US1261973A - Electric riveting-machine. - Google Patents

Description

A. C. TAYLOR.

ELECTRIC RIVETING MACHINE.

APPLICATION FILED sEPT.1.9,1916.

1 ,2@ 1,973 Patented Apr. 9, 1918.

4- $HEETS-SHEET 1- WITNESS INVENTOH $10. 6. 7 "uum A. C Taylaz A TTORNEVJ 'A. C,-. TAYLOR.

ELECTRIC RIVETING MACHINE.

APPLICATION FILED SEPT-19,1916.

1 ,26 1,973. Patented Apr. 9, 1918.

4 SHEETS-SHEET 2.

IN VEN TOR. WITNESS, flC T411107? ATTORNEYS.

A. C. TAYLOR.

ELECTRIC'RIVETING MACHINE.

APPLICATION FILED SEPT. 19, 1916.

Patented Apr. 9, 1918 4 SHEE'TS-SHEET 3- INVENTOH fl. 6 Tay 702i? BY EWW 5 ATTORNEY A. C. TAYLOR.

ELECTRIC RIVETINC MACHINE.

APPLICATION mm SEPT-19.19716.

1,26 1,97 3. Patented Apr; 9, I918.

, 4 SHEETS-SHEET 4- E i V/I/IIII "I",

bun 1&8 4 5 4 WITNESS A TTORNE 5/5.-

UNITED sTA'rns rATENf-r OFFICE- ALBERTIS C. TAYLOR, OF WARREN, OHIO, ASSIGNOR '10 THE WINFIELD MANUFAC- TUBING COMPANY, OF WARREN, OHIO, A CORPORATION.

ELECTRIC RIVETING-MACHINE.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed September 19, 1916. Serial No. 121,027.

Warren, in' the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Electric Riveting-Machines, of which the following is a specification.

Th1s invention is an lmprovement 1n electric riveting machines, and related to the machines shown in co-temporaneous applications filed by me and bearing Ser. Nos. 121,025 and 121,026, respectlvely. The present application differentiates from both said applications in both the manual and the power mechanism through which the riveting is effected and as hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a front elevation of the machine, and Fig. 2 is a vertical sectional elevation thereof. Fig. 3 is a plan view on a line corresponding toline 3-3, Fig. 2. Fig. 4 is a side elevation of the upper portion of the machine looking in from the left of Fig. l, and with the band wheel removed and the main shaft cross sectioned. Fig. 5 is a sectional elevation of the clutch mechanism on the line of the power shaft, and Fig. 6 is a cross section of Fig. 5 showing the relation of the trigger thereon. Figs. 7 and 8 are details of the dog and the bolt connected with the clutch, as hereinafter described.

The construction herein, as in the said applications, employs two electrodes or dies at and I), though there are two lower dies 12 in this case instead of one and which are adapted to be used alternately or successively at will and according as the upper electrode may be brought into line with either, as

- hereinafter fully described. The lower electrodes are stationary and the upper one is movable vertically and laterally within limits, the vertical movement being, first, through the lever 3 and mechanism connecting the same operatively with the said electrode a and, secondly, through or by power exerted primarily through main shaft S, also as hereinafter more particularly described.

The plan of the machine provides for 8 to an upsetting temperature, and current for this purpose is supplied through suitable electrical connections communicating with and through the said-electrodes and the usual transformer 6 having the laminated or other suitable connections 4 therewith.

The heating of the said rivet by the means provided is practically instantaneous, so that the current is no sooner closed thereon than that the initial upsetting of the rivet on the stock can proceed. This is accomplished through lever 3, which is hung on a swinging link 5 pivoted on the head hand adapted to travel up and down with said head while the operating end thereof is .pivotally en'- gaged with a rod or bar 6 slidably mounted in two arms 7 on the main frame or body B. The said rod has a spiral spring 8 about its lower end adapted to draw said rod down after actuation or raising thereof by said lever to close the circuit at the electrical contacts or contact members 0 and c, andfurther movement of said lever in the same direction serves to throw the 'clutch mechanism into action for engagement with the power shaft and to complete theriveting by power, as will presently be seen. 3

The electrical contact member 0 is pivoted between its ends on the main frame and adapted to be tilted into contacting relation with member 0 by means of a depending arm 9 fixed onrod 6 and which has a tooth 10 adapted to make a limited lifting and wiping engagement with a spur 12 fixed on the part c, the distance or duration of such engagement being suliicient to close contact on member 0 and to depress said member more or less againstits own spring 13. This being accomplished the engagement at l0, l2 ends through the further lift of rod 6 for further operating effects and spring 14 on contact member 0 instantly retracts said member and breaks the contact. The duration of contact is timed to the momentary period required to heat the rivet to an upsetting temperature.

In this operation through lever 3 the fulcrum of said lever is on the link 5 and action is against spring 8 on rod 6, but immediately before this action occurs the lever 3 has its fulcrum on said rod and serves to lower head it with the upper electrode 0 onto the rivet. The spring 8 is stronger in its resistance than the pressure required to and which head has a forward projection or foot 21 for this purpose. The said plates 18 and 20 are in the circuit with the laminated connections 4 running to the transformer .and plate '18 is adapted to be swung laterally to bring electrode a over either of the two lower electrodes. initial movement or depression of lever 3 with its fulcrum in rod 6 the head h will be lowered to rest electrode a. on the rivet, and then by a further depression with the fulcrum transferred to link 5 the rod (3 is raised against its spring and closes the elec tric circuit at c e. TheneXt step-- continues the depression of lever 3 because by this time the rivet is ready to be upset on the. stock .9 and lever 3 also does this work, but immediately after cutting off the current at the said contacts. Then as the said lever concludes its three several functions as above enumerated it performs the fourth and last one of setting the power mechanism into action. This'occurs instantly with the depression of said lever as it upsets the rivet.

Power is communicated to the machine by shaft S and band wheel to free torotate thereon, and said shaft has a slight crank 'upon which a connecting rod 23 is mounted and which operates the, pivoted arm 25. The said arm has a recess in which the coupling'rod is pivoted on a bearing 26 and which is adapted to raise and lower said arm within limits.

A dog 28 is pivoted in the end of said arm and adapted to swing out into engagement at its lower end with a projection 29 on a depressible bar or rod 30 supported in the rear of head 72, by means of a rubber or like cushion 31 bearing on the top of said head. A strap 32 is fixed across the body B at its ends behind said head h and bar 30 and serves to engage and tilt the dog 28 back out of line with the projection or lug 29 when the dog is raised, thus leaving head it and the bar 30 thereon free to be raised as high as may be necessary to introduce the stock 8. Then as Said head is lowered and power is to be applied thereto the arm 25 is swung down, the dog 28 is thrown forward by spring 33 into the path of lug 29 and the head 7b is accordingly depressed to complete the riveting operation. The bar 30 has a nut threaded on its upper end to adjust it'to the right working pressure. On the return stroke the arm and dog stop rela- It follows that at the tively as seen in Fig. 2 and remain in this position until power is again thrown on and the action just described is repeated.

Engagement with the JOWGI shaft is made by means of a clutch mec ianism thereon and which is initiated by lever 3, as above indi cated. Thus, the said lever is shown as having an adjustable set screw 35 in its outer end adapted to engage the end of lever 40 and to rotate said lever on its pivot in body B a sufficient distance to disengage the dog 39 from the wheel engaging bolt 41. The said bolt is adapted to enter a recess or hole 522 in the hub of wheel to and thus connect said wheel with shaft S. The said lever 10 has a trigger 38 pivoted therein between its ends and the end of said trigger has a tooth 15 adapted to engage in a depression or hole in said dog into which it drops under pressure by spring 45 and which normally holds 86 said trigger in engagement with said dog, thus making the trigger an operating part of lever d0 to withdraw the dog from bolt 41.

Thesaid bolt being thus released from its retired and disengaging position as to the 90 wheel V, it is ready to engage in the hole 42 in said wheel when it revolves into line therewith and this makes clutch engagement with shaft S and power proceeds therefrom to head it and electrode a as above described. But it is desirable not to have the head depressed twice successively in any operation, and to prevent such repetition I provide for withdrawal of the bolt practically before the shaft has made a complete revolution by means of a cam 16 on the wheel hub which engages a beveled lug 17 on the trigger and serves to withdraw said trigger from the dog 39. Then as the bolt is carried around a short distance by wheel W the beveled shoulder 50 thereon engages the be\' eled surface 51 on the said dog and the bolt is withdrawn by this engagement from the wheel and pressed back far enough to be again engaged by the dog and locked in retirement. It should have been noted that bolt 41 is housed in a. collar 53 on shaft S, and that said bolt has a spring 5% by which it is pressed forward when released. Springs 55 bear against the dog 39. It follows that the release of the clutch mechanism is automatic and positive, andengagement thereof with the shaft occurs automatically al-So after the initial movement by lever &0, which releases dog 39 and enables the bolt to take engaging position.

\Vhat I claim is:

1. An electric riveting machine as described having a slidable head and an electrode thereon, a. lever pivoted on said head and movable therewith. and means operatively connected with said lever, to turn the current on said electrode when the joint movement of said head and lover is arrested.

2. An electric riveting machine as demember and said head, power mechanism to operate said head having a clutch, and means in engaging relation with said lever adapted to throw in the clutch subsequent to turning on the electric current..

4. An electric riveting machine as described comprising a slidable head and an electrode thereon, a slidable rod andelectrical contact member in actuating relations therewith and a lever pivoted on said head and to said slidable rod and adapted to actuate both successively.

5. An electric riveting machine as described having a slidable head and an electrode thereon, a lever pivoted on said head and a slidable spring pressed rod at the end of said lever and serving as a fulcrum therefor to operate said head.

6. An electric riveting machine as described comprising a slidable head and an electrode thereon, a lever. havinglink pivot connection with said head between its ends,

a slidable rod engaged with the end of said lever having fixed vertical bearings and a spring on said rod constructed and arranged to resist endwise movement thereof by said lever.

7. An electric riveting machine as described having a slidable head and an electrode thereon, a lever pivoted on said head and a slidable rod engaged by said lever, in combination with means to close the current on said electrode comprising a pivoted contact member in working relations with said lever.

8. An electric riveting machine as described having a slidable head and an electrode thereon, a lever pivoted on said head and a slidable rod pivotally connected with the end of said lever, in combination with means to close the electric circuit on 'said electrode comprising a set of contact members, one of saidmembers and a projection on said rod having a wiping engagement.

9. An electric riveting machine as de* scribed having an electrical current closing mechanism comprising a depressible contact member and a pivoted member adapted to contact therewith, a slidable rod and an arm electrode thereon and a lever to operate said head, in combination with a power shaft and a wheel free thereon and clutch mechanism for said shaft and wheel, an electric switch to place said electrode in an electric circuit, means connected with said lever to operate said switch, and means operated by the same lever to throw the clutch into action.

11. An electric riveting machine as described having a slidable head and an electrod thereon and a lever adapted to raise and lower said head, in combination with power mechanism and means to operatively engage the same with said head having a member adapted to be engaged by said lever to set said mechanism in motion.

12. An electric riveting machine as described having a slidable head and an electrode thereon, a hand lever pivoted on said head, in combination with a power shaft and a wheel thereon and a train of clutch mechanism connecting said shaft with said wheel comprising a pivoted lever operatively engageable by said hand lever and adapted to set said train of clutch mechanism in motion.

18. An electric riveting machine as described having a slidable head and an electrode thereon and power mechanism to depress said head comprising a part having a cushioned support on said head and means to engage said part and depress the same and thereby depress said head and electrode.

14. An electric riveting machine as described having a slidable head and an electrode thereon, in combination with a part mounted on said head, a dog adapted to engagesaid part and depress the said head through the same, an arm on which said dog is pivoted and power connections to actuate the said arm.

15. An electric riveting machine as described having a sliding head and an electrode thereon, a bar in the rear of said head having a cushion support on the head and provided with 'a projection at its bottom, and power actuated mechanism having a member adapted to engage said projection and thereby depress said head and electrode.

16. An electric riveting machine as described having a pair of fixed lower'electrodes and a single upper electrode, a slidable head and means thereon adapted to bring said upper electrode into working relations with either of-said lower electrodes.

17. In an electric riveting machine, a set of electrodes, a slidable head carrying one of said electrodes, a hand lever having a yielding fulcrum and connected to said head, a power shaft, a device in striking relation with said head, clutch mechanism to impart power to said device from said shaft,

an o )eratin'g' connection for said clutch mechanism and an electric switch to control the passage of current through side electrodes having operating connection With said hand lever.

18.1n an electric riveting machine, a counterbalanced head having an electrode affixed thereto, and a cushioned bar slidably carried thereby, a pivoted member in striking relation with said bar, power means to operate said member, a lever having a cushioned fulcrum and connected to said head, and clutch control mechanism for said power means having operating connection with said lover, in combination with an elec- 15 trio switch to control the passage of the current through said electrode having operating connection with said lever.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERTIS C. TAYLOR. \Vitnesses:

A. E. VVONDUS, J. H. EWALT.

Images