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Publication numberUS876428 A
Publication typeGrant
Publication dateJan 14, 1908
Filing dateMar 16, 1907
Priority dateMar 16, 1907
Publication numberUS 876428 A, US 876428A, US-A-876428, US876428 A, US876428A
InventorsJohn G Blessing
Original AssigneeAmerican Cutlery Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fluid-pressure-operated grinding-machine.
US 876428 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 876,428. PATENTED JAN. 14, 1908.

. J. G. BLESSING.

FLUT PRESSURE OPERATED GRINDING MACHINE.

APPLICATION FILED MAR. 16, 1907.

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No. 876,428. PAT

. J. G. BLESSING. ENTED 1 1908- FLUID PRESSURE OPERATED GRINDING MACHINE.

APPLICATION FILED MAR.16, 1907.

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FLUID PRESSURE OPERATED GRINDING MACHINE. PPPPPPPPPPPPPPPPP AR.16,1907.

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PATENTED JAN. 14, 1908.

No. 876,428. PATENTED-JAN. 14, 1908. J. G. BLESSING.

FLUID PRESSURE OPERATED GRINDING MACHINE.

APPLICATION FILED MAR. 16, 1907.

4 SHEETSSHEET 4.

I I v .Z7EW6722%715 Lfogrz UNITED STATES PATENT OFFICE.

JOHN G. BLESSING, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO AMERICAN CUTLERY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FLUID-BRESSURE-OPERATED GRINDING-MACHINE.

Specification of Letters Patent.

Patented Jan. 14, 1908.

"A lican filed March 16. 1907. Serial No. 362.656.

To all whom it may-concern:

Be it known that 1, JOHN G. BLESSING, a citizen of the United States, residing at New Britain, inthe county of Hartford and State of Connecticut, have invented a new and useful Improvement in Fluid-Pressure- O erated Grinding-Machines, of which the fo lowing is a specification.

My invention relates to improvements in fluid-pressure-operated grinding machines, and more particularly to the class in which the grinding is performed in a single reciprocation of the work-carrier.

Mypresent invention is in the nature of an improvement u on the construction shown, described an( claimed in an application filed by me April 17, 1906, and bearing v Serial No. 312,112.

In its general construction and operation the present machine is very similar to that shown in my former application referred to; and my present object 18 to provide certain improvements in the construction of the fluid-pressure motor-device which reciprocates the work-carrier, to the end of adapting the machine more perfectly to its purpose. I

Referring to the accompanying drawings,

"which illustrate the preferred embodiment of my invention, Fi ure 1 is a broken top plan view of a knifelade grinding machine constructed with my improved motor and carrier sw1n mg mechanism; Flg. 2, an

,enlarged bro en fragmentary view in side elevation of the fluidressure motor; Fig. 3, a broken longitudina section of the same; Fig. 4, an end view of the motor; Figs. 5 and 6, sections taken respectively on lines 5 and 6 in Fig. 3, and viewed in the direction of the arrows; Fig. 7, a broken, partly sectional, view showing in side elevation, mechanism for shifting the motor-valve to reverse themovement of the work-carrier,

as well as means for movinglthe reciprocating V work-carrier laterally wit relation to'the grinding-wheel; Figs. 8 and 9, views the same as Fig. 7, but showing the moving parts in diiferent positions; and Fig. 10, an enlarged and broken fragmentary viewshowing the connection between the motor-starting lever and the motor-reversing valve.

The main frame of the machine is formed at its upper side with a water receptacle or. basin 11 in which the usual hollowcylindrical grinding-wheel 12 rotates. The grinding-wheel has an inwardly-tapering annular grinding surface 13 and rotates constantly. 14 is a horizontal base-plate adjustably pivoted at 15 to the main frame 11 to swing on its pivot to a limited extent toward and away from the grinding-wheel. Secured upon the plate 14 are perforated lugs 16, 17, forming guides for a longitudinally movable A rod. 18. Parallel with the rod 18 is a stationary guide rod 19 mounted at opposite ends in lugs 20 and 21 rising from the plate 14.

22 is a work-holder carrier extending parallel with the rods 18, 19, having a flanged end portion 23 receiving and fastened to the rod 18 and terminating at its opposite end in a cross-head 24 having openings through which the rods 18, 19 pass. The cross-head slides freely upon the guide-rod 19. Secured upon the plate 14, in the positions shown, are heads 25 and 26 for a cylinder 27; and extending through the heads, above the cylinder, is a tube or valve-chamber 28 closed at one end and provided at its opposite end with a stuffing-box 29. Extending through the stufling-box and working in the valvechamber 28 is a valve-rod 30 provided with pistons 31 and 32 in the relative positions shown. Extending into the tube 28, be-

tween the pistons 31, 32, is a fluid-pressure supplyassage 33 connected in practice by a rubber liose, or the like, with a fluid-pressure supplier, not shown. In the head 25 is a port 34 affording communication between the interior of the tube 28 and interior of the .cylinder 27 at one end. Adjacent to the port 34 is a port 35 cored in the head 25 and communicating at one end with the interior of the tiibe 28 and at its opposite end wlth a pipe 36 extending, parallel with the lower side of the cylinder, through the head 26, beyond which it is provided with a cook or faucet 37 provided with a rotary plug-valve 38. In the head 26 is a cored passage or port 39, communicating at one end with the interior of the tube 28 and at its opposite end with the cylinder 27, and a port or passage 40 extending from the interior of the tube 28 to a pipe 41 provided with a cook or faucet 42 having a rotary plug-valve 43.

44 is an operating lever or handle pivoted at 45 upon the stationary lug 16 and pivotally connected between its ends, as shown in Fig. 16, to a link 46 extending from a head. 47

and head 47 is a spring 48 which tends nor mally to shift the stem and its pistons 31 and 32 in the direction to the right in Figs. 1, 2 and 3. Working in the cylinder 27 is a piston 49 on a stem 50 passing through a stuffing-box 51 in-the head 26 and secured at its outer end to the cross-head 24. I

The pistons 31.and 32 are in effect slide valves, which, in the sliding of the stem 30, open and close the end ports inthe tube or valve-chamber 28. When in the position shown in Fig. 3, the valves 31 and 32 open the port 34 to the tube, close the port 35, and open the passage from the cylinder through t eports 39 and 40 to the faucet 42. When in this position, motive fluid asses from the port 33 through the tube anti port 34 to the cylinder to drive the iston 49 in the direction of the head 26, t e fluid in advance of the piston escaping through the faucet 42. Movement'of the stem to the right, until the valve 32 covers, the port 40, o ens the passage 39 to admit the motive uid into that end of the cylinderand o ens the passage through the ports 34, 35 or the escape of fluid from the cylinder therethrough and through the pipe 36 to the faucet 37, whereby the piston 49 will be moved to the left.

.32 covers theport 40 and the 'tacts with the stop 55.

The piston 49, through its stem 50, moves the cross-head 24 and work-holder carrier 22 longitudinally with the guide-rod 18, while sliding upon the guide-rod 19. he carrier 22 carries an adjustable workholder bar 52 of the construction shown and described in myaforesaid pending ap lication. It will suflice to say that the ar is adapted to receive and hold a knife-blade 53 placed against its face.

The handle 44, in "its movement slides upon a bar 54, the bar being mounted upon the lug 20. The tendency of the spring 48 is to move the stem 30 until the piston or valve andle 44 con- This is the normal position of the parts, and the piston 49 comes to rest in the position shown in Fig. 3. The

operation of the reciprocating work-carrier is started by moving the handle 44 to the stop 56, and means are provided for ermitting the spring 48 to reverse the va ves 31 and 32 and the movement of. the piston 49 when the latter reaches the limit of its movement in the direction of the head 26. These means will be next described;

Beneath the guide-bar 19 is a rod 57 which slides longitudinally in guide openings in the lugs 20 and 21. The rod carries an ad'ustable head or stop 58 at one end beyon the lug 20 and adjustable stops or collars 59 and 60 between the lugs in the path ofthe crosshead 24. 61 is a bent rod or catch-device pivoted u on the 11 per end of the lug 20and aving a orizonta ly-extending arm formed engaging the lever 44, and a downwardly amaze the direction to the right in Fig. 1. As the cross-head nears the limit of its movement in that direction, it engages the stop 60 and slides the rod 57 first to the position shown in Fig. 8, to cause the stop 58 to contact with the arm 63, and then to the position shown in Fig. 9, to swing the catch and lift the sh0uldered ortion 62 to release the handle 44. This re ease of the handle permits the spring 48 to reverse valves 31, 32 and the movementof the piston 49, which latter is then forced to the left, to the position shown in Fig. 3, where it, stops. In the movement of the carrier. to the right, the knife-blade 53 is held out of contact with the grinding-wheel 12 and is moved into contact with the latter during the final movement of the parts in that direction, whereby the grinding isxperformed in the outward movement of the parts which is in a direction to the left in. Fi .1.

- is before stated, the plate 14 is pivoted at 15. Resting on the upper surface of the plate 14 and pivoted at one end upon a pin 64 carried by the plate 14, is a lever 65 rovided in its swinging end-porti on with an e ongated segmental slot 66 engaging a pin 67 fastened to and rising; through 14, from a bracket 68 adjustably secured to the side-of the base 11, as by a screw-bolt 69, to adapt it to be shifted with its pin 67 transversely of the bed 14: The lever is pivotally connected at one end to a projection 70 on the adjacent end of the rod 57. In the movement of the said rod 57 to the left in the figures, for the movement of the carrier as described, it

forces the lever 65 to the position shown in an opening in the bed Fig. 1 with the effect of swinging the plate 14 on its pivot to move the knife-blade 53 out of contact with the grinding-wheel as indicated.- As the carrier nears the limit of its movement to the right, it forces the rod 57, by

'105 purpose of reversing the a contact therewith of the cross-head 24, to

the position shown in Fig. 9 and drawsthe lever 65, whereby the engagement of the slot 66 with the. in 67 swings the plate 14 to press the knifelade into contact with the grinding face of the grinding-wheel. Thus, when the knife-blade is inserted in the carrier it is moved inward nearly tofthe limit in that direction out-0f contact with the grinding-wheel, then pressed into en agement with the grinding-Wheel, and uring its movement in the outward direction remains pressed against thegrinding-"wheel to per mit the grinding o eration to be performed.

The motive flui I prefer to employ is water which escapes from the faucets 37, 42

through an opening 71 in the base-plate 14 into the basin in which the grinding-wheel, rotates. The speed of movement of the piston 49 in either direction is controlled by the back-pressure of the escaping fluid ahead. Thus by turning the plug-valves at the fancets to diminish or enlarge the fluid outlets the speed of reciprocation of the work-carrier may be increased or diminished by the atten dant, as desired. For example, by opening wide the cook 43, and partly closing the cock 38, the carrier may be caused in each opera.- tion to move at maximum in the inward direction, and at comparatively slow speed in the outward direction while the grinding is being performed. The best results in grinding knife-blades, for example, are obtained by grinding in but one direction and moving the work at a certain speed with reference to the speed of rotation of the grinding-wheel. My improvements permit the movements of the carrier to be readily controlled to effect the best results. The pipes 36, 41, and valve-chamber 28 also operate to hold the heads 25, 26 in fixed relation to each other, thereby dispensing with the use of tie-rods.

What I claim as new, and desire to secure by Letters Patent, is

1. In combination with a grinding-wheel and a reciprocal work-holder cooperating therewith, fluid-pressure means for operating said work-holder comprising a cylinder, a piston in said cylinder directly connected with the work-holder, a valve-chamber, fluidpressure inlets and outlets leading from said valve-chamber to said cylinder, and a slidevalve in said valve chamber for controlling the opening and closing of said inlets and outlets.

2. In combination with a grinding-wheel and a reci rocal work-holder cooperating therewith, fluid-pressure means-for operating said work-holder comprising a cylinder, a piston in said cylinder directly connected with the work-holder, a valve-chamber, fluid pressure inlet and outlet passages at opposite ends of said cylinder leading from said cylinder through the valve-chamber, a slidevalve in said valve-chamber provided with spaced pistons for controlling the admission into and discharge from the cylinder of the actuating fluid, and means for actuating the valve.

3. In combination with a grinding-wheel and a reciprocal work-holder cooperating therewith, fluid -pressure operating-means for said workholder comprising a cylinder, a piston in said cylinder directly connected with the work-holder, a valve-chamber, a fluid-pressure inlet passage leading from said chamber to the cvlinder, and a fluid-discharge outlet for the cylinder in said valvecharnber adiacent to said inlet. a fluid-pressure inlet passage at the opposite end of the cylinder leading into it from said valvechamber and a fluid-pressure outlet in said valve-chamber adjacent to said last-named inlet, a slide valve in said valve-chamber comprising a rod and spaced pistons, fluidpressure inlet and outlet ports for the cylinder in each end portion of said chamber, a valve rod, slide valves on the rod for opening and closing-the ports at each end of the chamber alternately, and reciprocating means for the rod.

4. In combination with a grinding-wheel and a reciprocal work-holder cooperating therewith, fluid-pressure operating means for said work-holder comprising a cylinder, a piston in said cylinder directly connected with the work-holder, a valve-chamber, fluidpressure inlets and outlets leading from said valve-chamber to said cylinder, a slide-valve device in said valve-chamber for controlling the opening and .closing of said inlets and outlets, and means for shifting the slidevalve to reverse the travel of the piston inthe final movement of the work-holder in one direction.

5. In combination with a grinding-wheel and a reciprocal work -.holder cooperating therewith, fluid-pressure operating means for said work-holder comprising a cylinder, a piston in said cylinder connected with the work-holder, a valve-chamber, fluid-pressure inlets and outlets leading from said valvechamber to said cylinder, a spring-controlled slide-valve in said valve-chamber for controlling the opening andclosing of said inlets and outlets, catch-mechanism for releasably maintaining said slide-valves in one position against the tension of its spring, and means actuated by said work-holder for engaging said catch'to free the valve and allow it to return under the action of its spring to normal condition.

6. In combination with a grinding-wheel and. a reciprocal work-holder-cooperating therewith, fluid-pressure operating means for said work-holder comprising a cylinder, a piston in said cylinder connected with the work-holder, a valve-chamber, fluid-pressure inlets and outlets affording communication between said cylinder and valve-chamber, a spring controlled slide-valve in said valvechamber governing the opening and closing of said inlets and outlets, and means for actuating the slide-valve comprising an operating lever connected with said slidevalve for moving it against the tension-0f its spring, catch-mechanism for releasably maintaining said lever in shifted position, and means actuated by the work-holder during its movement in one direction to engage said catch-mechanism to release it and cause said lever and slide-valve to be returned by the spring to their normal positions.

7. In combination with a grinding-wheel and a reciprocal work-holder cooperating therewith, fluid-pressure means for operating said work-holder comprising a cylinder,

a piston in said cylinder connected with the work-holder, a valve-chamber, fluid-pressure inlets and outlets afiordin communication between said cylinder an valve-chamber,

a spring-controlled slide-valve in said valvechamber for controllin the opening and closing of said inlets and outlets, and means for actuating theslide-valve comprising a lever fulcrumed near one end to a sup ort and pivotally. fastened between its on s to said slide-valve for moving said valveagainst the resistance of said spring, a lever fulcrumed on the machine havin a catch normally in the path of the lever i'y which said lever is releasably held in shifted condition, and means movable with said work holder for engaging said lever to move the catch and release the lever to ermit it and the slide-valve to be returned by the spring to their normal positions. i

8. In combination with a grinding-wheel and a reciprocal WOIk-I10ld61 cooperating therewith, fluidcomprising a cy inder having heads provided with fluid-pressure passages, spentfiuid discharge pipes, a valve-chamber proressure operating meansv vided with inlets and outlets, said heads being held to ether in fixed relation to each other by sai pipes and valve-chamber, a piston in said cylinder operatively connected With the Work-holder, and a valve in said with the Work-holder, a valve-chamber, a

fluidpassage in one cylinder-head opening into said cylinder and into the valve-chamber, a fluid-passage in the opposite cylinderhead openin into said cylinder and valvechamber an a s ent-fluid passage in said last-named cylin er-head leading from said valve-chamber to exhaust, and a valve in said valve-chamber controlling the opening and closing of said assa es.

G. BLESSING. In presence of- M. G. LEEKI'N, F. T. PUNDERSON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4384431 *Mar 31, 1980May 24, 1983Western Electric Company, Inc.Methods of and apparatus for preparing an end portion of a lightguide fiber
Classifications
Cooperative ClassificationB24B3/26