US1670761A - Press - Google Patents

Description

May 22, 1928.

J. M. CRAIGO PRESS Filed. Dec. 10, 1924 2 She'BQS-Sht l Swarm Mo's May 22, 1 928.

J. M. cRAleo PRESS Filed 1360- 1 1924 2 Sheets-Sheet 2 a a I w Patented May 22,1928.

eeann UNITE-D vs TATES career; :orri ca,

JOHN M. GRAIGO, OF HARTFORD, CONNECTICUT.

rnnss.

Application filed December 10, 1924. Serial No. 754,947.

The present invention relates to a press for bending, embossing, cutting, or otherwise manipulating metal, and finds peculiar adaptability in dental Work.

The aim of the invention is to provide a press of the character described having various features of novelty and advantage and which is particularly characterized by its efi'ectiveness in operation, its simplicity in construction, and the ease and facility with which it may be set up and operated.

Other vobjects will be in part obvious and in partpointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of ele ments and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of t-he'application of which will be indicated in the appended claims.

In the accompanying drawings, wherein I have shown, for illustrative purposes, one form which 'theinvention may take:

Figure 1 is. a front View of my improved press;

Fig. 2 is a sid view thereof;

Fig. 3 is a view taken substantially on line 3..3 of Fig. 1, and shows the horizontally disposed turret in central Vertical section;

Fig; 4; is a vertical sectional view taken s-ubst-antially on line 44 of Fig. 1, and shows the device for holding the vertically disposed turret in indexed position;

Fig, 5 is a perspective view of a crown and clasp, certain operations on which may be performed by the use of the present'rnachine;

Fig. 6 is a detail view of a-pairof cooperating dies which may be employed to form a stress-breaking lug or projection on the crown of a tooth, the crown and the clasp thereonbeing shown in section, and the parts properly positioned between thedies by the use of; an improved template or guide;

Fig. 7 is a view similar to Fig. 6 but showing the position of the parts when the dies haTve been brought together; and

' 8 is a view showing, in perspective, th die of Fig 6 an in tance f a us to wh my i proved press may be applied, reference may be had to the manufacture of attachments for holding artificial bridges, plates or other ort odqnt a appl ance in the out a more part cularly, to the man factu e of a clasp and crown such as shown in Fig. 5

are made the subject matter ofa separate applicat on. It 1s, of course understood 'of. the accompanying drawings and which that, while the press is herein described as being applied for certain operationsnpon the clasp and crown shown, the press has a more general appl catiomthe present dis.

closure being by way of exemplification only and is not to be taken as restrictive of my conception.

Referring to the drawings in detail, the press is illustrated as having a base 10 from which arises a standardor housing 11 to the forward upper end ofwhich is pivoted, as at12, an operating handle 13. The standard 11 is provided at each side with a pair of guides 14 in which is mounted for vertical sliding movement rods or bars F ixed to-the's'e bars is a ram 17 on the front face of which is fixed a rotatable tool carrying turret The ram is connected to the lever by. a link 19, the arrangement being such that this link and the lever acts in the nature of a toggle so that the desired amount'of power may be obtained when the handle 13 is operated to perform the several punch ing operations. The numeral 20 designates,

generally, a horizontally disposed I turret carried by the] bed 10 rearwardly of the plane of the vertically disposed turret 1?. The turret 18 is journalled on a screw 21, and the turret 20 on a screw'22. Angularly disposed about the periphery of the turret l8 arejthe dies or punches 25 25 25", 25,

and 25 Each of these dies comprises an arm extending radially from the turret 18' and an active die element on the extreme end of the arm. Provided on the turret 20 are the dies 26, 26, 26 and 26 which are adapted to respectively "cooperate with the dies'25, 25225 and 25 of the other turret.

" Each of the dies on the turret 20 comprises an arm extending radially from that turret, each .arm ha-ving on its upper side and adjacent its outer end an active die element or portion. There may be provided adie on the turret 20 for cooperation with the punch 25*. It is, "of course,- unders't'ood that'the number of dies on each turretwill depend upon the particular use-to which the press is to be applied, and't hat the constr -ijction of these dies may be varied, as desired.

For the purpose of holding the vertical turret 18 in any desired indexed position, he u ret is no hedya a B n dapted- 'to selectively engage in these notches is aslidable pin 31 carried by the ram and normally urged into engaging position by a spring 32. When it is desired to rotate the turret 18 to a new indexed position, the pin or plunger 31 may be withdrawn by swinging handle 33 fixed on a rotatable stud 34 having a fin 35 engaging in a notch 36 in the pin. For the purpose of holding the horizontally disposed turret in any pre-.

determined indexed position, this turret is provided with notches 37' in which is adapted to selectively engage a finger or pin 38 carried by a stud 39 rotatably mounted in the bed 10. On the outer end of this stud 39 is a handleetO, the stud being, normally urged into engaging position by a spring 41. It is obvious that the arrangements for holding the turrets in indexed positions may be varied as desired. 4-2 denotes a set screw "for limiting the extent of movement of the op erating lever 13 in a direction to bring the dies into cooperativerelation.

In the present illustrative disclosure, one of the'dies, in the present instance die carried by the vertically disposed turret 18, is offset to the plane of the turret, as disclosed most clearly in Fig. 2, in order to accommodate a set of teeth or bridge work behind that portion of the ram to which the vertical turret is secured, for example, in some 1n-. stances it may be desirable to operate upon a clasp carried at one end of a curved bridge or saddle and, in this instance, there will be sufficient space above thedies to permit the saddle to be held with the clasp between the cooperating dies and the upper end of the saddle behind the turret 18. The ram'immediately above the turret is cut away as at 43 in order to accommodate the offset die 25 when it is desired to rotate the turret.

One or more of the dies may be provided with means for properly locating the work with respect to the dies. In the present instance, this means is conveniently shown as being in the form of a spring finger 45 conrfected by a screw 46 to the arm which carries the die 26 The forward end of this spring lies immediately over the operative part of the die 26 and the cooperating die 25 is recessed as at 47 in order to accomodate the free end of the spring when the dies are brought together, as shown in Fig. 7. It is, of course, understood that this work positioning means may take a form other than that illustrated.

As previously stated, my improved press is peculiarly adapted for use in dental work. For the purpose of explaining one particular use to which the press may be applied, I have shown, in Fig. 5, an attachment for teeth which includes a crown 50 adapted to be connected to a permanent tooth in the mouth and a clasp 51 to which is adapted to be fixed a plate or bridge, not shown...

From this figure, it will be seen that the clasp has a'pair of arms adapted to straddle the crown, and vided with a notch 52 adapted to accommodate a stress-breaking lug or projection 53 on the crown. Each arm of the clasp is further provided with a pair of recesses 54 and 55 which are adapted to receive the respective projections 56 and 57 onthe crown when the clasp is slipped into place.

The operation of the press, when employed for making the crown and clasp just described, briefly as follows, it being understood, however, that the press is adapted for making dentures of other sorts than that here shown. I One pair of cooperating dies; for instance the dies 25 and 26 may be so constructed as to cut out the notches 52. The turrets will, therefore, be indexed so as to bring; the die 25 immediately above the die 26" and,'at'ter the work is positioned between these dies, the lever 13 is moved so as to lower the ram and thereby bring the dies together. The recesses 54 and 55 may then be formed by indexing theturrets so that the dies 25 and 26 are in proper relation, properly positioning the clasp between the dies, and then lowering the ram by mov-' ing the lever 13. The clasp may now be slipped over the crown 50 and positioned between the properly indexed dies 25 and 26 as shown in Fig. 6 for the purpose of form-. ing the rests or stress-breaking bosses 53. The guide or locating device 45 is of the greatest importance in that, by its use, the crown and clasp may be properly positioned with respect to the dies so that the lug 53, which is to be formed, properly registers with a notch 52. This will be clearly understood from Figs. 6, 7 and 8. In Fig. 6, it will be seen that the free end of the spring 45, which is in vertical ,alinement with the punching portion of the die 26 and the recess 47 fits in the notch 52, thereby properly locating this notch with respect to'the dies. hen the boss 53 is formed by bringing'the dies together, the free end of the spring 45 is accommodated by the recess 47 of the upeach of these arms is pro per die so that injury to the indicator or respect to the plane of the turret substantially as described, and means for holding said turrets in indexed positions.

2. In a machine of the character 'described, a bed, an indexible turret thereon provided with angularly disposed dies, means for holding said turret indexed.

positions, a ram mounted for movement towards and away from said turret and axially thereof, an indeXible turret on said ram and disposed at right angles to said first turret, dies about the periphery of said second turret and paired with the first mentioned dies, one of the dies of said second turret being offset from the plane of said turret and a space being provided behind said ram and above said die to accommodate pieces of work, means for holding said second turret in indexed positions, and. means for moving said ram.

3. In a machine of the character described. a pair of turrets disposed in planes normal to each other, the axes of said turrets lying in a plane which is normal to both of said mentioned planes, arms angularly disposed on, and extending radially from, each of said turrets, a die element on the extreme end of each arm of one turret, die elements on the side, and adjacent the outer end of, each arm of the other turret, the outer ends of the last mentioned arms being arranged to be encircled by a crown or the like, the die elements on one turret having cooperativerelation to the respective die elements on the other turret, means for holding said turrets in indexed positions, and means for relatively movlng sald turrets towards and away from each other.

adapted to receive said punching portion,

and a member between said dies for locatmg a piece of work in proper angular positions relative to one of said dies, saidmem-- her being alined with said recess and adapted to move thereinto when the dies are brought together.

5. In combination, an arm adapted to be encircled by a crown or the like and having a male die with a punching portion, a female die movable relative to said male die and having a recess adapted to receive said punching portion, and a spring between said dies for locating the work relative thereto, said spring beingalined with and adapted to move into said recess when the dies are brought together.

JOHN M. CRAIGO.

Images