US1130011A - Grinding-machine. - Google Patents

Description

H. NORDVALL.

GRINDING MACHINE.

APPLIUATION FILED MAR. 24, 1913.

Patented Mar. 2, 1915.

IHE NORRIS PETERS C0. PHOTC-LATHQ, WASHINGTON D. C

' ma ma amen. lcammb, rumors.

i Gn ivnIne-i/mcnmn v T aZlZ. whom it may concern Be it known that :I, :I-IJALMAR NORDVALL, a subject of the King ofSWeden', and aresident of Chicago; Cook county; Illinois, have I which needs tobe: held in avise', and provided with a tilting table which'may be temporarily mounted on-the viseyasqin the case ofzthe grindingwhe'el', to holdother kinds of work in proper relation ztoathe grindingwheel. -Foot-fpower air-pressure is utilized as the driving'force and the exhaust air is directed to clear the Work. of dust. 2'? y In the accompanying drawing-Figure 1 is a side elevation, partly in section, of a machine embodying my invention. Fig. 2 is a plan View of the machine. Fig. 3 is a perspective view on a small scale of the machine equipped with driving means. Fig. 4 is a section taken substantially on line 4- 1 of Fig. 1. Fig. 5 is a sectional elevation of the motor, taken substantially on line 55 of Fig. 2. Fig. 6 is a section taken substantially on lineG-G of Fig. 2.

In the several views 2 represents a conventional vise secured by a clamp 3 to a bench 4 and provided with an anvil portion 5 and jaws 6 and 7 the latter being movable on a pivot 8. On the jaw 7 is a lug 9 which has a threaded horizontal bore that is engaged by a screw 10 turned by means of a hand-wheel 11. The ends of the screw are journaled in bearings 12 at the ends of a work-table 13, near its upper edge. Near its lower edge the table 13 is supported by a curved leg 14 which is slidably mounted on a rod 15 having its ends securedto brackets 16 near the ends and lower edge of the table, said leg being mounted at one end for sliding movement in a slot 17 in the body of the vise. The leg is normally held against sliding movement in this slot by a bolt 18 with a Winged head 19, this bolt engaging a threaded bore in the vise and its inner end bearing against the leg S pecification of Letters Patent. Application filed Ma1c1124, 191s. Seria1l\To. 756,296.

lPatented Man-2, 1915..

14. Immediately back of the jaw 6 the body, of the'vise has thereon a T-shapedlug 'or support 20'which engages a correspondingly formed slot 21 in thelower end f a standard 22awhich is hollow'and is telescoped ;by a vertically adjustable support 23: on theupper end of which is fulcrumed on abolt 2 1 a lever 95. Thebolt 24= engages a slot 26 in. the lever wherebythe 1l.atltter 1S longitudinally adjustable on the of .The handle-end 27 of the lever is heldnormally raised'by .as spring 28 .having its upper end-secured .at129 tothe rear end of the lever and its lower end secured to a lug 30 on the standard22. The'latter is removably secured to the lug 20.by means of a set screw .fora rotary shaft having keyed to one end thereof an air-motor 36. On the opposite end of this shaft is a ball-joint ball 37 to which is fitted a hub for a grinding wheel consisting of a pair of clamp-members 38 and 39 secured together by screws 40 and 41 passing through bores in the member 38 and having threaded engagement with the member 39, as shown in Fig. 6. In the periphery,

of the hub is a groove 42 in which is secured an annular grinding wheel 43. The hub and its wheel 43 are angularly adjustable relative to the shaft 35 on the ball-joint for which purpose the latter has therein a slot 424: loosely engaged by the inner end of a screw 45 that has threaded engagement with the member 38 of the hub. The angular adjustment is eii'ected by a fork having forkmembers 16 and 47 that engage opposite sides of the hub as in Fig. 4:. This fork is provided with a shank 18 that is engaged with a horizontal slot 49 in a standard 50 that rises from the bearing 34. The shank 4:8 is movable longitudinally in the slot 49 whereby the wheel 43 is tilted to accommo date it to various angles of surface that the grinding wheel is caused to operate upon. The shank is held in any position into which it has been adjusted by a set screw 51 having its clamps.

' j aws, together with the. adjustability of the threaded engagement with a bore in the standard and bearing against the shank. The inlet to the air-motor which is on the same shaft asthe grinding wheel, is at 53 and the outlet is at 52. The inlet is connectedby means ofa-flexible tube 5% with an air-pressure tank 55 (Fig. 3) into which air is pumped by a compressor or engine 56 which may bedriven by a treadle 57 pivoted at 58 to a stationary part of the engine and pivoted at-59 to a crank connection with a wheel 60, the details of which are innnaterial, as any other'mechanism for the purpose adapted to accomplish it willserve just a-s'well for the purpose of the present invention, The outlet, or exhaust, of the air-engine 36 is provided with a nozzle 61 which is arranged to direct the outflowing exhaust air against the work and the grinding wheel.

"62 represents a saw on the tilting table arranged to have its teeth ground or sharp- V ened by the tapered type of grinding wheel shown. 7 I

63 and 64 are clamps for holding the work when this is of such a nature that it requires the supportof the'table 13 with or without The opening between the vise grindingwheel and its engine, is adapted to take the place of the table as work-holding means where a vise-hold is needed. At the exhaust or air-outlet for the engine 36 is arranged a valve 65: controlledxby a finger le- Copies 6: this patent may be obtained for ver 66 connected with the valve 65 by a rod 67. By means of this lever and valve the operator may stop and start the engine by stopping and starting the flow therethrough of the air. s

It will be noticed that the grinding machine attachments are quickly removable from the vise when it is desired to use the latter exclusively as a vise and not as a mere support and work-holder for the grinder.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination with an angularly and longitudinally adjustable hand-lever, of a grinding wheel and the like rotary element operative upon a piece of work, means for rotating same, and means on said lever for controlling the motive power.

2. The combination with a hand-lever, of means for adjusting said lever vertically and horizontally with respect to its axis of angular movement, a source of power, a driving motor on said lever, and means on said lever for controlling said motor.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

HJALMAR NORDVALL.

Witnesses EDWIN B. NnLsoN, J. W. BECKSTROM.

five cents each, by addressing the Commissioner of Patents, Washington, D. C.

Images