US469621A

US469621A - alker

Info

Publication number: US469621A
Authority: US
Publication date: 1892-02-23
Anticipated expiration: 1909-02-23

Description

(No Model.) 2 Sheets-Sheet 1.

' J. H. ALKER.

MANUFACTURE OF GATE HOOKS.

No. 469,621. Patented Feb. 23, 1892.

wnuessss INVENTOR Wm m 47 MMMM (No Model.) I 2 shts sheet 2. J. H. ALKER. MANUFACTURE OF GATE HOOKS.

No. 469,621. Patented Feb.- 23, 1892.

WITNESSES IFVENTOR 644; ,W, MM

I I aura/41 74 UNIT D STATES PATENT OFFICE.

JOHN H. ALKER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE OLIVER IRON AND STEEL COMPANY, OF SAME PLACE.

MANUFACTURE OF GATE-HOOKS.

SPECIFICATION forming part of Letters Patent No. 469,621, dated February 23, 1892.

Application filed December 19, 1891. Serial No. 415,653. (No model.)

To whom, it may concern: 4' on the lower inner edge of the die and an Be it known that I, JOHN H. ALKER, of angled portion 4"extending upward and out- Pittsburg, in the county of Allegheny and ward at an acute angle thereto and upon the State of Pennsylvania, have invented a new inner face of the die. The groove 10 exactly and useful Improvement in the Manufacture corresponds thereto, andimmediatelybeneath 55 of Gate-Hooks, of which the following is a full, the groove 4 is the stop 12, which is suitably clear, and exact description, reference being secured to the frame of the machine and is had to the accompanying drawings, forming preferably vertically adjustable. In the rear part of this specification, in which of the clamping-diesis the plunger-die 13, the

IO Figure 1 is a top plan view of my improved lower extension 14 of which moves beneath 60 dies in retracted position. Fig. 2 is a front the clamping-dies, and the groove 15 of which elevation, and Fig. 3 a side view, of the same registers with the horizontal portions of the with one clamping-die removed. Fig. 4 is a grooves 4 and when the clamping-dies are view of the blank after the bending operaclosed. Above the part 14 is the head 16,

15 tion, and Figs. 5 and 6 are views of the finhaving upon its front face thegroove 17, which 65 ished article. terminates in an enlarged recess 18 with out- Like symbolsof referenceindicatelike parts wardly-tapering cone-shaped sides. This rein each. cess registers with the hole formed by the My invention relates to the manufacture of grooves 6 and 11 when the clamping-dies are 20 gate-hooks or the pin portions of gateclosed and forms the head upon the finished 7o hinges; and it consists in improved dies article: whereby the finished hook is produced from The operation is as follows: A bar beinginthe blank by two strokes of the plunger-die serted in the groove 4, the movable die 3 is and also in the improved method of forming reciprocated by suitable mechanism and such hooks, as hereinafter more fully declamps the rod in the

grooves

4 and 10, it 7 5 scribed, and set forth in the claims. standing therein at a slight angle to the ver- In the drawings,2 represents the stationary tical. The plunger-die is then reciprocated, and 3 the movable clamping-die. The die v2 and the extension 14, striking the lower part in its front portion is provided with the anof the bar, bends the same up into the hori- 0 gled groove 4 and in the rear thereof with zontal portions of the

grooves

4 and 10, the the jog or offset 5. In the rear of the offset is groove 15 being suitably curved downwardly the horizontal groove 6, which terminates in at its outer end, so as to prevent cutting of the a concave recess 7, which is located partly bar. The movable clamping-die is then rebeneath the groove and partly in the shoultracted and the blank removed, it then being 35 der formed by the offset. Immediately bein the form of Fig. 4. The plunger-die havneath the groove .6 is the projecting pin 8, ing been retracted, this blank is then inserted which enters a corresponding aperture 9 in in the groove 6 and rests upon the pin Suntil the movable die 3. This pin serves both as clamped by the movable die 3. The plunger- 'a stop for introducing the blank into the die then moves forward again and the angu- 0 groove and sustaining it until the movable lar portion of the blank is pressed into the die clamps it in position and also as a guide head by the recess 18, while at the same time for the movable die to produce an exact regthe inner end of the blank is rounded by comistering of the two clamping-dies. The movpression againstthe concave recess 7, the hook able clamping-die is providedwith thegrooves of Figs. 5 and 6 resulting. The object of 4 5 10 and 11, corresponding to the grooves4 and bending the two portions of the bar at an 5 6 in the stationary die, and when the dies are acute angle to each other is that enough metal closed these grooves form holes in which the may be obtained at the angle to form the head blank is placed. upon the hook. Moreover, in this way the As is clearly shown in Fig. 3, the groove 4 vertical part of the blank is prevented from 50 consists of two portions, a horizontal portion being pushed upward, as in the old method,

and the hook is formed by one stroke, where before several strokes of the plunger-die were necessary to produce the head.

The advantages of the device are obvious. The parts are simple, few in number, and not liable to get out of order, while the entire action is automatic.

Many changes may be made in the form and arrangement of the parts without departing from my invention, since that I claim is 1. The combination, ,with clamping-dies having registering grooves, of a plunger-die arranged to move across the end of the hole formed by said grooves, substantially as and for the purposes described.

2. The combination, with clampingdies having corresponding grooves, the two por tions of which extend at an angle to each other, of a reciprocating die having a groove arranged to register with one of said portions, substantially as and for the purposes described.

3. The combination, with clamping-dies having mating grooves upon their lower inner edges and corresponding grooves extending upwardlyat an acute angle thereto, of a plungendie having a groove arranged to r'egister with the grooves upon the lower edges of the clamping-dies, substantially as and for the purposes described.

4. The combination, with clampingdies having registering grooves, of a plunger-die having a recess arranged to register with the ends of the grooves and a groove extending from such recess, substantially as and for the purposes described.

5. The combination, with clampingdies having registering grooves and a pin and corresponding hole immediately beneath the same, of a plunger-die having a recess arranged to register with the ends of the grooves and a groove extending from such recess, subsubstantially as described.

6. The combination, with clamping-dies having registering grooves and a stop beneath the same, of a plunger-die arranged to move across the end of the hole formed by said grooves, substantially as and for the purposes described.

7. The combination, with clamping-dies having registering grooves and an adjustable stop beneath the same, of a plunger-die arranged to move across the end of the hole formed by said grooves, substantially as and for the purposes described.

8. The combination, with clamping-dies having two sets of registering grooves, of a plunger-die having an extension arranged to move past the end of one set of grooves and a recess arranged to register with the end of the aperture formed by the other set, substantially as and for the purposes described.

9. The combination, with clamping-dies having two sets of registering grooves, of a plunger-die having a grooved extension arranged to move past the end of one set of grooves, and a recess arranged to register with the end of the aperture formed by the other set, substantially as and for the purposes described.

10. The method of making gate-hooks, consisting in bending a portion of a blank at an acute angle to the remaining portion and then shaping the angled part into a head, substantially as and for the purposes described.

11. The method of making gate-hooks, consisting in bending a portion of a blank at an acute angle to the remaining portion, then shaping the angled part into a head, and at the same time rounding one end of the blank, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 15th day of December, A. D. 1891.

JOHN II. ALKER.

Vitnesses:

. W. B. CORWIN,

H. M. CoRwIN.