US1409000A

US1409000A - Machine-controlling treadle

Info

Publication number: US1409000A
Application number: US409973A
Authority: US
Inventors: Hubbell Harvey
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-13
Filing date: 1920-09-13
Publication date: 1922-03-07
Anticipated expiration: 1939-03-07

Description

H.- .HUBBELL. MACHINE CONTROLLING TREADLE.

APPLICATION FILED SEPT-11%| I920.

1,4,09,00.0.- Patented Mar. 7, 1922.

3 SHEETSSI'IEET I INVENTOR ATTORNEYS II. HUBBELL.

IIIA-CHINE CONTROLLING TREADLE. I APPLICATION FILED SEPT. 13, I920. 1,409,000, I Patented Mar. 7, 1922.

3 SHEETS-SHEET 2.

INVENTOR MM Wm ATTORNEYS H. HUBBELL.

MACHINE CONTROLLING TREADLE.

APPLICATION man SEPT. 13, 1920.

3 SHEETSSH EET 3- g g g INVENZOR I BY ATTORNEY Patented Mar. 7, 1922.

UNITED STATES PATENT QFFICE.

HARVEY HUBBELL, OF BRIDGEPOBT, CONNECTICUT.

MACHINE-CONTROLLING TREAIDLE.

Application filed September To all whom it may concern: Be it known that I, 'Hiinvnv HUnBnLL, citizen of the United States, residing at Bridgeport, county of Fa rlield, State of Connecticut, have invented an Improvement in Machine-Controlling 'lreadles, oi which the following is a specification.

This vinvention relates to a machine controlling treadle whichisparticularly useful in connection with automatic tapping machines of the general type of that disclosed in Letters Patent No. 576,404, granted to me on February 2, 1897. The machine illustrated and described in said patent is provided with a tap, a work earrier'adapted to move work into the tap, and with means whereby the tap may be rotated in opposite directions so that it may enter the work and be withdrawn therefrom, said rotating means including a pair of loose pulleys which are continuously rotatable on the tap carrying shaft, cone pulleys which are keyed to said shaft and are adapted'to alternately engage hollow-cones carried by the loose pulleys, and a bell crank leveradapted to cause the cone pulleys to move longitudinally of the shaft and into and out of engagement with the hollowcones, said bell crank lever being manipulated by means of a treadle.

It is the object of the present invention to provide a controlling treadle which shall be capable of causing the direction oi rotation of a tap or drill in machines of the present character to be reversed, and which is so constructed and arranged that the rotating power for the tap or drill shaft is necessarily and automatically shut oil when the operator leaves the machine. To this end, I preferably provide electrical operating means and means associated therewith for causing said tap or drill to be alternately rotated in opposite directions, said electrical operating means and associated means being the equiv alent of the means for the same purpose disclosed in the patent above identified. end a. doubleacting tr adle for manipulating said associated means as in said patent and for controlling said electrical operating means by causing a circuit to be open when said treadle is in normal position and to be closed when said machine is in use. The advantage of having the. otating power for the tap or drill shalt automatically shut oil when the operator leaves the machine will be apparent.

lVith the above other objects in view,

Specification of Letters Patent.

Patented Mar. '7, 1922.

13, 1920. Serial No. 409,973.

the invention will now be fully described and hereinafter specifically claimed.

In the accompanying drawing lormhw a part of this specification, a

F .l is a. perspective view of a complete machine disclosing the controlling treadle of the invention;

Fig. 2 a side elevation as viewed from the left in Fig. 1, showing the pedal and the pedal carrier in different positions;

Fig. 3 a partial side elevation correspond ing with Fig. 2, but showing the pedal and the pedal carrier in dillerent positions;

Fig. 4.- a side elevation as viewed from the right in Fig. showing the pedal and pedal carrier as in i 1g. 2;

Fig. 5 a partial side elevation corresponding with Fig. 3;

6 a top plan view;

Fig. 7 a sectional view on line 77 in Fig. 2, loosing in the direction of the arrows; L

Fig. 8 is a partial side elevational view oi the lower part oi the pedestal and connected parts, showing the treadle and the connected link.

Fig. 9 is a front elevational view of the machine showing belt-drive and control theretor.

l denotes a pedestal base. and 11 a table supported thereby. spindle shaft 12. journaled in bearings 13 supported from the table, is provided with a chuck l4 and with a tap or drill 15. The spindle shaft is rotatable and longitudinally slidable in its bearings and rigidly carries beveled wheels 16 which are located hetween said bearings and are spaced from each other a suitable distance. The beveled wheels serve as driving pulleys for the spindle shaft and are provided with friction facings for this purpose. An electric motor 17 preferably resting on the table is provided with a motor shaft 18. A driving shaft 19, flexibly connected to the motor shaft as indicated at 20. is provided with a beveled wheel 2i. similar to beveled wheels 16. which is adapted to alternately engage said last mentioned beveled wheels when the spindle shaft is reciprocatcd as presently to he described. md to thus impart rotation in opposite directions to the spindle shattas will be understood. denotes a bearing bracket For the driving shaft. As shown in Fig. 7. 23 denotes lead wires. 2 a switch base carrying a lead wire plug fuses 26. knife blade I blade contacts and are movableinto and.

contacts 27, and switch blades 28. The switch blades are pivoted to certain of the out of others,and wires (not shown) lead from the blade contacts to the motor. An insulated tie bar 29 secured to the switch blades carries an angle strip 30 which is pivoted, as indicated at 31, to a pedal linkv consisting of a flat bar 32 and a round rod 33 which is manipulable to open and close the circuit by means of the pedal carrier of the treadle as will be made clear. The pedal link is made in two parts as shown so that the upward movement of the trea'dle will be yieldingly imparted to the knife blades. The fiat bar is provided with ears,

'41 on the table and passing through an opening 42 in the table carries a yoke rod 43 which has a bearing surface loosely fitting the spindle shaft. A pair of yoke collars 44 fixed on. the spindle shaft are located at opposite sidesof the bearing surface of the yoke rod. A slide rod 45 located in a work rest 46 and adapted to move from and toward the tap or drill, is provided with a work holder 47 and with an adjustable collar 48 carrying a short dependingrod 49 adapted to engage a tripping pin 50 carried by a trip lever 51 pivoted to the table as indicated at 52. The trip lever is provided with an arcuate slot 53 in which the tripping pin is adjustable, said pin being provided with a shoulder and-a wing nut 54 for this purpose. A link 55, pivoted to the trip leveras indicated at '56, is pivoted to the fiat bar, denoted by 57 of a second 1 pedallink. A catch 58 carried by flat bar 57 is adapted to engage a catch plate 81 car ried by the bell crank lever. A relatively strong spring- 59, secured to the bell crank lever and to the table, holds the depending arm of the bellcrank lever in its uppermost posi tion, and a relatively weak spring 60 secured to fiat bar 57 and to the bell crank lever normally holds the catch in engagement with the catch plate. The depending arm of the bell crank lever is adapted to be 'moved downwardly by means of the second pedal 'link consisting of flat bar 57 and a rod 61 and manipulated by means of. the treadle of the invention as will also be made clear. The pedal link is made in two parts as before noted so that the downward movement of the treadle will be yieldingly imparted to the depending arm of the bell crank lever, fiat bar 57 being provided with

ears

62 and 63 through which rod 61 is adapted to slide, the rod carrying a spring 64 and

collars

65 and 66. The spring is located between collar 65 and car 63, and

collars

65 and 66 are below

cars

62 and 63, respectively. 7

' The treadle of'the invention consists of a pedal carrier 84 and a pedal 83. The pedal carrier has a long arm 67, a short arm 68 and a tie rod 69. which connects the front ends of said arms with each other. A rod 7 O passing through the pedestal base forms a pivot for both arms, the short arm being pivoted on said rod at its rear end and the long arm being pivoted intermediate its ends, as will be obvious. 1A weight-71 adjustable longitudinally on the rear portion of the long arm is for the purpose of normally keeping said end in its lowermost position. The pedal is provided with ears 72 which are pivoted to opposite ends of the tie rod, with an ear 73 adapted to hold a spring 74, the opposite end of which is attached to the pedestal base, as indicated at 75, to normally hold the pedal in elevated position, and with an car 76 carrying a stud 77. The lower end vided with a similar eye 78, adapted to piv otally receive a stud 79 extending from the long arm of the pedal carrier and located between the pivot point for saidlong arm and the adjustable weight. Lugs 80'on the short and'long arms of the pedal carrier limit the downward movement of the pedal.

It will be obvious that when the pedal carrier is in the position disclosed in Figs. 2 and 4, the circuit will be broken and the rotating power for the driving shaft will be shut off. 'When now the operator pushes downwardly on the front portion of the pedal carrier the knife blades will move into the blade contacts and the motor will cause the driving shaft and'its beveled wheel to rotate. Spring 59 will normally hold the depending arm of the bell crank lever in its uppermost position so that'th'e' yoke rod will cause one of beveled wheels 16 (the one to the right in Figs. 4 and 6). to engage the beveledflwheel of the driving shaft as will be understood 'lVhen the operator pushes downwardly on the rear portion of the pedal the catch, by reason-of its engagement with the catch plate, will cause the'fd'epending arm of the bellcrank lever. to be lowered so that the other bev'eledwheel 16 (the oneto the left in Figs. 4 and 6) engages the bev-' eled wheel of the driving shaft. It is when trip lever and the collar carrying the short depending rod 49 is so adjusted that at the end of the tapping or drilling operation the rod -19 causes the trip lever, by means of the link, to move the catch 58, from the catch plate 81, as will be understood; spring 59 being allowed to act to draw the depending arm of the bell crank lever to its uppermost position, so that the beveled wheel to the right in Figs. at and 6 again engages the beveled wheelof the driving shaft. This is the position of the operating parts when the tap or drill is being withdrawn from the work. \Vhen now the operator releases the pedal, spring 74- will cause said pedal to be elevated and spring 60 will 'draw the catch over so that it engages the catch plate on the bell crank lever, and throws the trip lever 51 back to normal position. Another piece of work can now be tapped or drilled as before. It will be evident that as soon as the operator releases the front portion of the pedal carrier, the weight will fall by gravity and cause the knife blades to be removed from the blade contacts to break the circuit.

In order to adapt this invention to factories in which motor drives Fare not installed there have been. substituted for the motor 17, a belt 87, and fast and loose pulleys S8 and 89 on the spindle shaft 12.

Belt guide pins 90 upon each side of the belt are held upon a bell crank shifting lever 91 pivoted at 92 upon a bracket 93 forming a part of the bearing 13 for the spindle shaft 12. By means of the spring 94 the belt shifting lever is retained in the position shown, with the belt on the loose pulley 89. A link 95 pivotally connected to the lower end of the belt shifting lever extends downwardly to a pivot pin 96 passing through the flanged over portion 97 of the inner end of the long arm 67 of the pedal carrier.

It will be plain that the depression of the pedal carrier initiates the driving action by moving the belt onto the fast pulley and that by the manipulation of the pedal the direction of drive of the spindle shaft will be controlled as described, upon release of the pedal carrier the spring 94: will shift the belt onto the loose pulley and stop the drive.

hat I claim is:

1. A machine controlling mechanism comprising main and auxiliary power controlling means, a treadle comprising a pedal and a pedal carrier pivoted to each other, with one of them fulcrumed on a suitable support, whereby they may be swung on the support as a unit or one may be operated independently of the other, and connecting means whereby operation of said members as a unit will actuate said main power controlling means and actuation of said independently operable member will actuate said auxiliary power controlling means.

2. In a device of the class described, a rotatable shaft, primary and secondary controlling means for said shaft so arranged that the primary controlling means is independent of the secondary but the secondary is dependent on the primary, a pivotally mounted pedal carrier connected to said primary controlling means, a pedal pivoted to said pedal carrier and connected with said secondary controlling means, and means normally tending to hold said pedal and carrier in ineffective position.

A machine controlling mechanism comprising a main [power controlling means and an auxiliary power controlling means, manually operable means comprising two sections one of which is fulcrumed on a suitable support and the other fulcrumed on the first section, whereby the two sections may be operated as a unit or the second section may be independently operated on the first section, and means whereby operation of said sections as a unit will actuate said main power controlling means and operation of the second section will actuate said auxiliary power controlling means.

4. A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between said arms, a pedal pivoted to said tie rod, and means for pivotally supporting said pedal carrier.

A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between said arms, a pedal pivoted to said tie rod, and means for pivotally supporting said pedal carrier, said pivoting means consisting of a rod passing through a pedestal base and engaging said long arm and short arm.

6. A machine cont-rolling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between said arms, means for pivotally supporting said pedal carrier, said means comprising a rod passing through said short arm at its rear end and through said long arm intermediate its ends. a. second tie rod connecting said arms at their front ends and a pedal pivoted to said second tie rod.

7. A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between said arms, a pedal pivoted to said tie rod, a rod to which said pedal carrier is pivoted, said rod entering said long arm intermediate its ends and said short arm at its rear end, means for normally holding said pedal carrier in elevated position, and additional means for normally holding said pedal away from said pedal carrier.

8. A machine controlling treadle comprising a pedal carrier and a pedal, said pedal carrier consisting of a long arm carrying a weight near its rear end, a short arm, and a tie rod connecting said arms at their front ends, and'said pedal being pivotally secured to said tie rod, in combination with means for pivotally supporting said pedal carrier, said supporting means comprising a rod passing through a pedestal base and engaging said long arm intermediate its ends and said short arm at its rear end.

9. A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between the front ends of said arms, a pedal pivoted to said tie rod, a rod pivotally supporting said pedal carrier, said'rod entering said long arm intermediate its ends and entering said short arm at its rear end, a weight arranged on the rear end of the long arm for normally holding the pedal carrier in elevated position,

I and means for normally holding the pedal in elevated position and away fromthe pedal carrier.

;1'0. A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between the front ends of said arms, a pedal pivoted to said tie rod, a rod pivotally supporting said pedal carrier, said rod entering said long arm intermediate its ends and entering said short arm at its rear end, a weight arranged on the rear end of the long arm for normally holding the pedal carrier in elevated position, and a spring attached to the rear portion of the pedaland to a pedestal base for normally holding the pedal in elevated position. 7

11. A machine controlling treadle comprising a pedal carrier consistingof a long arm; ashort arm, and a tie rod between the front ends of said arms, a pedal pivoted to said tie rod, means pivotally supporting said pedal, said supporting means entering said long arm intermediate its ends and entering said short arm at its rear end, means arranged on the rear end of the long arm for normally holding the pedal carrler 1n elevated position, means between the rear portion of the pedal and a pedestal base for normally holding the pedal in elevated position,

and lugs carried by saidlong and short arms for limiting the downward movement of the pedal.

.12. A machine controlling treadle com prising a pedal carrier consisting of a long arm, a short arm, and a tie rod between the front ends of said arms, a pedal pivoted to said tie rod, means pivotally supportingsaid pedal carrier, said supporting means. 'enter ing said long arm intermediate its ends and entering said short arm at its rear end, means arranged on the rear end of the'long arm for normally holding the pedal carrier in elevated position, means for normallyholding the pedal in elevated position and away fromthe pedal carrier, and studs car.- ried by said long arm and pedal respectively,-saidstud carried by said long arm bescribed.

13. A machine controlling treadle comprising a pedal carrier consisting of a long arm, a short arm, and a tie rod between the front ends of said arms, a pedal pivotedto said tie rod and provided at its rear end with means to normally hold it in elevated position, and means for normally holding the front portion of the pedal carrier. in elevated position, in combination with .pedal links and means for pivot-ally connecting said pedal links to said long arm and-pedal, respectively, said pivotal connecting means for said long arm and pedal being adjacent the rear ends of the same as and for the purposes described. A i

14. A machine controlling. treadle comprising a pedal carrier consisting of a long arm, a short arm, a tie rod between the front ends of said arms, andmeans for pivotally supporting said pedal carrier, said pivotal supporting means entering said long arm intermediate its ends and entering said short arm at. its rear end, a, pedal pivoted to said.

tie rod andprovided at its rear end with means to normally hold it in elevated position, and a weight secured'to the rear'portion of said long arm for normally holding the pedal-carrier in elevated position, in com bination with pedal links and means for pivotally securing said pedal links to said long arm and'pedal, respectively, said pivotal securing means for said long arm being arranged between said pivotal supporting means and said weight, and said pivotal securing means for said pedal-being attached 7 to the rear portion of said pedal, as andufor' the purposes described. 7 15A machinecontrolling treadle comprising a pedal carrier and. apedal, said pedal carrier consisting ofa longarlma short arm, a tie rod between the front ends of said arms, andmeans for pivotally supporting said pedal carrier, said'pivotal supporting means engagingthe rear end of the short arm and engaging the long arm intermediate its ends, and said pedal pivoted to said tie rod, .in combination with a weight carried near the rear end of said long arm for normally holding said pedal carrier in elevated position, means consisting of a spring attached to the rear portion of said pedal and to a pedestal base fo'r'normally holding said pedal in elevated position, pedal links actuated by said pedal carrier and pedal, respectively, and means for pivotally securing said pedal links to said pedal and pedal carrier, said pivotal securing means between one of said pedal links and the pedal carrier engaging said long arm at a point between its pivotal support and its weight, and said pivotal securing means for the other of said pedal links being arranged on the rear portion of the pedal.

16. A machine controlling treadle comprising a pivotally mounted pedal carrier and a pedal pivoted to the pedal carrier, in combination with pedal links and means for pivotally securing said pedal links, respectively, to the pedal and pedal carrier, said pivotal securing means being arranged aqjacent the rear portions of the pedal and pedal carrier, and said pedal links being capable of actuation by pedal and carrier, one of said pedal links attached to means for opening and closing a circuit and the other of said pedal links attached to mechanism capable of causing the direction of rotation of a shaft to be reversed.

17. A machine controlling treadle comprising a pedal carrier and a pedal, in combination with pedal links and means for pivotally securing said pedal links, respectively, to said pedal and pedal carrier. said pedal carrier consisting of a long arm, a short arm, a tie rod between the front ends of said arms, and means for pivotally supporting said pedal carrier, said pivotal supporting means engaging said long arm intermediate its ends, and said pedal provided with ears adapted to be pivoted on said tie rod, in combination with a weight carried by the rear end of said long arm' for normally holding the front portion of said pedal carrier in elevated position, means for normally holding said pedal in elevated position and pedal links pivotally secured, respectively, to said long arm at a point between said weight and pivotal supporting means and to said pedal at its rear portion, one of said pedal links having its opposite end attached to means for opening and closing a circuit and the other of said pedal links having its opposite end provided with a catch adapted to be engaged by a bell crank lever and pivoted to means whereby said catch can be disengaged from said lever.

18. A machine controlling mechanism comprising main and auxiliary power controlling means, a treadle comprising a pivotally mounted pedal carrier and a pedal pivoted to said carrier, and means connecting the pedal carrier and pedal with the main and auxiliary power controlling means, respectively, the pivots for the pedal and pedal carrier being so arranged that depression of the pivotal connection between the two members will close the main power controlling means and operation of the pedal about its pivot will control the auxiliary power controlling means.

19. A machine controlling mechanism comprising main and auxiliary power controlling means, a treadle comprising a pedal carrier pivotally mounted rearwardly of the forward edge thereof and a pedal pivoted to vthe carrier forwardly of the first mentioned pivot, and means connecting the pedal carrier and the pedal with the main and auxiliary power controlling means respectively, said means being so arranged that depression of the forward edge of the treadle carrier will close said main power controlling means and operation of the pedal about its pivot will control the auxiliary power controlling means.

In testimony whereof I afiix my signature.

HARVEY HUBBELL.