US1816681A - Foot lever motor - Google Patents

Description

July 28, 1931.` i s, LAMER 1,816,681

FOOT LEVER MOTOR Filed OCl'.. 28, 1929 5 Sheets-Sheet l Samue-mez" INVENTOR ATTORNEY my 2s, 1931. 1 s. LAME 1,816,681

FOOT LEVER MOTOR l Filed Oct. 28, 1929 y 3 Sheets-Sheet 2 M 79 f?, illllllllllll' if %731 y I 72 I I| f C52 E I1 f'fllrlm w v|| 59/IHIIIH y I l 5f 5,/ l" 11111111111:

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Samuel amer INVENTOR ATTORNEY July 28, 1931; s, LAMER 1,816,681

FOOT LEVER MOTOR Filed 001528, ms s sheets-sheet 3 Samueemez ATTORNEY Patented July 28, 1931 UNITED STATES PATENT OFFICE SAMUEL LAMER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO JOSEPH SKRAK, OF PITTSBURGH, PENNSYLVANIA FOOT LEVER MOTOR Application led October 28, 1929. Serial No. 402,982.

This invention relates to a novel foot operated motor for employment in shops and elsewhere where it is desired to drive machinery such as drills, grind stones and in fact any ,5 machinery of comparatively small size, the invention having as its primary object to provide a motor which may be operated by the expenditure of a minimum amount of power on the part of the operator, and which lo may be readily adjusted so as to deliver high power ata low speed or low power at a high speed, so that the motor may be quickly adapted for the driving of different types of machines or mechanisms.

Another object of the invention is to provide a motor of this type in which power is generated by the simple depression of a single foot lever at suitable intervals during the period of time in which the power is needed.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specili- 25 cally pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several 3o views, and in which Figure 1 is a view in side elevation of the motor embodying the invention.

Figure 2 is a horizontal sectional view taken substantially on the line 2 2 of Figure V 1 looking in the direction indicated by the arrows.

Figure 3 1s a vertical transverse sectional view taken substantially on the line 3-,-3 of Figure 1, looking in the direction indicated Y turn is mounted upon the under side of a bench 2, upon which the mechanisms, to be actuated by power derived from the motor, may be arranged, the casing being in this manner supported above the floor of the work shop, indicated by the numeral 3. The 55 foot lever is indicated by the numeral 4 and is pivotally mounted at one end as at 5 upon a bracket 6 fixed Aupon the Hoor 3, the lever being provided at its opposite end with a foot pedal 7 whereby it may be conveniso ently depressed by a workman standing opposite the bench 2. A cable 8 is connected at one end to the lever 4 near the foot pedal 7, and is leading upwardly through the bottom of the casinor and over a pulley 9 which is 65 mounted at the end of a lever arm 10, which in turn is mounted at its other end as at 11 upon a bracket 12 mounted upon the upper side of the bottom of the casing. From the pulley 9, the cable 8 is lead downwardly and 70 about a small winding drum 13 mounted in a frame 14 upon the under side of the bottom of the casing 1, the end of the cable being connected, to the drum and the drum beingrv provided near one end with a disk 15 formed" 75 with an annular series of openings 16, and a detent stem 17 is slidably mounted in one side of the frame 14, and is engageable interchangeably in the said openings 16 so thatu the winding drum 13 may be held stationary at any point in the rotative movement thereof. In order that the winding drum may be rotated, a hand wheel 18 is fixed upon the other end of the drum shaft and, when `a suf-V icient length of the cable has been wound upon the drum 13 the detent stem 17 is pressed inwardly, against the tension of a spring 1,9 which is mounted thereon between the side of the casing 14, by a finger knob 20, which is p provided at the outer end of the stem, and the engagement of the inner end of the stem in one of the openings in the disk 15 will then serve to hold the cable against unwinding. The stem 17 is held within the opening by tension upon the cable, the spring 19 being insufficient to withdraw the stem until such tension is released. This device is provided for the purpose of varying the extent to which the lever 10 will be moved downwardly l upon pressure being exerted upon the foot )'10 y pedal 7 of the foot lever 4. The numeral 21 indicates a second lever arm which is pivotally mounted at its inner end as at 22 upon the bracket 12 and the outer end of this arm, which is indicated by the numeral 23, is beveled at its under side thus adapting it to ride downwardly over a rounded nose 24 at the upper end of a pawl 25 which is pivotally mounted as at 26 upon the said lever 10 near tlieupulley 9 it being observed by reference to Figure 1 ofitliedrawings `that when the pawl 25 is in engagement with the end 23 of the lever arm 21 and downward Amovement is imparted to the arm 10, the arm 21 will likewise be moved downwardly about its pivot. Inorder to determine the point which the ypawl 25 willrbe ydisengaged frointhe end 23 ofthe lever 21, the saidpawlis provided with an arm27which extends opposite the lever arm 10 inthe direction of the pivot 11 for said arm, the said arm. 2:7 is-provided at its rear endY with al ahead28 projecting downwardly therefrom andengageable with an abutment screw 30 adjustably mounted in .the bottom of the casing. A leaf spring 31 is mounted upon the upper side of the lever arm 1U and beans at its free end against the upper side of the larm 27 above the head 26 and it will be evident at this,point,.and particularly by reference .to Figure 5 of the drawings that when fthe lever 4is fully` depressed the head 29 will engage the upper end of the abutment screw 30 .and the armA 27 will be rocked to effect disengagement of the n ose 24 from the end of Ythe lever arm 21. The lever arm 10 is guided in its swinging movement by an upright guide 10 mounted upon the bottom ofthe casing, anda spring 10al is .connected with the said arm and tends to swing the same upwardly.

Then released, the arm 21, in its upward swinging- .movement, is limited by a stop 29 lhaving a vrubber facing to cushion the impact of the karm therewith. Y

rlhe numeral 32 indicates a shaft which is journall-.edin the casing 1 and; upon which is 'fixed a pulley 33 to which i-s connected, at a ypoint in its circumference, oneend` of a short rcable 34,*-this cable being led vdownwardly and connected atfitslowerlend at 35to the Ylever arm 21 near the end thereof.

At this vpoint it will be understood that when .the ypawl 25 is in .engagement with .the

.nose 23 and. .the lever is depressed, thevdownward .swinging movement which is imparted to the .arm :21 Vwillresult inthe rotation `of the shaft 32 toward the left in Figure 1 of the drawings .due to the unwinding of the cable A34 ,from .thepulley The numeral `36 Jindicates va large pulley which is-'likewise .lined :upon- `they shaftBQ, and ya cable 37 is connected .at onel end -to this; pulley las indi- 37 is trained over the upper side of the pulley 36 and beneath the pulley 39, rotative movement of the pulley 36 to the left upon depression of the foot lever, as before stated, will effect a rotation of the pulley 39 to the right in Figure 1, and this will effect rotation rof a pinion 42, which is. likewisefixed upon the shaft 40, and this pinion meshes with a gear 48 mounted upon a shaft 44, likewise journalled in a bearing upon the partition wall 41 belowv-the-shaft40. inasmuch as the pulley 39 and pinion 42 associated therewith, areV rotated to the right in the operation of the lever 4, the gearr43 will be rotated to the left and therefore corresponding rotary motion will be impartedto a ratchet wheel 45 in a corresponding direction and-the said natchet wheel 45 is `engaged by .a pawl 46, which ispivotally mounted upon agea-n.47 in turn loosely mounted upon the saith-shaft 40, the pawl being yieldinglgy7 heldin. engagement with the ratchet wheel 45 through the medium .of a leaf spring 48.

The numeral 49 indicates acoiled spring which is securedf at one end as: indicated by the numeral 50 to the shaft 40 and at. its other end to a cross .rod 51,` which is mounted between the parti-tion YVwall 41 and' the side wall of a casing .52, which; ismounted. beside lthe partition wall'. rllhis rotati-vefmovement vof the gear 47 will therefore effectwinding of the springabout the shaft 40-and theigearing, above describe-Chis so proportioned that single downward depression ofthe; foot lever 4 will effect complete winding up of' the spring, and it isat .this-time that the head `284 upon the arm 27 yof the ,pulley 9wi-l1lf engage the `upper end of the abutment screw 30 and result in the releaseof the-lever ,arm521 whereupon the spring 494 in unwinding, will impart reverse rotary .motionito the shaft 40.

The numeral 5.3 indicates a shaft which is iourn-alled in the casing wall 52 and .the partition wall 41 and u pon thisVV shaft .there is fixed a pinion 54 which is- .in meshwith v'the gear 47 at onerside .of said gear., A` gear 55 is also Vfined upon the shaft 53 and is lin 'mesh with a pinion 56 fmounted upon a shaft v.57, which is -journalled in the partition wall 41 and a second partition wall 58 arranged within the casing. vFixed `upon the shaft 57 isa ily wheel, which is indicated :in general by the numeral 59, and this `ily wheely eomprises a hub 60 which is 'Xed to the -said shaft 57' and a circular body 61, which is provided at its Iperiphery with .a plurality of integrally formed weights 62 whi-ehare formed with openings 63 each 4opening:being fitted with a leadfiller, as indicated by the i numeral Y Likewise the body. 6111s formed withV openings 65 `and a filling of lead 68'fills fthese openings. Openings 67 arranged in :an annular seri-es yabout 'the axis 'of 'the lyfvwheel,

provided for the circulation of air in the rotation of the wheel, thus creating a circulation of air within the casing so as to maintain the parts in suitable cooled condition. rlhe pulley 68 is fixed upon the shaft79 and a cable 69 is led about this pulley and over a pulley fixed upon a shaft 70, which is mounted pivotaliy upon the upper side of the bench 2. A shaft 7l is journalled in bearings upon the partition walls 4l and 58 and 'a pinion 72 is fixed upon this shaft and is in mesh with that side of the gear 47 opposite the side at which the pinion 54, previously described, is located. A pulley 73 is mounted upon one end of thevshaft 7l, which projects through the partition wall 58 and a cable 74 is trained about this pulley and about another pulley (not shown) upon the shaft 70, it being understood that through the medium of the gear 47, the pinion 72, the pulley 73, the cable 74, and the pulley upon the shaft 70, about which this cable is trained, motion is impar-ted to the shaft 70. A cable 75 is trained about a pulley 7 6 fixed upon the shaft and leads to a pulley upon a shaft constituting a part of any mechanism which is to be driven by the motor and which mechanism, as before stated, is to be mounted upon the bench 2. This pulley is driven at such a speed and is so proportioned that it will deliver great power at a relatively low speed.

In order that the motor may deliver less power at a higher speed, a pinion 77 is fixed upon the fly wheel shaft at one end which eX- tends through and is mounted in the partition wall 58, and this pinion meshes with a gear 78 mounted for rotation on a stub shaft 79, which is in turn mounted upon the partition wall 58, a pulley 68 being rotatable with the gear 78 and rotary motion being imparted, from this pulley to a pulley upon the shaft 70.

As previously stated, depression of the foot pedal 7 will move the arm l0 pivotally downward, downward movement of the arm 2l being effected through the dog 25. This operation will rotate the wheel 36 in a counterclockwise direction, while a clockwise rotation will be imparted to the pulley 39 and the shaft 4f). Through the medium of the gears 42 and 43, the shaft 44 will be rotated in a counterclockwise direction to wind the spring 49. As soon as the inner end 28 of the dog 25 engages the abutment screw 30, the arm 2l will be released, so that the spring 49 will then be free to unwind. rIhe gear 47 will then rotate in a clockwise direction to drive the pinion 54 and the shafts 53 and 57, while the pulley 68 will be driven at high speed. It is of courseunderstood that when drive is through the pulley 68', the belt 74 will be disconnected. W'hen it is desired to drive through the belt 74, the belt 69 will be `disconnected, increased power and slower speed resulting by the use of the belt 74.

Vhat I claim is p l. In a foot operated motor, a shaft from which the power of the motor is to be taken, a shaft geared with the first mentioned shaft, a fly wheel upon the last mentioned shaft, a shaft geared with the fly wheel shaft, a coiled spring connected with the last mentioned shaft and adapted to be wound by the rotation of said shaft in one direction and to constitute al means for driving when the spring is permitted to unwind, and a foot lever operable, in a single depression thereof, to rotate the fly wheel shaft to impart impetus thereto sufficient to fully wind the said spring.

2. In a foot operated motor, a shaft from which the power of the motor is to be taken, a shaft geared with the first mentioned shaft, a fly wheel upon the last mentioned shaft, a shaft geared with the fly wheel shaft, a coiled spring connected with the last mentioned shaft and adapted to be wound by the rotation of each shaft in one direction and to constitute a mea-ns for driving the first mentioned shaft when the spring is permitted to unwind, a foot lever operably, in-a single depression thereof, to rotate the fiy wheel shaft to impart impetus thereto sufficient to fully wind the said spring, and means for automatically returning the foot lever to its initial position after depression.

3. In a foot operated motor, a shaft from which the power of the motor is to be taken, a shaft geared with the first mentioned shaft, a fly wheel upon the last mentioned shaft, a shaft geared with the fiy wheel shaft, a coiled spring connected with the last mentioned shaft and adapted to be wound by the rotating of said shaft in one direction and to constitute a means for driving the first mentioned shaft when the spring is permitted to unwind, and means for imparting impetus to the fiy wheel to fully wind the spring, the said means comprising a lever arm', a pulley upon the second mentioned shaft, a cable connected to the pulley and wound thereon, a pulley, of larger diameter thanV the first mentioned pulley, to which the cable is also connected, a pulley rotatable with the last mentioned pulley and connected to the lever arm, a second lever arm mounted below the first mentioned lever arm, a latch upon the last mentioned lever arm for engagement with the first mentioned lever arm to connect the two for movement in unison in a direction to unwind the cables,

a Aly Wheel upon the last mentioned shaft, a, shaft geared with the fly Wheel shaft, a coiled spring connected With the last mentioned shaft `and adapted tolbe Wound by the rotation of said shaft in one direction and tovcon- Stitute a mean-s for driving the lirst mentioned shaft When the spring is permitted to unwind, and a oot lever operable, in asingle depression thereof, to rotate the fly Wheel 1G shaft to impart impetus thereto suicient to vfully Wind the said spring, the said fly Wheel comprising a hub, a Web thereon and weighty enlargements at intervals upon the periphu ery of the Web.

In testimony whereof I zLfHX my signature.

' SAMUEL LAMERA

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