US1746338A - Free-swinging mechanism for imparting reciprocatory movements - Google Patents

Free-swinging mechanism for imparting reciprocatory movements Download PDF

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Publication number
US1746338A
US1746338A US295812A US29581228A US1746338A US 1746338 A US1746338 A US 1746338A US 295812 A US295812 A US 295812A US 29581228 A US29581228 A US 29581228A US 1746338 A US1746338 A US 1746338A
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lever
swinging mechanism
free
reciprocatory movements
imparting reciprocatory
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Expired - Lifetime
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US295812A
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Denham Humphrey John
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Henry Simon Ltd
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Henry Simon Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • 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
    • Y10T74/18064—Head motions

Definitions

  • This invention relates to What are known as free swinging mechanisms for imparting reclprocatory movements to screens, conveyors, sieves and the like, the mechanism being carried by the part to be reciprocated.
  • the object of this invention is to provide improved and simplified means of the type aforesaid and it comprises a framehaving a crank shaft journalled therein and a slotted and weighted lever pivoted thereon, the crank pin of said shaft acting upon said lever so that unequal rates of acceleration are imparted thereto on the rotation of the shaft, the inertia of the weighted lever relatively to that of the complete structure or mass to be reciprocated and by which the said free swinging mechanism is carried, resulting in the de sired reciprocation of said mass atunequal rates on the forward and return strokes and with a jigging or jerking motion such as is desired in screens and the like.
  • Figure 1 is a sectional side elevation and Figure 2 a sectional end elevation illustrating a convenient application of the invention.
  • crank shaft a and crank disc I with the crank pin 0 projecting from one side of the same are enclosed within a frame or casing (Z by which the crankshaft a 1s carried; the sand frame (Z also pivotally supports the slotted and weighted lever c.
  • the frame or casing-d is secured to and carried by the suspended screen i or like part f to be reciproc'ated.
  • Theengag'ement between the crank pin 0 and lever e includes a block or slipper gadapted to slide between the sides of the lever gap or slot, the said sides serving as guides.
  • the lever e is weighted by iron or other metal plates as i attached to the opposite sides of the lever by studs as j.
  • a frame connected to the part to be reciprocated, a crank shaft journalled in said frame, a weighted lever pivotally carried in said frame, a crank pin upon said crank shaft movable in said lever away from and towards the lever pivot, and means for rotating said crank shaft whereb the weighted lever is oscillated.

Description

Feb. 11, 1930. J DENHAM 1,746,338
FREE SWINGING MECHANISM .FOR 'IMPARTING RECIPROCATORY MOVEMENTS Filed July 27, 1928 2 Sheets-Sheet 1 Fig.1
$ jpenh m Feb. 11, 1930. H. J. DENHAM 1,746,333
FREE SWINGING MECHANISM FOR IMPARTING RECIPROUATORY MOVEMENTS Filed July, 27, 1928 2 Sheets-Sheet 2 Fig.2
nvvewrae Patented Feb. 11, 1930 UNITED STATES PATENT OFFICE HUMPI-IREY JOHN DENI-IAM, OF MANCHESTER, ENGLAND, ASSIGNOR T HENRY SIMON LIMITED, OF MANCHESTER, ENGLAND, A BRITISH COMPANY FREE-SWINGING MECHANISM FOR IMPARTING RECIPROCATORY MOVEMENTS Application filed July 27, 1928, Serial No. 295,812, and. in Great Britain May 11, 1928.
This invention relates to What are known as free swinging mechanisms for imparting reclprocatory movements to screens, conveyors, sieves and the like, the mechanism being carried by the part to be reciprocated.
The object of this invention is to provide improved and simplified means of the type aforesaid and it comprises a framehaving a crank shaft journalled therein and a slotted and weighted lever pivoted thereon, the crank pin of said shaft acting upon said lever so that unequal rates of acceleration are imparted thereto on the rotation of the shaft, the inertia of the weighted lever relatively to that of the complete structure or mass to be reciprocated and by which the said free swinging mechanism is carried, resulting in the de sired reciprocation of said mass atunequal rates on the forward and return strokes and with a jigging or jerking motion such as is desired in screens and the like.
Referring to the two accompanying sheets of explanatory drawings:-
Figure 1 is a sectional side elevation and Figure 2 a sectional end elevation illustrating a convenient application of the invention.
Like reference letters in the two views indicate like parts.
As shown in the drawings, the rotating crank shaft a and crank disc I) with the crank pin 0 projecting from one side of the same are enclosed within a frame or casing (Z by which the crankshaft a 1s carried; the sand frame (Z also pivotally supports the slotted and weighted lever c. The frame or casing-d is secured to and carried by the suspended screen i or like part f to be reciproc'ated. Theengag'ement between the crank pin 0 and lever e includes a block or slipper gadapted to slide between the sides of the lever gap or slot, the said sides serving as guides.
The position of the lever gap or slot relatively to the rotating crank pin 0 is such that whilst each revolution of the said pin effects a complete reciprocation or back and forth movement of the lever e, the driving contact between the crank pin and the lever occurs, throughout such revolution, at constantly varying distances from the fulcrum or supporting pivot 72. of the Weighted lever. Due
to the inertia of the latter and its arrangement as aforesaid, unequal accelerations and jigging or jerking movements are imparted to the member 7 being reciprocated and by which the mechanism is carried, corresponding to such varying distances. In this man nor there is obtained in connection with for example a sieve or screen a very effective sifting or riddling and propelling action.
In the example illustrated, the lever e is weighted by iron or other metal plates as i attached to the opposite sides of the lever by studs as j.
The crank shaft or is driven through a belt as is or in any other convenient manner.
hat I claim is 1. In free swinging mechanisms of the type aforesaid, the combination comprising a frame secured to or connected with the part or structure to be reciprocated, a crank shaft journalled in said frame, and a weighted.
lever pivoted in the casing, said shaft having a crank pin engaged for vertical sliding movement with said weighted lever in such manner as to impart unequal rates of acceleration thereto, as set forth.
2. In free swinging mechanism of the type aforesaid, in combination, a frame connected to the part to be reciprocated, a crank shaft journalled in said frame, a weighted lever pivotally carried in said frame, a crank pin upon said crank shaft movable in said lever away from and towards the lever pivot, and means for rotating said crank shaft whereb the weighted lever is oscillated.
3. In free swinging mechanism asclaimed in claim 1 of the type aforesaid wherein a cover is provided for-the casing, the lever being pi'votally suspended from the under surface of the cover and provided at its lower portion with a vertical slot, a guide bloc-k mounted on the crank pin slidably engaged with the slot and weight members mounted on opposite sides of the lower portion of the lever.
In testimony whereof I have signed my name to this specification.
HUMPHREY JOHN DENHAM.
US295812A 1928-05-11 1928-07-27 Free-swinging mechanism for imparting reciprocatory movements Expired - Lifetime US1746338A (en)

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