US917636A - Expansible core for molds. - Google Patents

Description

P. 0. MERILLAT. EXPANSIBLE (JOBS FOR MOLDS. APPLICATION FILED. D30. 21, 1908.

91 7,636 Patented Apr. 6, 1909.

Q LEE].

314 uaml'or PETER O. MERILLAT, OF WINFIELD, IOWA.

EXPANSIBLE CORE FOR MOLDS.

Specification'of Letters Patent.

Application filed December 21, 1908.

Patented April 6-, 1909'.

Serial No. 468,679.

To all-whom it may concern: Belt known that I, PETER O. MERIL AT, a citizen of the United States, residing atv'infield, in the county of Henry and State of lowa, have invented certain new and useful Improvements in Expansible Cores-for Molds; and I do 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.

T his-invention relates to improvements,

ed claim.

In the accompanying drawings, Figure 1 is a horizontal sectional view through a core constructed in accordance with the invention; Fig. 2 is a cross sectional view of the same on the line 2-2 of Fig. 1; and Fig. 3 is a similar view on the line 3+4) of Fig.

In the embodiment of the invention, I providea tubular shaft 1 on which adjacent to its outer end is secured a sleeve or collar 2, said collar being preferably secured to the shaft by a set screw 3. ()n the collar adjacent to one end is formed a series of radially projecting apertured lugs 4. On the shaft 1 and spaced a-suitable distance from the sleeve orcollar 2 is a second sleeve 5 which is rigidly held in position on t-heshaft by a set screwfi and has formed thereon adjacent to one end a series of radially projecting-lugs 7. The body or shell of the 'core is formed of a series of segmental overlapping plates which are bolted or otherwise secured to longitudinally disposed angle iron ribs 8. The upper and lower plates 9 and 10 of the shell extend part way around each side of the same and are re-inforced by narrow longitudinally disposed plates 12 which are bolted or otherwise secured along the center thereof by the bolts or rivets which secure the plates 9 and 10 to-their angle iron supportin' ribs. The

sides of the cylindrical shell or ody of the core are formed by inner and outer overlap-' ping side plates 13 and 14.. The upper edges of the plates 14 extend beneath the lower edges of the upper plate 9 and said upper edges of the plates 14 are secured to sup orting ribs, as shown. The upper ed es o the inner side plates 13 are also secureil to angle ironribs 8 and said lates 13 are spaced from the outer side p ates 14 and between said plates, the upper edges of the lower plate 10 project. The lower edges of the plates 13 project below the angle iron ribs 15 but are not secured thereto, said ribs 15 serving simply as guides to brace the overlapping edges of the guide plates 13 and 14 and the lower plate 10.

The segmental plates forming the shell of the core are supported in operative position to form a substantially cylindrical body by means of radially projecting inclined supporting arms 16 and 17. The outer ends of the arms 16 are pivotally connected at their outer ends to the angle iron ribs 8 and at their inner ends are pivotally connected to the lugs 4 of the collar 2. The arms 17 are pivotally connected at their outer ends to the ribs 8 and at their inner ends to the lugs 7 on the collar 5.

Slidably mounted on the shaft 1 is an expanding sleeve 18 on the inner end of which is formed a series of apertured lugs 19 which are connected to the arms 17 by links 20. On the outer end of the shaft is screwed a socket 21 and in said end is secured a nut 22,

said nut being provided on its outer end with radially projecting apertured In S 23 through which are inserted'fastening bo ts 24 having hook-shaped inner 'ends ada ted to engage with the inner end of the soc et 21.

Adapted to be screwedin and out of the nut 22 is an expanding screw 25 having a reduced outer end 26 whereby a stop shoulder 27 is formed on the screw. An exapanding yoke 28 is engaged with the reduce end 26 of the expandlng screw and has its inner ends bolted or otherwise secured to the collar 18 whereby when'the screw 25 is turned in one direction or the other in the nut 22, said sleeve 18 will be moved inwardly oroutwardly thus spreading or retracting the arms 17 by means of the connecting links 20.

When-the arms 17 are thus spread or 'reare arranged bearing washers I end of said reduced portion is secured a hand wheel 30 by means of which the screw is operated.

By means of an 0 crating mechanism constructed as herein snown and described, the overlapping sections of the core may be readily expanded or retracted, to. vary the size 01' the core or in order to facilitate this operation, I provide a coil spring 31 one end oi which is secured to the fixed collar 2 by a connecting rod 32, while the opposite end of the spring is secured to the slidmg collar 18 by a connecting r0d33. The tendency of the sprin 31 is to draw the sliding sleeve 18 inward y and thus aid the movement of the sleeve by the expanding screw hereinbel'ore described, which will permit the screw to be' readily turned by the hand wheel 30. The addition of the retracting spring 31 will be found especially desirable when the core rests upon the ground or is unsupported which necessitates the lifting of a greater part of the structure when the segmental plates of the shell are expanded.

In the construction of the core, I prefer-- ably secure the segmental plates to the ribs 8 by means of bolts 32 on the inner portions of which between adjusting nuts 33 and the ribs areal-ranged coiled springs 34 by means of which a yielding connection is formed between the ribs and plates to permit thelatter to adjust themselves when thearms 16 and '17 are operated to increase or diminish the size of the core. In connection with the core, I prefer to employ adjustable guide hoops 35 which are adjusted to the size it is desired the core should be and one of said hoops is then engaged with each end of the core. The core is then expanded until the segmental plates engage the hoops which will'accurately determine the size of the core and prevent fur- 29 and on the ther expansion of the same.

The'hoop may be adjusted in any suitable manner to increase or diminish the size of the same and is here shown as having on one end a stud 36 adapted to be engaged with one of a series of apertures 37 formed in the opposite end as, shown in Fig. 2 of the drawings.

From' the fore oing description, taken-in connection with t is accompanying drawings, the construction and operationoi' the invention will be readily understood without requiringa more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the 'principle or sacrificing any oi the advantages of the invention as defined in the appended claim.

laving thus described and explained the nature of my invention, whatl claim as-new and desire to secure by Letters-Patent is:

In a core of the character described, a tubular shai't, a series of collars fixedly secured to said shaft, a series of supporting ribs, supporting arms to pivotally connect said ribs with said collars, a series of overlapping segmental plates secured to said ribs to form the body of the core, an adjusting collar slidahle on said shai't, a retracting spring to connect said collar with one of the fixed collars on the shaft, and an expanding screw operativcly connected with said collar whereby the latter is pro ected and retracted to expand and rctract the sections of the core.

1n testimony whereof l have hereunto set my hand inpres'ence of two subscribing witnesses.

PETER I. M Elillilinf l. Witnesses: I

AUnA ISLOAN, G. A. KIZBAUII.

Images