US2256718A

US2256718A - Chain press

Info

Publication number: US2256718A
Application number: US279267A
Authority: US
Inventors: Richard F Kreiter
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-06-15
Filing date: 1939-06-15
Publication date: 1941-09-23
Anticipated expiration: 1958-09-23

Description

Sept. 23, 1941.

R. F. KREITER CHAIN PRESS Filed June l5, 1939 2 Sheets-Sheet l "unl- Til [NVE/V701? TL/.emma BY M #www N A TTOJNE Y E N Q N mul/A vvv 4 Sept 23, 1941-- R. F. KREITER 2,256,718

CHAIN PRESS Filed June l5, 1939 2 Sheets-Sheet 2 NVENTOR BY Plc/Meo /F` Kef/721e ATTORNEY Patented Sept. 23, 1941 UNITED STATES PATENT OFFICE CHAIN PRESS Richard F. Kreiter, Houston, Tex.

Application June 15, 1939, Serial No. 279,267

9 Claims.

This invention relates to a chain press.

An object of the invention is to provide a machine for removing the pins connecting the links of a sprocket chain as well as for replacing said pins.

The links of sprocket chains as commonly manufactured are connected by pins, the connecting pins having a pressed t in some of the links and a loose fit through the other links to give the required flexibility to the chain and in use it is sometimes necessary tol remove these connecting pins for making repairs such as substituting new links for broken ones or for lengthening or shortening the chain. The invention herein described has been specially designed for removing and replacing the chain pins when it becomes necessary to substitute new links for old ones or to lengthen or shorten the chain.

It is another object of the invention to provide a portable machine that will be instantly available when required.

It is another object of the invention to provide' a chain press of the character described that may be manually operated and which is so constructed that the manual power applied to the operating handle will be multiplied when applied to the actual work of forcing the chain pins out of or into the link bearings.

While the press has been primarily designed for removing and replacing sprocket chain pins this speciication and illustrated in the accompanying drawings, wherein:

Figure 1 shows a plan view of the press.

Figure 2 shows a side elevation, partly in section.

Figure 3 shows a cross-sectional view taken on the line 3-3 of Figure 2.

Figure 4 shows a fragmentary, plan View of the bed showing the sprocket plate as being applied thereto.

Figure 5 shows a cross-sectional View taken on the line 5-5 of Figure 2.

Figure 6 shows an enlarged, fragmentary, longitudinal sectional view taken on the line 6-6 of Figure 1 showing the parts in position to begin the operation.

Figure 7 shows a view similar to Figure 6, but showing the parts at the end of a working cycle.

Figure 8 shows an enlarged, cross-sectional view taken on the line 8-,8 of Figure 1 showing 55 the parts in an intermediate position during the completion of a stroke, and

Figure 9 shows a similar View showing the parts at the end of a working stroke.

Referring now more particularly to the drawings wherein like numerals of reference designate the same parts in each of the figures, the numeral I designates the bed of the press which, at one end is reduced in width forming the eX- tension Ia which is formed with a transverse bore 2 into which there is pressed a tubular bushing 3 to receive the transverse rod 4 whose ends project each way beyond the bed. Rotatablymounted on the projecting ends of the rod 4 are the

eccentric spindles

5, 5 which fit snugly within the

front bearings

6, 6 of the connecting rods l, 'I. The eccentric spindles, or cams, 5 are formed integrally with the central hood 8 forming a handle block and having the

sockets

9, 9 to receive the handles Ill. The bearings 6 may be held against detachment from the cam shaped spindles by means of suitable cotter keys I I, I I.

It is obvious that as the handles Ill are oscillated the connecting rods 'I will be correspondingly oscillated.

At its forward end the topY of the bed I4 is countersunk thus forming the opposing shoulders I2, I2 curved on a common circle and provided with the arcuate grooves I3, I3. A sprocket plate I4 is provided. The opposing ends of this sprocket plate have the arcuate tongues I5, I5. In application the sprocket plate is seated in the countersunk portion of the bedtransversely of said bed, as shown in Figure 1 and then given a quarter turn so that the tongues I5 will seat in the grooves I3 as shown in Figure 2 in which position the sprocket plate may be maintained by a suitable pin fitted through the openings I6, II, which will align when the sprocket plate is properly positioned on thebed as shown in Figure 2. The sprocket plate I4 has the required number of rows of sprockets as I8 which are received by the links of the sprocket chain as I9, as shown in Figure 3, when the chain is positioned on the press.

The sprocket plate, as is obvious, can readily be removed and another substituted for it having the required number of sprockets to receive the particular size of type of chain to be operated on. The opposite, or rear, end of the bed, is also reduced in width forming the rear extension Ib whose upper margin has a wide groove 20. As will be noted from an inspection of Figure 2 the upper surface of the rear extension Ib is elevated above the upper surface of the forward portion of the ward face against which the plunger block 24 abuts. Said block has the forwardly extending push pins, or plungers, 25, 25.V These plungers are ofY 'a diameter less than the diameter of the chain pins to be operated on. These chain pins will vary in diameter in accordance with the type of sprocket chain and consequently the plunger block 24 and its pins 25 must be changed to pro- ,Y

Y vide push pins of the Yrequired diameter; hence the plunger block 24 is madev separate -from the head 23. V i y A ratchet block 2S is tted over the rack bar 2| and embraces the rearward extension Iband is Y movable therealong.` This ratchet block has, in

its "under `face, ratchet teeth 21 pitched the reverse of the pitch of the teeth "22 and lengage-Y :able withsaid last mentioned teeth. The Yratchet centric spindles 5 will be upwardly as shown in` Figure 3, with the handles Il) in upright position as also shown in Figure 3. In this position it will usually require too much power to start the chain pins as in some cases it requires a very high pressure to start the pins to move. Therefore, in starting the work the hand lever 32 should be moved rearwardly to its rear position as shown in Figure 6. This, as is obvious, will turn the ec-A centric sleeves 29 until their high sides are forwardly ythus ,permitting a .slight forward .movement of the connecting

rods

1, 1 so` that the handles I0 can be swung forwardly thus givingV a better leverage as indicated inFigure 8.Y It is to 'be noted that the chain should be adjusted to the exact right height so that the push pins, or

block has the end Vtrunnions Vv28, 28 fand .littefdY Yover these trunnions are' the eccentric sleeves, or cams, 29, 29. Y Y

VFastened to the louter ends of the 'sleeves 29,229 are Ythe `upstanding arms 30, 3e which are .connected to move in-unison by the cross-rod 3| and one of said-arms 30 is extended upwardly forming a hand lever 32. Astrongl pull`spring^33 is connected at its rear end to'one'of the arms Sil and at its V'forward end is attached toa rod `1 and is under sumcient tension to normally tend to pull the arms 3Q forwardly. The rear ends of the connecting Yrods .1 are Yformed with the

circular bearings

34, 34 which Aclosely surround lthe 'ec-l.Y

centric sleeves 29.

Mounted in a suitable transverse bearing in the rear extension |`b there is -a transverse cam 4shaft 35 and fixed to and upstanding from this shaft there is an operating handle 36.V Fixed on this shaft and aligned underneath the respective connecting rods 1 are'the cams 31 on which the Vconnecting `rods rest. Upon manipulation of the A' handle fforwardlythecams 31 will-be turned to` plunger, 25 will exactly align with the pins connecting the chain links. this adjustment, a series of set screws as 4| are provided in the sprocket plate 5 between the sprocket teeth. rThese set screws Aill v.may be Ladjusted to the exact required height .and the -ch-ain when positioned Yin vplace will them. Y f

It is preferable to employ a guide as 42 Afor guiding the push pins, or .plungers '25. This `guide is shaped `substantially .like 'a chain link and has bearings to receive .the push pins .25 and which align with the `chainffpins when said -guide 42 is located on the sprocket plate vas :clearly shownin Figure 1. The 'guide v12, -when positioned iin y place, as Yshown inrFigur-e l, willlabu-t the Yopposing lift therear ends of the connecting rods 1 and to Y thus elevate the ratchet block 26'so Ithat its teeth willfclear the teeth 22. Beh-indthe ratchet block Yand secured to oppositey sides ofthe rear extension Ib', are the

upstanding standards

38, 38 whose upper ends-have aligned bearing-s to receive` the ends of the transverse rod -39 and xed Yon this rodthere is -a dog 40 which may be'engaged with the teeth "22, vas shown in Figures 2 Vand 3, to .prevent-the rearward movement of the rack bar 2l.- Upon elevation of the ratchet block 26,

side link of the chai-n. U-pon manipulation ofithe .handles lil vin a downward direction the 'eccentric spindles, or sleeves, E5 will be turned in a direction indicated by the Larrows in Figures and 13 thus exerting a pull, through the connecting rod 1 on lthe ratchet block-26 .which pull will betra'nsmittedV to the rack bar `2| and through it to the push pins, or plungers, 25 and these will operate against Ythe chain pins as lea forcing the same outwardly as is indicated -i-n Figure l. The handles 1| 0 may then be swung upwardly rota-ting the eccentric spindles, or cams, 5in a direction the reverse of that indicated'by the arrows in Figures 2 and 8. The tension 'on the -connecting Arods 1 will thus be 'relieved and said connecting the arrow in Figure 6,;th-e distance of said rotation as hereinabove explained, and Vupony disengfage-` ment of the dog 4i! fromthe teeth 22'the rack bar 2|, the anchor"v block 24 :and the push pins,v or plu-ngers, '25 may be -retracted or moved the required distance rearwardly.

'I-n operation the chain 'to be operated on'may belo'cated .on the sprocket plate I5 with the sprockets I8 projected upwardly between the links s' of the ichainas shown 2in Figure .3 and the handle lmofved rearwardly sok that the ratchet vblock .26 will -be inits lower position with its teeth en- .gaged with the teeth 22 4and the dog `4U swung into `its forward position, as shown in Figure 2, to engage ithe teeth 22. With the hand lever 32 kinxits forward position, as shown in Figure Y2,

and valso as--shown Vin Figure 7, the high sides of ,the eccentric sleeves '29 will beY Vrearwardly'as shown Yin Figure 7 and the 'high sides of thereobeing determined by thedistance the handlesVV f have 'been elevated. Thereupon the handles 'l0 mayagain be moved downwardly, as before, again moving the rack bar 2 l' and plungers 25 forwardly. When the pins iSd are-oncegunseated, pr started, and do not require so muchpower'to move them, the range of handle stroke may be increased since less power is required and a greater leverage`ac cordingly is permitted. 9

The operation is continuedV until thearm-s 30 approach the limit'go'f their forward movement and the handles lil are then swung upwardly'fto.

the limit of their forward movement asfshown in Figure V2-thus permitting a ina'l forward move; ment ofthe arms 30 which will cause theec- Vcentric sleeves `2Q to move correspondingly 4.into position as shownin Figure f7 with their high sides rearwardly. The rearward movement of the connecting

rods

1, 1 will cause a rearward movement of the ratchet block I2t but thedog'd -willihold the rack bar `2| against rearward'movemen-t thus holding the pushfpins', .or plungers,^l25 against the opposing ends -o'f the chain lpins" 19d;

In order to accomplish 4be .supported -on This rearward movement of the ratchet block 26 will cause its teeth to engage behind the next succeeding corresponding teeth of the rack bar 2 l, or in other words, will cause said ratchet block to take a new hold on the rack bar. The operation is then repeated as before gradually moving the rack bar 2l forwardly and gradually forcing the chain pins lea outwardly. Attention is directed to the fact that upon oscillation of the handles I up and down as above explained, the rack bar 2|, upon each oscillation will move forwardly only a portion of the distance between the teeth 22, the distance of each partial forward movement depending on the range 0f oscillation of the handles lil and this range may be varied depending on the amount of power required to be applied. If the pins 19a are rmly seated and require great power to be moved-the range of oscillation of the handles lll will be less than after the pins have been started and require less power to accomplish their movement.

It is advisable in starting or unseating any chain pins la that short push pins 25 be first used to avoid danger of bending them as would likely happen ii long push pins were used where a maximum power is required. When it becomes necessary to assemble the chain, that is, to force the chain links in place the guide 42 is placed over a sprocket I8 behind, and abutting, a side link of the chain and push pins are fitted loosely through the aligned bearings of all the links so as to maintain them in alignment and the chain pins are then forced, by the head 23, into place, by manipulation of the handles I0 in the manner hereinabove described, said chain pins gradually displacing the aligning push pins previously inserted through the link bearings.

The drawings and description are illustrative merely, while the broad principle of the invention will be defined by the appended claims.

What I claim is:

1. Apparatus of the character described comprising a support, a work holder associated therewith, power delivery means including an oscillatable cam, a connecting rod arranged to be reciprocated by the cam, a plunger adapted to operate against the work on the holder, means for actuating the plunger against the work, means connecting said rod to the actuating means and including a cam and means for actuating said last mentioned cam to permit movement of said rod, relative to said plunger-actuating means, in one direction but to prevent such relative movement in the other direction.

2. Apparatus of the character described comprising a support, a work holder associated therewith, ,power delivery means including an oscillatable cam, a rod having connection with, and adapted to be reciprocated by, the cam, a plunger arranged to be operated against the work on the holder, meansfor actuating the plunger against the work, means engageable with said actuating means and effective to advance the latter, and the plunger, upon movement of said advancing means in one direction, means connecting said rod to the advancing means and including a cam, means constantly tending to actuate Said last mentioned cam to permit movement of the rod relative to the advancing means in one direction and to prevent such relative movement in the other direction, whereby to cause successive effective movements of the advancing means upon reciprocation of the rod.

3. Apparatus of the character described comprising a support, a work holder associated therewith, power delivery means including a reciprocable connecting rod, a plunger adapted to'operate against the work on the holder, means for actuating the plunger against the work, means connecting said rod to the actuating means and including a cam and means for actuating the cam to permit movement of said rod, relative to the plunger-actuating means in one direction but to prevent such relative movement in the other direction.

4. Apparatus of the character described cornprising a support, a work holder associated therewith, power delivery means including a reciprocable connecting rod, a plunger arranged to be operated against the work on the holder, means for actuating the plunger against the work, means engageable with said actuating means and effective to advance the latter and the plunger, upon movement of said advancing means in one direction, means connecting said rod to the advancing means and including a cam, means constantly tending to actuate said cam to permit movement of the rod relative to the advancing means in one direction and to prevent such relative movement in the other direction whereby to cause successive effective movements of the advancing means upon reciprocation of the rod.

5. A chain press comprising a bed, a Work holder therein shaped to receive an anchor, a sprocket chain, a reciprocable handle, a plunger adapted to operate against a chain pin to move the same into or out of the chain link bearings, cams arranged to be oscillated by the handle connecting rods having bearings on said cams whereby oscillation of the cams will reciprocate the rods, a rack bar operable against the plunger and having ratchet teeth, a ratchet block having teeth arranged to co-act with the teeth of said bar, cams oscillatable on the ratchet block, said rods having bearings on the ratchet block cams, means constantly tending to actuate said last mentioned cams to permit movement of the rods relative to the ratchet block in one direction and to prevent such relative movement in the other direction whereby to cause successive effective movements of the ratchet block and rack bar upon reciprocation of said rods.

6. Apparatus of the character described comprising a bed, a work holder thereon, a reciprocable power delivery means, a plunger adapted to operate against the Work on the holder, means connecting the power delivery means to the` plunger and including a member having a Wedgelike action and means for actuating said member to permit movement of the power delivery means relative to the plunger in one direction but to prevent such relative movement in another direction.

7. Apparatus of the character described comprising a bed, a work holder thereon, reciprocable power delivery means, a plunger adapted to operate against the work on the holder, means connecting the .power delivery means to the plunger and including a member having a wedge-like action whereby movement of the power delivery means relative to the plunger is permitted in one direction only.

8. In a chain press having a support, a work holder thereon,` a slidable rack bar movable towards said work holder, a ratchet block having means arranged to co-act with the rack bar, a connecting rod, a cam oscillatable on the ratchet and connecting said rod to the block, means for reciprocating said rod, means tending to actuate the cams to permit movement of the rod relai-revemtsuch relativef movement in the other 'di- Vtivetothe ratchet-,block 'in one direction karid. to

plate havin-g chainholding-s-procket teeth thereon, said plate having arcuate'ends corresponding to the shape of said recess, a tongue on the plate V43o-acting with the groove,V means for aligning sai 5 plate on'the bed.

RICHARD F. KREITER.