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Publication numberUS455459 A
Publication typeGrant
Publication dateJul 7, 1891
Filing dateJan 17, 1891
Publication numberUS 455459 A, US 455459A, US-A-455459, US455459 A, US455459A
InventorsAlbert P. Gathright
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 455459 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

l(No Modell) 2 Sheets-Sheet 1. A. P. GATHRIGHT'.


No. 455,459. Q Patented July '7, 1891( e L AA L MJ A Q l H i A a: N i

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2 Sheets-Sheet 2.

(No Model.)


. MOTOR. 10.455,459.-

Pa-tented July 7,1891.

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SPECIFICATION forming part of Letters Patent No. 455,459, dated J' u1y' '7, 1891, Application filed January 17, 1891. N Serial No. 378,119. (No model.)

To all whom it may concern:

Be it known that LALBERT P. GA'IHRIGHT, a citizen of the United States, residing at Meridian, in the county of Lauderdale and State of Mississippi, have invented a new and useful Motor, of which the following is a specification.

This invention has relation to improvements in spring-motors adapted for running' light machinery, and is especially adapted for operating sewing-machines.

The objects of the invention are to provide a spring-motor of cheap and simple construerion adapted to receive its motive power from .the simple form of coiled spring, to provide means for placing` the spring or springs under Y tension and for converting their strength into Fig. 3 is a vertical longitudinal section. Fig.

4 is a transverse section. Like numerals of referencejndicate like parts in all the figures of the drawings.

In practicing my invention I construct a frame-Work which consists of opposite longitudinal side bars 1, connected at their outer ends by a transverse end bar 2. The opposite or inner ends of the side bars are fastened to an oblong transverse frame 3, disposed at a right angle to the main frame, and the two frames are bolted together and supported by suitable legs at. To the end bar 2 of the main bracket 5, having a bearing at its innerend, which is longitudinally opposite a similar bearing G in the side bar of the frame 3. In these bearings there is mounted for rotation 4a shaft 7, the inner end of which extends beyondthe bearing 6 and into the frame 3. The cross-bar 2 and the side bar of the frame S'forming the cross-bar at the opposite end of the machine are connected at each side of Y 1 the shaft 7 by means of guide-rods 9.

l10 designates a yoke-plate, the opposite ends of which are recessed or bifurcated to loosely embrace the opposite longitudinal side bars of the -main frame. This yoke-plate is pro- Ivided with perforations l1 for the passage of the guide-rods, and from its vrear face there projects a bored stud 12 for the reception of the shaft 7. The shaft 7 between its bearings is provided with spiral grooves 13, and above the stud there projects rearwardly from the yoke-plate a bar 14, provided upon one side with rearwardly-disposed teeth 15, combined to form a ratchet or rack-bar. A transverse strap or supporting-bar 16 spans the distance between and connects the two longitudinal side bars, and upon the same is mounted a guide -block 17, through which the rack bar passes. At one side of the 'block there is pivoted to the supportingbar, as at 19, a lever 20, to the inner end of which is pivoted a paWl 2l, the inner end of which is designedto engage the rack-bar. A

bell-crank 22 is pivoted tothe lever, and a rodv 23 leads from the lower end of the bell-crank to the outer end of the ratchet, said rod passing through a bracket-eye 24, between which and the ratchet and coiled about the rod is a spring 25, serving to normally disengage the ing-bracket of the main frame, and the oppo site ends of said pin protrude at each side of the bracket. outer ends connected to the pins and their inner ends connected to the yoke-plate and serve to-draw the plate toward the outer end of the main frame. Auxiliary springs 28 encircle tlie guide-rods between the side bar of the supplemental frame and the yoke-plate andaid the main springs in forcing the yokeplate to the rear.

. Loosely mounted upon the shaft 7 Within the oblong transverse frame Sis a large gear 29, having'a pawl 30, spring-pressed into engagement with a ratchet-wheel 3l, fixed upon the shaft. The gear is loose upon the shaft and operates therewith when moved in one direction, by reason of its pawl engaging with said ratchet-wheel, while at the same time said gear canmove in the oppositedirection Coiled springs 27 have their l ICC independent of the shaft, during which movement the pawl will ride over the teeth of the ratchet. The large gear engages and drives a small pinion 33, mounted upon a shaft 34 at the opposite end of the oblong frame 3, and upon said shaft is mounted a grooved pulley 35, which connects with the wheel of the sewing-machine, or may lead to the drive-wheel of any machine. Secured to one end of the frame 3 is a curved standard 36, formed of spring metal and provided with keepers 37,

I in which is located a spring metal curved friction-arm 38, terminating in a plate embracing the periphery of the large gear 29 and being adjustable upon the standard by means of a set-screw 39.

40 designates a pair of spring-clamping arms, secured to the end of the frame 3 and embracing the shaft 7 beyond the gear 29. A stirrup 4l loosely embraces the clampingarms and a set-screw 42 projects through the stirrup and bears upon the arms, thus serving to clamp the arms upon the shaft.

In operation, the bell-crank lever is pressed so as to engage with the teeth of the rack-bar and the operating-lever thrown to the rear, which serves to force the rack-bar and the yoke inwardly. The pawl is then withdrawn and the lever thrown to the front, and said pawl swung into re-engagement with a sncceeding tooth, and in this manner the rackbar is fed. As the yoke moves to the front by reason of the spirally-bored stud thereof engaging with the grooves of the shaft 7, said shaft is rotated and its rotations are not imparted to the large gear 29 by reason of the fact that the pawl of said gearrides over the teeth of the ratchet of the shaft, and hence no connection is made between the shaft and ratchet. In order to prevent any possibility of the gear turning during this windin g up of the spring and a storing of the power, I provide the curved spring-clamp heretofore described, which is moved over upon the periphery of the wheel and serves to retain the same against any movement whatever. By means of the set-screw and its stirrup, as heretofore described, said tension-arms may be clamped upon the shaft 7, and when the spring-clamp orbrake is removed from the wheel the springs serve to draw the yoke-plate toward the outer end of the main frame, and in so doing rotate the shaft 7 and its gear, which latter imparts motion, through the medium of the pinion and pulley, to a machine to which it is desired to transmit power.

Having described my invention, what I claim is l. In a motor, the combination of the framework, a spirally-grooved shaft, a yoke having an opening fitting and receiving the shaft, springs for drawing the yoke in one direction, means for moving the yoke in the opposite direction, a gear loosely mounted on the shaft, a pawl on the gear, la ratchet fixed upon the shaft and normally engaging the pawl, and a device for locking the wheel against rotation during said movement of the yoke, substantially as specified. n

2. In a motor, the combination ofthe framework, the spirally-grooved shaft, the gearwheel, the sliding yoke having an opening fitting the shaft, springs for drawing the yoke in one direction, and means for operating the yoke in the opposite direction, of a tension ffllevice for said shaft, substantially 'as speci- 3. In amotor, the combination-of the frame, the spirally-grooved shaft, the gearwheel mounted on the shaft, the sliding yoke having an opening for the reception of the shaft, springs for drawing the yoke in one direction and means for operating the yoke in the opposite direction, a support, a pair of springclamps extending from the support and embracing the shaft, a stirrup embracing the clamps, and a set-screw passing through the stirrup and bearing against one of said arms, substantially as speciiied.

et. In a motor, the combination, with the yspirally-grooved shaft, the frame-work for supporting the saine, the reciprocating yoke, and means for reciprocating the same, of springsfor drawing the yoke in one direction, alarge gear havinga pawl and loosely mounted on the shaft, a ratchet-wheel rigidly mounted on the shaft and engaged by the pawl, a curved spring-metal standard located opposite the periphery of the gear and provided with keepers, and a sliding spring-arm mounted therein bearing against the gear, and a setscrew-for adjusting the arm upon the standard, substantially as specified.

5. In a motor, the combination, with the frame-work, the rotatable spirally-grooved shaft, and the wheel upon the same, of a sliding yoke grooved vto receive and it the shaft, a rack-bar projecting from the yoke, a lever pivoted at one side of the rack-bar, and a spring-pressed pawl for engaging the rackbar, substantially as specified.

6. In a motor, the combination, with the frame provided at one end with an inwardlydisposed bearing-bracket and abearing-opening aligning with an opening formed in the end of the same, a spirally-grooved shaft journaled in the opening, a wheel mounted upon the shaft, and a pin passing transversely through the bracket, of a yoke-plate mounted for reciprocation upon and having an onening receiving and fitting the shaft, a rackbar extending rearwardly from the yoke, a lever pivoted at one side of the rack-bar, a pawl pivoted in the end of the lever, a spring for withdrawing the pawl, mechanism for throwing the pawl into engagement with the rackbar, and a pair of coiled springs connected at their front ends to the yoke and at their opposite ends to the frame, substantially as specified.

7. In a motor, the combination, with an oblong frame, a bracket extending from one end of the frame inwardly, a spirally-grooved shaft journaled in the frame and in the end IOO IIO


455,459 t l e of the bracket and extending beyond the end of the frame, a wheel mounted on saidV end, a yoke mounted on the shaftand having an opening fitting and receiving theshaft, coiled springs connected at their front Vends to the yoke and at their rear ends to the end of the frame, rods passing through the yyoke-plate and connecting the opposite ends of the trame, and coiled springs interposed between the yoke-plate and the inner end of the frame, of Y means for distending the rear coiled springs and compressing the front pair of springs, substantially as specified.

8. The combination, with the main oblong frame, the secondary frame located 'at one -end of the same and disposed at a right angle y jecting into said' secondary frame, a ratchet l thereto, n the inwardlydisposed bearing'- bracket, the bearing of which aligns with ,a bearing formed in the side of the secondary frame, a spirally-grooved shaft mounted in the bearings and having its inner end proixed upon the shaft, a gear loose upon the shaft at one side of the ratchet and having the spring pressed pawl for engaging the` V same, a short shaft mounted at one side of the coiled springs encircling the same between the front face of the yoke and the secondary frame, the pivoted lever' having the bell# crank, the spring-pressed VpaWLand the rod connecting the same with the rear endv of the pawl, substantially as speciiied.`

In testimony that Irclaim the `foregoing as my own IShave hereto aflixed my signature in presence ot' two witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5384648 *Jan 6, 1994Jan 24, 1995Scitex Corporation Ltd.Apparatus and method for descreening
Cooperative ClassificationF03G1/00