US1188903A

US1188903A - Gyrating driving mechanism.

Info

Publication number: US1188903A
Application number: US4550515A
Authority: US
Inventors: John B Cornwall
Original assignee: Barnard and Leas Manufacturing Co Inc
Current assignee: Barnard and Leas Manufacturing Co Inc
Priority date: 1915-08-14
Filing date: 1915-08-14
Publication date: 1916-06-27
Anticipated expiration: 1933-06-27

Description

J. B. CORNWALL.

GYRATING DRIVING MECHANISM.

APPLICATION man AUG.I4, 1915.

Patented June 27, 1916.

2 SHEETS-SHEET I Snow stow B. CORNWALL.

GYRATING DRIVING MECHANISM. APPLICAflON FILED AUG-14, 1915- 1 1 88,903 Patented June 27, 1916.

2 SHEETS-SHEET 2- an n;

JOHN B. .OOBNWALL, OF 'MOLINE, ILLINOIS, ASSIGNOR '1'O BARNARD AND LEAS MANU- v FACTURINGOOMPANY, F MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

GYRATING DRIVING MECHANISM.

messes.

Specification of Letters-Patent; Patented J 27 1915 Application filed August 14, 1915. Serial No. 45,505.

This invention relates to driving means.

for imparting a gyratory motion to bodies or arts of machines, and is particularly '15 designed for use in connection with socalled Plansifter bolting machines.

The principal object of the invention is to obviate the objectionable jarring, shaking or vibrations ordinaril from the gyratory body to t e building in which same is installed. There are now in general cipal types of. g'yratory drives for plansifters. One of these commonly known as the rigid type drive insures that the gym- I tions of the moving body shall be practically uniform when the machine is 111 operation, and the work of the machine is thereby rendered more uniform, but such' .30 rigid drive produces annoying vibrations and jarring of the building in which the ma chine having such a drive is installed. The other commonly known as the vibro-motor drive does not impart uniform or reliable gyratory motions to the moving body, and because of the variations in movement the work of the machine is rendered unequal or defective.

The present invention aims to retain the 40 advantages and overcome the defects of both the aforesaid types of drives, andto provide a dri ing mechanism whereby the gymtory movements imparted to the sieve or other objects can be maintained constant anduniform, and the' transmission of objectionable shocks or vibrations entirely eliminated, or reduced to such a ininirnumthat the objections to and annoyances arising from the use of plansifters as hereto. fore-constructed will be obviated.

V The invention in brief consists in novel .means for driving ating bodies, suchas plansifter sieves an the hke, said driving means beingfso constructed and counter- 55 balanced as to in itself take up the strains elevation of the transmitted use two prinmovably mounted, as hereina of the socket 1 of centrifugal force and obviate jarring and vibration, and being also flexible so that the degree of gyratory motion imparted from the driving shaft to the driven object may be varied. c I will explain the invention as employed 1n connection with a well known type of plansifter flour bolting machine, and set orth in the claims the features and combmatlons of parts for which protection is as desired. I y

In the drawings: Fi re 1 is a sectional elevation of a plansi er with a driving mechanism embodying my invention; Fig.

is an enlarged top pkla'n viewfof the driva mg mechanism detac ed; Fig. 3 is a side arts illustrated in Fig. 2; and Fig. 4 is a etail bottom plan view of a art of the driving mechanism.

eferrlng to the drawings, A designates m the sieve box of a plansifter, which may be suspended by rods B in the usual manner from over-head supponts C in the building in which the machine is to be used.

-;Below the sieve box is the driving m'echaan nism which in general appearance resembles the so-called rigid type drive, and in cludes a base member E in which is a vertical driving shaft having its lower end mounted on a step-bearing G in the base, as and journaled near its upper end in adjustable bearings F in the base member. A pulley H is attached to the upper end of said v.

shaft by which it can be rotated.

Attached to the underside of the sieve'w box is 9. depending pin or stud shaft J which engagesa ,member connected with the shaft D; so that whenthe shaft 1) is rotated a Eyratory motion is imparted to the sieve ox. V a y The parts thus far referred to are, or may be, similar to those commonly used on plansifters and needno further detailed explanation herein. v

The stud J depends into a socket or rewe cess 1 in a casting 1 (see Fi 2) which is r explained, upon shaft- D. The operative engagement between casting l-and stud J maybeadjust ed by means elf-bearing plates 3 enga we the sides of the stud and supporte .b means of bolts 3 tapped through he wall s The "1 is provided'at one side of socket 1! mt an a 'ustable weight 2; and 3110 said weight can be adjusted toward or from the stud J by means of a threaded shaft 2 journaled in the casting 1, as shown. The weight is shown as provided withv an opening in which is confined a nut 2, threaded on the shaft 2,'so that the nut travels along the shaftwhen the latter is rotated, thereby shifting the weight to or from the stud J. The shaft2 has a squared outer end by which it can be turned by a wrench or other suitable tool, to adjust the weight.

The casting l is shown as provided with sleeves l at its sides by which it is slidably supported on rods 4 mounted between studs 5, 5 on the upper surface of a casting or.

plate 5 mounted upon the upper end of the.

shaft D, and preferably rigidly attached thereto in any suitable manner, as by bolts 5, as indicated in Fig. 1. Springs 44 are strung on'rods 4 between'the studs 5 and the adjacent ends of the sleeves 1 ,'and normally tend to press the casting 1 in a direction away from the studs 5.

The plate 5 is provided at one end, below the weighted end of the plate 1, with an adjustable weight 6 having a slot 6 in which is confined a 'nut 6 threaded on a shaft 6 journaled in lugs or flanges depending from the plate 5; and by turning shaft 6 the nut 6 is traveled along the shaft and the weight 6" adjusted toward or from the shaft D.

The parts are so adjusted that when the shaft D is rotated the stud J will become more or less eccentric to the axis of the shaft D and thereby impart the desired extent of gyratory or orbital motion to the body or sieve box. The construction is such as will allow the sieve box when the machine is in operation to press the stud J in a direction to compress the springs 4 The momentum of the sieve box tendsby centrifugal force to further increase the eccentric displacement of the stud J relative to the shaft D,- but this is opposed by the springs l and by adjusting the weight 2 any excessive centrifugal force exerted by the sieve box upon the springs 4 can be counterbalanced or neutralized.

The weight 6 is adjusted to counterbalance or neutralize the centrifugal force tending to eccentrically displace the shaft D in its bearings when the machine is in operation; and to relieve the plate 5 and shaft D of the lateral pressure which is exerted by centrifugal force through the plate 1 from the sieve box against the springs 4 when the machine is in operation. 3 By the described construction and arrangement of the parts when the machine is in operation motion is transferred from the shaft D to the stud J and centrifugal force tending to unduly displace the sieve box is compensated for or neutralized by.

the weights when properly adjusted.

The construction, above dGSCI'lDGCl and' illustrated in the drawings will when properly adjusted automatically take care of and compensate for the eccentric thrust or pressure exerted by the centrifugal force of the sieve box through stud J against its bearings in plate 1, and all such strains will be taken u within the drive, and obviate or practically reduce to an immaterial factor the vibration and jarring which would be transmitted by the old .type of plansifter drive. v

WhatI claim is:

1. Means for imparting gyratory motion to objects, comprising a driving shaft, a driven member eccentric thereto and movable transversely ofthe driving shaft, means adapted to resist the lateral movement of said driven member due to centrifugal force, and means to counteract or neutralize excessive effects of centrifugal force.

2; In means for imparting gyratory mo 7 tion to objects, a driven sha a body to be gyrated, a stud connected with said body and operatively engaged with said driving shaft, spring means for resisting the centrifugal force tending to shift the stud eccentrically of the driven member when the machine is in operation, and adjustable teracting the effect of excessive centrifugal force.

4. In means for imparting gyratory motion, a driven shaft, a member rigidly connected with said driving shaft, av second member slidably mounted upon said rigid member and movable transversely of the shaft; a body to be gyrated, a stud connected with said body and engaged with said transversely movable member, spring means resisting the centrifugal force tending to-shift the movable member upon the fixed member when the machine is in operation, and means connected with said movable member to com ensate for and neutralize excessive centri ugal force.

5. In a gyratory drive for plansifters an the like, the combination of a driving shaft, a member fixedly attached thereto, a transversely movable member mounted upon said fixed member, and springs adapted to retain the movable member in normal position and resist the action of centrifugal force when bod and havin I y it the machine is in operation; with a bodygf weight on said movable casting, with a sieve a stud attached thereto having a rotatable engagement with said movable member, and means mounted on 'the movable member adapted to counterbalance or neutralize excessive thrust of the gyrating body when the machine is in operation.

6. In a gyratory drive for plansifters and the like, the combinationof a driving shaft,

a member fixedly attached thereto, a transversely movable member mounted upon said fixed member; springs mounted upon the fixed member adapted to retain the movable member in normal position and to resist the action of centrifugal force when the machine is in operation; with a body, a stud attachedthereto axially parallel with the driving shaft and having a rotatable engagement with said movable member, and weights mounted on the said members to counterbalance or neutralize excessive thrust of the gyrating body when the machine is in operation. 1

7. In a drive 'mechanism for plansifters and the like, the combination of abase, a shaft journaled therein, means for rotating said shaft; a plate attached to the upper end of said shaft, a movable plate slidably mounted on the fixed plate, springs for holding said movable plate in normal position, a sieve body, a stud attached to said a rotatable engagement with said mova plate, and an adjustable counterbalancing weight on said movable body and a'stud attached to said body having arotatable engagement with' said movable casting, substantially as described:

9. In a drive mechanism for plansifters and the like, the combination of a base, a

shaft journaled therein, means for rotating said shaft; a plate attached to the upper end of said shaft, a movable plate slidably mounted on the fixed plate, rods mounted on the fixedplate, springs on said rods for holding said movable plate in. normal posi tion, a sieve body, a stud attached to said body and havin A a rotatable. engagement with said movale plate, and adjustable 'weights on said plates whereby when the machine is in operation the shocks and jars due to the gyratory movements of the body are com ensated for between said body and the driving shaft. 10. In a drive mechanism for plansifters and the like, the combination of a base, a vertical shaft journaled therein, means for rotating said shaft; a casting mounted transversely of and upon the upper end of said-shaft and fixedly attached thereto, an adjustable weight on said casting, a second casting slidably mounted on the fixed casting, rods mounted on the'first casting engaged by sleeves on the movable casting for guiding and holding the latter, springs on said rods; for holding said movable casting in normal position, and an adjustable weight on said movable casting; with a sieve body plate, substantially as and for the purpose *to be gyrated, and a stud attached ,to said described.

8. In a drive mechanism for plansifters and the like, the combination ofa base, a vertical shaft journaled therein, means for rotating said shaft; a casting mounted transversely of and upon the-upper end of said shaft and fixedly attached thereto, an

adjustable weight on said casting, a second casting slidably mounted on the fixed cast ing, springs fps holding said movablecasting in normal POSltlOIl andan adjustable body ,and axially parallel with the driven shaft said stud havin a rotatable engages ment with said mova le casting whereby ,when the machine is in operation the shocks and jars due to the gyratory movements of ,the body are compensated forbetweensaid body and the drivin shaft.

In testimon that claim the foregoing as my own, I a mysignature JOHN B. CORNWALL;