US461917A - Power-hammer - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1. A. BEAUDRY. POWER HAMMER.

Patented Oct INVENTORZ .dt-orney.

4 Rm DM UA AH ER E M AP (No Model.)

Patented Oot. 27, 1891.

ITNESSES:

(No Model.) l 4 Sheets-Sheet 3.

A. BEAUDRY. POWER HAMMER.

No. 461,917. Patented Oot.Z7.,1891.

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MMV-@MU WlTNESSES:

Attorney.

| sns co., mow-umn., wAsmNafon n c (No Model.) '4 Sheets-Sheet 4.

A. BEAUDRY. POWER HAMMER. No. 461,917. Patented Octvl 27, 1891.

1 l 1 l 1| II l1llIlIIIIIIIIIHIHHHIIHIIII lIIIIIIIIHHIHIIII lNVENTOR;

Attorney.

UNITED STATES PATENT OEEICE..

ALEXANDER BEAUDRY, OF BOSTON, MASSACHUSETTS.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 461,917, dated October 27, 1891.

Application filed April 5, 1890. Renewed April 13, 1891. Serial No. 388,648. (No model.)

To all whom t may concern-.-

Be it known that I, ALEXANDER BEAUDEY, a citizen of the United States, residing at Boston, Suffolk county, Massachusetts, have invented certain Improvements in Power-Hammers, of which the following is a specification.

My inventionrelates to improvements in power-hammers; and the object of my invention is to produce a cheap and efficient hammer that will occupya limited space and be easT to regulate and keep in order.

My invention will 'oe fully described hereinafter and its novel features carefully deined in the claims.

In the accompanying drawings, which serve to illustrate my invention, Figure 1 is a sectional front elevation of a hammer embodying my improvements, the right side of the figure representing parts of the hammer in section and a part of the frame broken away. Fig. 2 is a side elevation with the fly-wheel removed and the main shaft in section. Fig. S is a sectional plan, the plane of the section being indicated by the line 3 3 in Figs. 1 and 2. Fig. 3a is a detail4 view, which will be hereinafter described. Figs. 4, 5, 6, 7, 8, and 9 illustrate otherembodiments of my invention, that Will be hereinafter described.

A represents the frame of the hammer, which I prefer to construct of two like sections or halves of cast-iron, which are united at their tops by bolts o, and secured at their bases to a bed-plate B by bolts. O is the main or driving shaft mounted in bearings h in the frame A. On one end of this shaft is the driving-pulley D and on the other end is the ily-Wheel E. This shaft passes through an opening formed in the anvilrbed F, which is mounted on the base B. In this bed is set the anvil or lower die G.

Mounted in vertical guideways or keepers c, formed in the inner faces of the two sections of the frame A, is the hammer-head H, which carries the removable die or former I. The head His inserted in its guides from the top of the frame A, which is left open to per mit it to enter freely, and said head is adapted to play up'and down in its guideways c.

I will now describe the means for imparting a vertical reciprocating movement to the hammer-head in its guideways.

The hammer-head His suspended on a stout strap d, preferably composed of several strips of rawhide superposed. This strap is passed through an eye in the head and has secured t0 its respective ends hooks e. Each hook engages a yoke or cross-head f, to which is coupled a connecting-rod .I said rod being coupled at its lower end to the strap K of an eccentric L, fixed o'n the shaft C. As the mechanismA at one side of the frame A is an exact duplicate of that at the other side, a minute description of that at one side will sufice. In Fig. 1 the mechanism at the left side of the frame is represented in dotted lines, as it is concealed from view by the side plate of the frame, but that at the right side is exposed to view by the breaking away of the frame. The cross-head f has eyes in its ends and is slipped onto the respective stems g of two like curved racks h, which gear, respectively, with two like straight racks t, secured to the outer face of the frame A. The stems of the two curved racks are connected by a tie j, and on said stems are cushionsprings le', which abut at their inner ends against set or screw collarsl on the respective stems. The cross-head f bears on or against the outer ends of said springs.

In Fig. 3 a curved rack:v h and a straight rack c' are seen detached, the latter being represented in section. It will be seenbyinspection that the pairs of cushion-springs@ on opposite sides of the frame A, which will be under considerable tension, tend to strain the strap d taut, and thus enable it to support the hammer-head. without sagging. the shaft O is setin motion, the eccentrics Il, acting through the connecting-rods J ,impart a vertical reciprocating motion to the crossheads j', and these latter, moving up and.

in this class of hammers the normal movenient of travel of the hammer-head (due to the throw of the eccentrics in this case) is "When I IOO -for this purpose.

.plane of the line t 4 in Fig. 6.

draw the connecting-rods J inward at theirv upper ends to a slight extent, and to allow for this I couple these rods to their respective eccentric-straps by coupling pins or bolts n, the axes of which are at right angles to the axis of the eccentric-shaft C.' In order to allow for the swinging movement of the connecting-rod forward and back as the eccentric rotates,I make the bearing on this crosshead f where it receives the upper end of the rod of a spherical forni. The connecting-rods may be provided with coupling-sleeves o, whereby they can be lengthened and shortened within limits for accurate adjustment of their length.

When the guideways in the frame and the sides of the hammer-head shall have become worn to such an extent that the latter playsr too loosely, the two sections of frame A may be brought nearer together by inserting a thinner washer p at their upper ends and screwing up the bolts a thereat, and the bolts which secure the bases of the frame-sections to the bed-plate B may be loosened and the said sections set nearer together at the base. The bolt-holes in the frame will be slotted In order to keep the curved racks h in engagement with the straight racks 7l, or to insure against the former slipping laterally off the latter, I prefer to provide the racks ol with side plates r, as shown.

I employ the curved racks 72. and straight racks/1l as a means of preserving the parallelism of the cross-heads f in their reciprocating movements; but other means or parallel mechanisms may be employed for this purpose. In Figs. 4, 5, and 6 I have shown such a substitute mechanism, and this I will describe, premising that I have deemed it sufficient in these views to show only such parts of the hammer as are necessary to clearly illustrate the operation of said substitute mechanism, the other parts (not shown) being the same as those already described.

Fig. t is a sectional elevation taken in the Fig. 5 is a side view similar to Fig.. 2, and Fig. 6 is a plan view similar to Fig. 3. In these views the crosshead f is coupled to the connecting-rod J in the same manner as the cross-heady, before described, and bears on its extremities grooved sheaves f2,which roll on track-bars s. 'Ihese bars have eyes in their extremities and slide on stems t, mounted in the frame A. The track-bars s bear on cushion-springs aon the stems t, on which are square screw-collars Z', against which the said springs abut. The hooks c engage the cross-head in the same manner as described with reference to Figs.

l, 2, 3, and 3a. In order to regulate the tension of the springs 7s, I screw the collars Z along their respective stems, and to do this I mount said stems rotatively, their conical stems t may be rotated with la wrench, as will A be readily understood. f

In Figs. 7, 8, and 9 I have illustrated another embodiment of my invention, which differs from that illustrated in Figs. 1 to 3a only in the parallel motion or mechanism, whereby the upper ends of the connectingrods J are made to move in parallel planes.

Fig. 7 is a side view corresponding to Fig. 2. Fig. 8 is a front View corresponding to Fig. l, and Fig. 9 is a sectional plan view corresponding to Fig. 3. In Fig. 8 I have only shown one side/of the hammer, as the other side will be a duplicate thereof. In this embodiment of the invention the connecting- @c on a diagonally-arranged link a', which is coupled at its respective ends to the free ends of two rocker-arms b and b2. These arms are alike, but reversed vas to position, and are respectively mounted to turn about and slide on cylindricalflxed screw-threaded rods c and c2, being cushioned, respectively, on springs d and d2 on said rods. These springs abut against tension-regulating nuts e and e2 on the respective rods. The wrist to which the rod J is coupled, is tubular and through it passes an eyebolt g', a nut h on said bolt serving to hold it and the connecting-rod in place. To the end of this eyebolt is coupled a yoke to which is connected the end of strap d." The axes of the wrists :r on the opposite sides of the hammer-frame are compelled to move up and down in parallel planes by reason ofthe Z-shaped parallel motion, consisting of the diagonal link ct and rocker-arms b and b2, which latter will be of uniform length. The cushion-springs d and d2 perform the same functions as the springs 7o of the other constructions described. It will be obvious that a parallel motion may be employed in all respects similar to that described, except that IOO the plane of the Z formed by the link a and arms b and b2 will be at right angles to that seen in Fig. 7.

Having thus described my invention, I claim- 1. In an upright power-hammer, the combination,with a frame and a hammer-head mounted to play in vertical guides in the same, of a shaft C, mounted in the lower part of said frame, two eccentrics L on said shaft, the eccentric-straps K, the connecting-rods J, the strap d, which carries the hammerhead, and cushioned parallel'motions, substantially as described, coupled to the respective ends of said connecting-rods, the said strap CZ being also coupled at its respect- IZO ive ends to the said parallel motions, subsiantially as set forth.

2. In an upright power-hammer, the combination of the base-plate B, the two sections AA of the frame mounted adjustabl y thereon and provided with securing-bolts a at the top,

and guides c c for the hammer-head, the said hammer-head, and means, substantially as described, for imparting a reciprocating movement to said hammer-head in its guides, as set forth.

8. The combinatio11,with a frame, a hammer-head mounted in guides therein, a suspending-strap d, which supports said head, the shaft C, the eccentrics thereon, the eccentricstraps and connecting-rods, and the two likecushioned parallel movements, to which the strap d is attached at its respective eXtre1nities, said movements each comprisinga diagonal link al', to Which the strap CZ is coupled', the two rocker-arms Zi and b2, to the free ends of which the respective ends of the link a are coupled, the rods c and c2, on which said arms are mounted, and the cushion-springs on said rods between the arms and the frame, substantially as set forth. l

4. In a vertical power-hammer, the combination, With a frame provided with guides for the hammer-head, the said hammer-head mounted therein, the supporting-strap d, the cross-shaft C in said frame, the eccentrics on said shaft, the straps on said eccentrics, the connecting-rods coupled at one end to said straps and connected at the other end to the respective ends of the strap d, and guides for the said rods, substantially as set forth.

. In Witness whereof I have hereunto signed my name in the presence of tWo subscribing' witnessesk ALEXANDER BEAUDRY.

Witnesses:

GEO. E. SMITH, GEORG-E A. TREADWELL.

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