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Ratchet mechanism

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Publication number
US1537717A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
ratchet
pin
pawl
screw
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Cornelis F M Van Berkel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US SLICING MACHINE CO
U S Slicing Machine Co Inc
Original Assignee
US SLICING MACHINE CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H31/00Other gearings with freewheeling members or other intermittently driving members
    • F16H31/001Mechanisms with freewheeling members
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/15Intermittent grip type mechanical movement
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2133Pawls and ratchets
    • Y10T74/2136Pivoted pawls
    • Y10T74/2137Single tooth

Description

Ma'y 12, 1925. 1,537,717

C. F. M. VAN BERKEL RATCHET MECHANISM Filed March .8, 1913 Patented May 12, 1925.

narran ortica. l,

CGRNELIS M. VAN BERKEL, OF ROTTERDAM, NETHERLANDS, ASSIGNOR 'IO U. S.

SLICING MACHINE COMIPANY, F LAI'ORTE. INDIANA.,l Av CORPORATION" OF IN-f DIANA..

RATCHET MECHANISM.

Application filed March 8, 1919.` Serial No.` 281,338.` Y

provision of mechanism of the character named which shall he of improved construction and operation. i 15 The invention is exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification. and it is more particularly pointed out in 4the appended claims. p

In the drawingy Fig. 1 is a fragmentary elevation "partly in section of one embodimentof the present' invention. y

Fig. 2 isa view looking from the right in Fig. 1. y

Fig. '3 is a view similar to Fig. 1, lout showing a slightly `modified form of the invention. j

Fig. 4 is asection on line 4:-4.- of Fig. 8; and

5 is a sectional detail of still another modification.

In slicing machines, and other mechanism, it is common to impart a slight periodic rotary movement to parts of the machine hy means of la pawl and ratchet device, and it is frequently desirable to re-set the part of the machine so rotated. The present invention provides mechanism for accomplishing this purpose. yThe form illustrated shows the construction as applied to a slicing machine of ordinary design in which the nu.- meral designates a meat carriage, which is usually mounted to slide on a fixed support represented fragmentarily at 11. The meat table 10 loy its reciprocationpresents the material which it carries to a slicing knife each time a slice is to he severed, and the table is provided with a slicing meat plate which is fed across the table 10 atl right angles to the direction of reciprocation of the table by means of a feed screw 12.

The feed screw 12 is journaled for rotation in a downwardly extending flangell of the meat table, and has a lever arm 14C loosely mounted on the nroiectingfportion 15 Iof the feed screw. Carried loy the portion 15 of the feed screw, just outside-of` the hearing of the lever arm 14, is a ratch'etwheel 16, which is engaged hv a pawl 17 pivotally mounted at l18 yon the lever arm -1-1. f The pawl 17 may he held in engagement with the teeth of thepratchet wheel 16 either hy gravity, or by means of al spring inthe usual manner. Ardyacent the outer face of the ratchet wheel 16 is a lcrank disc 19, which is rigid-ly secured to the end of thescrew 12 loyk a key 20. The crank disc 19 carries near its periphery a raised looss 21, which is bored to form an opening 22, through which a pin` v23 extends. The pin 23 is provided with a flangel 24, against which one end of a coil spring 25 hears. The other end of the coil spring 25 hears against the end wall 'of the opening 22, so that the end of the pin 23 is normally projected through the open end of the recess 22 into engagement with. the face of the ratchet wheel 16. A handle 26 isv rigidly secured to the end ofthe pin 23 opposite the ratchet so that the end lofthe handle hearsagainst the face of the boss 21 and limits the movement of the pin 23 under the influence of the coil spring 25. An opening 27 is provided in the face of the ratchet 16 forreceiving the end of the pin 23 to cause the ratchet 16 and the disc 19 to rotatein unison with one another. In this way' the screw 12 may. he made rigid with the ratchet 16, so that the screw may loe rotated loy the pawl which engages the teeth of the ratchet. The support 11 for the table 10 carries a pin 28 disposed in the path of movement of a downwardly projecting arm 29 of the lever 141. W'hen the table 10 approaches the limit of its reciprocation, the i arm 29 strikes the stop 28, thus rotating the lever 14 and causingthe pawl 17 toimv i part a slight rotationl to the ratchet 16. Since the ratchet is normally connected with the feed screw 12 through the disc 19 and.

the pin 23,' this rotation of the ratchet will screw into position for a `second slice. If at pawl in this any time it is desirable to adjust the feed screw 12 independently of the ratchet 16, it is only necessary for the operator to grasp the handle 26 and draw it outwardly a sum-v cient distance to free the end of the pin 23 from the opening 27. While the handle 26 is held in this position, the disc may be rotated in either direction independently of` the ratchet 16, and thus the screw 12 may be turned to effect any adjustment of the parts controlled thereby which may be desired.

In the for-m of the invention shown in Figs. 3 and 4, the ratchet wheel 16 is secured directly to the feed screw 12 by means of a key 30, and the disc 19 ofthe form previously described, is entirely omitted. A handle 31 is rigidly mounted directly on the faceof the ratchet wheel 16. The pawl 17 is carried by the lever arm 14 in position to mesh with the ratchet wheel 16 in the same way as inthe previouslydescribed form, but the pawl is provided, as shown more clearly in Fig. 4, with a spring-pressed pin 32, the pointed end 33 of which is arrangedfto engage a V-shaped projection 34 extending from the face of the lever 14. 1Nhcn the pawl 17 is in the position shown in full lines Vin Figs. 3 and 4, the pin 32 will hold the v i position out oflengagement with the teeth of the ratchet. lVhen the pawl is pressed downwardly, the spring-pressed pin 32 will move over the apex of the projection 34 and Lspring into engagement with the inclined face ofthe projection on the side adf vjacent the ratchet wheelv 16. The parts are `so related that the point 33 ofthe pin 32 will engage the lower face of the projection 34 during the upward movement of the pawl while passing over the points of the ratchet teeth.k It will be seen that this engagement between `the inclined face ofthe projection 34 and the point of the pin 32 will tend to press the pawl into engagement with the ratchet teeth, and the motion of the pawl is not suiiicient to carry the point of the pin past the apex of the projection at the time thatthe nose ofthe pawl vpasses over the point of a ratchet tooth. Inthis way the spring-pressed pin 32 cooperating with thejprojection 34 performs a double purpose of holding the pawln resiliently vin engagement with the ratchet teeth, and also of holding'the pawl out of engagement with the teeth when it has once been moved into its I. disengaged position. So long as the pawl remains in engagement with the teeth, reciproc'ation-of t-he lever 14 will serve to rotatethe ratchet wheel, and this rotation will be imparted to the feed screw.- When it is desired to adjust the screw independently of, the ratchet mechanism, the pawl 17 is lifted out of engagement with the ratchet teeth and automatically remains in this position until it is returned. llfhile it is thus held, the ratchet 16 and the feed screw 12 may be rotated any desired amount in either direction by means of the handle 31.

1n the form shown in F 5, a springpressed pin 35 is provided with a knob, by means of which it may be withdrawn from engagement with an opening 37 in the lever 14. The pin is normally held in engagement with the opening by a spring' 38, and it may be retained in its retracted position by a tooth 39 arranged to pass through a notch 40 in a flange 41 secured to the pin 35, and against which the vend of the spring 38 bears. When the lrnob 36 is pulled backwardly until the flange 41 engages the tooth 39, the knob maybe rotated to bring the notch 40 into registry'with the tooth, after which the pin may be further withdrawn until the flange 41 has passed behind the tooth. A slight rotation of the knob 36 while in this position will bring the notch 40 and tooth 39 out of registry. and thus retain the pin in its retracted position. In operation the. pin 35 is thus locked out of engagement with the lever 14- during the time that the ratchet wheel 16 is being driven by the pawl 17 and the lever. This will permit the pawl 17 to bear upon the periphery of the ratchet wheel 16 under the influence .of `gravity, or of a spring provided for the purpose, as the case may be. When it is desired to adjust the mechanism controlled by the screw 12, the pawl 17 may be raised out of engagement with the ratchet teeth and the pin 35releasedto engage the opening 37, and thus loclr the pawl in its inoperative position. While g the pawl is thus held, the ratchet wheel 16 may be rotated by rthe handle 31 `to adjust the feed screw.

vI claim:-

1. In combination, a feed screw, a ratchet wheel loosely mounted on said screw, a ,pawl for rotating said ratchet wheel, a hand crank rigidly connected `with said feed screw, said ratchet wheel being connectible with said feed screw to impart rotation to said yfeed screw, ya handle for rotating said hand crank, and means operable by said handle for making and breaking the connection between said ratchet mechanism and said feed screw. Y

,2. The combination with a rotary element, of a ratchet wheel revolublv mounted on said element, a hand-operated device fixed to said element for rotating the same, Ameans for rotating said ratchet wheel, andspring-actuated means on said hand-operated device for connecting said ratchet wheel and handoperated device to rotate said element from said ratchet wheel.

3. In combination, a revoluble element, a ratchet wheel rotatably mounted on said element, an oscillatory pawl for imparting perlodic movement`to said ratchet Wheel, a crank for withdrawing said pin from said hand crank fixed to said element for rotating ratchet lWheel and for rotating said hand the same, a spring-pressed pin on said hand Crank. 10 crank arrungad "w engage said ratchet wheel f In testlmony whereof I 113W@ Slgned 7 my to drive said element from said ratchet Wheel name t0 thls SPeClCtOn, 0n this 21st day 0 through said hand Crank, and a' common December: L D- 1918 handle connected with said pin and hand C, F, M, v, BERKEL,

US1537717A 1919-03-08 1919-03-08 Ratchet mechanism Expired - Lifetime US1537717A (en)

Priority Applications (1)

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US1537717A US1537717A (en) 1919-03-08 1919-03-08 Ratchet mechanism

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5320398A (en) * 1993-02-05 1994-06-14 Brian G Popp Tie-down mechanism for automobile trunk lid
US6644630B1 (en) * 2002-06-19 2003-11-11 Lorenz Manufacturing Company Brake mechanism for winch assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5320398A (en) * 1993-02-05 1994-06-14 Brian G Popp Tie-down mechanism for automobile trunk lid
US6644630B1 (en) * 2002-06-19 2003-11-11 Lorenz Manufacturing Company Brake mechanism for winch assembly

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