US1027695A - Clamp for flasks. - Google Patents

Description

E7 G. GOVBRT. GLAMP son rLAsKs.

APPLICATION TILE!) SEPT. 11, 1911.

1,027,695. Patented My 28,1912.

zzdeizorf COLUMalA PLANQURAPH co.,WASHlNuToN'. D. c.

UNITED sTATEs PATENT oEEioE,

EDSON C. COVERT, 0F CHICAGO, ILLINOIS, .ASSIGNOR TO AMERICAN STEEL FOUNDRIES,

OF NEW YORK, N. Y., .A CORPORATION OF NEW JERSEY.

CLAMP FOR FLASKS.

Specification of Letters Patent.

Patented May 28,1912.

To all 'whom t may concern `Be it known that I, EDsoN C. CovERT, a citizen ofthe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Clamps for Flasks, of which the following is a specification.

My invention relates to clamps and has reference to a novel, quick-acting, pneumatic clamp for use on flasks.

In the art of molding, particularly in co nlnection with the use of molding machines,

clamps are 'necessary for holding the flask and drag or cope in place while the jarring or tamping action is secured. In order to secure the best results these clamps should be so constructed that they may beV applied or removed quickly and hold the parts securely together. I have therefore designed and show in the accompanying drawings a form of clamp adapted for use on the pattern plate of a molding machine, this clamp being actuated by fluid pressure and being self-adjustable to variations 1n the articlesto be clamped.

My invention will be more readily understood by reference to -the accompanying drawings, wherein,

Figure 1 is a section through a pattern plate and flask, my novel clamp being shown iielevation; Fig. 2V is a bottom plan view of the pattern plate a part thereof being broken away, and Fig. 3 yis, an end elevation of the clamp, flask and plate. i

Referring more particularly to the" draw: ings, itwill be seen that to a plate 10, having downwardly projecting flanges 11, 12,' I attach by means of suitable bolts, a cylinder 13. This cylinder is connected at 14 to a suitable source of fluid pressure, not shown. Within the cylinder is seated a piston 15, connected to a piston rod 16. To the end'of the rod 16 is connected a bifurcated member 17, the two legs of the member 17 passing through openings provided therefor in the depending flange 12. Near the outer'ends Vof the member 17 and extending downwardly is provided a recess 18, having a verf tical wall on one side and on the other sideV ing jaw 21 is mounted for oscillation on the pin 20, the pin passing through a slotted opening 22, in the body portion of the jaw.

`By means of the slot, the clamping liaw is permitted a limited bodily movement in line vwith the Slot. The lower end of the jaw 21v is provided with an opening through which a pin23 is inserted, this pin 23'being preferably of substantially the same size as the opening 18. A flask 24: is shown seated on the pattern plate, this ask being provided with a flange 25 with which the jaw member 21 coperates.

As shownin Fig. 2, I prefer to provide two clamps to each pattern plat-e, these clamps being mounted on the diagonal corners. Inasmuch as the other clamps are duplicates of the onerjust described, a further description willnot be made.

-rIhe operation of the device is as follows: A flask is placed on the base, the jaw of the` clamp being then in the dotted line position of Fig. 1. Fluid under pressure is admitted to the rear of the piston 15, thus causing its advance and the advance of the member 17, within the recess 18 of which the pin 23 is seated. This will cause the jaw member to rotate about the pin 20 and bring the jaw of the member 21 into contact with the vflange 25 of the flask. Further advance of the piston and the member 17 willcause the unseating of the pin 23 from the recess 18, and tend to shift or wedge the jaw member downward because of the incline 19, this shift-ing being permitted by the slot 22. It will be seen that' by this means an extremely strong gripping action is secured and that the holding power will be maintained easily and without maintaining the full fluid pressure necessary to`secure the gripping action.

I claim:

1. A clamp comprising, in combination, a

support, a clamp member rotatably and slidably connected to said support, a reciprocating member arranged to act upon said clamping member, and Huid pressure means for actuating said reciprocating member, substantially as described.

2. A clamp comprising, in combination, a base, a clamping j aw rotatably and slidably connected to said base, a reciprocating member arranged to cause rotation of said clamping jawwhen shifted in one direction and rotation and wedging when shifted in another direction, and means for actuating said reciprocating member, substantially as described.

3. A clamp comprising, in combination, a

base Vhaving a pin7 a clamping jaw provided with a slot, said pin being seated in said slot, a pin carried by said clamping jaw, a reciprocating member having a recess and an inclined approach to said recess, the pin on said clamping jaw cooperating with said recess and said inclined approach, and means for actuating said reciprocating inember, substantially as described.

4. A clamp comprising, in combination7 a support, a slotted lever having a clamping jaw associated with said support, a reciproeating member, and means associated wit-h said reciprocating member and said lever and so arranged that on the motion of said reciprocating member in one direction said. lever is simultaneously rotated and wedged downward, and means for shifting said reciprocating member, substantially as described.

EDSON C. COVERT. Witnesses:

HENRY J. KLAER,

STANLEY H. KERsHAw.

Copies of this patent may be obtained for ve cents cash, by addressing the Commissioner of Patents, Washington, 1D. C.

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