US1775110A

US1775110A - Apparatus for applying abrasive to polishing wheels

Info

Publication number: US1775110A
Application number: US293244A
Authority: US
Inventors: Joseph S Porter
Original assignee: D & H Scovil Inc
Current assignee: D & H Scovil Inc
Priority date: 1928-07-16
Filing date: 1928-07-16
Publication date: 1930-09-09
Anticipated expiration: 1947-09-09

Description

Sept. 9, 1930. J. s. PORTER APPARATUS Fon APPLYING ABRASIVE To PoLIsHING WHEELS Filed July 16, 1928 6o therorsteehpusesaroundthesep Patented Sept. `9, 1930 UNITEDsrArI-:s PATENr OFFICE JOSEPH S. PORTER, Ol' PORTLAND, CONNECTICUT, ASSIGNOB TO D. H. 800m IN'- COBPORATED, OF HIGGANUM, CONNECTICUT, A CORPORATION QF CONNECTICUT APPARATUS FOB APPLmG ABRASIVE TO .'POLISHING 'WHEELS Application med July 18, 1928.V Serial No. 293,244.

i 1o tively inexpensive to build, simple to operate,

. and by means-of which the abrasive can' be rapidly applied in a manner that will ensure a coating of uniform density even thickness and ilat surface on the peripheries and parallel with the axes of the wheels that are treated thereby.

This apparatus has an endless belt that is moved beneath a hop er from which granu- -lar abrasive is in the esired quantity allowed to escape to the u per surface of the belt,

the ho per being dp ed to Keep the abrasive warm. There is a A receptacle, referably electrically heated, containing esive, for instance animal glue.

The wheel to be coated is held by a clamp that is rotatably mounted at the end of an arm so pivoted that the wheel may be swung overto a position adjacent to the adhesive re- Y ceptacle in order that the operative -may apply theadhesive to the peri heral surface of the whel and then swing ack and pressed upon and allowed to roll on the travehng belt carrying .1. the abrasive until the desired amount of abrasive is gathered by the adhesive. The wheel is then removed .and placed in an oven and dried, these steps be- `mg repeated until the abrasive coating on the 4peri he of the wheel has reached the reggiredpthilciness and density.

the accompanying drawings .Fl` 1 shows a side elevation of the apparatus. 1g 2 is a view looking down on the apparatus with parts in section. Fig. 3 shows a section of the abrasive holding hopper. 4 Supported in suitable bearings at one end of the apparatus is a shaft 1 attached to which is a driving pulley 2. A t the other end is a shaft 3 loose on which .is a driven plley 4. An endless belt 5, which ma be eys.

esirably electrically heat-- material of a different degree of The shaft 3 is mounted in the upper ends of angle arms 6 which are pivoted in supports 7 and are engaged by springs 8 in such manner as to keep the belt under proper tens1on. m

Fixed on the shaft 1 is a gear 9 that is engaged by a pinion A10 on an arbor 11 carrying a worm wheel 12 which is en aged by a worm 13 driven by a motor 14. l en the motor is in action the Worm, worm wheel, pinion and gear rotate the driving pulley which gives the belt a slow travel.

Sup orted over the belt near the driving end o the apparatus is a hopper 15 for receivmg the granular abrasive. The hopper shown is divided vertically into two compartments by a casing 16 which may contain water and which is provided with electrical heating units 17 for the purpose of warming the abrasive. Near the bottom of the hopper is a vhorizontal partition 18 with openings 19 through which the abrasive may flow from the upper compartments into spaces 20 at .the bottom of the hopper. Through the bottom of the hopper are slots 2l which permit the escape of abrasive from the spaces 20 onto the belt.

Rods 22 are provided for closing the openings 19 andstoppin the downward flow of abrasive. These r s are loosely supported and at their upper ends are pins 23. If a rod is lifted and is turned sothat its pinwill rest upon the to of the water jacket an opening 19 is left ree forI the escape of abrasive. When a rod is turned so that. its pin is disengaged from the top of the water jacket it will dro into an opening 19 and stop lthe flow of a rasive.. By separating the hopper into two compartments abrasive material of one ineness may be kept in one, and abrasive iineness or character may be kept in the other, allowing the apparatus to be readily used for feeding adhesive havin grains of the desired quality and size to the lt.

On a support 24 at the other end of the apparatus Js-a receptacle 25 for containing t e adhesive. This receptacle is desirably set in a casing 26 that may contain water and which may be heated by an electrical heating lo.

"shaft 3 is an arm 30 which atits free end has a pin S19-that extends forwardly over the belt. l Loose on this pin is a sleeve 32. Fas'- tened. to the rear endof this sleeve is a clamp ldisk 33and adjustableon thefront end of the sleeve is a clampA disk 34 that isheld in position. by a nut 35which is turned upon the cuickly applied to the e and its density well aratus la coating of abrasive of i the wheel rotates with the movement of the belt the peripheral surface is evenly coated, and as the axis of the wheel is. arallel with the plane of the belt andthe plat orm beneath the belt, the face of the abrasive coating" that is formed, on the periphery of lthe' wheel is smooth'and flat and at all points equally disthreaded 'front end of the sleeve. The wheel tant from the axis, thus ensuring accurate to betreated isslipped upon the sleeve and then clamped between the disks by the nut. By means of thecrank handlethe arm may be swung so as to carry the wheel fromv above the belt, the position illustrated 'in full line inJ Fig. 1, to a osition adjacent tothe adhesive receptac e, as indicatedby the dotted lines in that ligure.

Below the belt and beneath the operative l position of the wheel is a platformv 36 and pivoted to the crank handle is a foot 37 that may be turned down sofas to'rest on'the top of the platform when it is desired to hold the wheel above and out of contact with the belt. Adjacent to and below the driven pulley is areceptacle 38 for receiving suchabrasive as is not picked up from the belt by the adhesive on the wheel, and extending from the adhesive casing to aposition above the belt is a shield 39 Iwhich is designed to catch any dripof adhesive from the wheel when the adhesive is applied to the periphery thereof.

In use a wheel clamped on the arm is lirst swung adjacent .to thev adhesive receptacle and 1n this .position the operative witha brush or other suitable means coats its periphery with adhesive. /The wheel is then swung back onto the traveling belt and the adhesive allowed to vcollect abrasive therefrom, the wheel being rotated by the movement of the belt so'that its whole periphery is coated. The operative by means of the crank handle maypress the wheel down into the abrasive if desired to ensure the necessary density of the abrasive picked up by the adhesive on the periphery of the wheel. When 'a sufficient quantity of abrasive has been collected by the adhesive on the periphery of the wheel the nut is unscrewed, the outer clamp plate taken off and thek wheel removed and placed in an oven for drying.

After the coating has \beeny suiiiciently baked the wheel may again be located on the arm and coated with adhesive and then al lowedto pick up an additional layer of abrasive,v These steps may be repeated asoften as desired until the coating of abrasive on the periphery ofthe wheel has reached the desired thickness and density. Whenonewheel is being dried another wheel may be treated by theapparatus so that there is no lost time.

grinding or polishing of the article which. is subjected to the action of the wheel thus produced. l j

The invention claimed is:

1. An apparatus of the character comprising an endless belt, mechanism for described comprising an endless fbelt, mechanism for .imparting movement to the belt, means for depositing abrasiveon the upper surface of the belt, an oscillatory arm, means for oscillating said arm, a pin extending from said arm over and parallel withthe upper'surface. of thebelt, a sleeve rotatable on. saidpin, a

clamp disk fixed to said sleeve, a clamp disk detachably mounted on said sleeve, means for securing said-detachable disk on said wheel, and a platform b elow the belt'and' beneath said clamp disks- 'i 3. An apparatus of the character described comprising an endless belt, mechanism for y imparting movement to the belt, means for depositing abrasive on the upper surface of the belt, an adhesive receptacle, anoscillatory arm, a` wheel holding clamp rotatably mounted on said arm, means .for oscillating said arm and swinging said clamp between the adhesive receptacle and the upper surface of the'belt, and a platform below the belt and beneath 'said clamp.

4. An apparatus of the character described comprising an endless belt, mechanism for imparting movementA to the belt, a hopper adjacent one end of the belt for depositing abrasive on vthe upper surface of the belt,

electrical means for heating said hopper, an adhesive receptacle adjacent the other end of the belt, electrical means for heating said receptacle, an oscillatory arm, a wheel holding clamp rotatably mounted on said arm, means for oscillating said arm and swin ing a wheel held by said clamp between te adhesive receptacle and into engagement with the upper surface of the belt and causlasv B5 p imparting movement, to the'belt, a hopper ing the wheel to rotate by frictional engagement with the belt, and a platform below the belt and beneath said clam v 5. Apparatus for applying a rasive to the peripheral surface of a grinding or polishing wheel comprising a frame, pulleys adjacent the ends of the frame, an endless belt running over said pulleys, means for depositing abrasive on the belt, oscillatory means for clamping the wheel to be treated with its axis extending across and parallel with the upper surface of the belt, means for swinging said clamping means and causing the peripheral surface of the wheel to engage with and be rotated by frictional contact with the belt, and a stationary table beneath the locality of contact of the wheel with the belt. 6. Apparatus for applying abrasive to the peripheral surface of a grinding or polishing l wheel comprising a frame, pulleys adjacent the ends of the frame, an endless belt running over said pulleys, means for depositing abrasive on the belt, freely rotatable means for clamping the wheel to be treated with its axis extending acrossand parallel with the upper surface of the belt, means for swinging said clamping means and causing the peripheral surface of the wheel to engage with and be rotated by frictional con-` tact with thel belt, and a stationary table beneath the locality of contact of the wheel with the belt.

7. Apparatus for applying abrasive to the peripheral surface of a grinding or polishing wheel comprising a frame, pulleys adjacent the ends of the frame, an endless belt running over said pulleys, a hopper :for depositing abrasive on the belt, electrical means for heating said hopper, freel rotatable means 40 for clamping the wheel to e treated with its axis extending across and parallel with the upper surface of the belt, means for swinging said clamping means and causing the peripheral surface of the wheel to engage with p and be rotated by frictional contact with the belt and a stationary table beneath the locality of contact of the wheel with the belt.

8. Apparatus for applyin Aabrasive to the peripheral surface of a grin ing or polishing 5 wheel comprising a frame, pulleys adjacent the ends of the frame, an endless belt running over said pulleys, means for depositing abrasive on the belt, a clamp for gripping the wheel to be treated, said clamp being rotatably mounted on an oscillatory axle that extends across and parallel with the plane of travel of the upper surface of the belt,- means for swinging said axle and clamp to- 4ward and from the belt, and a stationary 3" table extending beneath the upper length of the belt.

JOSEPH S. PORTER..