US748972A - Lifting-jack - Google Patents

Description

' No. 748,972. PATENTED JAN. 5, 1904.

M. M. MOORE, SR. LIFTING JACK.

APPLICATION FILED AUG. 7, 1903.

NO MODEL.

BYW

A TTORNE VS WITNESSEQ' c UNITED STATES Patented January 5, 1904.

PATENT OFFICE.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 748,972, dated January 5, 1904.

Application filed August '7, 1903.

To aZZ whom it may concern.-

' Be it known thatLMELVILLE M.MOORE,SI., a citizen of the United States, and a resident of Montecito Valley, Santa Barbara, in the county of Santa Barbara and State of California, have invented a new and Improved Lifting-Jack,of which the following is a full,clear, and exact description.

My invention relates to improvements in lifting-jacks, the same being especially adapted for use in raising the axles and wheels of vehicles; and the object that I have in view is the provision of a simple and durable construction by which an axle may be easily and quickly lifted, said device embodyinga swinging element adapted to accommodate itself to the changes in position of the axle on the raising thereof.

Further objects and advantages of the invention will appear in the course of the subjoined description, and the novelty will be defined by the annexed claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view illustrating my improved lifting-jack. in an operative position with relation to a vehicle-axle, a portion of the vehicle being indicated by dotted lines. Fig. 2 is a fragmentary detail perspective View, and Fig. 3 is a fragmentary detail sectional view. Fig. 4 is a detail view of another form of the hanger.

My improved lifting-jack consists of two members A B and a swinging hanger or suspension-bar O. The membersABare of un equal length, and they are made of wooden bars of proper size. The bar A is provided at one end with a handle or grip portion a, and the two barsABare disposed in lapping engagement at a point just below the handle a, thus bringing the bars into cooperative positions and permitting them to be connected pivotally together by a through-bolt b, the latter being furnished with a head b at one end and a nut b at the other end.

' The hanger or suspension-bar 0 forms one of the important features of my invention because it is loosely suspended from the bolt b and is self-adjusting to changes in position Serial No. 168,595. (No model.)

of the stand or prop afiorded by the members A B. The hanger consists of a fiat metallic bar which is bent or twisted at a point intermediate of its length, as at c, and the lower end of this hanger is again bent or curved into an olfstanding foot-piece O. The upper end of the hanger O is interposed between the members AB at the crossing-point thereof, and this hangerOis provided with an eye which is arranged to loosely receive the pivotal bolt b, whereby the hanger is operatively connected with the members of the stand, and it is free to turn on the bolt in a way to adjust itself to changes in position of the axle during the operation of lifting and lowering the same. The upper end of the hanger may be spaced relatively to the bars or members by means of washers 0 as shown by Fig. 3, which insures the free movement of said hanger.

Instead of making the hanger of flat metal and twisting the same, as shown by Figs. 1 and 2, said hanger may be made of round or curved metal, which allows the lower end thereof to be bent or formed into the footpiece without twisting the metal, as shown by Fig. 4.

In using my improved liftingjack the wooden bars are placed astride of an axle at the proper height. The freely-moving hanger falls against the axle and quickly adjusts itself to any height of the axle when it is lifted, so that when the handle a of the long bar A is pulled backward or forward, according to the position in which it is placed, the hook of the hanger is brought upwardly against the axle and lifts the Wheel clear of the ground, after which a movement of the hand or foot of the operator presses the short bar B into engagementwith the ground and firmly secures the jack in position. When the axle is thus suspended, it is so securely held by the jack that a chance lateral movement of the vehicle or a forward or backward movement of ten or twelve inches may be made without loosening or dropping the axle, because the swinging hanger adjusts itself to the position of the axle, and, in fact, said hanger prevents the vehicle from moving down a slight incline, such as a slanting washingfioor. The bars of the jack are of sufficient loosely suspended from the bolt and provided with an axle-engaging foot-piece.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MELVILLE M. MOORE, SR.

Witnesses:

HENRY P. LINTON, JAS. D. LOUSLEY.

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