioned that when the lever 42 engages it the slot 21 in the outer part of the block willbe in position to receive the strip coming from the rolling mill. One end-of a rod 47 is carried on the pivot 39 this member being hollow at one end and receiving the end of a rod 48, the other end being pivoted to an extension 49 formed on the guide members 23 and 24. The members 47 and 48 have a slot and pin connection with each other. A shoulder 50 is formed on the member 47 and a shoulder 51 is formed on the member 48, and a coil spring 52 surrounds both members 47 and 48 between these two shoulders. A core 53 is provided for the magnet 30 having a shoulder 54 near its outer end and surrounded by a coil spring 55 between this shoulder and the end of the casing (l. Pivoted at the extreme outer end of the core 53 is a link 56, the other end of this link being pivoted to an arm 57 which may be secured to the casing C of the magnets or any other convenient place. The end of the link 56 pivoted to the core 53 is beveled, and likewise the end-of the lever 5 with which the beveled end of the link 56 engages.

Carried by the rolling mill is an electric lamp 58 receiving current from a battery B, one side of which is grounded on the rolling mill, and the other side connected sends current through the magnet 31 and the same will begin to draw in its core 34. Or the operator may wait until the lamp atfixed tov the rolling millis extinguished by the strip riding ofi the roller 28 before he closes the switch 33. The drawing in of the core 34 compresses the spring 35 by reason of the latter having one end abutting the casing C and its other endabutting the member 36 screwed on the core; The toggle formed by the

links

37 and 38 will straighten out, carrying the member 5 upwardly as viewed in Fig. 1 to collapse the inside of the block and to move upwardly also the brake member 42 to cause the same to engage the outside of the block to bring the same to rest with the end of the member engaging the slot 46 formed in the member 19 of the block. The rods 47 and 48 will also be retracted and swing the guides 23 and 24L about the pivot 25 until they have been swung around to f ull guiding position, that is, in a straight lmefrom the rolling mill to the block. The operator may now remove his .hand from, the switch 33 and the same will open by reason of the small spring 59 which surrounds the stem of the switch. As the'member 5 wasmoved.upwardly through the operation just described. its beveled end forced inwardly the core 53 of the magnet 30 against the action of the spring-55 carried by the said core. The parts are so'adjusted that the lever 5 will be moved upwardly a sufficient distance to cause it to ride by the end of the link 56 and the core 55 wilLthen snap out under the action of the spring 55, and slide beneath the lever 5. As the under side of the member 5 is straight and the upper side of the link 56, it will be seen that when the opera-, tor removes his hand from the switch 33 the parts will be locked in position with the brake on, the guides in guiding position and the inside ofthe block collapsed. After the blocked strip has been removed from the block. the operator back of the rolling mill feeds another. strip to the mill, and as the strip reaches the roller 28, the lamp 58 is lighted, and the operator then operates the switch 32 to send current from-the supply S through the winding of the magnet 30. This magnet draws in its core against the action of the spring 55 until the lever 5 may snap down by the end of the core 53, due to the action of the spring 35, which it will be remembered was placed under compression by the action of the electromagnet link 56 the clamping mechanism ieoperated by the expanding of the inside of the block to clamp the strip to the block, the guides are withdrawn from guiding position, and the brake taken ofi'. Of course it will be understood that it takes time for the magnet.30 to move its core and for the spring 35 to overcome the inertia of all the parts of the mechanism, and I position the roller 28 so that by the time all these parts have operated by reason of-the operator operating the switch 32 the strip will have entered the opening 21 in the block and be in position to be clamped between the inside expanding mechanism of the block and the inside of the outer shell or casing of the block.

The toggle mechanism in the inside of the block is so arranged that it will, be straightened out when the strip is clamped, consequently the clamping mechanism is in efl'ect locked. It is obvious that with this arrangementtand the springs strips of varying thicknesses may be clamped and blocked with the one block.

I do not desire to be limited to the exact details and arrangement of parts herein disclosed, as" others skilled in the art might. make various changes therein without departing from the spirit and scope of the invention.

WhatI claim, and desire to secure by Letters Patent of the United States is 1, In blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means whereby the strip is attached to the block when it reaches the block, means for retaining said '70 31. As the lever 5 snaps by the end of the 2. In blocking mechamsm adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means whereby the strip is attached to the block when it reaches theblock, means for retaining said strip attaching means in inoperative position, and manually controlled means for operating said retaining means to releasing position.

3. In blocking mechanism adapted to wind a strip comin from a strip mill, the combination of a rotatable block. means whereby the strip .is attached to the block whe it reaches the block, means -for..retainin said strip attaching means in inoperative position; an actuating device for controlling said strip attachingvmeans. manual means for controlling said actuating device, and

the means for retaining said strip-attaching means in inoperative position and means controlled by the feeding movement of the strip to indicate the proper instant when I the manual means is to be operated.

4. In'blocking mechanism adapted to wind a strip coming from a strip mill, the com.-

bination of a rotatable block, guiding means between the strip mill and the block, mechanism for attaching the stripto the block when the same has reached the block, means to actuate saidmechanism to clamp the strip, means for returning the actuating mechanism to inoperative position, means for retaining the actuating mechanism in.

inoperative position, and a magnet for operating the retaining means to releasing position. 1

5. Inblocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means to rotate said block, means to clamp the strip to the block, and a spring-operated toggle joint for actuating the clamping means to clamp the strip.

6, In blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means to rotate said block, means to clamp the strip to the block, a spring-operated toggle joint for actuating the clamping means to clamp the strip, means to hold the said toggle joint in inoperative position, and electroresponsive means for actuating said holding means to release the toggle joint. 4

7. In blocking mechanism adapted to windclamping the strip to the block embodied in said block, a non-rotatable toggle joint connected with and for operating said clamping mechanism, actuating means for said toggle joint, and means controlling said actuating means. l

9. In blocking mechanism adapted towind a strip coming from a strip mill, the com-- bination of a rotatable block, a driving means for the block. a hollow shaft connectingsaid block and driving means, means embodied in the block for attaching the strip to the block, a stationary actuating device embodying a toggle joint. for operating the clamping means, and means in the hollow shaft for connecting the stationary actuating device and Said clamping means.

attaching the strip to the block, electroresponsive means for developing power to v operate said strip attaching means, electroresponsive means for preventing the release of said power to operate the strip attaching means, and means controlling said lastnamed electroresponsive means to cause the same to release the power developed by the first-na med electroresponsive means to cause the strip-attaching means to operate.

11. In blocking mechanism adapted to wind a strip coming froma strip mill, the combination of a rotatable block, means for attaching the strip to the block, means for developing power to operate said strip attaching means, electroresponsive means for preventing the release of said power, and means controlling said electro-responsive 1 means to cause the same to release the said power to cause it to operate the strip attaching means.

12. In blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means for attachingthe stripto the block, means for developing power to operate said strip-attaching means, separate means for preventing the release of said power, and manual means for controlling separately the'means for developing power and the means for preventing the release of said power.

13. In blocking mechanism adapted to 100 wind a strip coming from a strip mill, the combination of a rotatable block, means for attaching the strip to the block," actuating means therefor, and means for controlling said actuating means the momentary operation of which will release the actuating means to cause it to operate the strip attachmg means to cause the strip to be attached to the block and wound thereon.

14. In blocking mechanism adapted to wind a strip coming from a strip, mill, the

combination of a rotatable block. means whereby the strip is attached to the block when it reaches the block, a remote means controlling said strip-attaching means,manual means for'controlling said remote means, and an indicator, automatically controlled by the feeding movement of the strip indicating the time at which the manual means is to be operated.

15. In blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means whereby the strip is attached to the block when the same reaches the block, guiding means for guiding the stri from the'strip mill to the block, means or automatically Withdrawing said'guiding means after the strip is attached to the block. and a remote controlling means for controlling said str1p-.

mamas attaching' means and for controlling said guide-withdrawing means.

16.1 In a blocking mechanism adapted to ,wind a strip coming from a strip mill the combination of a rotatable block embodying a rotatable part and an initially stationary part, a brake for said stationary part, guiding means for guiding the strip from the strip mill to the block, means to expand the' rotatable part toward said stationary part to clamp the strip between said rotatable expandible part and the stationary part, and an electric remote controlling means for controlling said rotatable part, stationary part and the brake.

17. In a blocking mechanism adapted towind a strip coming from a strip mill, the combination of a rotatable block, means whereby the strip is attached to the block when the same reaches the block, guiding means for guiding the strip from the strip mill to the block, means for automatically withdrawing said guiding means after the strip is attached to the block, remote controllin means for contrdlling said strip- -attach1ng means and said guide-withdrawing means, circuit closers in the remote controlling m eans adapted to be manually operated to control the remote controlling means, and an indicating device controlled by the feeding movement of the strip for indicating the time at which the circuit closers should be operated 18. In a blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying a rotatable part and an initially stationary part, a brake for said stationary part, guiding means for guiding the strip from the strip mill to the block, means to expand the rotatable part against said stationary part to clamp the strip between said rotatable expandible part and the stationary part, electric remote controlling means for controlling said rotatable part, stationary part and brake, and a manually. operated circuitclosing means in the remote controlling means for controlling the remote controlling means, and an indicating device controlled by the feeding movement of the strip, for indicating the proper time when to operate said circuit closers. Y

19. In a blocking mechanism adapted to wind a strip coming'from a strip mill, the combination of a rotating block mechanism, a block comprising a rotating part and an initially stationary part, a brake for holdin the stationary part at rest, 'means to guide the strip from the strip mill to the block between said rotatlng part and said stationary part, and an automatic mechanical device for relieving the brake and allowing the stationary part to revolve with the rotating part, after the strip has entered be tween the rotating part and stationary part.

20. In a blocking mechanism adapted to Wind a strip coming from a strip mill, the combination of a rotating block mechanism, a' block comprising a rotating part and an initially stationary part, a brake for holding the stationary part at rest, means to guide the strip from the strip mill to the block between said rotating part and the stationary part, an automatic mechanical device for releasing the brake and allowing the stationary part to revolve with the rotating part, and for causing the guiding device to be withdrawn from the block after the strip has entered.

21. In a'blocking mechanism adapted to wind a strip coming from a strip mill, the combination of a rotating block mechanism,

a block comprising a rotating expandible part and an initially stationary part, a brake for holding the stationary part at rest, and means to guide the strip from the strip mill to the block between said rotating expandible part and the stationary part, and an automatic mechanical device for expanding ing mechanism into clamping position,

means for placing said spring under tension,

means to retain said spring under tension, and means -controlling said retaining 'means to operate the same'to releasing'position.

' 23. In blocking mechanism adapted to wind a strip comlng from a strip mill, the combination of a rotatable block, means to guide the strip from the strip mill to the block, a spring operatively connected to said guiding means for withdrawing the guiding means from the block after the strip is clamped to the block, means forplacing said spring under tension, means 'for retaining said spring under tension, and means for operating said retaining means to releasing position.

24:. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block comprising an initially stationary part and a mechanism adapted .to clamp the strip to saidstationary part, a brake for said stationarypart, means to guide the strip from the strip mill to the block, and a spring under tension for releasing the brake and causing the mechanism to clamp the strip to the stationary part of the block.

25. In a blocking mechanism adapted to stant at which the manually operated means should be operated. I

26. In a blocking device adapted to wind a strip coming from a strip mill,'the combination of a rotatable block, means to guide the strip from the strip mill to the block, a spring under pressure for withdrawing the guiding means from the block after the strip is clamped, manually operated means for causing the spring to withdraw the guiding means, and means controlled by the feeding movementof the strip for indicating the instant for said manual operation.

27. In a blocking device adapted to wind a strip coiningffrom a strip mill, the combination of a rotatable block comprising a stationary part and mechanism adapted with the stationary part to clamp the strip, a brake for said stationary part, means to guide the strip from the strip mill to the block, a spring under tension for releasing the brake and causing the mechanism with said stationary part to clamp the strip, and manually operated means for causing said spring to release the brake, and a signaling device operated by the feeding movement of v the strip for indicating the time for said manual operation.

28. In a blocking device adapted to wind a strip coming from a strip mill, the combi nation of a rotatable block comprising a stationary part and mechanism adapted with the stationary part to clamp the strip, a brake for said stationary part, guiding means for guiding the strip from the strip mill to the block, a spring under tension for operating said clamping mechanism, brake,

and guiding means simultaneously, and a manually controlled device for causing sald spring to function,-and'a signaling device automatically controlled by the feeding movement of the strip for indicating the time at which the manually controlled device should be operated.

29. In a-blocking device adapted to wind a strip coming from a strip'mill, the combination of a rotatable block, means to guide the strip from the strip mill to the block, means for clamping the strip to the block, an electromagnet for storing mechanical power to actuate said means, and another electromagnet for releasing this mechanical power that it may function to actuate the strip clamping means.

30. In a blocking device adapted to wind a strip coming from a strip mill, the combii,259,ie5

an electromagnet for storing mechanical power to actuate said strip clamping means, circuits; for said electromagnet, and a manually operated circuit closer for the circuits of said electromagnet.

31. In a blockingdevice adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means to guide the strip from -the strip mill to the block, means for clamping the strip with the block an electromagnet for storing mechanical power to actuatevthe strip clamping means, means for holding said mechanical power stored, and an electromagnet for releasing said means;

32. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means to guide the strip from the strip mill to the block, means for clamping the strip with the block, an electromagnet .for' storing mechanical power to actuate the strip clamping means, means for holding said mechanical power stored, an electromagnet for releasing said means, and a' manually operated. circuit closer for controlling said electromagnet.

33. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying an inner rotatable member and an outer member adapted to be held stationary, a brake for said stationary member, means to guide 106 the strip from the mill rolls to the block, and means for storing mechanical/power for actuating the inner rotatable member and for releasing the brake from the outer stationary member to cause the strip to be attached to the block, and to also Withdraw the guiding means after the strip is attached to the block.

34. In a blocking device adapted to wind a strip coming from a strip mill, the com- 110 bination of a rotatable block embodying an inner rotatable member and an outer statlonary member, a brake for said stationary member, means for guiding the strip from the mill rolls to the block, and an electro responsive device for storing mechanical power for actuating the inner rotatable member and for releasing the brake, to thereby cause the strip to be attached to the block, and the guiding means to be withdrawn after the strip is attached,

ber adapted to be held stationary, a brake for said stationary member, means for guiding the strip from the mill rolls to the block,

an electroresponsive device for storing mechanical power for actuating the inner rotatable member and for releasing the brake from the outer stationary member, to thereby cause the strip to be attached to the block, said power also withdrawing the guiding means after the strip is attached to the block, and a manually operated circuit closer for controlling current in said electroresponsive device.

36. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying an inner rotatable member and an outer member adapted to be held stationary, a brake for said stationary member, means for guiding the strip from the mill rolls to the block, an electroresponsive device for storing mechanical power for actuating the inner rotatable member and for releasing the brake from the outer stationary member, to cause the strip to be attached to the block, said power also Withdrawing the guiding means after the strip is attached to the block, a manually operated circuit-closer for controlling the current in said electroresponsive device, and an'electric circuit closed by the feeding movement of the strip for signaling the right instant for the operation of the manually operated circuit-closer.

37. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying an inner rotatable member and an outer member adapted to be held stationary, a brake for said stationary member, means for guiding the strip from the mill rolls to the block, an electroresponsive device for storing mechanical power for actuating the inner rotatable member and for releasing the brake from the outer stationary member, to thereby cause the strip to be attached to the block, said power also withdrawing the guiding means after the strip is attached to the block, means to hold said power stored, and an electroresponsive device for releasing said means.

38. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying an inner rotatable member and an outer member adapted to be held stationary, a brake for said stationary member, means for guiding the strip from the mill rolls to the block, an electroresponsive device for storing. mechanical power for actuating the inner rotatable member and for releasing the brake from the outer stationary member, to cause the strip to be attached to the block, and the guiding means to be withdrawn after the strip is attached to the block, means to hold said power stored, and an electroresponsive device forreleasing said means, and a manually controlled circuit closer and circuits connecting said circuit closer with said elec troresponsive device. a

39. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block embodying an the strip is attachedto the block, means to I hold said power stored, an electroresponsive device for releasing said means, and a manually controlled circuit closer and circuits connecting said circuit closer with said electroresponsive device, and a signal device controlled by the feeding movement of the strip for indicating the time at which the manually operated circuit-closer should be operated.

40. In a mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block consisting of an outside sectional shell forming a cylindrical tube, and an inner rotatable expandible mechanism, a toggle joint associated therewith, means to guide the strip from the strip mill to the block between said outside cylindrical shell and the inner rotatable expandible mechanism, and a spring adapted to actuate the toggle joint to thereby clamp the strip to the block after same has entered the block.

41. In a mechanism adapted to wind a strip coming from a strip mill, the combination of a rotatable block consisting of an outside sectional shell forming a cylindrical tube, and an inner rotatable expandible mechanism, a toggle joint associated with the expandible mechanism, means to guide the strip from the strip mill to the block between said outside cylindrical sectional shell and the inner rotatable eXpandible mechanism, and a spring adapted to actuate the toggle joint and thereby clamp the strip with the'block after same has entered in the block, and meanst0 release said spring to permit it to function.

42. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block, means to guide the strip from the strip mill, mechanical means for clamping the strip to the block, mechanical automatic actuating means for operating saidvmechanical clamping means, and electromagnetic means for controlling said mechanical automatic actuating device.

43. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotatable block, mechanical means for clamping the strip to the block, and means to guide the strip from the strip mill to the block, and automatic mechani- -cally operating means for actuating said mechanical clamping means and gulding means.

44. In a blocking device adapted to wind a strip coming from a strip m-ill,'the combination of a rotatable block embodying an outside cylinder, mechanical means 'for clamping the strip against the inside of said cylinder, a brake for holding the outside cylinder at rest, means to guide the strip from the mill, rolls to the block, and automatic mechanically operating means for operating said brake and the mechanical means for clamping the strip against the inside of the cylinder, and for withdrawing the guiding means.

- 45. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotating block and automatic mechanical'means for clamping the strip to the block, an actuating device for controlling said automatic mechanical clamping means, manual means for controlling said actuating device, and means controlled by the feedlng movement of the strip to indicate the right instant when the mechani: cally operated controlling device .is to be operated.

46. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotating block and automatic mechanical means for clamping the strip to the block and two elec'troresponsive de-. .vices for controlling said automatic mechanical clamping means.

47. In a blocking device adapted to wind a strip coming from a stripmill, the combination of a rotating block and automatic mechanical means for clamping the strip to the block, two electroresponsive devices con trolling said automatic mechanical clampin means, manual means for controlling sai electroresponsive devices, and automatic indicating means for indicating the time at which the manual means is to be operated. 48. In a blocking device adapted to wind a strip coming from a strip mill, the combination of a rotating block and automatic mechanical clamping means for clamping the strip to the block, an electroresponsive device for controlling said clamping means momentarily before the strip is to be clamped to the block, and a second electroresponsive device for controllingmomentarily the strip clamping device at a predetermined instant when t e strip is fed toward the blocking mechanism to be clamped.

49. In a blocking device adapted to wind a strip coming from a strip mill, the combi-.

nation of a rotating block and automatic mechanical clamping means for clamping the strip to the block, an electroresponsivc device for controlling said clamping means a period of time before the strip'is to be clamped to the block, and a second electroresponsive device for controlling said clamping means at a predetermined instant when the strip is fed toward the block, circuits for said electroresponsive devices, and manually operated switches in said circuits.

50. In a blocking device adapted to Wind a strip coming from a strip mill, the combination of a rotating block and automatic mechanical clamping means for clamping the strip to the block, an electroresponsive device for momentarily controlling said clamping means a period of time before the strip is to be clamped, a second electroresponsive device for momentarily controlling the clamping means at a predetermined instant when the strip is fed toward the block to be clamped thereto, circuits for said electroresponsive devices, manually operated switches in said circuits, and means controlled by the feeding movement of the strip for establishing an electric circuit for signaling the predetermined instant when the strip fed toward the block is to be clamped thereto.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

, AUGUST SUNDI-I. Witnesses:

H. RoNNE, EnNEs'r L. GALE, Jr,