US1244222A - Head-locking mechanism. - Google Patents

Description

J'. A. McCASK'ELL.

HEAD LOCKING MECHANISM.

APPLICATION FILED JAN. l9. 19x5.

3 SHEETS,SHEET I.

Patented Oct. 23, 1917.

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I. A. McCASKELL.

HEAD LOCKING MECHANISM.

APPLICATION FILED JAN. :9. 1915.

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J. A.. McCASKELL.

HEAD LOCKING MECHANISM.

APPLICAHON FILED JAN. 19.. 1 15.

Patented Oct. 23, 1917.

3 SHEETS-SHEET 3.

.msrnn A. MecAsKELnor SALT LAKE CITY, UTAH, nssrenon, BY MESINE Assisi?- MENTS, TO UNITED FILTERS CORPORATION, A CORPORATION or DELAWARE.

' HEAD-LOCKING- MECHANISM- Specification of Letters Patent.

Application filed January 19, 1915. Serial No. 3,143.

Locking Mechanisms, of which the followingis a specification.

My invention which relates to certain new and useful improvements 'in head-closing mechanisms for all kinds of tanks or receptacles, has been found of great value when used in'connection with apparatus for separatin and filtering solids of whatever nature rom liquids, the present invention being an improvement on and shown in con nection with the locking mechanisms disclosed in Patents Nos. 1,015,960, dated J anuary 30, 1912, and 1,015,961, dated January 30,1912, issued to D. J. Kelly.

The present invention consists, essentially of an improved quick-locking mechanism employingan automatic toggle arrangement whereby the motion used in unlocking the connection between the movable head and the tank is also automatically used to positively move said head at any desired distance from the tank,the reverse positive motion moving the head into position against the tank is automatically used to positively lock said head against the tank thereby giving a fluid tight joint between the open end of the tank and the movable head therefor.

In the accompanying drawings forminga part of this specification and in which similar reference characters indicate like parts in the several views;

Figure 1 is a top plan view of a filter press. embodying m invention.

Fig. 24s a side elevation of the same.

Fig. a detail of a toggle mechanism to be referred to. I

Fig. 4 is a top plan view ofafilter press showing a head locking mechanismof modified'form. I a

Fig. 5 is a side elevation of Fig. 4;

Fig. 6 is an elevation showing a means for automatically controlling the linear motion of the carriage.

Fig. 7 is an enlarged end view of the same.

. In the said former patents are disclosed arrangements for hand and hydraulically locking. the head connection between the tank and head or filter carrier. I have found that both these arrangements are suit.-

Patented Oct. 23, 1917.

able for'the purposes for which they were designed, but it has since been found that in certain practice the head locking devices are positive and that the removal of the head and its carrier from the tank or movement of same intoposition toward the tank is not positive enough. In making this movement positive, through the proper motor actuating device, I have combined the unlocking and traveling motion and traveling and locking motion in such away that a thoroughly positive and most economical effect is gamed, thus enabling one operator to effectively and'positively unlock, open,

close and lock several pressure tanks at will.

This object is attained by the use of suitable mechanism operated by motor and transmission means combined with toggle and tripping devices which I will hereinafter describe and claim.

Referring to Figs. land 2, the locking head, A, of the pressure tank, A, is, like a in previous patents, mentioned, provided with a rigid shaft, 1, which extends outward from its center and axially in line with the tank, said shaft having, a screwthreaded outer end. On the shaft, 1, is slidably mounted a sleeve, 2, having ears or lugs, 2, to which are pivotally mounted the inner ends of the radially disposed locking levers, 3, the outer-ends of which are curved or cam-shaped and adapted to slidably operate between suitable lugs or ears, 4, projecting from the front face near the periphcry of the head, suitable springs, 5,- being also preferably employed and against which the outer edges of the levers substantially bear whereby the springs assist in maintaining the levers against the lugs. In the foregoing respects, the levers and their means of attachment do not depart materially from the substantially similar parts found in the aforesaid rior patents.-

The sli ing sleeve or collar, 2, is formed with other lugs or, ears, 6, and to these are pivoted the rear ends of links, 7, the for-. ward ends of which are in turn pivoted to the rear ends of similar links, 8 and 9. The front ends of the links, 8, are pivoted to the movable cross-bar, 10, and thefront ends of links, 9, are pivoted to the lugs, 11, of a suitable collar, 12, against the outer face of which bears a nut, 13, which is threaded to the outer end of the shaft, 1, and is designed to adjust the tension of the head, A, of the tank, for when the nut is rotated, it causes the lever spacing collar, 2, to move forward or backward and in this manner the tension of head, A, against a gasket usually placed in a groove in the ring, 14, of the tank can be regulated at will. The tension-adjusting nut, 13, is constructed and operated substantially as set forth in prior patents be fore mentioned. 7 From the foregoing description it will be apparent that links, 7

8 and 9, constitute a toggle-lever connection which is actuated by the cross-bar, 10, having an aperture at its center so it can pass over the shaft, 1, and nut, 13, while moving lugs, 18. As shown in Fig. 1, the described arrangement of lever and links is intended for each end of the cross-bar, 10. Fixed to i the tank-supporting beams, 22, is a tripping device, 20, having an inclined or cam-surface, 20, which is so placed as to engage the outer end of the arm, 19, of the lever, 17

whereby the latter in passing over the incline 20, will throw the links, 16 and lever, 17 out of the dead center position as indicated by dotted lines in Fig. 3, and full lines in Fig. 2.

The mechanical means shown for actuating the cross-bar, 10, and the resultant link-and-toggle locking means comprise the transmission cables, 21, passing over the motor-propelled drums, 23, at the rear of the tank-carrying beams, 22, and over the sheaves, 24, at the front end of these beams. The cables are fastened to the cross-bar, 10, by means of lugs,25, and are made adjustable by means of turnbuckles or other adjusting devices, 26. The cross-bar, '10 is supported movably by wheels, 35, running on rails, 31.

The rear transmission drums, 23, are connected by a shaft, 27, which is propelled by any suitable motor mounted in a suitable gear casing, 28. Uusually I choose an air or electric motor for this purpose which in its turn is usually equipped with a valve,

' shift, or switch, so that the motor or driving mechanism can be reversed, by hand or automatically through the head, A, reaching its ultimate desired distance from the open end of the tank, A. The head, A, may be in this instance, connected similarly to the arrangement shown in the patents herein mentioned by means of beams 29 to wheels running on tracks inside of the tank, A, and

thehead, A, itself carries a corresponding frontset'of wheels, 30, running on outer tracks, 31. head and its rigid carriage being removed at any desired distance from the tank, From the foregoing description, it. will be seen that when the head is closed and This arran ement )ermits the from the motor, tends to pull the movable cross-bar, 10,. outward from the tank head,

A, thus unfolding the links, 8 and 9 (as indicated by dotted position Fig. 1) and pulling the links, .16 and 17, into the straight dead-center position shown in Fig. 3. This unfolding of the links, 8 and 9, results at the same time in pulling the collar, 2, with the lever ends of the locking arms, 3, along the shaft, 1, thereby causing the levers, 3, to slidably fulcrum on the lugs or bearings, 4, and thereby loosen the U-bolts,

a, and unlock the head so that the withdrawn ends of levers, 3, will clear the U-bolts, thus permitting the further linear motion of the cables, 21, to pull the head, A, and its carriage from the tank. This will happen as soon as the cross-bar, 10, has reached its ultimate outward travel relative to the head, A, by the links, 16 and 17 being moved into the straight, dead-center position, shown in Fig. 3. Thus the same linear motion that has caused the cross-bar '3, because the toggles of links, 16 and 17.

being in dead-center do not permit the crossbar to move nearer the head, A, until the dead-center position is disturbed. This hapens automatically as soon as' the head, A, 1s sufficiently near the tank, A, when the arm, 19, 'of the link, 17, (Fig. 3) comes in contact with the tripping device, 20, whereby the return motion of the carriage forces. the end of the arm, 19, up the cam or incline, 20, thus breaking the dead-center position, so that the head first comes in contact with the ring, 14, of the tank, A, and the linear motion of the cables, 21, pulls the cross-bar, 10, nearer the head thus again actuating the "toggles of links, 16 and 17, to cause them to assume the position dotted in Fig. 3, and shown in fulllines in Figs. 1 and 2, and firmly locking the head in place. As soon as the links, 7 and 9, have assumed dead-center position shown in full lines in Fig. l, the-links, 8, are at right-angles to them as dotted in Fig. 1, behind the'crossbar, 10, and the locking is complete and the motor is now cut-out-by hand or eitherautomatically cut out by mechanism refusing to move any farther or by any properly adjusted lug on cables, 21, striking or coming in contact with a cut-out.

It is not essential that the cross-bar. actuated toggle-levers, 7, 8 and 9, should be arranged to operate as before described, nor

do I limit my invention thereto for said invention is of broader scope than any mere arrangement of parts and it comprehends and includes any mechanism in combination with the head and traveling carrier and operated in, conjunction with the carrier and through the motion that tends to move the head and carrier away from or toward the tank, and is designed for automatically unlocking the head, moving same from tank, returning same to tank, and again locking same in position. Accordingly, in Figs. 4 and 5, I show another and more simple form of mechanism for the purposes stated. In this .modified construction, the locking levers, 3, and movable collar, 2, are actuated to moveqalong the projecting shaft through the arrangement substantially as disclosed in Patent No. 1,015,961, before mentioned. The shaft, H, moving the cranks, G G, which in their turn move the toggle links, F F, thus actuating the locking mechanism, is made to partially rotate by passing the cables, 21, around the cable drums, 32, attached to the shaft, H. In

placeof the link-mechanism, 16 and 17, in-

Fig. 3, the escape catch, 33, is attached to a bearing X, and engages a disk, M, fastened rigidly to the shaft, H. .The catch, 33, is pivoted at 34, and it is clear that when the same is released from the notch in the disk, M, the latter is free to turn. It will be seen that upon moving the head and its carrier toward the tank through the cables being actuated by the motor device already described that the shaft, H, cannot turn in its bearing until the escape catch, 33, is released. This automatically takes place when the lower end of the catch, 33 strikes the cam tripping device, 20, already described in the previous arrangement. Through this action, the head, A, comes in contact with ring, 14, at the same time the catch, 33, is released through coming in' contact with the tripping device, .20. As soon as the motion of the head, A, is arrested by the ring, 14 "the linear motion of the cables of lugs, 25, saidcross bar being attached to passing around the drums, 32, causes the mechanism are in an unlocked position without actuating .the locking mechanism. In this case the lower cable, 21, can be supplied with a lug or trip that comes in contact with a motor switch, thus reversing the motor at any moment desired and causing the carrier and head .to move to and from the tank at will.

In Figs. 6 and 7 I illustratean automatic I carriage control mechanism which will be found useful in connection with the salient parts of my invention. J

In this instance, the-transmission cable, 21, is connected to the cross bar, 10, by means the head, A, by links, substantially as heretofore explained' The transmission cable extends from the lug, 25, over the sheave, 24, at the front end of beams, 22, and returns below the track, 31, and extends over the motor propelled drums, 23 and thence extends to a lug, 25, on the cross bar, 10, thus making a complete circuit. At any suitable place on this cable, 21, a lug, 36, is securely fastened, said lug being so constructed that it will engage and pass through suitable stops. 46, at the will of the operator, and. which stops are securely fastened to the shaft, 44, at any desired distance apart to 1 5 thereby regulate the travel of the carriage.

A hand wheel, 43, fixedly secured to the shaft, 42, is designed to operate a lever, 39, which in turn rotates the shaft, 44, in either 7 direction, said lever, 39, being attached to a 11 0 boss. 40, which in turn is keyed to the shaft,

42. By pressing down on the shaft, 42, the lever, 39, rotates the shaft, and thus operates the stop, 46. p

.In Fig. 7 the operating mechanism is shown by full lines in its neutral position,

'2'. e. the position in which the motor is stopped. Suitable coui'iteiwveights, 47, of sufficient weight are employed to throw the stop, 46, to the right and keep it in such po- 12 0 to allow the shortening of the stroke of the would have to be pressed down by the op- V &

move, which in turn moves cross bar, 10

to 10 without moving the head. As the cable continues to travel, the head which is connected to said cross bar by links, 16 and 17. is moved from A to A While the head is moving from A to A the lug,

36, has moved from 36 to 36 and during this movement of the lug, the shaft, 42,

erator in order to allow the lug, 36,.to pass through the first stop, 46. Otherwise, lug, 36 would engage stop, 46, at position shown by lug at 36 andwould have pushed stop, 46, to position, 46 thus forcing lever, 49, to

position, 49 and operating the four-way valve, 50, causing same to reverse the motor.

After the lug, 36 has passed through the first 'stop,46, the operator releases shaft, 42, and the counterweights, 47, bring it back to its operating position, as shown by dotted lines in Fig. 7 In this position, the lug, 36, will encounter the second stop, 46, and push it to 46 The linear motion of shaft, 44, operates the four-way valve, 50, which reverses the motor, causing the lug, 36, and the cross bar, 10 to return to their original positions, 10 When the cross bar 10, reaches the position, 10 the lug, 36, encounters the first stop, 46, pushing it to 46 and again reversing the motor, cross bar, 10, together with the head, A and carriage would move backward and forward between certain limits whichare determined by the distance a art of the stops, 46. This motion backwar and forward of the carriage will continue until the operator wishes to close the press or stop the carriage at the limit of its travel from the vpress. In that case, the operator presses down the shaft, 42, thus bringing the large opening in the stop, 46, in line with the cable, 21, so as to allow the passage of the lug, 36, to its original position. The motion of the head and carriage can. be con trolled by the operator by operating wheel, 43, in the following manner: By bringing the hub, 40, on shaft, 42, in a neutral position, he can stop the motor; by turning wheel, 43, to the right he can close the press; or by turning it to the left he can open the press. When thelug, 36, is once admitted between stops, 46., it will continue automatically to cause the carriageto reciprocate by operating automatically the four-Way valve, 50, by engaging stops, 46.

The foregoing is descriptive of one method of automatically operating and con- In this manner the '7 trolling thetravel ofthe carriage between certainlimits. I do not, however, confine myself to the use of this specific mechanism as the salient features of my invention may be used in connection with other and different forms of controlling mechanism without departing. from the spirit of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. In an apparatus of the character described, the combination with a tank or receptacle having an openend and a carrier movable to and from. the tank and provided with a head adapted to close the open end of the tank or receptacle,'and locking mechanism between the head and the tank or receptacle, of an automatic mechanism connected to and actuating the locking mechanism, said automatic mechanism adapted to move the head and carrier away from or toward the tank or receptacle in a 'plane parallel to the longitudinal axis of the tank. a

2. In an apparatus, of the character described, the combination with a tank, or reoeptacle, a removable head 'forming a closure therefor, said head having a shaft pro jecting outwardly from its center, a collar slidable on said shaft, and locking levers carried by the collar and having outer ends engageable with the tank to lock the head to the tank, of a toggle mechanism for actuating said locking levers, said toggle mechanism including a movable cross-bar and connected links, means for tripping the toggle mechanismwand transmission means connected to the cross bar for moving the head to and from the tank or receptacle.

sleeve slidably mounted on the shaft, and

radially-disposed levers having inner ends pivoted to the sleeve and having outer ends adapted to engagefixed parts of the tank, an intermediate portion of said levers fulcruming against the head, of a secondsleeve orv collar concentric with saidshaft and separated from the first-named sleeve, a double series of toggle-levers between the two sleeves, other toggle-levers carried by the double series of toggle levers and a movable cross-bar to which they are in turn connected, said cross bar being slidably supported and in its turn being connected to the movable tank head by means. of' toggle-joints which, when in a dead-center line, will permit the movement ofthe crossbar to move the head without actuating the "'f k hg imam which when put out of dead-center position will permit the-crossbar to actuate the locking levers without moving the head.

4. In an apparatus of the character described, the combination with a tank or receptacle having an open end and a carrier operable to and from the tank or receptacle and having a head at one end adapted .to form a closure for theopen end of the tank or receptacle, a shaftprojecting centrally from the head, a sleeve slidably mounted on the shaft, and radially-disposed levers having inner ends pivoted to the sleeve and having outer ends adapted to engage ,a fixed part of the tank or receptacle, an intermediate portion of said levers fulcruming against the head, of a second sleeve or collar con centric with said shaft and separated from the first-named sleeve, a double series of toggle-levers between the two sleeves, other'tog-- gle-levers carried by the double series oftoggle-levers and a movable cross-bar to which they are in turn 'connected,'said crossbar being slidably supported and in' its turn scribed, the combination with a tank or receptacle having an open end and a carrier operable to or from the tank or receptacle having a head at one end adapted to close the open end of thetank or receptacle, a shaft projecting centrally from the head, a sleeve slidably mounted on the shaft, and radially-disposed levers having inner ends pivoted to the sleeve and having outer ends adapted to engage a fixed part of the tank, an intermediate portion of said levers fulcruming against the head, of a second sleeve or collar concentric with said shaft and separated from the first-named sleeve, a

double series of toggle-levers between'thetwo sleeves, other toggle levers carried by the double series of toggle-levers and a'm'ovable cross-bar to which they are in turn connected, said cross-bar being slidably supported, a toggle-lever connecting the crossbar to the movable head, said last-named toggle-levers having tripping arms whereby said levers when in dead-center line will permitthe movement of the cross-bar to .move

' the head and carrier to and from the tank or' receptacle at will without-actuating'the locking levers, a tripping device, and means for I 10. In apparatus of the character debringing the tripping arms in contact with the head. 7

said tripping device so that the toggles can be automatically thrown out of dead-center position to permit the cross-bar to actuate the locking levers without moving the head, a transmlssion means, and means for con- 'nectingsaid cross-bar to the transmission means. p

6. In apparatus of the character described, the combination with a tank or receptacle having an open end and a carrier adapted for movement in and out of the same, and provided with a head adapted to close the open'end of the tank, of a locking mechanism between the head and the tank, a prime mover and connections controlled thereby for releasing the locking mechanism, and means actuated by said prime mover for imparting movement to the head'parallel to the longitudinal axis of the tank coordinately with the release of the locking mechanlsm.

7. In apparatus of the character described,

the combination with a tank, or"receptac1e,

having an open end and a carrier adaptedfor movement in and out of the same and" provided with a head adapted to close the open end of the tank, 'of a locking mechanism between the head and the tank, means for releasing the locking mechanism, and

means actuated by the releasing means for movin the head relatively to the tank, and 1n a irection axis thereof.

8. In apparatus of the character described,

the comblnation with a tank or receptacle,

parallel to the longitudinal having an open end, and a carrier adapted for movement in and out of the same having a head adapted to close the openve'nd of: the tank, of a locking mechanism between the head and the tank, a toggle-mechanism for unlocking said head, a linearly-operating mechanism for actuating the togglemechanism, and a second toggle-mechanism between the first toggle-mechanism and the linearly-operating mechanism and actuated by the latter to impart linear movement to 9. In apparatus of the character described having a tank or receptacle, a removable head forming aclosure for one end thereof a transmission means, connections between the transmission means and said locking "and a locking mechanism for ,said head,

scribed, having a tank or receptacle, a. removable head forming a closure for one end thereof and a locking mechanism for said head, a transmission means, connections between the transmission means and said locking mechanism for initially actuating the latter to release the'head, and other connections between the transmission means and said head for imparting a linear movement to the unlocked head, said last-named means including a cross-bar and toggle-levers connected thereto and to the head and adapted when the joints thereof are out of deadcenter position to permit the cross bar to actuate the head locking mechanism without moving the head. I

11. In apparatus of the character described, the combination of a shell or casing tant point in advance thereof, a transverse connection between the saidcables,

each of said cables being attached to the head, and head locking devices between the head and said transverse connection.

In testimony whereof I afiix my signature in presence of two witnesses.

JASPER A. MoCASKELL.

Witnesses:

HARRY E. CORSER, R. M. Lows.

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