US1454497A - Power press - Google Patents

Description

May 8, 1923.

S. T. WALKUP POWER PRESS Filed May 20 1919 4 Sheets-Sheet May 8, 1923.

POWER PRESS Filed May 20, 1919 S. T. WALKUP 4 Sheets-Sheet 2 v 9/ J6 a7 S. T. WALKUP May 8, 1923.

POWER PRES S 4 Sheets-Sheet 5 Fil y 20. 1919 May 8, 1923. 1,454,497 S. T. WALKUP POWER PRESS Filed May 20, 1919 4 Sheets-Sheet 4 anbmtoz Patented. ay 8, 1923.

SAMUEL THOMAS WALKUP, on niiw'YoRK; 1v.

rowna rnnss'.

Application filed May 20, 1919. Serial No. 298,491.

To all whom it may concern:

Be it known that SAMUEL THOMAS WALIg- UP, a citizen of the United States, and res1- dent of city of New York, in the county of New York and State ofNew York. have invented certain new and useful Power Presses, of which the following is a specification;

This invention relates to presses being intendedmore particularly for pressing out artificial leaves or flowers from suitable blanks although not necessarily limited to such use. Heretofore such work has been done by hand operated presses and the present invention has for an object to provide a simple form of press by which artificial leaves, flowers and the like can be rapidly and efficiently pressed out. I -For further comprehension of the-invention. and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claimsin which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a front View of an artificial flower press constructed according to my invention.

ilg. Qis a side View thereof.

Fig. 3 is an enlarged fragmentary side Fig. 4 is a transverse sectionon the line 4-4 of Fig. 3.

Fig. 5 is a detail horizontal section showing the die carriage operating means.

Fig. 6-is a detail vertical section showinga. different part of the die carriage operating means.

Fig. 7 is a detail horizontal section showing the punch lever operating means.

Fig-8 is a fragmentary transverse section through the-die block and die carriage showing the mounting of the die on the latter.

Fig. 9 is a side view of a presser head which may be substituted for thejpunch under certain conditions.

vFigxlO is a plan'view thereof.

Fig. 11 is a diagram showing the electrical connections.

F- igures 12 and 13 are partial views. simi lar to Fig.- 2, showing, respectively, two positions ofcertain. parts seen 1n that figure and illustrating their action when the apparatus is operated.

As here shown my improved press comprises a standard 1 which may be secured in any desired manner ona suitable table 2, this standard having an overhang?) provided with an ordinary dovetail groove to receive a traveling head 4 adapted to carry The standard 1 is suitably the punch. slotted as at 5 to receive a punch operating lever-6 of bell-crank shape which is fulcrumed as at 6 in the standard a short distance to the rear of the head 1, which latter is slotted as at 4: to receive the rou'ndedend of the short horizontal arm 6 of the lever whereby the head isoperated. the long vertical arm of the lever extending down below the table 2. These parts may be of known construction, no novelty being claimed for the specific construction'thereof.

The head 4 has a recess 7 in its bottom to receive-freely the threaded stem 8 of a punchB. Upon this stem S is screwed a collar 9 which takes the thrust'of. the punch on the part This collar may be locked in place by a set screw 10, while the stem 8 may beseeured in the recess? by a set screw 11 threaded through the Wall of the head 4. The punch 8 may have the usual felt facinrrlQ.

Secured upon the laterally projecting base and having nuts 17 screwed on their ends.

The die carriage is here in the form of a rectangularp'late which rests freely on the block 13 and is provided on opposite sides.

with depending flanges 20 which engage the sides of the block andprevent transverse displacement of the carriage.

This carriage is adapted to have a suitable die 21-carried thereon the die being permanently fixed on aplate 22 which lat ter is secured to the carriage by screws 23 wh h pro ect fr m the latter through suitable openings 24 in the plate and have nuts 25 threaded on their ends. The holes 24 are preferably of slightly larger diameter than the screws 23 to permit of accurate positioning of the die under the punch, while eliminating the necessity for extreme accuracy in fitting the die on the plate.

The head 4 is shown with an upwardly projecting screw threaded stem 26 which passes freely through thehorizontal portion of an angular projection 27 on the standard 1, and has a nut 28 threaded thereon.

The die carriage 14 is adapted to carrying the die under and away fromthe punch with each stroke of the latter and to this end a pair of rods 30' are pivoted at one end to opposite sides or" the die carriage and extend rearwardly beside the standard 1 and are operatively connected to the upper ends ott a'pair of levers 31 which are fulcrumed at their lower ends as at '32 to brackets 33 depending from the table 2. The operative connection between the rods and levers is efi'ected by pivotally connecting the upper ends of the levers 31 to the rods. Collars 36 and 37 are adjustably secured, as by the set-screws 38 and 39 to the rods 30 on opposite sides of the sleeves 34, coiled springs 40 and 41 being interposed between each of these collars and the sleeves, a yielding operative connection being thus effected be-, tween the levers 31 and rods 30.

The levers are operated from the vertical arm of the punch operating lever and preferably in such a manner as to cause a rapid initialmovement of the die carriage toward the punch and a relatively short "move ment'ot the sleeves 34 on the rods 31 after the. die carriage comes to rest, the levers 31 being longitudinally slotted as at 45 to receive the rollers 46 carried on the ends of a pin 47 fixed between its ends to the lever 6 and passing through a vertical slot 48 in the latter. The pin 47 may be secured to the lever 6 by means of nuts 49 screwed on the enlarged central part 47 of the pin and bearing on opposite sides of the lever, washers 50 being interposed between the lever and nuts. As will be apparent the throw of the levers 31 and in consequence the rapidity of movement of the die carriage 14 may be varied by adjusting the pin 47in the slot 48.

A stop member is carried upon the die carriage-and co-operates with the vertical wall of the standard l'to position the carriage properly under-the punch at the inner having a lock nut 52 threaded thereon. The

' outwardmovement of the carriage may be limited by stops 53 on the outer end of the block 13. Y

To reciprocate the punch lever 6 I provide a pair of crank arms connected by a wrist pin 61 on which is a roller 62 which engages in a slot formed between a pair of spaced straps 63 and 64 secured at their ends to the lever 6, a rubber cushion 65 being interposed between straps 64 and the lever arm. It is obvious that the crank arms 60 with their pin and slot connection with the lever 6 which operates the presser head 4 form a double acting toggle, a toggle action occurring, as will be apparent, at each end of the movement of the lever as the presser' head is at its lowest and highest points of travel and whenthe crank arms 60 are at right angles to the lever. The crank arms are supported in a suitable frame 66 and are rotated by a suitable electric motor 67 tract spring 76 and move it away from a contact 77 and so simultaneously open the motor circuit and apply the brake. I preterably employ a speed regulating device to control the speed of operation of the punch which may be in the form of the rheostat? 8 shown in Fig. 11. p

Should it'be desired to use the press-with the hand adjusted punch'and die units in commonnse in this art a disc 80 having a stem 81 may be secured to the head 4 in place of the punch 8 the stern 80 being adapted to have the collar 9 screwed thereon and to be secured in place similarly to the stern 81.

The operation of my improved press will,

it is believed be apparent, from the above 3' description, the motor causing the lever arm 6 to be reciprocated and operate the punch. By reason of the rubber pad 65 the blow of the punch upon the blank being pressed is softened while the strain on the motor is lessened. Asthe punch 8 starts its downward movement the carriage 14 starts its inward movement. At the start of this move ment the pin 47 is relatively near the fulcrum point 32 of the levers 31 and its path of movement is approximately at right angles to the slots 45 while as the punch head descends the pin 47 moves away from the fulcrum point 32 and its path of movement is at a constantly decreasing inclination to the slots 45, this being apparent from a consid-' eration of Figs. 2 and 3 of the drawings.

As a consequence the carriage will have come to the limit of its travel with the screw 51 against the standard 1 before the punch has reached th die while the further movementvof'the levers3l asthe punch completes its'descent results in moving the sleeves 34 along the rods 30' and compressing-springs a1 will be comparatively small. Upon the return stroke the punch will have clearedthe die before the levers 31 return sufliciently to throw the carriage back. 4

I claim as my invention.

1. In a press, a punch, a lever for operating said punch, a die, a reciprocatory carriage for said die, means operatively connecting said punch operating lever to said die carriag whereby the former moves the latter into and out of position under the punch co-incide-ntly with the respective advancing and receding movements of the punch, and means limiting the movement of the carriage to position the die under the punch.

2. In a press, a punch, a lever for operating said punch, a die, a reciprocatory carriage for said die, means operatively connecting said punch operating lever to said die carriage whereby the former moves the latter into and out of position under the punch co-incidently with the respective advancing and receding movements of the punch, means limiting the movement of the carriage to position the die under the punch, and means yieldingly holding the carriage against such limiting means.

3. In a press, a punch, a die, a leverfor operating said punch, and means operatively connecting said punch operating lever and die whereby the former moves the latter into and out of operative relation to said pun-ch co-incidently with the advancing and receding movements of the latter.

4. In a press, a punch, a die, means for operating said punch, and means for moving said die into and out of operative relation to said punch co-incidently with the advancing and receding movements of the latter, said last means being adapted to cause a relatively varying movement of the punch and die with the die having a rapid initial movement.

5. In a press, a punch, a die, means for operating said punch, and means for moving said die into and out of operative relation to said punch co-incidently with the advancing and receding movements of the latter, said means including a lever, and a device adapted to operate said lever by sliding movement thereon.

6. In a press, a punch, a die, means for operating said punch, a carriage for said die, a pair of rods connected to said carriage, a pair of levers yieldingly connected to said rods, and devices operated by the punch operated by the punch operating means engaging said levers to operate the same, the point of engagement of said devices with the said levers changing as the punch moves.

7. In a press, a punch, a die, means for operating j 'said' punch, a carriage *fbr'said die, a pair of rods "connected to said carriage, apair'of levers yieldingly "connected to said rods, and devicesoperated the punch operat'ing'means engaging said levers' 'to operate the same, the point of engagement of the said devices withthe'said levers changing as the punch moves, said yielding connection comprising sleeves slidable on the said rods and having the said levers connected thereto, and spring devices localizing the said sleeves on the said rods.

8. In a press, a punch, an operating lever for said punch, a cushion extending along oneside of said lever, a strip covering said cushion, a second strip secured to the lever and spaced apart from the first strip, and a crank member engaging between the said strips to operate the said lever.

10. In a press, a punch, an operating lever for said punch, a cushion extending along one side of said lever, a strip covering said cushion, a second strip secured to the lever and spaced apart from the first strip, and a crank member engaging between said strips to operate said lever, said crank member including a wrist wrist pin.

11. In a press, a punch, means for operating said punch, a die normally positioned to one side of the path of movement of the said punch, means for imparting reciprocatory movement to said die whereby it is caused to' move into the path of movement of the punch to be engaged thereby and then back to normal position after the punch has disengaged therefrom, said die moving means being operated by and in unison with the punch operating lever.

12. The combinationwith die, of a co-' acting punch member movingin a'guideway,

of a lever pivoted between its ends, having on arm approximately perpendicular to the path of the punch and connected to the latter to move it in its guideway, and a power ac tuated crank in sliding engagement with the other arm and arranged to swing it positively in opposite directions from the perpendicular to the lever surfaces along which it slides, said perpendicular being reached when the punch reaches either limit of its path. v 1 I 13. The combination with a die and a co acting punch, of a lever-having one arm approximately perpendicular to the path of the punch and pivotally connected thereto,

the lever itself being pivoted between its ends to move the punch to and from its extreme positions, and. a member engaging the other lever arm and pivoted at some dis: Signed at city of New York, in the county tance therefrom in a line approximately per-- of New York and State of New York, this pendicular to the arms axis when the punch lath day of May, A. D. 1919.

is at either limit of its path; whereby the SAMUEL THOMAS WALKUP. 5 force exerted by said member rapidly in- Witnesses:

creases when its point of engagement with A. E. SHERIDAN,

the arm approaches said line. N. PENCE.

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