US1893929A - Chair iron - Google Patents

Description

2 Sheets-Sheet H. W. BOLENS Jan. 10, 1933.

CHAIR IRON Filed June 20, 1930 Jan. 10, 1933.

H. w. BOLENS CHAIR IRON Filed June 20. 1930 2 Sheets-Sheet 2 Patented Jan. 1d, 1

rseaaaa HARRY W. BQLENS, 0F PORT \VASHING-TDN, WISCQNSIN CHAIR IRON Application filed. June 29,

This invention pertains to chair irons, and more particularly to irons having springheld tiltable seat spiders in combination with means for regulating the tension upon said spiders.

With irons of the foregoing character it is customary to utilize one or a pair of coil springs to oppose tilting action of the seat spindle. Such springs are opposed between one member of the iron while the retaining members are carried by an adjusting bolt, which in turn is carried by the other member of the iron. Consequently, as the adjusting hand wheel is run out on the bolt to relieve the tension upon the spring or springs, the latter frequently drop out from between their seats, due to the fact that the bolt is inadvertently let out beyond the expansible limits of the spring.

The present invention has primarily for its objectto overcome the foregoing objections hy the provision of means for limiting movementof the floating spring seat or retainer beyond supporting position for the springs when expanded to their limits.

Incidental to the foregoing, a more specific object resides in the provision of a transverse stop adapted to en 'age and prevent movement of the floating spring retainer beyond the substantial expansible limits of the spring.

A further object is to provide such stop or limiting member with projections for interengagement with the floating spring retainer at substantially the expansible limits of the spring.

A still further object resides in the provision of a stop or limiting member of the character described, whicn can be rocked to permit removal or replacementof the spring or springs without removal of the chair seat from its supporting spider.

With the above and other objects in view, vhich will appear as the description proceeds,

the invention resides in the novel construc- 1930. Serial No. 16-32570.

tion, combination, and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawings is illustrated one complete example of the physical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings, Figure 1 is a longitudinal section through a conventional structure of chair iron, with the present invention applied thereto;

Figure 2 is a plan view with parts broken away and in section to more clearly illustrate the structural features;

Fi ure 3 is a transverse section taken on the line 33 of Figure 1; and

Figure 4% is a fragmentary detail illustrating a modification of the invention.

Referring now more particularly to the accompanying drawings, the iron illustrated comprises a stationary member 1 having pivoted thereto a tiltable seat spider 2, to which the seat of the chair (not shown) is attached in any suitable manner.

The stationary member 1 comprises a yoke suitably secured upon the head of a conventional spindle 3. As best illustrated in Figures 1 and 2, the stationary member or yoke 1 is provided with a transverse vertical web 4, which is apertured for reception of the adjusting bolt 5, said bolt being carried by a fulcrum member 6, which engages the web 4 upon opposite sides of the bolt 5, as best shown in Figure 2.

In the form of the invention illustrated, the longitud nal arms 7 of the spider 2 are each provided with inwardly projecting studs 8 which serve to support a transverse spring seat 9, which in the present instance is engaged by a pair of coil springs 10 positioned upon opposite sides of the adjusting bolt 5. The outer ends of the springs 10 are seated upon a floating spring retainer 11 carried by the adjusting bolt 5, and engaged by the head of the same. Obviously, as the bolt is adjusted longitudinally by means of a hand wheel 12, tension upon the spring 10 ill be increased or decreased.

The structure thus far described is more or less conventional and therefore forms no specific part of the present invention, other than as set forth in the combinations hereinafter claimed, it being understood that the essential feature of the present invention as hereinafter set forth may be applied to irons of various structure with the same advantageous results.

Furthermore, while the present invention is shown as applied to an iron utilizing a pair of coil springs, it will be obvious, as the description proceeds, that the same is equally applicable to irons utilizing a single spring, the purpose of the invention residing primarily in the provision of means to prevent accidental displacement of the springs.

The operation of the iron thus far described is thought to be quite obvious, in that the spider 2 is free to tilt upon its pivotal connection with the yoke or stationary member 1, and such tilting action is necessarily resisted by the springs 10. Movement of the spider 2 in the opposite direction is limited by engagement of the transverse web 4, with a portion of the top plate 13, which connects the longitudinal arms 7, the normal position of the spider being illustrated in Figure 1.

From the foregoing, it will be readily seen that were the hand wheel 12 inadvertently run off the adjusting nut 5 beyond the expansible limits of the springs 10, the springs 10 would necessarily be unseated at one end, and therefore free to drop out from between the transverse seat 9 and the retaining member 11.

To avoid such possibility, the present in vention provides a transverse stop 14 carried by the longitudinal spider arms 7 and adapted to engage the spring retainer 11, when the springs have reached substantially their e):- pansible limits. Thus, the hand wheel 12 could be entirely run 0H of the adjusting bolt 5, while the springs 10 would remain seated between the seat 9 and retaining member 11.

In that form of the invention illustrated in Figures 1 to 3 inclusive, the stop 14 is shown rigidly secured to the arms 7. For the purpose of strengthening the stop 14, the same is of angle construction, the horizontal web of which is disposed adjacent the lower edge. Therefore, when it is desired to remove the springs 10, the seat must necessarily be detached from the spider 2 to allow the springs to be taken out from the top.

In some instances, it may be desired to remove the springs without necessitating detachment of the seat from the spider. In such case, the stop 14 may be pivotally secured to the longitudinal arms 7, as shown in the modification, Figure 4. In this structure, the stop will be locked in normal position by a screw or bolt 15, which when removed will allow the stop to be swung upwardly, as illustrated in dotted lines, thus allowing the retaining member 11 to be rocked downwardly and the springs 10 removed from the underside of the spider without detachment of the seat from the spider.

From the foregoing, it will be readily seen that ayery simple and effective means has been provided for preventing inadvertent release of the springs from their seats.

It will also be appreciated that the present form of the invention illustrated serves to reenforce and brace the forward ends of the spider arms 7 which, being at the forward end of the seat, are subjected to the greatest strain.

As best shown in Figure 2, the retaining member 11 is preferably provided with inwardly projecting spring seats 11 formed by perforating the metal and turning the same inwardly. In order to form a nesting engagement between the stop 14 and the retaining member 11, the stop may be provided with corresponding seats 14 adapted for interengagement with the recessed seats 11. Also, the stop 14 may have formed therein a depression 16 for reception of the head of the adjusting bolt 5, as illustrated in Figures 1 and 2.

IVhile the present invention is illustrated and described as applied to an iron in which the floating spring retainer is carried by the stationary member through the adjusting bolt 5, and the stop 14 carried by the tiltable seat spider, it is to be understood that the same may be applied with equal advantage in the reverse structure, in which the stop may be carried by the stationary member and the springs by the tiltable member.

I claim:

1. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring for resisting tilting action of said tiltablc member on the stationary member, adjustable retaining means for said spring, and means for engagement with said retaining means for preventing release of said spring by said adjustable retaining means when the adjustable retaining means is entirely released.

2. A chair iron comprising a stationary member, a tiltable member roclrably mounted on the stationary member, a coil spring for esisting tilting action of said tiltable member on the stationary member, adjustable retaining means for said springs carried by one of said members, and means carried by the other of said members for engagement with said retaining means for preventing release of said spring by said adjustable retaining means when adjustable means is entirely re leased.

3. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring seated on one of said members for resisting tilting action of said tiltable member on the stationary member, adjustable retaining means for said spring carried by one of said members including a spring seat, and means carried by the other of said members for engagement with said spring seat for preventing release of said spring from its seat upon the entire release of said adjustable retaining means.

4. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring seated on one of said members, an adjusting bolt carried by the other of said members, means carried by said bolt for retaining said spring in position, means for adjusting the bolt, and means for engagement with said retaining means for preventing release of said spring from its seat after release of the bolt by said bolt adjusting means.

5. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring seated on one of said members, an adjusting bolt carried by the other of said members, means carried by said bolt for retaining said spring upon its seat and regulating tension thereon, and means for engagement with said retaining means for preventing said retaining means from releasing said spring from its seat after release of said retaining means.

6. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring seated upon one of said members for resisting tilting action of said tiltable member on the stationary member, adjustable retaining means for said spring, means for engagement with said retaining means for preventing release of said spring from its seat after release of said adjustable retaining means for the spring, and means for rendering the last mentioned means inoperative.

7. A chair iron comprising a stationary member, a tiltable member rockably mounted on the stationary member, a coil spring seated on one of said members for resisting tilting action of said tiltable member on the stationary member, adjustable retaining means for said spring carried by one of said members, a stop carried by the other of said members for engaging said retaining means to prevent release of said spring from its seat, and means for rendering said stop inoperative.

8. A chair iron comprising a stationary member, a seat spider member pivotally Wisconsin.

HARRY W. BOLENS.

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