US1239161A - Fan attachment for swings. - Google Patents

Description

T. W. CRABTREE.

FAN ATTACHMENT FOR SWINGS. APPLICATION FILED SEPT. 23, 1916.

Patented Sept. 4, 1917.

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FAN ATTACHMENT FOR SWINGS.

APPLICATION FILED SEPT. 23, I916.

LQQJLMD Patented mm; 4, 191?.

2 SHEETSSHEET 2.

awe-414214 ISAAC W. CRABTREE, 0F CAIRO, ILLINOIS.

FAN ATTAGHMENT FOB SWINGS.

Specification of Letters Patent.

Patented Sept. at, 1217.

Application filed September 2a, 1916. se ial No. 121,793.

To all whom it may concern.

. )e it known that I, IsAAc WV. C ABTREE, a

citizen of theUnite d States, residing at cient device readily attachable to any swing and so constructed that theswinging movement of the swing proper gives constant revolution to the fan alwaysin the same direction.

It has for a further object to provide efficient means for insuring ease of operation and avoiding damageto the mechanismby reason of overwrapping of the cords upon their drums. I

Other objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appendedclaims.

The invention is clearly illustrated in. the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which- Figure 1 is a side elevation, with portions broken away, of a lawn swing with my present improvements applied thereto.

7 Fig. 2 is a cross section, on the line 2-2 of Fig. 1, looking in the direction of the arrows. y y

Fig. 3 is a diagrammatic view showing the swing moving in one direction.

Fig. 4 is a similar view showing the swing as moving in the opposite direction.

Fig. 5 1s a sectional detail taken in line with the fan shaft, with parts broken away and parts shown in elevation.

Fig. 6 is a cross section on the line 6-6 of Fig. 7, looking in the direction of the arrows.

Fig. 7 is a section on the line 7-7 of Fig. 6, looking in the direction of the arrows.

Like numerals of reference indicate like parts throughout the several views.

Referring to the drawings,

1, 1 designate the uprights or supports of the swing, of any ordinary or approved form of construction, suitably braced to ive the assesses- .2 are the pendent swinging uprights, two upon each side of theswi-ng, and pivotally mounted at their upper. ends, manner to the upper ends of the supports 1, as shown clearly in Fig. 1. The platform, the seats and the side arms of the swing may be of any well-known or approved form of construction and form no part of the present invention. y

. In addition to the cross braces 4 at the top, the supports 1 are additionally braced by the transverse brace members 5 and secured to these cross braces 5 at substantially their midlength are the bearings 6 for a shaft 7. On thisshaftare loosely mounted the drums of spools 8, one near each end, andbetween these spools the fan blades 9 are affixed to the shaft. These blades may be of any well-known or preferred form of construction attached to the shaft in any suitable manner.

Each spool 8 comprises a body portion with a flange IO at oneend against which bears a washer 11, a cotter pin 12 passing through the shaft and engaging the washer and serving to limit the endwise movement of the spool on the shaft. The other end of the spool has an enlargement, as shown at 1.3, within which is a chamber 14, the inner wall of Whichis constructed in the form of a clutch member having the curved cam surfaces 15, in the present instance shown as three in number, and the abrupt shoulders 1-6, of like number, as seen clearly in Fig. 6. Cooperating with these curved surfaces and abrupt shoulders is a pin 17 loosely endwise movable through a transverse opening in the shaft 7 and engageable with the curved cam surfaces or the abrupt shoulders according to conditions.

i A plate .18 covers the outer Open end of this chamber, as seen best in Fig. 7, the same being held in place by a cotter pin 19 or the like passed transversely through the shaft.

The shaft 7 is mounted for limited endwise movement in its bearings, being limited in such movements by cotter pins or the like 20 passed transversely through the shaft 7 adjacent the ends of the spools and bearings.

21 is a cord having a plurality of winds around the one spool 8 and its opposite ends attached in any suitable manner, as at 22, to the opposed pendent members 2 upon one side of the swing. In the present instance I have sho n c mp 22 em ra g these m me as at 3, 3, in any suitable bers 2 and having eye-bolts 24 with adjusting nuts 25 as a means of attachment of the ends of the cord permitting adjustment.

when necessary.

26 is another cord wrapped a number of times around the opposite spool 8 and having its ends attached, as .at 27, to thependent members 2 upon that side of the swing, in the manner similar to the cords 21 upon the other side. I i With the parts constructed and arranged substantially as hereinbefore described, the operation is simple and will be readily understood when taken in connection with the annexed drawings. Briefly stated, it is as follows: 1

As the platform 28 isswung back and forth, the cords 21 and 26 will be alternately wound upon and unwound from their respective spoolsand by reason of the clutch mechanism constituted by the slidable pin 17 and the cam surfaces 15 and abrupt shoulders' 16 within the chamber 14 of the enlarged member 13 of each spool,the power is constant and the shaft 7 and, consequently, the fan blades 9 will be continually revolved in the same direction regardless of the direction in which the platform and the pendent members 2 are moving. Attention is called to Figs. 3 and 4: in which I have shown diagrammatically the movement of the fan blades as being the same regardless of the direction of movement of the platform 28 and the pendent members 2. It is to be noted that the cords 21 and 26 are oppositely wound upon their spools, that is one is wound from the top and the other from the bottom. As movement is given the swing, theone spool is revolved in one direction and the other spool is revolvedin the opposite direction. During this movement the pini17 in the chamber 14 of the one spool is out of engagement with the abrupt shoulders 16, as indicated in Fig. 6. During this movement thepin17 in the opposite spool is in engagement with the abrupt shoulders 16. As soon as the platform and the pend.- ent members 2 are moved in the opposite direction, this action is reversed and the spools,

Copies of this patent may be obtained for consequently, moved in opposite directions and both in a direction opposite to that in which they were previously revolved. Thus I attain constant power and motion to at all times revolve the shaft '7 and, consequently, the fan blades always in the same direction, theclutch members automatically reversing themselves as the direction of movement of the pendent members 2 is reversed.

The freedom of movement endwise of the shaft 7 permits the cords 21 and 26 to at all times wind properly upon their spools, avoiding any possibility of over-wrapping and consequent binding which would tend to interfere with the proper operation of the parts. I

Modifications in details may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages I g V [What is claimed as new is 1. In a fan attachment for swings, pendent swing members, a transverse fan shaft,

spools loosely mounted on said shaft one near each end, flexible connections between said pendent members and spools "adapted to be oppositely wound upon the latter, and clutch mechanism cooperating with said spools to give constant revolution to said shaft in one direction, said shaft being mounted for endwise movement in its bearm s.

2. In a fan attachment for swings, pendent swing members, a transverse fan shaft endwlse movable 1n its be arlngs, spools loosely mounted on said 'shaft,,a cord connected to opposite'pendent members at one side of the swing and wound uponthe adjaoent spool, a cord connected with the pendent members upon the opposite side of the swingand woundin an opposite direction upon the adjacent spool, and automatically reversible clutch mechanism cooperating with said spools and oppositely dispose'dto give constant revolution to the fan shaft in one direction regardless of the direction of movement of said pendent members.

In testimony whereof I'aflix my signature.

H 7 ISAAO'W, CRABTREE.

five cents each, by addressing the Commissioner of l 'atents, .Washington, D. C.

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