US428681A - Mechanism for reversing motion and overcoming dead-centers - Google Patents
Mechanism for reversing motion and overcoming dead-centers Download PDFInfo
- Publication number
- US428681A US428681A US428681DA US428681A US 428681 A US428681 A US 428681A US 428681D A US428681D A US 428681DA US 428681 A US428681 A US 428681A
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- Prior art keywords
- lever
- centers
- motion
- rod
- dead
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- 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
Links
- 238000010276 construction Methods 0.000 description 2
- 230000000994 depressed Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
- F16H21/38—Crank gearings; Eccentric gearings with means for temporary energy accumulation, e.g. to overcome dead-centre positions
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- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18144—Overcoming dead center
Definitions
- My invention relates to mechanism for reversin g motion and overcoming dead-centers and it consists in the improved construction and combination of parts, as hereinafter described and claimed.
- Figure 1 is a side elevation, the full lines representing the position of parts for reverse motion and the dotted lines the position of parts for direct or right motion.
- Fig. 2 is a top View, and Fig. 3 a modification.
- A represents a piston-rod having elongated slots 00 0;, and connected by pins 1) b, proj ect- 1ng through said slots, to a block B, sliding in guides O O.
- E is the pitman pivoted at e to the sliding block B and pivoted at e to a bell-crank lever F, connected by links or rods G G with a lever H, having an elongated slot h, which receives a pin h, extending from the pistonrod A.
- I is a block sliding in suitable guides in a direction at right angles to the piston-rod A, and carrying a frame or guide J, having a groove or slot j parallel to the piston-rod and adapted to receive the fulcrum pivot or pin j, extending from the lever II.
- the 1ever K is a lever pivoted at la to the supporting frame and pivoted at to the reversing-lever L, which is pivoted at its fulcrum lto the supportingframe and connected with the sliding block I by a pin 1', extending through the elongated slot q) in the lever L.
- the 1ever K is provided with a groove or slot f, ellip- Serial No. 339,568. (No model.)
- the pitman E In connecting the parts the pitman E is set at the outer dead-center and the piston-rod A at the end of the outward stroke, with the pins 1) b occupying the inner ends of the slots a a, so that the piston-rod in making the inward stroke will draw upon the lever H by means of the pin h, but will not impart motion to the sliding block B until the outer ends of the slots 0. a come in contact with the pins Z) I).
- the pitman being at the outer dead-center, as above described, the operation is as follows:
- the piston-rod A being started on the inward stroke, the pin h will cause the lever II to turn on its fulcrum j, and the motion being communicated by the rods G G to the bell-crank lever F will cause the pitman E to turn on the pivot-pin cand carryits outer end over the dead-center.
- the reversing-lever L is raised so as to bring the fulcrum-pivot j above the piston-rod, the inward stroke will throw the pitman down and the outward stroke will throw it up, and the revolution of the crank will be direct or right.
- the lever L is depressed, bringing the fulcrum-pivot j below the piston-rod, the inward stroke will throw the pit man up and the outward stroke will throw it down, causing reverse motion of the crank.
- the mechanism may be modified, as shown in Fig.
Description
(No Model.)
P B. LANDG-RAF. MECHANISM FOR RBVERSIN'G MOTION AND OVERGOMING DEAD CENTERS.
No. 428,681. Patented May 27, 1890.
UNITED STATES PATENT OFFICE.
PHILIP B. LANDGRAF, OF SOUTH BEND, INDIANA.
MECHANISM FOR REVERSING MOTION AND OVERCOMING DEAD-CENTERS.
SPECIFICATION formingopart of Letters Patent No. 428,681, dated May 27, 1890.
Application filed February 7, 1890.
To all whom it may concern.-
Be it known that I, PHILIP B. LANDGRAF, a citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Mechanism for Beversing Motion and Overcoming Dead-Centers; and I do declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompany- 1ng drawings, and to the letters of reference marked thereon, which form a part of this specification.
My invention relates to mechanism for reversin g motion and overcoming dead-centers and it consists in the improved construction and combination of parts, as hereinafter described and claimed.
In the accompanying drawings, Figure 1 is a side elevation, the full lines representing the position of parts for reverse motion and the dotted lines the position of parts for direct or right motion. Fig. 2 is a top View, and Fig. 3 a modification.
Similar letters refer to similar parts through out the several views.
A represents a piston-rod having elongated slots 00 0;, and connected by pins 1) b, proj ect- 1ng through said slots, to a block B, sliding in guides O O.
D is the crank.
E is the pitman pivoted at e to the sliding block B and pivoted at e to a bell-crank lever F, connected by links or rods G G with a lever H, having an elongated slot h, which receives a pin h, extending from the pistonrod A.
I is a block sliding in suitable guides in a direction at right angles to the piston-rod A, and carrying a frame or guide J, having a groove or slot j parallel to the piston-rod and adapted to receive the fulcrum pivot or pin j, extending from the lever II.
K is a lever pivoted at la to the supporting frame and pivoted at to the reversing-lever L, which is pivoted at its fulcrum lto the supportingframe and connected with the sliding block I by a pin 1', extending through the elongated slot q) in the lever L. The 1ever K is provided with a groove or slot f, ellip- Serial No. 339,568. (No model.)
tical in shape, forming a guide for the fulcrum pivot or pin f, extending from the bellcrank lever F.
In connecting the parts the pitman E is set at the outer dead-center and the piston-rod A at the end of the outward stroke, with the pins 1) b occupying the inner ends of the slots a a, so that the piston-rod in making the inward stroke will draw upon the lever H by means of the pin h, but will not impart motion to the sliding block B until the outer ends of the slots 0. a come in contact with the pins Z) I).
The pitman being at the outer dead-center, as above described, the operation is as follows: The piston-rod A being started on the inward stroke, the pin h will cause the lever II to turn on its fulcrum j, and the motion being communicated by the rods G G to the bell-crank lever F will cause the pitman E to turn on the pivot-pin cand carryits outer end over the dead-center. The outer ends of the slots to a now coming in contact with the pins b b, the motion of the piston-rod will be imparted to the sliding block B, pitman E, bellcrank F, and lever H,the pivot-pin f sliding in the slot f and the pivot-pin j in the slot j until the end of the stroke is reached and the pitman is at the inner dead-center. As the pins 1) b will now be at the outer ends of the slots at a, it is evident that the outward stroke of the piston-rod will operate first upon the lever II and bell-crank F, so as to carry the pitman over the inner dead-center before imparting the forward motion to the sliding block B. WVhen the reversing-lever L is raised so as to bring the fulcrum-pivot j above the piston-rod, the inward stroke will throw the pitman down and the outward stroke will throw it up, and the revolution of the crank will be direct or right. On the other hand, if the lever L is depressed, bringing the fulcrum-pivot j below the piston-rod, the inward stroke will throw the pit man up and the outward stroke will throw it down, causing reverse motion of the crank. Where reverse motion of the machinery is not desired, the mechanism may be modified, as shown in Fig. 3 of the drawings, in which the reversing-lever Ii, sliding block I, guide J, lever H, and connecting-rods G G are omitted, a single bell-crank lever F being used in place of the ICO double bell-crank lever F, a stationary guide K used in place of the lever-guide K, and a connecting-rod G pivoted directly to the piston-rod A and to the bell-crank lever 1*".
Having fully described my invention, what l claim, and desire to secure by Letters Patent, 1s-
1. The combination of the piston-rod A, having slots a a and pin 71/, the sliding block B, having pins 1) b, the pitinan E, the crank D and its shaft, the lever II, having a slot 71 and pin j, the connecting-rods G G, the bellcrank lever F, having pin f,the lever K,having' a slot f, the sliding block I, the guide J, having; a groove or slotj, and the lever L, all
Publications (1)
Publication Number | Publication Date |
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US428681A true US428681A (en) | 1890-05-27 |
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US428681D Expired - Lifetime US428681A (en) | Mechanism for reversing motion and overcoming dead-centers |
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