US1082588A - Work-holder. - Google Patents

Description

0. B. GROSS.

WORK HOLDER.

APPLICATION FILED JUNns, 1907.

1,082,588. Patented Dec. 30, 1913.

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timrnn STATES PATENT enrich.

OWEN B. GROSS, OF AURORA, ILLINOIS.

WORK-HOLDER.

To all whom it may concern Be it known that I, OWEN B. Gnoss, a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Work- Holders, of which the following is a specification.

My invention relates to work holders and refers particularly to appliances adapted to be attached to drill presses and similar machines for the purpose of holding work and especially for gripping the stock upon which work is being done.

The chief objects of my invention are to provide an appliance that can be readily attached to the bed of a machine for the purpose of holding firmly any ordinary piece of work; that can be readily adjusted to be adapted to grip pieces of irregular form, and that will hold the stock securely during all operations thereon.

Further objects of my improved device are to furnish a pivotal attachment for the appliance, in its relation to the machine bed whereby it will be free to be moved about such center for the purpose of adjusting the work to the tool axis, and having means for conveniently locking the apparatus when adjusted; to produce a work holder that will have an unusual range of application, and to provide a strong and durable clamping device so designed that the mechanical movements will be conveniently controlled and that will enable the work to be handled more expeditiously and effectively than with earlier forms of such devices.

I accomplish the above and other important points by the employment of the mechanism illustrated in the accompanying drawing which forms a part of this specification and in which Figure 1 is a side elevation of my improved appliance showing method of at taching it to the bed plate of a machine with the parts 39, 40 and 4:1 removed; Fig. 2 is a top plan view; Fig. 3 is a sectional view on the line 33 of Fig. 2; Fig. 4 is a per spective view of a support used especially in drilling; Fig. 5 is a side elevation of one of the clamping screws with attached wrench, and Fig. 6 is a perspective view of a jig for holding rods and similar turret pieces.

Referring to the drawing in detail, the numeral 10 indicates a base plate having downwardly turned marginal flanges 11 Specification of Letters Patent.

Application filed June 6,

Patented Dec. 3&9, 1913. 1907. Serial No. 377,540.

j which rest upon the bed 12 of the machine I and support said plate above the bed face. About the middle third of the plate 10 the margins are supplied with longitudinal parallel vertical flanges 13 and adjacent thereto is a transverse wall or flange 14 which rises from the surface of the plate and extends entirely across from one side of the plate to the other. The flanges 11. 13, and the wall 14 are formed integral with the plate and the flanges 13 and wall 1 1 form three sides of a rectangular box, which forms the working area of the apparatus. In order to afford a pivotal connection with the bed plate 12, a square post 15 has projecting from the inner side a lug 16 which is received in a slot 17 formed in a side flange 11, the lower end of the post being rounded so as to fit into any one of numerous holes 19 usually provided in the bed or drill table 12. To prevent displacement of the lug 16 its inner end is riveted or upset so that the said lug will have sliding engagement with the slot 17.

Retaining bolts 20, 21, each having a head 22 flattened upon opposite sides and furnished with threads 23 are adapted to engage longitudinal median slots 24 formed in each end of the plate 10, the middle of each slot having a wider portion 25 to admit the head 22 of the bolt which is then passed through corresponding suitable slots in the bed of the machine. One of these bolts is furnished with a nut 26 to which is pivotally connected a handle or wrench 27 provided with a forked end for attachment to the said nut. The nut 28 for the companion bolt is turned by a common wrench since an attached handle would not be so convenient owing to the location of said bolt and nut beneath an adjusting screw hereinafter described.

To the face of the plate 10 in the open side of said rectangular box is attached a post 29 having its upper end bored to form a box or nut for an adjusting screw 30 the head 31 being flattened to afl'ord a finger grip by means of which it can be quickly turned. The thread of this screw is preferably of square form and the end of the body is furnished with a clamping or bearing block 32 with which said screw has a swivel connection of any well known form which attaches the said block to the screw so that it will follow the movements of the latter. To the said block 32 is attached a transverse clamping plate 33 which extends laterally across said box and its ends rest upon the upper margins of the side flanges 13 and having sliding connection therewith being kept in apposition by a wing 3a which has a lateral flange adapted to engage grooves 35 channeled in the outside faces of said flanges 13.

In the median line of the plate 10 the wall 14 is furnished with a set screw 36 the head of which is supplied with an attached wrench 37 formed on the lines of the wrench 27 attached to said nut 26. The free or engaging end of said set screw has a concave face 38 to form a holding center.

In Fig. 2 is shown the method of applying a detachable rest or support for use when small pieces or forms are to be drilled, and the device is shown detached in Fig. 4. A rectangular plate 39 fits loosely between the side flanges 13 and upon its upper face are secured two plates 40, 41 of thinner material, pivotally attached to the said rectangular plate by a rivet 42. The sides of the plate 40 are turned upward to form vertical flanges 40 and one of the sides of the superimposed plate 41 also has a flange t1, the upper margins of the three flanges being made the same height above the face of the plate 39.

In one of the flanges 13 is provided a threaded hole 4-3 adapted to receive the set screw 36 which is interchangeable between the hole in the part 14: and said hole 4:3.

A removable center 4% engages a hole 45 formed in the plate 10 within the said working area or box, said center, of course, being removed when other attachments are applied.

In Fig. 6 is shown a centering block or jig as useful for holding rods and similar pieces, the method of applying said jig being clearly shown in Fig. 1. The said block is provided with transverse and longitudinal grooves 47, 4S and 49, which are angular in cross section.

The manner of using my improved appliance will be readily understood by any one versed in the art to which the device belongs.

The plate 39 is used in drilling, the stock and jig resting upon the upper margin of the flanges 40 41 and as the superimposed plates 40, 41, are movable laterally on their common pivot they may be shifted from time to time to prevent the drill from com ing in contact therewith, and they serve an especially useful purpose in supporting the part to be operated upon when it is thin and requires a central rest.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. A work holder consisting of a base member and plates of relatively thin material superposed on said base member, said plates having flanges at right angles to their bottom portions, the flanges of one plate being spaced from the flanges of the other plate, substantially in the manner and for the purpose set forth.

2. A work holder consisting of a base member, a plate pivotally mounted on said base member, said plate having parallel marginal flanges along its opposite sides, a second plate superposed on said first plate and pivotally mounted thereon and having a marginal flange extending therefrom, said plates adapted for independent adjustment. In testimony whereof I afliX my signature in the presence of two witnesses.

OWEN B. GROSS.

Witnesses E. E. BOUSLOUGH, SHERMAN MULLEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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