US1656730A

US1656730A - Delay valve

Info

Publication number: US1656730A
Application number: US439511A
Authority: US
Inventors: John C Hanna
Original assignee: HANNA ENGINEERING WORKS
Current assignee: HANNA ENGINEERING WORKS
Priority date: 1921-01-24
Filing date: 1921-01-24
Publication date: 1928-01-17
Anticipated expiration: 1945-01-17

Description

Jan. 17, 1928.

J. C. HANNA DELAY VALVE Filed Jan. 24. 1921 3 Sheets-Sheet l ,AHH/enfer' l f Harina .15g 2f Jan. 17, 1928.

J. C. HANNA DELAY VALVE Filed Jan. 24. 1921 3 Sheets-Sheet 2 Jan. 17, 1928.

J. C. HANNA DELAY VALVE Filed Jap. 24. 1921 3 Sheets-Sheet 3 lwe 71127" LOUL Halma of the operator.

Patented Jan.'l7, 1928.

UNITED STATES V1,656,730 PATENT OFFICE.

JOHN C. HANNA, OF CHICAGO, ILLINOIS, ASSIGNOR TO HANNA ENGINEERING WORKS, F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DELAY VALVE.

Application led January 24,1921. Serial No. 439,611.

This invention relates to delay valves, and has for its object to provide a delay valve which is es )ecially adapted, for use with riveting mechanism. In riveting, especially under the stimulus of production records, riveting is frequently done in a slip-shed manner, so that calking of the rivet plates is frequently necessitated. By the use of my improved dwell valve the haste of the operator of the riveter will not interfere with the proper riveting, since the valve functions to maintain the riveting dies in actuation with full pressure upon the rivet for a sriflicient period of time to ensure setting of the same. In a hasty operation, especially where the operators a1'e.woi'king on a piece-work basis, they are accustomed to operate the riveting dies as rapidly as possible, without allowing sullicient time for setting of the rivets atthe end of each riveting stroke, and, as stated, my delay valve ensures such action, regardless of the haste My combination also while delaying return of the riveting dies until a desired period of time has elapsed, will permit manual reversal of the control valve and thereby of the riveting die before the pressure has built up in the delay valve, that is, before the encountering of an appreciable resistance by the riveting dies or before the j traverse of the greater proportion of travel of the operating iston. 4This permits manual reversal of tie riveting die should the work become disaligned or should any one be caught in the mechanism, A

Another object consists in the construction fof the associated mechanism, which is sub- 4stantially such as to hinder any vattem J't to l interfere with the 'functioning of the well f valve.

These and other objects will be more fully lset` forth and describedv inthe following *specification and shown in the accompanyfing drawings, in which l Figure 1 is a. side elevation of a Hanna ltype of riveter, showing thel delay valve applied thereto, a. portion of, the mechanism being shown ln section, for clearness. y Fig. 2 is a side elevation of the valve and loperating handle, a portion of the riveting cylinder valve mechanism being shown in lsection, and the operating handle having ,been moved to riveting position4 to admit operating fluid for the riveting stroke.

Fig. 3 is a similar view, showing the operating handle after movement to the opposite position, the delay valve functioning to delayactuation of the riveter valve;

Fig. 4 is a view similar to Fig. 3, after the delay valve has functioned to operate the riveter valve;

Fig; 5- is a detail cross section, taken on the line 5 5 of Fig, 2;

Fig. `6 is a similar view, taken on the line 66 of Fig. 3;

7 is a vertical section, the 4well valve, showing the same drawn to an enlarged scale;

Fig. 8-is a side elevation of the dela valve, showing a guard ap lied thereto; an

'Fig. 9 'is an en elevation of the structure' shown in Fig. 8.

Like numerals refer to like elements throughout the drawings, in which- 10 designates generally a. riveter frame Supported or suspended by trunnions 10 and hangers 10". In the upper stake 10e of the riveter is the reciprocating plunger 11 carrying an adjustable die 12, which eoacts with the fixed die 13 earriedlby the stake of the riveter frame. riveter frame is the cylinder 15, in which is reciprocably mounted a piston 16, to which is pivotally connected the connecting rod 17, pivotally attached at its other end to rocker arms 18. A radius arm 19 is pivoted to theriveter frame at 19, and to the rocker arms at 18, the latter being eccentrically trunnioned between toggle links 20, which are, in turn, pivotally mounted between up standing.' osts 10 'of the riveter frame 10. A toggle ink 21 is pivotally attached to the movable rocker arm at one end and to the plunger at the4 other "end, all of this construction being conventional with respect to this type of riveter. It will be obvious that when the piston 16 moves to the left, 4as viewed in Fi 1, or toward the front end of the cylner 15, a. riveting stroke will ensue.

Duets 16 and 16h lead from the valve ehest25 to the rear and front ends of the cylinder 15, respectively. Operating fluid, such as air or steam, is pumped under pressure from any suitable source through the pipe 2G to the interior of the valve chest. A slide valve 27 is slidably mounted therein and adjapent the cylinder surface 16 is provided with a recess 27. An exhaust ort 16d leads from the interior of the valve e lest taken through- Carried upon theto any desired outlet point. The recess 27l is of such dimension as to permit the throwing of either of ducts 16 or 16 int-o coinmunication with the exhaust port 16d. The duct 16b is bifurcated, as shown in Fig. 1, to ensure flow of actuating fluid to the front of the cylinder when the piston is at the limit of the riveting stroke. The slide valve 27 is of such size that when at one limit of its travel-as shown in Fig. 2, for example the duct 16a will Vbe uncovered to 'permit flow of operating fluid :froml the interior of the valve chest 25 to duct 16, While when at the other extremity of its travel, as shown in Fig. 4, for example,`it will substantially uncover duct 16b to permit flow of operating fluid from the valve chest to the front of the cylinder 'for the return strol of the piston 16. It will be understood that when the slide valve 27 has been just moved to the position shown in Fig. 2, the piston is presumably in the position shown in Fig. 1, and actuating fluid will flow through duct 16 to advance the piston to actuate the riveting mechanism, this `being the riveting stroke. The exhaust port 16d is in communication with the duct 16", which permits exhaust of air or operating fluid from the front of the piston. i

The slide valve 27 is engaged by an oscillatable finger 30, secured to a rotatable shaft 31, to rotate therewith. A main operating handle 35 is rotatable about the axis of the shaft 3l relative to the latter.

The delay valve cylinder 37 has an inlet port 37a through the rear cylinder head 37b. A duct 39 leads to the port 37. from the main source 'of operatin fluid, arshut-off valve 39a being provide for closure when the apparatus is not in use. At the front endof the delay valve cylinder 37. is provided an inlet ort 37 through the front cylinder head 3 d, a pipe 38 lead'in therefrom to the cylinder port 1 6, whic is 1ocated in advance of the piston 16 when the latter is at its rearward limit of travel. Prokjlecting into the dela valve cylinder 37 in t e cylinder head 37" 1s the post 37, having a. plurality of apertures 37t and a second set of apertures 37E-see Fig. 7. A slidable collar 40 is reciprocably mounted upon the post 37e and is provided with a set of apertures 40, which may be alined with apertures 37 f, and an enlarged recess 40 at its open end, which may be alined with apertures 375. At its extremity the sleeve 4() is provided with a flan e 40.

Slidably mounted in the c linder 37 is the piston 41, having a rearward v extending rod 42 extending through the cylinder head 37". This piston is chambered at 41 to reciprocate upon the sleeve 40, and is provided with an inwardl projecting flange 41h engageahle with t e flange 40c of the collar. A bleed duct 37 leads from the interior of the cylinder 37 at its front end, the passa e of air or the like through the bleed uct eing restricted by the adjustable needle valve 43.

The cylinder 37 is provided with a trun-` nion 37", upon which is pivotally mounted the operating handle 35-see Figs. 2 and 5, for examplethe operating handle being maintained in position b a ca screw 46. The piston rod 42 is provided with a nut 43 at its extremity, and a collar 47 is slidably mounted on such rod exteriorly of the cylinder 37. This collar, is provided with a threaded boss 47, which extends through an aperture at one end of the link 50, which, at its other end is keyed to the shaft 31 by a key 501. A nut 47b prevents displacement of the link 50 from the boss 47, which is rotatable with respect to the link. The latter` is offset` as shown in Fig. 6, for example.

In the actuation of the mechanism de-. scribed, assuming the piston 16 to be in the` position illustrated in Fig. 1 and the slidel valve 27 to have been just moved to the posi-E tion shown in Fig. 2, operating fluid will flow through duct 16'i to the interior of cylinder 15, and the piston 16 will be moved outwardly Ion its riveting stroke. The movement of the operating handle 35 to the ri lit to the position shown in Fi 2, has resu te in the movement of eylin er 37 by virtue` of the trunnion 37", the cylinder serving to move the link 5() also to the right, thereby positively inovinor the slide valve 27 to the left, to the position shown in Fig. 2. The operating fluid under full line pressure being constantly admitted at the rear end of piston 41the latter will be moved to the front of cylinder 37, or to the left, as viewed in Fig. 7, this movement positively moving the sleeve 40 to the position `shown in Fig. 7, thereby opening ports 37' and 37. During the initial operation of the riveting stroke of the piston 16, the resistanceis comparatively small after inertia has been overcome, and port 16 is passed by the piston` Port 16' is so located as not to be passed lby piston 16 until inertia. of the moving parts is overcome and the consequent initial fluid pressure peak has subsided to its minimum. As the resistance increases pressure in the riveting cylinder will build up, and this pressure will be transmitted through the duct 38 to inlet port 37 of the delay valve cylinder 37 and through ports 40a to the front of the cylinder 37, and then through ports 40 to the interior 0f iston 41, so that suoli pressure will be e ective upon the maximum cross sectionaharea of the piston. As soon as the pressure in the front of cylinder 37 builds up sufficiently to exert upon the front piston 41 a total force greater than that exerted upon the rear effective area of the piston, the latter will he moved to the right, during the last of which movement. it will engage sleeve 40 and move the same into position closing ports 37' and 37g. Assuming the riveting dies to have reached the limit of the riveting stroke, the operator will throw the operating handle to the position shown in Fig. 3, this movement being limited by a suitable stop, such as the chain 35, extending between and secured to the cylinder 15 and handle 35. This movement will move the cylinder 37 to the left. Owing to the extension of the rod 42, however, this motion will be relative to the link 50, which will remain stationary, as will shaft 31 and finger 30, thereby ensuring that the slide valve 2T will not move. The built-up pressure in the front of the cylinder 37 is gradually reduced, owing to the leakage of the operating fluid through the bleed duct 37', this leakage being regulable on adjustment of the leakage valve 43. As soon as this falls below a certain pressure, the line pressure acting upon the rear piston 41 will operate to move the same to the left, as shown in Figs. 4 and 7, whereby the link 50 will also be moved and the shaft 31 rotated to move the slide valve 27 to the position shown in Fig. 4.

By this mechanism, after the operator has initiated the riveting stroke to the point where the piston 41 is moved to the front of the cylinder 37, which movement occurs before the completion of the riveting stroke, he is unable to reverse the valve 27, and thereby the piston 16, until a desired interval of time has elapsed, thereby ensuring the proper setting of the rivets. Ihis period of time, as will be obvious, can be varied according to the conditions met with by adjustment of the needle valve 43. It will also be apparent that full pressure is maintained in cylinder 15 until thedelay valve functions to reverse the slide valve, thus ensuring full pressure on the rivet during the setting thereof.

W ile the delay valve will function to revent too quick return of the riveting dies, it will permit manual reversal prior to the time that pressure has built up in pipe 38 due to appreciable resistance to further movement of the piston 16; in other words, while port 16 ma be uncovered by the main piston 16 and the sleeve valve 40 in position to open ports 37 and 37g, the pressure in pipe 38 will not built up sutiiciently to overcome pressure on piston 41 from the main Huid pressure line until movement of the main piston 16 is halted or resisted. This feature is desirable in that it permits quick reversal of the riveting die should the work being riveted become misplaced or disaligned, or should a workman be caught by the die or other mechanism. i

To prevent interferencewith the function of the delay valve, I have illustrated in Figs. 8 and 9 a structure wherein the cylinder head 37 is provided with an integral, non-circular portion 37X, apcrtured to permit extension therethrough of the piston rod 42, and from this extends the cui-vcd shield 37y surrounding the collar 47. The arm 50 is provided with an angularly disposed portion 5()d lying adjacent the shield 37. In this construction I may replace the nut 47", shown in Fig. 6, with a collar 47d secured to the boss 47a by apin 47e, or the like. The shield and arm portion 50 prevent jamming or other interference with the piston rod 42.

While I have shown and described one embodiment of my invention, it will be obvious that the same is susceptible of numerous modications and im rovements, and I do not wish to be restricted to the forni shown, except as defined in the appended claims.

I claim 1. In combination, a reciprocable die member, means to reciprocate said die meinber, means to control the riveting and return movement of said die reciprocating means, and operating mechanism to control the actuation of said controlling means, said mechanism comprising an operating member movable from riveting position to return position and vice versa, and means coacting with said operating member and said controlling means to maintain said die member in riveting position under pressure for a period of time after movement of said operating member to return position to insure4 the setting of a rivet or the like.

2. In combination, a cylinder, a piston reciprocable therein, ducts leading to said cylinder, a valve to control flow through said ducts, means to actuate said valve, an operating handle, and a delay member operatively inserted between said handle and said actuating means, said delay member being actuatable by fluid pressure to disengage temporarily said operating handle from said actuating means.

3. In combination, a cylinder, a piston reciprocable therein, ducts leading to said cylinder, a valve to control How through said ducts, means to actuate said valve, said means comprising a rotatable shaft, an operating handle rototably mounted on said shaft, an arm secured to said shaft, and means operatively attached to said handle and to said arm, said last-named means being actuatable b fluid pressure to disengage temporarily sai operating handle from said actuating means.

4. In combination, a cylinder, a piston reciprocable therein, a controlling valve for said;` cylinder, an actuating fluid supply, an operating member, a delay member operatively attached to said operating member and said controlling valve, said delay meinber comprising Aa cylinder and a. piston,

lill

means to convey actuating fluid from said supply to said delay cylinder at one end thereof, and means to convey actuating fluid from said first-named cylinder to the other end of said delay cylinder.

5. In combination, a cylinder, a piston reciprocable therein, a controlling valve for said cylinder, an actuating fluid supply, an operating member, a delay member operatively attached to said operating member and said controlling valve, said delay mem ber comprising a cylinder and a. piston, means to convey actuating fluid from said supply to said delay cylinder at one end thereof, and means to convey actuating fluid from said first-named cylinder to the other end of said delay cylinder, and a valve meinbcr, said delay piston being constructed and arranged to act-nate said valve member.

(i. ln combination, a cylinder. a piston reciprocable therein, a controlling valve for said cylinder, an actuatingr fluid supply, an operating member, a delay member operatively attached to said operating member and said controlling valve, said delay member comprising a cylinder and a piston, means to convey actuating fluid from said supply to said delay cylinder at one end thereof, means to convey actuating fluid from said first-named cylinder to the other end of said delay cylinder, and a valve member operable to cut oil' flow to said delay cylinder from said main cylinder, said valve being movable by said delay piston.

7. In combination, a cylinder, a piston reciprocable therein, a controlling valve for said cylinder, an actuating fluid supply, an operating member, a delay member operatively attached to said operating member and said controlling valve, said delay member comprising a cylinder and a piston, means to convey actuating fluid from said supply to said delay cylinder at one end thereof, means to conve actuating fluid from said first-named cylinder to the other end of said delay cylinder, a valve member operable to cut ofl' flow to said delay cylinder from said main cylinder, said valve being movable by said delay piston, and means to permit gradual esca e of actuating fluid from one end of sai cylinder.

8. In combination, a cylinder, a piston reciprocable therein, a controlling valve for said cylinder, an actuating fluid supply, an operati-ng member, a delay member operatively attached to said operating member and said controlling valve, said delay member comprising a cylinder and a piston, means to convey actuating fluid from said supply to 'said delay cylinder at one end thereof, means to convey actuating fluid from said first-named c linder to the other end of said delay cylin er, a valve member operable to cut off flow to said delay c linder from said main cylinder, said va ve being movable by said delay piston, means to permit gradual escape of actuated fluid from one end of said cylinder, and means to regulate the rate of such escape.

9. In combination, a main cylinder, a iston reciprocable therein, an actuating uid supply, a valve to govern the flow of said fluid to said cylinder, a valve-actuating means, an operating member, a delay member operatively inserted between said actuating means and said operating member and comprising a cylinder and a piston reciprocable therein, and a rod extending outwardly of said cylinder and carried by said piston, being operatively attached to said valve-actuating means, said cylinder being operatively attached to said operating member.

l0. In combination` a main cylinder, a piston reciprocable therein, an actuating lluid supply, a valve to govern the flow of said fluid to said cylinder, a valve-actuating means, an operating member, a delay member operatively inserted between said actuating means and said operating member and comprising a cylinder and a piston reciprocable therein, and a rod extending out- Wardly of said cylinder and carried by said piston rod, being limitedly slidable with respect to and engageab'le with said valveactuating means, said cylinder being opertively attached to said operating member.

11. In combination, a main cylinder, a piston reciprocable therein, an actuating fluid supply, a valve to govern the flow of said fluid to said cylinder, a valve-actuating means, an operating member, a delay member operatively inserted between said actuating means and said operating member and comprising a cylinder and a piston recipro cable therein, and a rod extending outwardly of said cylinder and carried by said piston, being operatively attached to said valve-actuating means, said cylinder being pivotally attached to said operating member.

12. In combination, a maincylinder, a piston reciprocable therein, an actuating fluid supply, a valve to govern the flow of said fluid to said cylinder, a valve-actuating means, an operating member, a delay member operatively inserted between said actuating means and said operating member, and comprising a cylinder and a piston reciprocable therein, said piston being provided with a rod extending outwardly of said cylinder, said piston rod being provided with a limiting means and being slidably` attached to said valve-aetuating means between said limiting means and said cylinder. 13. In combination, a. main cylinder, a. piston reciprocable therein, an actuatin fluid supply, a valve to govern the flow o said fluid to said cylinder, a valve-actuating means, an operatingmember, a delay memlll) ber operatively inserted between said actuating means and said operating member* and comprising a cylinder and a piston reciprocable therein, a rod extending' outwardly of said cylinder, and a collar carried by said valve actuating means, said iston rod being slidable on said collar an provided wit i means to en age the same at one limit of its relative slidin movement.

14. In co uid su l a valve to vern the flow o said lluijdptii seid cylindergoa valveactuating means, an operating mem r, a delay membei' operatively inserted between said actuating means and said operating member and comprising a cylinder and a iston reciprocable therein, a rod extend ng outwardly of said cylinder, and a collar carried b said valve-actuating means, said iston ro being slidable in said collar an provided with means to en age the same at one limit of its relativesli in movement, said collar being ivoted to sai valve-actuating means.

15. ncombination, a main cylinder, a iston reciprocable therein, an actuating uid sup ly, a valve to govern the flow of said llui to said cylinder a valve-actuating means, an operating member, a delay member operatively inserted between said actuating means and said operating member and in v comprising a cylinder and a piston reciprocable therein, e rod extendin outwardly of said cylinder, a collar carrie by saidvalveactuating means, said piston rod being slidable in said collar and provided with means to engae the same at one limit of its relative sli ing movement, and a uard surrounding said piston rod and col ar.

16. In combination, a mam cylinder and piston, a valve, an actuatingmeans; therefor comprising an arm and an operatin member, a de ay member operatively inserted between said operating member and said arm, said delay member com rising a cylinder and a iston reciproca e therein and having a piston rod extending outwardl thereof said arm havin a rtion lying a jacent the path of trav o said piston rod, and alguard surrounding said piston rod.

17. n combination, a main cylinder and piston, a valve, an actuating means therefor comprisn an arm and an operatin mem bei', a de ay member operatively inserted between said operating member and said arm, said delay member comprising a cylinder and a iston reciprocable therein and having a piston rod extending outward] thereof, said arm having a Portion lying a jacent the path of travel o said piston rod, and a guard surrounding said piston rod, said guard having its extremities lying adjacent said portion of said arm.

18. In combination with a die, a fluid pressure actuated means to move said die into ination, a main cylinder, a d iston reciprocable therein, an actuatin f and out of rivetn position, a valve to control admission an exhaust of lluid pressure to and from said means, an operatin member operable to effect movement of sai valve to either rivetin or return position, and means to dela e movement of said valve to return position. after movement of said operating member to correspcndi position to insure setting of a rivet or the li ce by said 19. In combination with a die, a fluid pressure actuated means to move said die into and out of rivet' ition, a valve to coutrol admission an exhaust of fluid pressure to and from said means, an operating member operable to el'ect movement of said valve to rivetin and return positions, and means to delay ie movement of said valve to return position after movement of said operating member to return osition said' delay means being actuatable ly duid pressure.

22. In mechanism of t 1e class described, in combination, a main cylinder a. piston reci roceblo therein, a source o premere flui a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve aetuatin member in operative enga ement with sai valve, and a delay mem r operativel inter sed between said operatmem r an said, actuating member, said delay member transmitting the movement of said operating member directly to said valve in one direction, and com rising means to reverse' the movement of sei valve a desired period of time after the reversal of said member.

21. In mechanism of the cla described, in combination, amaiii cylinder a piston reciirocable therein, a source of pressure liui a valve member operable to control. admission to and exhaust from said cylinder of pressure duid, an operating member, a valve actuatin member in operative enga ment with sa: valv and a delay mem er operativel inter osel between said operatin in em r and said actuating member, said delay member transmitting the movement of said operating member directly to said valve in one direction, and comprising means to reverse the movement of sai valve a desired period of time after the reversal of said o retin member, said delay meniber permitting immediate reversal of said valve upon reversal of said operating member during unresisted movement of said main piston.

22. In mechanism of the class described, in combination, a, main cylinder, a. piston reciirocable therein, a source of pressure flui a valve member bperable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve actuatin member in operative engagement with sai valve, and,a delay member l'lll lili lll)

lll

operatively interposed between said operating member anc said actuating member, said delaymember comprising a cylinder, a piston reciprocable therein and operably attached to said operatin member, means to su ly pressure fluid' om said source to sul cylinder at one end thereof, means to supply fessure duid from said main cylinder to t e other and of said delay cylinder.

23. In mechanism 'of the class described, in combination, a main cylinder, a piston reci rocable therein, a source of pressure fluid), a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve actuat-iu member in operative engagement with said valve, and a delay memer operatively interposed between said operating mem )er and said actuating member, said delay member comprising a cylinder, a piston reeiprocable therein and opg ably attached to said operating mem .r means to supply pressure fluid from sai( source to said cylinder at one end' thereof, means to supply pressure fluid from said main cylinder to the other end. of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylindei' to said delay cylinder.

24. In mechanism of the class described, u combination, a main cylinder, a piston reciprocable therein, a source of pressure fluid, a valve member operable to control admission to and exhaust from said cylinder of pressure Huid, an operating member, a valve actuatin member in operative engagement with said valve, and a delay member operatively interposed between said operating mein er and said actuating member, said delay member comprising a cylinder, a piston reciprocable therein and operably attached to said operating member, means to supply ressiire iluid from said source to said cylinder at. one end.v thereof; means'to supply ressure fluid from said main cylinder to t e other end of said delay cylinder, and a, valve controlling admissionof fluid pressure from said main cylinder to said delay cylinder, said last named valve being actuated by said Vdelay piston.

25. In mechanism of the class described, 1n combination, a main cylinder, a piston reci rocable therein, a source of pressure tlui a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a. valve actuating member in operative enagoment ivith said valve, and a delay memer operatively interposed between said operatin member and said actuating member, said clay member comprising a cylinder, a. piston reciprocable therein and operably attached to said operating member, means to supply rassure liiid from Asaid source to said cylin crat one end thereof, means to supply pressure fluid from said main cylinder to-the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylinder to said delay cylinder, said piston being operatively connected to said valve to positively move the same adjacent either limit of travel of said delay piston.

26. In mechanism of the class described, in combination, a main cylinder, a piston reci rocable therein, a source of pressure fluir, a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve actuating member in operative engagement with said valve and a delay member operatively interposed between said operatinfr member and said actuating member, said delay member comprising a cylinder, a piston reciprocable therein and operably attached to said operating member, means to supply pressure fluid Ptrom said source to said cylinder at one end thereof, means to supply pressure fluid from said main cyl inderto the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main4 cylinder to said delay cylinder, said delay cylinder being provided with an adjustable outlet adjacent the end to which the fluid pressure from said main cylinder is supplied.

In testimony whereof, I have subscribed my name.

JOHN C. HANNA.

operatively interposed between said operating member and said actuating member, said delaymember comprising a cylinder, a piston reciprocable therein and operably attached to said operating member', means to supply pressure fluid from said source to .said cylinder at one end thereof, means to supply pressure fluid from said main cylinder to the other end of said delay cylinder.

23. In mechanism of the class described, in combination` a main cylinder, a piston reciprocable therein, a source of pressure fluid, a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member,

a valve actuating;- member in operative engagement with said valve, and a delay member operatively interposed between said operating,r member and said actuating,r member, said delay member comprisingr a cylinder, a piston reciprocable therein and operably attached to said operating member, means to supply pressure Huid from said source to said cylinder at one end thereof, means to supply pressure fluid from said main cylinder to the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylinder to said delay cylinder.

24. In mechanism of the class described, in combination, a main cylinder, a piston reciprocable therein, a soulce of pressure fluid, a valve member operable to control admission to and exhaust from said cylinr der of pressure fluid, an operating member,

a valve actuating member in operative engagement with said valve, and a delay member operatively interposed between said operating member and said actuating member, said delay member comprising a cylinder, a piston reciprocable therein and operably attached to said operating member, means to supply pressure fluid from said source to said cylinder at one end thereof, means to supply pressure fluid from said main cylin` der to the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylinder to said delay cylinder, said last named valve being actuated by said delay piston.

25. In mechanism of the class described, in combination, a main cylinder, a piston reciprocable therein, a source of pressure fluid, a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve actuating member in operative engagement with said valve, and a delay member operatively interposed between said operating member and said actuating member, said delay member comprising a cylinder, a piston reciprocable therein Vand operably attached to said operating member, means to supply pressure fluid from said source to said cylinder at one end thereof, means to supply pressure fluid from said main cylinder to the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylinder to said delay cylinder. said piston being operatively connected to said valve to positively move the same adjacent either limit of travel of said delay piston.

26. In mechanism of the class described, in combination, a main cylinder, a piston reciprocable therein, a source of pressure fluid, a valve member operable to control admission to and exhaust from said cylinder of pressure fluid, an operating member, a valve actuating member in operative engagement with said valve, and a delay member operatively interposed between said operating,r member and said actuating member, said delay member comprising a cylinder, a piston reciprocable therein and operably attached to said operating member, means to supply pressure lluid from said source to said cylinder at one end thereof, means to supply pressure fluid from said main cylinderto the other end of said delay cylinder, and a valve controlling admission of fluid pressure from said main cylinder to said delay cylinder, said delay cylinder being provided with an adjustable outlet adjacent the end to which the fluid pressure from said main cylinder is supplied.

In testimony whereof, I have subscribed my name.

JOHN C. HANNA.

CERTIFICATE 0F CORRECTION.

Potent No. l, 656, 730.

Granted January 17, 1928,F to

JoaN i c. HANNA.

It is hereby certified that `error appears in the print above numbered patent requiring correction as follows: claim numeral 1322" read 0"; and t Page 5, line.87, for

hat the said Letters Patent should he read with this correction therein that the same may conform to the record of thecase in the Patient Office.

Signed and sealed this 14'tl1da'y of February. A. D. 1928.

Seal.

M. I. Moore, Acting Commissioner of Patents.

Utl

ed specification of the CERTIFICATE 0F CORRECTION.

Patent No. 1,656,730. Granted January l, 1928, to

JOHN C. HANNA.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, line.87. for claim numeral 1 '22" read "20"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this l4th'd`ay of February, A. D. 1928.

M. J. Moore, Seal. Acting Commissioner of Patents.