US968143A

US968143A - Machine for blocking horse-collars.

Info

Publication number: US968143A
Application number: US34628806A
Authority: US
Inventors: Josiah B Gathright
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-12-04
Filing date: 1906-12-04
Publication date: 1910-08-23
Anticipated expiration: 1927-08-23

Description

J. B. GATHRIGHT. MACHINE FOR BLOCKING HORSE OOLLARS.

APPLICATION FILED DBO. 4, 1906.

968,143. Patented Aug. 23, 1910.

3 SHEETS-SHEET 1.

IIUIIIIIIHWI'IIIIIIIIH 1 wi meoaea 2 4 W a u 1:: Mann): FETIRS cm, WASHINGTON, n. c.

J. B. GATHRIGHT.

MACHINE FOB BLOCKING HORSE DOLLARS.

APPLICATION IILED D120. 4, 1906.

968,143. Patented Aug. 23, 1910.

a sums-sum z. 51

THE cams PETERS c0., WASHINGTON, n. c,

J. B. GATHRIGHT. MACHINE FOR BLOCKING HORSE GOLLARS.

APPLIOATIOH FILED DEC. 4, 1906.

968, 1 4:3. Patented Aug. 23, 1910.

3 SHEETS-SHEET 3.

I w v amg JOSIAH B. GATHRIGI-IT, OF LOUISVILLE, KENTUCKY.

MACHINE FOR BLOCKING HORSE-COLLARS.

To all whom it may concern:

Be it known that I, JOSIAH B. GATHRIGHT, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentuck have invented new and useful Improvements in Machines for Blocking Horse-Collars, of which the following is a specification.

This invention relates to certain improvements in machines for blocking or forming horse collars, and in a general way its purpose may be stated to be to provide the same with certain new and useful features, whereby the efficiency of the machine is materially increased.

The invention consists in certain peculiarities in the construction and arrangement of parts and in certain novel combinations of elements substantially as hereinafter described and particularly pointed out in the subjoined claims.

In the accompanying drawings I have shown a construction of machine for blocking or forming horse collars which exemplifies the several new and useful features which I have introduced into such machines; and which, also, embodies what I at present regard as the best detail forms of the several parts of the invention.

In the drawings :Figure 1 is an end elevation of such machine,- showing a part of the block or former in section. Fig. 2 is a side elevation of the machine. Fig. 3 1s a detail plan view of the table. F 1g. 4 1s a detail plan view of the groove-forming levers and their carrier. Fig. 5 is a detail sectional view, showing the relation of the several former-members when subjecting the collar Z to its final pressure. Fig. 6 is a detail view, partly in section, of the latch which holds in holding position the levers which support the drop frame and collar during the initial movement. Fig. 7 is a detail sectional View of a means, different from that shown in Fig. 1, for automatically varying the speed and power of the block. Fig. 8 is a detail sectional view of a still diflerent means for accomplishing the last named purpose.

The same characters of reference designate the same parts in the several views.

Before entering upon a description of the details of construction of the present machine, I wish to state that it comprises a frame, A, of construction appropriate to the mechanism employed and having a table A Specification of Letters Patent. Application filed December 4, 190B.

Patented Aug. 23, 1910. Serial No. 346,288.

which is size and shape corresponding to the blockmember B of the collarformer, which travels therethrough. This block member, as is not unusual in collar chinery, has a laterally-expanded top which forms a flange or head 6 adapting it to the shape to be given the collar. Around the opening A in the table A is the die C, which forms the rim of the collar. grooves in the collar, for the hames, are formed by a groove forming member which preferably comprises arms or levers d, d, which are arranged at opposite sides of the block B and above the rim die C, and are pivoted at one end to a holding or carryingframe E and have their other ends provided with means, which are also attached to said frame, for drawing them together in the formation of said grooves.

The relation of the parts is such that what may be referred to as a primary or preliminary pressure operation in the formation of the collar takes place while the block and provided with an opening A of forming ma- W The V the groove-forming members, with the collar in position between the same, are out of operative relation with the rim-forming die, whereby premature contact of the collar with the rim-forming die is prevented. This primary or preliminary operation may advantageously be, and is preferably, composed of the step incident to the adjustment of the collar, Z, the block B and the arms (Z, d into their relative operative positions, including such as are necessary to force the collar out to its full width by an initial pressure to which it is subjected by the tapered block in an early stage of its downward travel. Upon the completion of this primary or preliminary operation on the collar, a relative movement of the parts which performed it (together with the collar) and the rimforming die, takes place, whereby the collar is now in operative relation with the rim-forming die as well as with the block and groove-forming arms.

It is preferable, in the relative movement referred to, to move the block-member B and the groove-forming member D, with the collar clamped between them, to the rimforming die C. A very desirable means, which constitutes one of the features of the present invention, for effecting such transfer of parts, comprises a drop frame, E (carrying the groove formers) ,which is automatically moved from the initial to the final forming positions under the control of the block-member B.

Having thus in a general way set forth some of the novel features of my present machine, I will now proceed 'more fully to describe the same and particularly to set forth many novel and advantageous details of construction which are embraced in the preferred form of my machine. A suitable construction of frame A comprises a series of supporting legs 1 which are connected with each other, and braced, at the sides of the frame by angle irons 2, and are further braced by a channel iron 3 which is connected with said angle irons and serves the additional purpose of a base support for a screw shaft 4. This shaft 4 operates to raise and lower-the block B. This block is connected with the shaft preferably in a peculiar manner which will be hereinafter set forth in detail. A suitable operating means for said shaft comprises a bevel gear 5, arranged above a driving shaft 6 which is provided with a pulley 7 by which it receives its power from a suitable source. The shaft 6 is also provided with bevel gears 8 which are adapted to transmit movement to said gear 5, one to drive the shaft 1 in one direction and the other to drive the samein the other direction and thus to cause the block B to be raised and lowered on said shaft. Foot levers 9 are provided with any of the usual or suitable gear-shifting connections, indicated generally at 10, which connect the same with the respective gears 8 and shift said gears into and out of mesh with said gear 5 when said levers are depressed from and restored to their normal positions, respectively.

The form of the block B, constitutes one of the severally new features of my invention. As devised and preferred by me, it is of greater vertical length than the ordinary block and its lower port-ion b has tapering sides, while its upper portion 72 is of usual shape, (that is to say has approximately vertical or parallel sides) and constitutes the final outward pressure-exerting part of the block. As clearly indicated in Fig. 2 the tapered portion of the block is of less height at the front or throat end than at the rear or withers end of the block, the upper end of the tapered portion being represented by the line 1112 which extends inclinatorily upward and rearward from the front to the rear end of the block. The throat end of the block also preferably has a special inward inclination, :20, which extends to the bottom of the block from a suitable place as as above the same.

Attention is called to the fact that owing to the special bevel as of the block B, the first action of this member in its movement downward through the collar is to force the latter backward against the groove'formers, and

scenes then, by reason of the fact that the tapering lowerportion of the sides of said block has its upper termination in a lower plane at the throat end than at the withers end thereof, the pressure of groove forming action of the block on the collar first takes place at the throat or closed end of the collar and later, in the progressive movement of the block, gradually reaches the withers, or open, por tion of the collar. By thus causing the descending block to first force out the closed end of the collar against the groove formers, the formation of the groove is completed in detail with a minimum of power. The inward bevel m, also facilitates the adjustment of the collar upon the block B and between the latter and the arms (Z (Z.

Another of the severally new features of the present detail construction, made possible by the before described construction of the block B, consists in fixing against relative movement the fulcra or pivots 12 of the outer or withers ends of the groove forming arms, (Z, (Z. This avoids the necessity of employing means to adjust the withers ends of the groove formers, and moreover has the further important advantage of enabling the inner edges of the groove formers to be so positioned with respect to the block as to form perfect guides for the middle seam grooves of the collar, thus materially assisting the attendant in the operation of positioning the collar on the block.

A desirable means for adjusting the heel or throat ends of the arms (Z, (Z, comprises a right and left threaded shaft 15 which is journaled in suitable bearings 16 on the drop frame E and is provided at one end with a suitable operating device, such as the wheel 17. Threaded upon the shaft 15 are slides 18 and 19 which move toward and from each other and traverse and are guided by a slot 21 which extends transversely of the frame E.

The heels of the groove forming arms (Z, (Z, are pivoted to the upper sides of said slides, as shown at 22 and 23, and said pivots are preferably arranged eccentric of the centers of the heels, and the confronting edges of said heels are squared, whereby they are adapted to squarely abut each other when the arms are closed together. A lug 24 is provided to project over the abutting edges of said heels to hold these down while in contact with the collar, but is sufficiently narrow to leave the heels free when they are wide apart.

The rim die C, as most clearly shown in Fig. 5, is preferably made in two parts, to wit, a base 25 and a cap or die 26 proper. The base part is preferably integral with the top plate or table A, from which it pro jects a suitable distance. The cap 26 is made of bronze in order that it may not discolor the collar and is provided around its inner edge with an upwardly projecting bead 27 which forms a thin upper edge adapted to enter the space between the block and the rim of the collar and to force the latter outwardly, thus securing a desirable result not obtained by other blocking machines. The upper edge 27 of the die fits snugly against the surface of the block, except at the open portion which is at the open end of the collar. It will be observed that the face of the bead is of curvature corresponding to that of the rim, whereby the rounded outlines of the rim is preserved and said rim formed free from the objectionable sharp ridge which byother machines are pressed out from it.

The drop frame E hereinbefore referred to is normally supported, at a distance above the rim die 0, upon a movable holding means which is advantageously composed ofa series of rocking levers 30, arranged beneath the corners of said frame and pivotally supported, by means of trunnions 31, journaled in re cesses 32 which are formed in the upper surface of the table or plate A. These levers extend above and below said table or frame A, through openings 33 formed in the latter, and the trunnions 31 are preferably nearer their upper than their lower ends and are slightly eccentric to cause the levers to bend over from pressure, when released. The levers are connected with each other, for simultaneous movement, at the sides of the machine by longitudinally-extending connecting rods or bars 34 and at the front of the machine by a transversely extending rod or bar 35, and their lower ends are pivoted to said rods or bars. A latch, or other suitable holding means, 36, is pivoted at one end (37) to a suitable part of the frame of the machine and projects thence to a position beneath the contiguous bar 35 which it is adapted to engage in order to hold the levers 30 in their upright or holding position. To the end that this latch may be operated at a predetermined time, to release the levers from its restraint to their movements from their holding posi trated, that before the block has acted upon the pin 38 to force the latch 35 out of engagement with the rod 34, said block will have moved through the collar distance such that its tapering sides will have passed through the collar and its vertical sides have entered the collar and forced the same out to its full width against the groove-forming arms, (5, cl. When the latch has been thus released from the rod 35 the levers 30 are free to turn forward on their eccentric pivots, so that further downward movement of the block with the collar Z clamped thereon, will impose pressure on the frame E causing said levers to turn and the frame and groove forming arms to descend with the block, thus carrying the collar down to its position upon the die C, where it receives its final and full pressure between said block,

' arms and die.

When the collar has been fully blocked, the block is elevated by reversing the movement of the shaft 1; the frame E is raised, preferably by springs 10 mounted on bolts 41 which extend loosely through openings in the ends of said frame; the eccentrically pivoted levers 30 resume their holdingposition, under the influence of gravity or suitable springs; and the latch 36 is raised into engagement with the rod 35 by a suitable spring 12.

The block B is guided in its travel upon the shaft 1 by suitable means which may desirably comprise a skeleton frame or spider 45, through which the shaft 4 extends, having two of its arms 46 secured to the arms 47 which fix it to the underside of the block B and its other two arms, 48, provided with openings through which extend fixed guide rods 49.

5O designates a bridge piece in which the upper end of the shaft 4 is journaled. This bridge supports the upper thrust of the shaft while the block B is being driven down through and into the collar. A set screw 51 takes up the wear on the end of said shaft.

Another of the advantageous features of my invention relates to means whereby different speeds of travel are given to the block B, causing it to move more slowly and with greater power during one portion of its travel than in the other portion thereof. The parts which accomplish this shifting of speed may be and preferably are so arranged that the rapid movement of the block is throughout that portion of its travel between its upper limit and the place where its flange Z) begins its contact with the collar at which time the final pressure commences.

For the purpose stated, in the forms illus trated, a speed shifting sleeve, 60, is interposed between the shaft 1 and the block B. This sleeve has its outer surface provided with threads of fine or low pitch which engage corresponding threads. on the interior of the block, while its inner wall is formed with threads which are much coarser and of higher pitch than those on its outer surface and engage corresponding threads on the shaft 4. Means are also provided forcausing the sleeve and block to reciprocate together during a portion of the travel of the block and for stopping such reciproca tory movement of the sleeve within the limitsof the reciprocatory movement of the block, whereby as will be readily understood the movement first referred to will be upon the coarser threads and hence more rapidly than the movement second referred to, which latter will be of the block upon the fine and more prwer-imparting threads of the sleeve. Difieient means for accomplishing this may be employed, two such being shown in the accompanying drawings. Thus, in the form most clearly shown in Fig. 1, the flanged upper end 61 of the sleeve is provided with a pin 62 which engages a detent lever 63 which is pivoted to and projects from the top of the block B. \Vhen this pin and lever are engaged with each other, the sleeve and block are locked against relative movement, whereby the movement is upon the coarse and highly pitched threads of the shaft and inner wall of the sleeve. A desirable means for unlocking them comprises a chain or other flexible connecting means 64 between the lever 63 and arelatively fi-Xed part of the machine, such as the bridge piece 50, so adjusted .in length that it will be tightened when the block has reached the place at which the speed is to be shifted, and thus, by further ,movement of the parts, raising the lever out of engagement with the pin 62. Continued rotation of the shaft will now of course cause a continuance of the movement of the block, but it will be on the fine and low pitched threads of the sleeve, which latter now turns with theshaft. On the return movement the travel will be on the fine thread until the pin 62 reaches and engages the detent lever 63 when the remainder of the upward movement will be on the rapid shaft thread.

The foregoing means is adaptable to forms wherein the differential between the two threads is such that the normal initial movement would otherwise be on the fine thread, between the sleeve and block. If, on the other hand, the differential be such that the normal initial movement would be on the shaft thread no detent would be needed.

I have found in practice, in a machine in which the differential in the pitch of the threads was about 25 per cent, that, contrary to what might be expected, the initial movement is not on the finer threads between the sleeve and block but on the shaft thread, and in order to meet this condition and produce movement on thefiner threads I have devised means which are illustrated in Figs. 7 and 8, and embodies a device arranged on the shaft in such relation to the sleeve as to stop its movement on the shaft and to force movement of the block on the fine threads of the sleeve. This device is herein shown as an adjustable collar designated 62 in Fig. 7 and 61 in Fig. 8 having a screw or other device for fixing it on the shaft 4 at the place where the change is to be made.

In the form shown in Fig. 7 the collar 61 is arranged to enter a socket 61 formed on the lower end of the sleeve designated 60". The initial movement being on the shaft, the block moves rapidly down on the threads thereof until the socket 61 engages the collar 62 The sleeve is now fixedly connected to the shaft and. no further downward movement of it takes place, thus causing the remainder of the travel of the block to be on the sleeve. The socket 61 and the collar 62 form elements of a friction clutch. In the reverse movement of the shaft the friction between the clutch elements causes the block to move upwardon the sleeve until its upper end contacts with the flanged upper end of the latter, whereupon the sleeve is caused to rise upon the shaft threads, carrying the block with it.

'In the form shown in Fig. 8 the socket is omitted, and the downward movement of the sleeve, designated 60 upon the shaft is arrested and the sleeve forced to rot-ate with the shaft, by contact of the plane lower surface of the sleeve with the upper surface only of the collar 61. This forces the block to move slowly and with great power downward upon the sleeve, in the step of giving the final pressure to the collar, as in the other forms. hen the direction of rotation of the shaft is reversed, the sleeve 6O being free to rise ascends with the block (the movement being on the threads of the shaft) until it is again fixed to the shaft. .For the latter purpose a lever 63 is loosely pivoted at one end to a split collar 62 which is fixed to the shaft. This lever is arranged at the place where the desired change is to occur and is adapted to engage a pin 64? which projects from the sleeve and therewith serves to lock the sleeve to the shaft, so that the block will now travel on the sleeve. In its movement upward upon the sleeve, the block engages the end of the lever '63" and frees the latter from the pin 64?, so that the-sleeve is now free to descend on the shaft, with the block, when the shaft is moved to produce such travel of the sleeve.

From the foregoing the operation of the machine will readily be understood to be as follows :Vhen the parts are in the position shown in Fig. 1, the collar is slid into position upon the frame E and astride the block B, by the attendant the close proximity of the inside edges of the arms (Z, (Z of the groove former enabling them to serve as guides which materially assist the attendant in correctly positioning the collar around the block and between the arms, this being as stated one of the new features of my machine. The wheel 17 is then turned to adjust the arms (5, d, toward each other on their pivots. l/Vhen the heels of said and means whereby movable elements of arms have approached near to each other, the right hand treadle 9 is depressed by the foot of the attendant, and the block B starts its movement through the collar during the final portion of the approaching movement of the arms (Z, (Z. The groove forming arms first reduces the width of the collar from the normal by pressing it inward toward the block, this action being permitted by the relation of the block to said arms at this stage in the operation, and, by reason of its peculiar shape, the first action of the block is to force the collar backward against said arms, then outward to its full or normal width, and afterward, when its tapered part has passed through the collar, it strikes the pin 38 and depresses the catch 86, thus releasing the bar 35 and permitting the levers 30 to rock. The motion downward of the block being continued, the frame E is lowered with it, until the collar rests on the rim C. Up to this time the motion of the block has been a rapid one, but is now varied to a slow and powerful pressure and continued until the collar is under full pressure. hen the collar has remained under such pressure for the desired length of time, the left hand treadle 9 is depressed, thus shifting the gear 8 cont-rolled by it into engagement with the gear 5, it being of course understood that the other gear 8 has meanwhile been adjusted out of engagement with the gear The block is thereby elevated to its original position, releasing the pressure on the frame E and permitting the frame-to be raised by its springs 40, thereby also releasing pressure on the levers 30 which turn to their vertical position with the upward movement of the frame, and also releasing pressure on the latch 36 which is caused by its spring 42 to follow such rising movement and reongage the bar 85. During the upward movement of the block B a reverse turn is given the wheel 17 whereby the heels of the arms (Z, (Z recede from each other and the collar is released from said arms and may now be taken out of the machine.

The speed changing mechanism shown is not essential to the good working of my invention as the shaft 4, working on a fixed threaded sleeve in the block, does excellent and speedy work, without any adaptation for change of speed.

It will, of course, be understood that the terms backward, rearward vertical etc. used herein are employed in a relative sense and not restrictively.

Having thus described the invention what I believe to be new and desire to secure by Letters Patent, is

1. A machine for blocking horse collars, comprising relatively movable compression devices adapted to subject the collar to primary and subsequent pressure operations,

said compression devices and the collar are transferred from the place of the primary pressure operation to the place of the subse quent pressure operation.

2. A machine for blocking horse collars, having compression devices adapted to hold the collar in a clamped relation, a compression element adapted to cooperate with said devices in subjecting the collar to compression and means whereby said compression devices and the collar are moved to bring the collar into operative relation with said compression element.

3. In a machine for blocking horse collars, means for subjecting the collar successively to primary and full pressure operations, comprising a block having means adapted to subject the collar to a preliminary outward pressure to force it to full width, a compression element which is free from pressure-exerting engagement with the collar during such preliminary-pressure op eration, and cooperates with the block in the subjecting of the collar to the final pressure, and means for holding the collar against the block.

4. In a machine for blocking horse collars, means for subjecting the collar successively to primary and full pressure operations, comprising a block having means adapted to subject the collar to a preliminary outward pressure to force it to full width, a compression element which is free from pressure-exerting engagement with the collar during such preliminary-pressure operation and cooperates with the block in the subjecting of the collar to the final pressure, and a groove-forming element whichis operatively engaged with the collar during both of the pressure operations.

5. In a machine for blocking horse collars, a former having means whereby it subjects the collar to a preliminary pressure first inward and then outward to full width and finally to full pressure, said means comprising a member for pressing the collar inward, a block having means for subjecting the collar to a preliminary pressure outward to full width against said member, and a compression element which is free from pressure-exerting engagement with the collar during said inward and outward pressure operations and cooperates with said member and block in subjecting the collar to final full pressure.

6. In a machine for blocking horse collars, a block which is movable through the collar and is adapted in an early stage of its movement to preliminarily press the collar outward to full width and has a lateral exiio tension, a groove former which is operas and rim die both free from pressure-exerting engagement with the collar during the preliminary pressure thereon and cooperat ing with the body of the block and grooveformer for subjecting the collar to full pressure.

7. A machine for blocking horse collars, comprising a groove former, means for moving the groove former to subject the collar to inward pressure, a block engaged with the collar during such pressure, said block adapted to move in the collar andsubj ectthe same internally to outward pressure first rearward and then outward to full width against the groove former, and rim pressing means cooperating with the block and groove-former for giving shape to the colla}.

8. A machine for blocking horse collars, comprising a block adapted to subject the collar to a preliminary outward pressure, a groove forming element operatively engaged with the collar during the exertion of said pressure, means adapted to cooperate with the block and groove-forming element in subjecting the collar to a subsequenbfull pressure, and mechanism whereby relative movement between said means and the collar is automatically effected for such full pressure.

9. A machine for blocking horse collars, comprising a block which is movable through the collar and is adapted in an early stage of such movement to preliminarily press the collar outward approximately to its full width, means cooperating with said block for subjecting the collar to full pressure, and means whereby the collar is moved from its place of the preliminary pressure to that of the full pressure.

10. A machine for blocking horse collars, comprising a block which is movable through the collar and is adapted in an early stage of such movement to preliminarily press the collar outward approximately to its full width, a groove-former which is operatively engaged with and holds the collar during the exertion of such preliminary pressure of the block, means 00- operating with said block and groove-former for subjecting the collar to full pressure, and means whereby the collar, and grooveformer are moved from the place of the preliminary pressure to that of the full pressure.

11. A machine for blocking horse collars, comprising a block which is movable through the collar and is adapted in an early stage of such movement to preliminarily press the collar outward approximately to its full width, a groove-former which is operatively engaged with and holds the collar during the exertion of such preliminary pressure of the block, a rim die and a lateral extension from the body of the block both free from pressure exerting engagement with the collar during such preliminary pressure thereon and adapted to cooperate with the body of said block and groove-former for subjecting the collar to full pressure, and means whereby the collar and groove-former are moved from the place of the preliminary pressure to that of the full pressure.

12. A machine for blocking horse collars, having a former comprised of a block, and a groove-forming member, said block mounted to move in the collar and having means whereby in its movement it forces the collar first rearward and then outward to full width against the groove-forming member.

13. In a machine for blocking horse collars, a block movable through the collar, a groove-former having elements movable toward the block into clamping engagement with the collar, said block and grooveformer cooperating to cause the collar to be reduced in width below its normal in the clamping movement of said elements and said block adapted in an early stage of its movement to press the collar outward against said elements approximately to its full width, and means cooperating with the block and groove-former for subsequently subjecting the collar to full pressure.

14. A machine for blocking horse collars, comprising, in combination with a rim forming member and a grooveforming means, a block which is movable relatively to the groove-forming means, and against which the collar is held by the latter, and means adapted to move the groove-forming means and collar with the block and relatively to the rim-forming means at a predetermined time in the movement of the block.

15. In a machine for blocking horse collars, a former having a rim member, a groove former and a block movable relatively to the groove former and rim member and having a. portion adapted to subject the collar to a primary pressure outward against the groove former in one stage of the movement of the block and a portion which later cooperates with the rim member and groove-former in giving full pressure to the collar, and means for producing relative movement between the groove-former and block and the rim member at the con clusion of the primary pressure to subject the collar to full pressure.

16. A machine for blocking horse collars, comprising a movable block, a rim forming member and a groove-forming member, said groove-forming member movable toward the rim-forming member, and means for restraining such movement of the groove-torming member until the block has reached a predetermined place in its travel.

17. A machine for blocking horse collars, comprising a groove-forming member and a rim-forming member, movable bodily relatively to each other, a block movable relatively to both of said members, and means for holding said members against relative movement, and means operated at a predetermined time in the movement of the block to permit such relative movement of the groove forming and rim forming members.

18. A machine for blocking horse collars having its former comprised of relativelymovable parts for subjecting the collar internally to outward pressure and its rim to pressure, respectively, and a groove forming member movable with the collar toward and from one of such parts, in combination with supporting means for the groove-forming member having a holding means arranged to be operated to permit the groove forming member to move at-a predetermined time in the relative movement of said relatively movable parts.

19. A machine for blocking horse collars, comprising a movable block, a rim die, a grooveformer movable toward and from said die, and supporting means for the groove-former, comprising a drop frame, and means for holding said frame against movement toward the rim die until a predetermined time in the movement of the block.

20. A machine for blocking horse collars, comprising a movable block, a rim die, a groove-former movable toward and from said die, and supporting means for the groove-former, comprising a drop frame, pivoted supporting levers for said frame and means for holding said lever against movement until a predetermined time in the movement of the block.

21. A machine for blocking horse collars, comprising a movable block, a rim die, a groove-former movable toward and from said die, and supporting means for the groove-former, comprising a drop frame, pivoted supporting levers for said frame and means for holding said levers against movement until a predetermined time in the movement of the block, said means comprising a movable holding device having a projection extending into the path of the block.

22. A machine for blocking horse collars comprising a movable block, a rim die, a groove-forming member and supporting means for the groove-forming member, movable toward and from the die.

23. A machine for blocking horse collars, comprising a movable block, a rim die, a groove forming member, and supporting means therefor movable toward and from said die, having a holding device arranged in the path of said block.

24. A machine for blocking horse collars, comprising a movable block, a. rim die, a groove former and supporting means for the groove former movable toward and from said die and provided with means controlled by said block for restraining its movement until a predetermined time in the movement of the block.

25. A machine for blocking horse collars, comprising a movable block, a rim die and a groove forming means movable toward and from the die and provided with a holding device controlled by movement of the block.

26. A means for blocking horse collars, comprising a block the lower portion of the front edge of which is inwardly inclined with relation to the contiguous part of said edge and is so disposed that it will act upon the collar, substantially in the manner and for the purpose specified.

27. A means for blocking horse collars, comprising a block having portions to act upon the collar successively, the first-operating of said portions having tapering sides and the other having approximately parallel sides.

28. A means for blocking horse collars, comprising ablock havingportions to operate on the collar successively, said portions formed respectively with tapering and approximately vertical sides, said tapering side having its upper line or terminal in clined from one toward theother end of the block.

29. A means for blocking horse collars, comprising a block which is mounted to move through the collar and is formed with a tapered portion the upper line or terminal of which is inclined.

30. A means for blocking horse collars, comprising a block formed with a tapered portion the upper line or terminal of which is inclined and with approximately vertical sides above the tapering portion, means whereby the block is moved through the collar and means for holding the collar against the block and forming. the grooves therein.

31. In a collar blocking machine, a block and a pair of groove forming arms fixedly pivoted against longitudinal movement at the withers end of the block and positioned relatively to the block to form guides for the middle seam groove of the collar.

32. In a collar blocking machine the combination of a block and a groove forming member contiguous thereto and through which said block is adapted to move, said block having a special inward bevel at the lower edge of its throat forming portion and initially so related to the groove-forming member that said bevel provides a clearance space between this portion of the block and the groove forming'memben- 33. In a collar bloc-king machine, the combination of a block having an inward bevel at its throat end, and a pair of groove forming arms fixedly pivoted against longitudinal movement at the withers end of the block and positioned relatively to the block to form guides for the middle seam groove of the collar, said block mounted to move between said arms and initially so related to the arms that its beveled portion will be contiguous to the latter.

34. In a collar blocking machine, the combination of a movable block and groove forming arms arranged to embrace the block and clamp the collar against the same, said arms fixedly pivoted against longitudinal movement at the withers end of the block and having adjusting means at the other end of the block, and said block having at the lower portion of its throat end a special inward bevel which in the initial position of the block is contiguous to the arms, and also comprising a tapered lower portion the upper line or terminal of which is inclined and a portion having approximately vertical sides above the tapered portion, and being mounted to move relatively to said member to bring said portions successively into operation on the collar.

35. In a machine for blocking horse collars, a block, a pair of groove-forming arms arranged to embrace the block, and means whereby said arms are adjusted toward and from each other and relatively to the block, comprising slides to which the throat end of each arm is pivoted, means for adjusting the slides toward and from each other, and pivots for the withers end of each .of the arms fixed against longitudinal movement.

36. In a machine for blocking horse collars, a block, a pair of groove-forming arms, each pivoted at the withers end and having its other end formed to contact closely one with another, a slide to which the latter end of each arm is pivoted off the center of said vend, and means for adjusting the slides toward and from each other.

37. In a collar blocking machine, a block having a body and a flange arranged successively to exert pressure on the collar, and means for producing relative movement between the collar and the block, including instrumentalities whereby the movement is changed to one of greater power and less speed when the flanged portion of the collar is in action.

38. In a machine for blocking horse collars, means for subjecting the collar successively to preliminary and final compression operations, having elements for producing relative movement between the parts for their successive pressures and means whereby the movement during the final pressure is one of less speed and greater power than during the preliminary pressure.

39. In a machine for blocking horse collars, an internally threaded block, having a flange, means for holding the collar to be blocked, and means for moving the body of the vblock through the collar and the flange into pressure-exerting engagement upon the collar, comprising a threaded shaft, a sleeve having external power-imparting threads engaged with the block and internal speedimparting threads engaged with the shaft, and means whereby the sleeve is caused to travel with the block until the flange is brought into engagement with the collar and its traveling movement is then stopped to cause the block to travel upon it.

40' In a machine for blocking horse collars, a sleeve having diflerential threads upon its interior and exterior, a threaded shaft upon which said sleeve is adapted to travel, a block engaging the external threads of the sleeve, said block having means for successively subjecting the collar to preliminary and final pressure operations, means for automatically determining the traveling movement of the sleeve upon the shaft upon the completion of the preliminary pressure, and means cooperating with the block for giving form to the collar during such pressures.

41. In a machine for blocking horse collars, a block formed to preliminarily press the collar outward to full width, a groove forming a member, and rim die and a lateral extension from the block cooperatively act-- ing upon the collar upon the completion of the preliminary pressure operation, and means for producing relative movement between the parts, including elements whereby the movement is more powerful when the rim die and lateral extension are acting than during the preliminary pressure.

42. A machine for blocking horse collars, comprising a former having a block adapted to subject the collars internally to a preliminary pressure outward to force it to full or normal size, and means cooperating with the block for subsequently subjecting the collar to full pressure, having a compression element which is free from pressure-exerting engagement with the collar during the preliminary pressure operation, and means whereby the power is automatically increased for said full pressure.

In testimony whereof I aflix my signature, in presence of two subscribing witnesses.

JOSIAH B. GATHRIGHT.

Vitnesses R. M. KILLGoRE,

F. C. MOORE.