US853081A - Equalizing apparatus. - Google Patents

Description

PATENTED MAY 7, 1907.

No. .853;081. I

d. d. GRIMES. EQUALIZING APPARATUS.

APPLICATION I'ILED SEPT. 14, 1906.

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PATBNTED MAY 7, 1907.

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APPLICATION IILBD SEPT. 14, 1906.

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CURTIS C. GRIMES,

PATENT @FFICE.

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EQUALIZING APPARATUS- 1 Specification of Letters Patent.

Patented May '7, 1907.

Application filed September 14, 1906. Serial No. 834,636.

T0 on whom, it may concern:

Be it known that I, Owens 0. GRIMEs, a citizen of the United States, and a resident of Haskell, in the Cherokee Nation and Indian I Territory, have invented certain new and l useful Improvements in Equalizing Appal ratus, of which the following is a specification.

This invention is an improvement in equalizers comprising in connection with the platform and the frame in connection with which said platform is movable, means whereby the platform may be retained in the same plane or planes parallel to its normal l position when depressed at any point throughout its surface; and the'invention consists in certain novel constructions and combinations of parts as will be hereinafter described and claimed.

In the drawings Figure 1 is a vertical longitudinal section and Fig. 2 is a horizontal section on about the line 22 of Fig. 1 of an apparatus embodying my invention. Fig. 3 is a vertical cross-section on about the line 33 of Fig. 1. Fig. 4 is a detail vertical sec tion somewhat enlarged showing one end of the apparatus, and Fig. 5 is a detail perspective view partly in section.

I have shown my invention as embodied in a bedstead and in this construction the bedstead A forms what may for convenience of reference be termed the main frame and the spring mattress frame B constitutes what may be termed the platform which is movable relative to the said main frame, but it l I l will be understood that my invention is capable of embodiment in various constructions and can be employed to advantage in supporting car beds, wagon beds, in buffers, and the like without departing from any of the principles of the invention.

As shown the platform B is movable relative to the main frame A and is so connected with the main frame that when any portion of the platform is depressed, all of the other portions will be correspondingly depressed so that the platform will be maintained in position parallel to its normal position at all times.

Levers C are arranged adjacent to the op- I posite ends of the platform B and are pivoted between their ends and preferably a short distance below their upper ends to the platform, the said levers having the upwardly projecting arms C and the downwardly pro- I jecting arms C and being pivoted preferably by means of cross-shafts C which extend below the platform B from side to side thereof and are j ournaled at their ends in bearings B provided on the under side of the platform B at the opposite sides thereof. These shafts C have at their ends enlarged sections or portions 0* from which project at an angle to the vertical and toward the ends of the main frame crank arms D which form with the links E connections between the levers C and the main frame. It should be understood that the levers C comprise in the con struction shown the shafts C with their enlarged portions C and the arms C and C as well as the crank arms D which being rigid with the arms C and C operate as parts of the same lever in securing the equalizing results sought by my invention.

The links E are pivoted at their lower ends to the outer ends of the crank arms D and at their upper ends to brackets F which are bent to engage with the end rails A of the main frame as shown in Figs. 1, 4 and 5 of the drawings. A spring connection G extends between and connects the lower ends of the depending arms C of the opposite levers and gives the necessary resilience and spring to the platform B when weight is applied thereon and also operates to return the said platform after the same has been forced from its normal position and the force released.

Rods or connections H connect the opposite levers and are secured at one end to the upper arm of one lever and to the lower arm of the other or opposite lever crossing each other midway between the levers and being secured to the said levers at points equidis tant from the pivotal aXis C These connections H transmit the motions of one lever to the other so that if one end of the platform be depressed the opposite end will be correspondingly depressed by reason of the said connections H and the operation of the crank arms and links connecting the same with the main frame.

The construction is simple, easily operated and adapted for the different purposes for which it may be used and efficiently serves the purpose for which it is designed.

What I claim is 1. An equalizing apparatus substantially as herein described. comprising a main frame, a platform movable relatively thereto, levers pivoted to the platform and having arms projecting on opposite sides of its pivot and IIO ' the lower arms the same with and the lower arms of the opposite levers, a spring connection between substantially as set forth. of tlie opposite levers, and 4. The combination of the main frame, the connections extending between the upper platform, the levers having pivoted shafts arms of each of the levers and the lower arms l extending transversely and journaled at of the respective opposite levers, substantheir ends to the platform and forming pivtially as set forth. ots for the levers, said levers having arms 2. The combination of the main frame, the l above and below their cross-shafts, crank cranks and links connecting the mam frame,

platform movable relative thereto, levers arms projecting from the cross-shafts, links pivoted to the platform and having upper connecting said crank arms with the main and lower arms, springs connecting the lower frame, a spring between the lower arms of arms of the upper levers, connections. bethe opposite levers, and equalizing connectween said levers and extending between the tions between the opposite levers, substanupper arm of each lever and the lower arm of ti ally as set forth. the opposite lever, and connections between 5. The combination of the main frame, a the levers and the main frame, substantially platform movable relatively thereto, the opas set forth. posite levers pivoted to the platform and 3. The combination of the main frame, the having projecting crank arms, and means platform movable relatively thereto, levers connecting the same with themain frame, pivoted to the platform and having arms and equalizing connections between the opabove and below their pivots and crank arms, links pivoted at one end to the crank posite levers whereby to enforce a common arms, brackets to which the other ends of the said links are pivoted, said brackets being connected with the main frame, a spring exis depressed at any point, substantially as set forth.

CURTIS C. GRIMES. Witnesses:

SoLoN C. KEMON, PERRY B. TURPIN.

tending between the lower arms of the oppo. site levers, and connections extending between the upper arms of each of the levers movement of said levers when the platform

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