US1636758A

US1636758A - Fan attachment for sewing machines

Info

Publication number: US1636758A
Application number: US157191A
Authority: US
Inventors: Renna Simone; Renna Leuigi
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-12-27
Filing date: 1926-12-27
Publication date: 1927-07-26
Anticipated expiration: 1944-07-26

Description

I 2 19 y 27 s. RENNA ET AL FAN ATTACHMENT FOR SEWING MACHINES 2 sheets-sheet 1 Filed Dec'. 27. 1926 INVENTORS July 26, 1927. 1,636,758

5. RENNA ET AL.

FAN ATTACHMENT FOR SEWING MACHINES Filed Dec. 27, 1926 2 Sheets-Sheet 2 I A TTORNEX Patented July 26, 19?.7.

uirao STATES 1,636,758 {PATENT "OFFICE.

SIMONE RENNA, OF BROOKLYN, AND IJEUIGI RENN'A, OF NEW Y ORK, N.,Y.

FAN ATTACHMENT FOR'SEWING MACHINES.

Application filed December 27, 1926. Serial at. 157,191.

The present invention relaies'to improvements in sewing machine. attachments, and has for an object toprovide a fan and supporting and driving means, whereby the movement of the fan may be occasioned by the driving mechanism of the sewing machine, and whereby further the momentary stopping of the sewing machine or the impulsive operationthereof may not interfere with the continuous movement of the fan element.

Another object ofthe invention is to 'provide a fan attachment for sewing machines, in which the fan element is mounted for adjustment to direct the air in any desired vertical or horizontal line toward or away from the operator of the machine.

A further object of the invention resides in providing a fan attachment of simple, compact and inexpensive form, and which is susceptible of being attached to; the. machine without requiring any alterationtherein.

With the foregoing and other objects in 'view, the invention will be more fully described hereinafter, and will. be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views:

Figure 1 is a fragmentary front elevation of a sewing machine with the improved fanattachment; V

Figure 2 is an end View thereof;

Figure 3 is a fragmentary rear view of the same;

Figure 4 is a fragmentary vertical sec tion taken on an enlargedscale through the fanshaft and its supporting .means;

.Figure 5 is a vertical section taken on the line 55 in Figure 4; I

Figure 6 is a similar section taken onthe line 6-6 also in Fig. i;

. Figure? is a section taken .on the line 7'. in Figure 2; and

Figure 8 is a cross-section taken on the line 8-8 in Figure 7.

Referring more, particularly to the drawings, 1O designates the table and 'llfthe inetalframeworl-t of a usual formof sewing machine having the, belt pulley, wheel 12 driven by the belt connection 13 either through a treadle or by other appropriate motive power. I r

In accordance with the present invention,

the drive belt 18 is, utilized to drive the fan I arated.

element, "and for this purpose a grooved wheel 14: is provided to engage with one run bracket arm 19 having an opening 20 to freely receive said bearing sleeve 16. The

bearing sleeve 16 is held inplace against exial movement on the bracket arm '19 by means of the

post nuts

21 and 22. 'Byiru'nning fone ofthese nuts off the sleeve, the bracket arm and bearing sleeve maybe sep- The bracket arm 19 isshown as extending down and adjustable horizontally through the'slot 23 an'd set screw f2l, the. support for the bracket armbeing had from the vertical-web 25 of amain bracket, provided with the horizontally j 'elong'ated slots 26 shownin Fig. 2, to receive the post or set screw 27 projecting out "from'th e sewing machine standard.

V The web 25 of the'main bracket isprovided with a horizontal web portion 28 for "sustaining at its innerfree end thepostfl29,

which carries mean, this post being provided with-the collarBQ', having the slotted eXtension -piece 31 j for receiving the set screw andpost 32projecting out from the upper portion of the sewing machine column, whereby to steady the fan post 29] 'At'its upper end the fan ,postis provided with the longitudinally'perforated'block 33, having the set screw for securing 1n adjusted position the rod 35. v This rod is threaded at its upper end, to which the nuts 36 and 37 areapplied, holding therebetween the intermediate portion of the faniyolre 38. shown in Fig. 5, the fan yoke is provided with" the trunnions 39 and 4:0, which engage at diametricallyopposite'points the spherical block e1. 'lhroughthis block and extending at substantially right angles to the axes of the trunnions 39 and 40, but

in substantially the same plane therewith is a bearing sleeve",42".havi ng its ends 43 and 4H flange d. The bearing sleeve is adapted to receive the fan shaft 45, which projects beyond both ends of the spherical 'bloclr, carr'ying at one end the grooved pulley 46, engaged by the yieldable, resilient or stretchable belt 47 driven by the grooved wheel 48 carried upon the shaft 15 and drivenfrom the grooved wheel 14, which engages the drive belt 13 of the machine.

The grooved wheel 46 engages at one side against the enlarged flange 44 of the bearing sleeve 42 and at its opposite side aga nst the nut 49 threaded upon the projecting end of the fan shaft 45. The opposite smaller flange 43 of the bearing sleeve is countersunk in the spherical block 41 and relieves the block of the wear of the fan cage 50. This fan cage is shown as composed of four arms spaced at 90 and having their free ends bent outwardly and carrying therein the wire guard 51 at the front of the fan, the blades of which are designated at 52. These blades are carried by a hub 53, which is loosely mounted on the fan shaft and is provided with the inclined or ratchet teeth 54, as shown in Fig. 6. The hub and ratchet teeth are contained within a casing 55, to which is secured, as indicated at 56, a long volute spring 57, enveloping the ratchet teeth 54 completely and having its free inner end disposed to engage against the abrupt shoulders of the teeth for driving the teeth and incidentally the fan hub and blades in a counter-clockwise direction, as viewed in Figure 6.

The casing 55 is composed of the outer circumferential rim 55 and the right angular disc 58, which is affixed as by the

nuts

59 and 60 to the adjacent threaded end of the fan shaft 45.

The spherical block 41 is provided on its end portion with an arcuate rack 61 engaged by a dog'62 having an arcuate tooth engaging edge 63 extending at right angles to the direction of the arc of the rack 61 and having its convex side disposed toward said rack, whereby the dog may be swung out of engagement with the teeth of the rack to permit the spherical block 41 to be adjusted about the horizontal trunnions 39 and 40. The fulcrum or pivot 64 of the dog is shown as being carried by an upturned ear 65 extending laterally from the intermediate portion of the yoke 38.

In the use of the device, the movement of the drive belt 13, as by the depressing of the treaclle of the sewing machine, will operate to rotate the grooved wheel 14 in contact therewith. A like rotary movement is communicated to the shaft 15 and pulley 48 thereon. The belt 47 is thereby driven, driving in turn the pulley 46, fan shaft 45, casing 55, spring pawl 57 and the ratchet hub and fan blades. Should the sewing machine be momentarily stopped for any reason, the fan blades 52 and hub carrying same will continue to rotate in the counterclockwise direction indicated by the arrow in Fig. 6, the inclined sides of the teeth 54 simply slipping over the free end of the volute pawl spring 57 and racing ahead of the housing 55. The same result will be had when the sewing machine is operated i'itfully. The fan will not thereby stopped and started impulsively, but it will be permitted to rotate more or less continuously, its continuous movement being had by the momentum previously acquired.

Various adjustments are made possible by the slot 26 in the main bracket, enabling the fan to be adjusted toward or from the operator. It may also be raised and lowered by adjusting the set screw 34 and the elastic belt 47 will take up any slack that would otherwise occur in an inextensible belt. Moreover, the. fan may be directed up or down by first disengaging the dog 62 and then swinging the spherical block 41 on the horizontal trunnions 39 and 40 of'the yoke. The tailpiece or handle 66 of the dog will possess sufficient weight to swing the dog back into engagement with the teeth 61 merely upon release of the operator. 1 The groove in the pulley 46 will be sufficiently deep to hold the belt against escaping when this last mentioned adjustment is made, as provision is also made for supplying'lubricant to the various parts.

It will be obvious that many changes in the construction, combination and arrangement of parts could be made, which could be used without departing from the spirit of our invention, and we do not mean to limit the invention to such details, except as particularly pointed out in the claims.

Having thus described our invention, What we claim and desire to secure by Letters Patent of the United States is:

1. In combination with a belt driven machine, a fan, and means driven by said belt driven machine for communicating movement to the fan and for causing the fan to run free of said means and by its own momentum on slowing or stopping of the machine.

2. In combination with a sewing machine having a belt drive, a fan, means for driving the fan from movement derived from said belt, and means for causing the fan to run free ahead of said drive means when the belt is slowed or stopped,

3. In combination with a belt driven machine, a fan, a ratchet mechanism for driving said fan in one direction and causing the fan to run free when the ratchet mechanism is slowed or stopped, and connections between said ratchet mechanism and the belt I carried by said bearing member, means for H driving said shaft by movement derived from the belt, a fan coupled to be driven by said shaft when rotated in one direction, and means whereby the fan may run ahead of the shaft when the latter is slowed or stopped.

55. In a belt driven machine, a support, a bearing member carried by said support, a fan shaft journalled in said bearing member, means for driving said shaft, a housing fixed to said shaft, a fan having a hub loosely mounted over said shaft and provided with ratchet teeth in the housing, and a volute spring secured in the housing and wound about said hub with its free end engaging the ratchet teeth, said free end being biased to the center of the hub.

6. In a belt driven machine, a support, a bearing member carried thereby, a fan shaft journalled through said bearing member, means for driving said fan shaft, a fan loosely mounted about said fan shaft, couplin means fixed to move with the shaft and to drive the fan in one direction, but to release the fan when stopping or slowing below the rate of speed acquired by the momentum of the fan, and means for adjusting said bearing member about a substantially horizontal axis.

7. In a belt driven machine, a support, a yoke adjustably carried by said support, a bearing member swivelly carriedin said yoke, a fan carried by said bearing member, means for driving said fan, a rack carried by said bearing member, and a swivel weighted dog carried by said yoke for en gagement with said rack.

In testimony that we claim the foregoing as our invention, we have signed our names hereto.

SIMONE RENNA. LEUIGI RENNA.