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Publication numberUS875228 A
Publication typeGrant
Publication dateDec 31, 1907
Filing dateDec 12, 1906
Priority dateDec 12, 1906
Publication numberUS 875228 A, US 875228A, US-A-875228, US875228 A, US875228A
InventorsErvin E Witham
Original AssigneeErvin E Witham
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for filling core-boxes.
US 875228 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

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PATENTED DEC. 31, 1907.




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Specification of Letters Patent.

No. 875,228. Patented Dec. 31, 1907.

Application filed December 12,1906. Serial No. 347.412.

molders use, is plastic and somewhat sticky, and is apt to cake unless suitable agitators and propellers are supplied. A short shaft 16a extends down from the section 10 into the section 11, and has the projecting arms 22 to agitate the sand when it is in this cornpartrnent.

In the guide plate 12 is arranged a sliding plate 23, the end of which forms a gate 24 to close up the opening between the sections l0 and 11, the cut-away portion of the gate, which allows the gate to slide, being closed To all whom it may concern:

Be it known that I, ERVIN E. WITHAM, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Apparatus for Filling Core-Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked when the gate is shut by a web 25 on the thereon, which form a part of this specificaplate 12. The plate 23 slides in the guide tion. ways 26 in the guide plate 12, and the plate 12 is preferably provided, on its end, with a bracket 27 that assists in supporting a pipe 28, the end of which enters the section 11 directly underneath the gate 24. The pipe `23 is supplied with a valve 29 which has turning means 30, and a lever 31 is installed to actuate the valve 29, the upper end of the lever 31 engaging a pin 32 on the plate 23 to work the plate and consequently the gate, the whole adapted to be manually operated by means of the handle 33.

In operating this device, the sand is put into the hopper and it is fed down against the gate 24. When the handle 33 is operated, the gate 24 is opened and the sand passes down into the section 11, and after considerable sand has passed through, the handle is again thrown back into the position shown in Fig. l, which again closes the gate 24, but opens the valve 29 in the pipe 23. This pipe conveys steam or air at a pressure of say 40 ounds, and this pressure drives the sand out of the section 11 into the core-box. It will thus be seen that by an intermittent motion of the handle 33, a core-box can be thoroughly iilled and tightly packed with sand, even to its farthest recesses, by reason of the pressure blowing the sand' in the box.

I prefer to install a thimble 37 on the outlet of the section 11, the outer end of this thimble being adaptedfor dierent size coreboxes, there being a separate thimble for each size of box to be used. A soft rubber ring 33 is fitted on the end of the thimble 37 so that the juncture between the thimble and the core-box will be tight, and there will be no scattering of sand from between ratus and the core-box.

This invention relates to an apparatus for filling core-boxes with sand, and is arranged to put the sand in, under pressure, so that it will thoroughly iill the recesses that may be in the core-box, and be well packed in the box so that a smooth core is the result when the box is removed.

The invention is further designed to force the sand into the core-box by pneumatic or steam pressure, and my apparatus embodies means for controlling the entrance of the sand to the box, and for controlling the piessure on the sand when it is forced into the box.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a vertical section of the apparatus, and Fig. 2 is a section on line 2, 2, in Eig. 1. Fig. 3 is a section of a detail of the means for admitting sand and the pressure to the apparatus, this ligure showing a modified form.

Fig. 4 is a vertical central section of a modified form of apparatus with a swinging gate.

rIhe apparatus is in the general shape of a hopper which is made up of the upper conical section l0 and the lower conical section 1l, these securing between them a guide plate l2. The plate 10 has, on the top, suitable i arms 13 which support a bearing 14, and another bearing 15, near the bottom of the section 10, serves, with the bearing 14, to support a shaft 16. 0n the top of this shaft is a pulley 17 for imparting motion to the shaft, and suitable agitators and Scrapers 18 are arranged on the ends of the arms 19, and secured to the sleeve 20 which is arranged to rotate with the shaft 16. In the lower end of the section 10 is also secured a pro- It may be desirable not to have the gate peller or conveyer 21 which insures the of the hopper and the valve of the pipe downward motion of Ilthe sand, which, for moved together, and I can supply a structhe app ature shown in Fig. 3. In this case the plate 12 is provided with a bracket 34, on the end of which is pivoted a lever which is adapted to be manually operated. and the upper end of which moves the plate 23 to open or close the gate 24. In this case the pipe 28 is provided with a hand valve 36.

In Fig. 4 I illustrate a modified form in which the hopper 10 is provided, on its lower end, with a throat 10a, and has the lower section 11, and in the section 11 and adjacentto the bottom of the throat 10a is a pivl otal in 39 which has secured thereto, the eye l 40 ofp a swinging gate 4], which has the packing disk or ring 42. The pivotal pin 39 is moved to actuate the gate by means vof a lever 43 which is connected, by means of a link 44, with a second lever 45 which is fastened to one end of the stem of a valve 46, the other end of the stem being actuated by the handle 47, the valve 46 being in the air pipe 28. This mechanism operates so that when the valve 46 is opened, the gate 41 is swung so as to close the opening, and the air pressure coming from the pipe 28 assists in holding the gate 41 shut. The valve 46 may be of the ordinary three-way venting style, and can be provided with a vent 48 so that when the air from the pipe 28 is shut off, and the gate 41 opened, the air in the conical portion 11, on the core-box, is allowed to pass out through the vent opening 48, and does not blow the sand up through the hopper l0. l

This style of apparatus is is very stable, and provides ing structure.

Having thus described my invention, what I claim is 1. An apparatus for filling core boxes comprising a hopper, a gate to close the ho per, a pipe to convey compressed iluid to t e hopper beneath the gate, a valve in the pipe, and means for simultaneously closing the gate and opening the valve, and vice versa.

2.A An apparatus for filling core boxes comprising a hopperl` a swinging gate adapted to close the hopper, a pipe entering the hopper beneath the gate, a valve in the pipe, and means for simultaneously opening the valve and closing the gate, and vice Versa.

3. An apparatus for filling core -boXes comprising a hopper having a reduced portion therein, a swinging gate adapted to close the reduced portion, a pipe conveying pressure to the hopper beneath the reduced por,- tion, a valve in the pipe, means for operating the valve, and a connection l'rom the valve to the gate acting to close the gate when the valveis opened.

In testimony that I claim the foregoing, I have hereunto set my hand this 11th day of December 190 ERVIN E. VVITHAM.

an easy operat- Witnesses:


cheap to make,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2423341 *Oct 3, 1945Jul 1, 1947Peterson Axel HBlowhole plug for sand boxes or containers
US2435858 *Oct 4, 1944Feb 10, 1948Whitehead Donald ECore manufacture
US2510417 *Apr 28, 1948Jun 6, 1950Rehkiau Walter EFoundry mold practice
US2553626 *Mar 30, 1949May 22, 1951Eastern Clay Products IncBlow plate for core blowers
US2605021 *Jul 14, 1949Jul 29, 1952Spencer Churchill Henry WinstoDispenser for an inverted container with means for locking said container thereto and a self-closing outlet element
US2637881 *Jan 22, 1949May 12, 1953Peterson Edwin FCoremaking machine
US2847736 *Dec 31, 1954Aug 19, 1958Dietrich PulvermacherDevice for making sand molds for metal casting
US2855642 *Jun 18, 1954Oct 14, 1958Polygram Casting Company LtdApparatus for producing hollow moulded articles
US2879921 *May 11, 1955Mar 31, 1959United Shoe Machinery CorpCement handling mechanism
US2959893 *Jul 28, 1958Nov 15, 1960Agrimpex Mezogazdasagi KulkereMethod for the treatment of beet clusters preparatory to sowing
US4395131 *Sep 30, 1980Jul 26, 1983O. A. Newton & Son CompanyApparatus for agitating, conveying and weighing particulate material
US4944637 *Aug 14, 1989Jul 31, 1990Fletcher Gilbert KValved seed outlet
Cooperative ClassificationB61D5/004