US743863A - Sieve-cleaner for bolting-machines. - Google Patents

Description

No. '743363. PATENTE) Nov. 10, 1903.'. w. GRIscoM an o. H. LGUTZENHISBR.

SIEVE CLEANER FR BOLTING MAG-EINES.'

APPLIGATNN FILED o'r. 25, 1962.

N0 MODEL.

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ivo. 743,5363.

UNITED STATES Patented November 10, 19O.

PATENT OEEICE.

a WALTER GRISCOM AND CHARLES H. LOUTZENHISER, OF PHILADELPHIA,

PENNSYLVANIA,`AISISIGNORS TO SAID GRISOOM AND THOMAS MCFEELY, OF PHILADELPHIA, PENNSYLVANIA, TRADING AS GRISCOM (in MOFEELY,

A FIRM.

SIEVE-CLEANER FOR BOLTINGV-MACHIN-ES.

SPECIFICATION forming part of Letters Patent No. 743,863, dated November 1-0, 1903.

Application filed October 25, 1902. Serial No. 128,737. (No model.)

To @ZZ whom it may concern.-

Beit known that we, WALTER Galsoort and CHARLEs H. LoUTzENnIsEE, both citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Sieve-Cleaners for Bolting- Machines, of which the following is a specilication. y

Ourvinvention relates to that class of sievecieaners i'or bolting-machines which employ a traveling brush having step-by-step movement imparted to it bymeans of a pawl which is caused to engage a bar 'or strip by reason of the shaking or gyrating movement of the sieve-frame. In prior devices of this class with which We are familiar the pawl has been mounted up'on the brush-carrier and engaged a bar secured to and moving with the sieveframe; and our invention involves mainly a reversal of these conditions-that is to say, the mounting of the pawl upon the sieverame and the provision of the brush-carrier with a bar for engaging the pawl. By this means the brush-carrying frame can be made.

lighter than usual, a less area of surface is presented for catching and holding the iiour dropping from the'sieve, the pawl is firmly supported, and the brushes can be so guided upon the frame of the sieve as to be properly maintained in contact with the under face of said sieve at all times.

In the accompanying drawings, Figure 1 is a longitudinal section of part of a halting-machine, showing one of the sieves and a cleaner therefor constructed in accordance with our invention. Fig. 2 is a transverse section of one of the sieves and its frame, showing an end View of the brush-carrier, this view being on a larger scale than Fig. l; and Figs. 3, 4, and 5 are longitudinal sections of part oi' the sieve and sieve-frame, showing the brushcarrier in elevation and illustrating the action of the driving-pawl upon the bar forming part of said brush-carrier.

In Fig. l of the drawings, lrepresents part of the casing of a bolting-machine, 2 one of the sieves of the same, and 8 one of the side Yframes of said sieve. Each of these side frames has secured toit a rail 4, upon which runs an antifriction-roller 5 oi' the brush-carrier, the latter comprising a pair of transverse bars 6, connected by a central longitudinal bar 7, and having vertical guides S for the brush-bar 9, which rests upon a spring 10, tending'to lift the bar, so that the tops ofthe brushes are maintained in constant contact with the under side of the screen 2. In the present instance there are two brushes. Consequently in order to effect a proper cleaning of the entire under surface of the screen 2 the brush-carrier Will be compelled to travel back and forth throughout halt' the length of the screen, and in order to elect this movement the bar 7 is engaged by a pawl 11-pivotally mounted upon a transverse rod l2, Which extendsacross from one side frame 3 to the other at the longitudinal center of the screen. Thedistance between the rod 12 and the upper surface of the bar 7 is less than the length of the pawl li, so that the latter is compelled to occupy an inclined position, such as shown in Figs. 3 and 5, except at points near each end of the bar and adjacent to the brushes, at which point-s the upper surface of the bar is recessed, as shown at 13, so that at these points the paw] can hang vertically without coming into contact with the surface of the bar. If therefore the screen frame is re- 'ciprocated longitudinally, as indicated by the left, as indicated by the arrowwin Fig. 3, or,

if inclined to the right, will engage said bar and move it to the right, as indicated by the arrow y in Fig. 5. The recesses 13 at the op posite ends of the bai-,7 provide for automatic reversal in the angle ot the pawl, and consepawl is provided with a depending pivoted yoke 14, which serves to weight the pawl and also bears against the under side of the bar in order to insure the clamping of said bar between the pawl and yoke, as shown in Figs. 3 and 5, except at the recessed ends 13 of the bar, as shown in Fig. 4.

The brush-carrier may be provided -with any desired number of equidistantly-spaced brushes, and it, as Well as the pawl, can be mounted upon other portions of the machine than the sieve-frame, if desired.

By using the bar 7 as part of the brushcarrying frame the use of longitudinal side bars is rendered unnecessary. Hence there is less area of surface beneath the sieve to catch and retain the material descending therefrom.

Having thus described our invention, we claim and desire to secure by Letters Patentl. The combination in a bolting-machine, of a pawl hung to a fixed pivot, with a traveling brush-carrier having a longitudinal bar engaging the pawl, and a yoke pivoted to the pawl, and embracing said bar whereby the latter is clamped between the pawl and yoke, substantially as specified.

2. The combination in a bolting-machine, of a pawl hung to a fixed pivot, with a traveling brush-carrier having a longitudinal. bar engaging the pawl, and a yoke pivoted to the pawl, and serving the double purpose of a Weight for the pawl and a clamp for holding the bar in engagement withthe pawl, substantially as specified.

3. A brush-carrier for a sieve-cleaner comprising transverse end bars, a longitudinal bar connecting the same, brush-bars vertically guided on said end bars, springs for supporting said brush-bars, and antifrictionrollers mounted upon said end bars, substantially as specified.

n testimony whereof we have signed our name to this specification in the presence of two subscribing witnesses.

Witnesses:

F. E. BEcHToLD, JAMES C. KRAYER.

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