US2427992A

US2427992A - One revolution teip means

Info

Publication number: US2427992A
Authority: US
Publication date: 1947-09-23
Anticipated expiration: 1964-09-23

Description

Sept. 23, 1947. VB. KNAUER I 2,427,992

' ONE nsvownon TRIP mums Filed April 21, 1945 2 Sheets-Sheet 1 INVENTO a e/7&0 K kua' BY v ATTORNEY Se t. 23,1947. I B, KN ER-i 2.427;!)92

' ONE-REVOLUTION TRIP MEANS I Filed April 21, 1945- 2 Sheets-Sheet 2 INV NTOR v ATTORNEY Patented Sept. 23, i947 Berthold Knauer; East N orwalk, Conn assignor' to= Pitney-Bowes; I-nc., a corporationiofDelaie ware Application-April 21, 1945; Serial No. 589.;556

6 Claims.

Thisinvention relates to a one revolutioncontrol meehanis'm and is: particularly arranged forin: a crank: operated postage printing machine, wherein a postage-'- impression is-printed on mail mat'ter duringeach machinecycle of operationi As provided bythe present invention, a trip on stop' rele'ase-is adapted to be effected by a slight' reverse motion: ofi the crank handle; This produces-an improved-operation of the machine inthat: it preventsthe operator from-accelerating the crank unduly whenlprinting several successiveimpression's, a situation=which frequently oc-V curs inmachihes wheretripping is adapted to be effected-onithe'forward stroke of the crank.

It is the object of'tliis inventiontherefore to provide, in-a crank controlledpostage printing machine, means whereby-the tripping operation for each succeeding operation iseiiected by a slight reverse movement of the crank.

With the above and other objects in view, which will appear as the description proceeds, theinvention resides in the combination and arran'gement' of parts and in the details ofconstruction hereinafter described and claimed, itbeing understood that various-changes in the precise'embodime'ntof the invention hereindisclosed may be madewithih the scope" of what is claimed I without departing fromthe spirit of the invention.

A preferred embodiment of theinvention is illustrated in theaccompanying drawings, wherein;

Fig. 1'-is aside elevationalview of-a-one revolu tioIrcrank Operated machine, including a trip and :one revolution" control mechanism- Fig; 2 is a plan-view ofa portionofFigl 1, showing the-one revolution control-mechanism'on an enlarged scale,-- and is'takenin the direction of the arrow-20f Fig. l; V

Fig. 3=is an end-view; of the one revolution con-=- trol mechanism with part in section, and is taken along the-li-nes 3--'-3 '0f Fig; 1;

Fig; 4 is a viewsimilarto Fig. 3; with'the control mechanism shown in the initial reverse crank movementposition;

Fig. 5"is a1soa view similar-to Fig. -3,- withthe control mechanism shown in'stop release position as effected :by the i initial tforward i crank motion; and

Fig.- G-isanother-viewzsimilar to Fig, 3, with theacontrol ame'chanism :shownadurin'g a cycle ofrevolutiom Referring to the drawings in detail, the de- ViCe2 c0mprises-- a' -support 'l0 having-bearings- 2, I II-'I, within 'which-a crank shaft l2 is'adapted to rotate. A crank handle I3 is fixed to orie en d of-the-crank shaft l2 t o provide ameans for rotating said shaft' A spiral gear I4; freely mounted on said crank shaft, is adapted-tomesh with anotherspiral gear l6 -to providea drive for a main drive shaft l 5'. The drive between the crankshaft l'2 and the gear I4 is effected by means of a coupling collar ll, which collar is fixed to-the crankshaft l2 'by means of a pin 18,

and is coupled withthe-wornigear I4,- as at IS? The couplingconnection-comprises a tongue projection2 lon thecollar ll-{and'groove 22in a pro jecting' hub 23 -o f-the worm gear l4. Clearance is provided; asindicated'at 24, to effect "lost motion, for apurp'o-se to be later described.

The one-revolution control'for limiting-the rotationof' the-crank shaft, comprises a projection 25 one hub 26, which hub projects from the'worm gear I l-in a direction opposite to the hub 23. A

stop arm- 21a; on arocker memberzl, normally extendsinto the path of the projection 25- to thus obstruct movement'of the crank shaft 12 after each" revolution thereof, The rocker member 27 is fixed to a shaft 28,-which shaft is'ro-' tativelysupported-in a bearing-wprovided in the support-member H3; The rocker member 2Tfurtherincludes a second arm 29- extending sidewardly, which arm is adaptedto cooperate with acam portion 3| on the'hwb 26.

A rocker lever 32 is freely mounted onthe shaft 28 a'nd' has an upwardly'extendedarm33' anda downwardly extended arm 34. mounted on-the upwardly extended arm 33. To the rear of the rocker lever 321s another arm 36, which arm is pinned to the shaft 28at 36a'and has a pin 37 extending, from the lower end thereof. A-sp-ringiSBhasits coils surrounding hub portions39' and M extending from the rocker 1ever 32 and arm 36 respectively, and has its ends extending downwardly, with-one end 42 engaging a lip 43' projectingfrom the arm 34; and another downwardly projecting end i i-engaging a lip 45 projecting froirithear1n36i By means of saidspring, the arm 34 is urged against the lip 45'and both the lever 32-an'd arm 36 normally move as an integral unit but have sufiicient flexis bility to allow independent'movement of the rocker ever 32 whenthe crank'moves to its homeposition, as-in Fig. 3.

'The'stop' member 21 is normally locked in' its stop position through'the engagement of a stopshoulder portion' illon a stop plate ldwith-the pin 31- projec'ti'ng' from arm 36; The stop plate Mi-is pivotally mountedu'pon a stud 4-1 and has A roller is.

a downwardly projecting detent portion 48, which is normally engaged by a detent spring 49 to normally maintain the stop plate in a blocking position relative to the pin 31 projecting from the arm 36.

A trigger member 5| is pivotally mounted upon a pin 52, projecting from the face of the stop plate 46, and has a. trigger finger portion 53 normally projecting into the path of a lug 54 extending from a hub 50 pinned to the crank shaft. Said hub 50 forms a part of stop release cam 6!, to be later described. A spring 55, coiled around the pin 52, has one end looped over the trigger finger 53, and the opposite end bearing against a boss 56, extending from the stop plate 46. Another finger 51, projecting from the trigger memher 5!, normally bears against the boss 56 due to the pressure exerted by the spring 55, as indicated in Figs. 2, .3, 4, 5 and 6. .An upwardly extended portion 58, of the stop plate 46, normally lies in the path of a lug 59, also projectin from the boss 26.

A stop release cam 6|, fixed to the end of the crank shaft I2, has its cam surface bearing against the roller 35, on the rocker lever 32, and is adapted to effect rocking of the stop arm 21a from its stop position, after the crank has received a slight reverse motion from its normal home position.

In operation, the above-named mechanism functions in the following manner:

With the parts in their home position, as shown in Fig. 3, the cycle of operation is started by rotating the crank shaft in a clockwise or reverse direction, as viewed from Fig. 3. This will cause the lug 54 to engage the trigger finger 53 and effect rocking of the stop plate 46 about its pivot stud 41, as indicated in Fig. 4. The stop shoulder 40 on said stop plate 46 is thus removed from the path of the pin 31, and the detent 48 is removed from its detent position relative to the spring 49. Movement of the stop plate 46 is limited by the engagement of a projection 62 with an abutment 63, forming a part of a support ID. The restricted movement of said stop plate 46 also limits the reverse motion of the crank shaft [2.

Reverse motion of the crank shaft I2 is permitted without causing rotation of the main drive shaft l5, due to the lost motion connection provided by the tongue and groove 2| and 22, previously described.

The forward or operating motion of the crank shaft can now be effected in that the stop arm 21a is free to be rocked, as indicated in Fig. 5, when the cam 6! is rocked in a counter-clockwise direction, and the high point 64 of said cam engages the roller 35. Referring to Fig. 5, it will be seen that the stop has been removed from the path of the projection 25, which movement occurs during the take-up of the lost motion provided by the tongue and grooved portions 2| and 22. With the stop removed, the rotation of the crank shaft can now be made without interruption for one complete revolution.

Resetting operations are effected during the rotation of the shaft 12 as follows: The trigger portion is reset through the engagement of the lug 59 with the portion 58, projecting from the stop plate 46, and the stop arm 21a is positively returned to its home position by the engagement of cam 3| with the arm 29 of the rocker member 21. Therefore, after the crank shaft has moved through the complete revolution the pro-, jection 25 will again engagethe stop arm 21a andall other portions of the device will have been 4 reset to their normal positions, as shown in Fig. 3.

Having described the invention what is claimed is:

1. A one revolution control device, comprising, a hand crank shaft including a stop engaging member movable therewith, a shiftable stop element normally positioned in the path of the stop engaging member to obstruct movement when the crank shaft reaches its home position, blocking means obstructing movement of the stop element when the crank shaft is in its home position, means to permit limited reverse rotation of the crank shaft after the said crank shaft reaches said home position, and means operable during the reverse rotation of the crank shaft to remove the blocking means from a blocking "a hand crank shaft including a stop engaging member movable therewith, a shiftable stop element normally positioned in the path of the stop engaging member to obstruct movement when the crank shaft reaches its home position, blocking means obstructing movement of the stop element when the crank shaft is in its home position, a lost motion connection operable by the crank shaft drive to permit limited reverse rotation of the crank shaft after the said crank shaft reaches said home position, means operable during the reverse rotation of the crank shaft to remove the blocking means from a blocking position relative to the shiftable stop, and means operable on the forward movement of the crankshaft to effect movement of the stop ele-- ment out of the path of the projecting element.

3. A one revolution control device, comprising, a hand crank shaft including a stop engaging member movable therewith, a shiftable stop element normally positioned in the path of the stop engaging member to obstruct further movement when the crank shaft reaches its home position, blocking means obstructing movement of the stop element. when the crank shaft is in its home position, means to permit limited reverse rotation of the crank shaft after the said crank shaft reaches said home position, means operable during the reverse rotation of the crank shaft to remove the blocking means from a blocking position relative to the shiftable stop, and a cam element moved by the crank shaft on its forward motion and engageable with the shiftable stop element to move said stop element out of the path of the projecting element.

4. A one revolution control device, comprising, a rotative element, a hand crank drive for said rotative element, a movable stop normally urged into an obstructing position relative to said rotative element, a second stop normally set in a blocking position relative to the movable stop, means to permit slight reverse rotation of the hand crank drive when in a home position, and means connected with said drive and operable during reverse rotation to effect movement of the second named stop to a non-blocking position relative to the movable stop.

5. A one revolution control device, comprising, a rotative element, a hand crank drive for said rotative element, a movable stop normally urged into an obstructing position relative to said rotative element, a second stop normally set in a blocking position relative to the movable stop, means to permit slight reverse rotation of the hand crank drive when in a home position, means connected with said drive and operable during reverse rotation to effect movement of the second into an obstructing position relative to said rotal0 tive element, a second stop normally set in a blocking position relative to the movable stop, a

second rotative element connected with said drive,

a lost motion connection between the drive and first named rotative element to permit reverse movement of the drive without efiecting movement, of the first named rotative element, said second rotative element being adapted to effect movement of the second named stop to a nonblocking position relative to the movable stop, and means driven by the crank drive and operably associated with the movable stop to move said stop out of an obstructing position on the fol- 5 lowing movement of the crank in a forwardly direction.

BERTHOLD KNAUER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 5 Number Name Date 2,273,272 Knauer et al. Feb. 17, 1942 1,827,745 Hagemann Oct. 20, 1931 2,219,299 Dawson et al. Oct. 29, 1940 1,197,039 Krauth Sept. 5, 1916