US893341A

US893341A - Roller-skate.

Info

Publication number: US893341A
Application number: US41991408A
Authority: US
Inventors: Johannes F H Martinsen
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-03-09
Filing date: 1908-03-09
Publication date: 1908-07-14
Anticipated expiration: 1925-07-14

Description

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NGL 893,341.

APPLICATION FILED MAE, Q 190B.

III; Il

IEEE:

JOHANNES F. H. MARTINSEN, OFy CHICAGO, ILLINOIS.

ROLLER-SKATE Specification of Letters Patent.

Patented July 14, 1908.

Application led March 9, 1908. Serial No. 419,914.

To all whom it may concern:

Be it known that I, JOHANNES F. I-I. MAR- frINsEN, a citizen of the United States, residlng at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful ImprovementV in Roller-Skates, of which the following is a specification.

My invention relates to roller skates, and the object of the invention is to provide means to yieldingly support the foot of the skater and to permit the rocking movement which is possible in ice skating.

I obtain my obj ect by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is a side view'of a skate embodying my invention. Fig. 2 is a plan sectional view thereof taken on the line 2 2 of Fig. 1. Fig. 3 is a transverse sectional elevation taken on the line 3 3 of Fig. 1, and Fig. 4 is a perspective view of'a portion of the footrest.

Similar numerals refer to similar parts throughout the several views.

The truck 10 is su ported upon the rollers' 11 and consists pre erably of a single piece of sheet steel lying, in the main, horizontally, but having lateral depending flanges `10a with extensions 10b adapted vto sup ort the axles 12. The foot rest 13 is provi ed with suitable means of attachment to the foot of the user. In the present instance these attaching means consist of a heel plate 14 having a heel strap 15 and a toe plate 16 having a toe strap 17. These attaching means may assume any desirable form.

In its simplest and best form the foot rest 13 consists of a plate ada ted, in the main, to lie horizontally above t e truck 10, and is provided with lateral depending stiffening lianges 13a with extensions 13b and 13C at the front and rear respectively. A spring 18 which is preferably of a length approximately equal to the length of the truck is secured at' its middle to the middle of said truck. `The preferred means of attachment are the rivets 19, which are located one in front of the other in order to hold the middle portionof the spring firmly and rigidly to the truck. The ends of the spring extend upwardly from the middle portion, and are attached at the front and rear ends to the extensions 13b and 13C respectively. In the preferred form of attachment, eyes 18a are formed at the extremities of the s ring, and these inclose. bolts 20.

-One of tiese bolts is rigidly fastened to the extension 13C and the other is slidingly mountedl in the horizontal slot 13d in the extension 13b.A This affords the requisite play between the parts and permits the spring to expand and contract as the footrest falls and risesrelatively to the truck.

When the skate is in use, the footrest may yield downwardly without departing from horizontal position, or it may be tilted backwards or forward, as a result of which the sensation to the skater will be similar to that when using ice skates. This construction has the advantage, however, of giving more yielding support to the skater than ordinarily occurs musing ice skates. The spring absorbs all ordinary jar due to the inequalities in the surface skated over and gives a smoothness in running which greatly adds to the pleasure yof its use. A heavy or light spring will be employed depending upon the weight of the person who is to use it.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a roller skate, a truck provided with rollers, a footrest having means of attachment to the foot of the wearer, a spring rigidly fastened to the middle portion of the truck, a pivoted connection between one end of the s ring and the corresponding end of the truc and a sliding connection between the other end of the spring and corresponding end of the truck. l

2. In a roller skate, the combination of a truck provided with rollers, a footrest having means of attachment to the foot of the wearer, a spring rigidly fastened to the middle portion of the truck and articulate connection between the rear end of the spring and the rear end of the footrestand a sliding connection between the forward endof the spring and the forward end of the' footrest.

3. In a roller skate, two parallel rigid members, the lower one mounted on rollers and the u per one adapted to be secured to the foot of the user, the upper member having lateral depending iianges horizontally slotted, a strip of spring metal rigidly fastened in the middle to the loWer of said memscribed my name in the presence of two bers and at its ends connected to the upper Witnesses.

of said members, one of said Connections noluding a bolt held by said Spring and pen`e- JOHANNES F H' MARTINSEN' trating the slots in the flanges of said upper lVtnesses:

member. HOWARD M. COX,

In Witness whereof, I have hereunto sub- C. J. CHRIsToFFEL.