US1487601A

US1487601A - Wood grinder

Info

Publication number: US1487601A
Application number: US618328A
Authority: US
Inventors: Priem Paul
Original assignee: American Voith Contact Co
Current assignee: American Voith Contact Co
Priority date: 1922-06-12
Filing date: 1923-02-10
Publication date: 1924-03-18
Anticipated expiration: 1941-03-18

Description

Marci 18 1924.

P. PR IEM WOOD GRINDER Filled Feb. 10. 1923 INVENTOR I F'HUL Paws v) JM J A TTORNE Y6 Patented Mar. 18, 1924.

UNITED STATES PAUL PRIEM, F HEIDENHEIM-ON-THE-I BRENZ, GERMANY, ASSIGNOR 'IO AMERICAN VOITH CONTACT COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

woon cnmnnn.

Original application filed June 12, 1922, Serial No. 567,778. Divided and this application filed February .10, 1928. Serial No. 618,328.

To all whom it ma 3 concern.

Be'it knownthat I, PAUL PRIEM, a citizen of the Republic of Germany,'and residing at I-Ieidenheim-on-the-Brenz, Germany, have 6 invented certain new and useful Improvements in Wood Grinders, of which the following is a specification.

The present invention relates to wood grinders, and particularly to feed devices for 10 advancing the wood blocks against the grind stone. The invention is particularly applicable to continuously operated wood grinders as distinguished from intermittently operating grinders, and the object of my 18 invention is to provide a mechanism which in ,operation \increases the pressure of the feed devices upon the interior of the charge by increasing the lateral thrust of the feed devices as the latter approach the charge 20 toward the grind stone.

The present application is a division of my copending application Serial No. 567 778, filed June 12, 1922, and is directed to the particular construction illustrated in the accompanying drawing, in which the figure illustrates in vertical section a grinder in which my invention is embodied in a single specific form.

As pointed out in my copending applicaso tion above mentioned, the devices in common use, prior to my invention, for continuously operating presses have commonly been of a type in which the charge in the hopper is advanced against the stone by means of feed chains provided with cross bars which travel upon the opposite inner faces of the hopper and engage the sides of the charge of wood blocks which are thus advanced toward the grind stone. In this type of construction the chains move in a substantially arallel direction and do not press the blocks 1n the hopper as they advance toward the stone, the result being that the effort of the feed chains is exerted with greater efiect at the sides of the charge than upon the mid portions of the latter. The present invention provides a feed device in which the charge is laterally compacted by the feed devices as thechargeapproaches the stone, the latenough pressure to advance the charge throughout its area with substantially uniform pressure at all points against the stone. Various ways of accomplishing this are illustrated my. .copending application above eral thrust exerted being sufiicient to exert mentioned, and the present application is confined to a single specific form of construction therein illustrated which has been found tobe eflicient in practice.

As indicated in the drawing, the structure comprlses a pair ofspacedstandards 1, in

which is journalled a shaft 2 carrying thethrough any appropriate arc.

In operation the wedge blocks gradually vary their inclination from a downwardly inclined position to a position more nearly horizontal. Thus, if the wedge blocks at the outset of their working travel assume an angle of 60 degrees from the horizontal, their speed of advance may be so much greater with respect to the speed of consumption of the charge by the stone, that as the wedge blocks approach the stone. they assume an angle of only from to degrees. It is obvious that this change in angular position of the Wedge'blocks exerts a lateral compression of the charge as it approaches the stone, so that a simultaneous forward feed and lateral compression of the charge takes place. The effective result is a substantially uniform thrust of the charge throughout its entire working area againstthe stone. The extent of angularvariation of the wedge blocks during their working travel may of ing t e latter against direction and thrust blocks mounted thereon and engaging a side of the charge, and serving by variation of inclination as they approach the stone to compact the charge.

2. A feed device for wood grinders or the like, comprising a receptacle through which a charge may pass, and means for advancing the charge through said receptacle, said means comprising an endless carrier, wedge blocks pivoted thereon and adapted to engage the charge, and means for driving the carrier constantly in one direction and at a speed in excess of the advance of the charge whereby the angular position of-the Wedge blocks with respect to the charge is varied.

3. A feed device for wood grinders or the like, comprising a receptacle through which a charge may pass, and means for advancing the charge through said receptacle, said means comprising a pair of endless carriers arranged on opposite sides of the charge, and a series of wedge blocks arranged on said carriers and. engaging opposite sides of the charge, together with means for, driving said carriers constantly in one direction and at' a speed in excess of the advance of the charge to cause the wedge blocks to gradually approach each other, and thus to compact the charge between the same. 7

4, In feed device for wood grinders or the likc. a series of wedge blocks arranged on opposite sides of the charge, carriers on which said wedge blocks are pivoted, means for advancing the carriers constantly in one direction and at substantially uniform speed in execs of the feed of the charge, together with supports against which said blocks exert their thrust durin their work travel.

5. In a wood grin er, a hopper in which the charge comprises a series of billets, the longitudinal axes of which are substantially parallel and horizontal, and a feed device arranged at'a side of the hopper which is substantially parallel to the longitudinal axes of the billets, said feed device comprising members advancing toward the stone and shaped to impart both a forward feed thrust and also a lateralcompacting thrust to the billets constituting the charge as the latter approaches the stone.

-6. In a wood grinder, a hopper in which the charge comprises a series of billets, the longitudinal axes of which are substantially parallel and horizontal, and a feed device arranged at a side of the hopper which is substantially parallel to t-he'longitudinal axes of the billets, said feed devices comprising members advancing toward the stone, and changing position with respect to the charge as they approach the stone to effect a forward feed and a lateral compacting effort upon the billets constituting ,the charge as the latterapproaches the stone.

7 7. The method of feeding achar'ge in a wood grinder or the like, which consists in applying to the charge a feed thrust to advance the charge, and converting at least portion of said feed thrust into a lateral compacting thrust as the charge advances.

In testimony whereof I have signed my name to this specification.

PAUL PRIEM.