in referring to the drawings , and in particular fig1 the stair simulator of this invention 1 is disclosed . it includes a frame means , as at 2 , which is configured having a pair of inclined hand gripping members 3 and 4 , that connect into the housing or cover 5 , at its upper end , while extending downwardly , integrally , as at 6 and 7 , into base supporting frames 8 and 9 , as noted . the frontal ends of the base frames 8 and 9 connect into the housing 5 . the concept of this invention is to provide for stair simulating , during exercising . thus , a pair of foot platforms , 10 and 11 , are pivotally disposed by means of pivot arms , as at 12 and 13 , into the operating mechanism of this invention . thus , as one undertaking exercises stands upon the foot platforms , and pivots the platforms downwardly against their resisting movements , during usage , this simulator provides a duplication of the effort that is related to either the ascending of stairs , or climbing of a ladder , as aforesaid , both with some degree of resistance . in referring to fig2 the frame means 2 of this invention , without any housing or cover 5 , is disclosed . in this particular embodiment , the construction of the device is slightly revised , as to be explained , although the principle to be obtained from its usage and application remains the same . as disclosed , the frame means includes the hand gripping inclined members 14 and 15 , which have downwardly depending structural members , at their front and back ends , as can be seen at 16 through 19 , and which respectively connect with their floor or base frames 20 and 21 , as noted . provided centrally of the frame means is a column member 22 , which at its upper end provides means for furnishing a visual display , and read - out , of various data , whether it be indigital or analog form , providing information that may be relevant to the rate of usage of the exercising device , the degree of force encountered upon manipulation of its platforms , and the like . this type of information may be supplied electrically , or even mechanically , from the operative components of this invention , to be subsequently described . such displays are relatively disclosed in the art . the column means 22 , in this particular instance shown as vertically disposed , interconnects by means of bracing 23 to the supports 18 and 19 , while the column extends further downwardly , as at 24 , for interconnecting with bracing 25 at the lowermost frontal position of the frame means 2 . a cross bracing 26 is provided , for further stability . while the column means 22 of this invention is disclosed as being arranged vertically aligned , in the preferred embodiment , it is preferred that the column have an inclined disposition , as can be seen at 22 within fig3 and 4 . pivot axes 27 and 28 are pivotally mounted to the pivot assembly 29 , and which pivot assembly is disposed for shifting movement , vertically , or approximately vertically , upon the column portion 24 , as can be seen . the pivot assembly , in this instance , may undertake the configuration of a sleeve , as can also be seen in fig3 and 4 . connecting for pivotal movement upon the axes 27 and 28 are a pair of pivot arms , or links , 30 and 31 , with one of each link connecting to each of the left and right foot platforms 32 and 33 , respectively . as can be seen , each of the arms 30 and 31 are likewise pivotally connected by means of the pins 34 to the riser portion 35 of each of the platforms . the purpose for this is that the platforms 32 and 33 will remain horizontal with the surface , regardless of the disposition of the platform along the arc elevation of movement during their manipulation while exercising . means are provided for furnishing a resistance to the downward movement of the foot platforms during their manipulation . this is provided by means of a force biasing means , which in this particular instance comprises a pair of springs 36 , which may connect to one of the axes 27 or 28 , or even to the side of the pivot assembly 29 . the opposite end of the springs 36 have a belt 37 connected thereto , and which are disposed over pulleys 38 , as noted , and which will be subsequently defined . thus , resistance is provided to the downward movement of the foot platforms 32 and 33 , initially , by means of the force of the tension springs 36 , because of their connection , at their belt ends , to the shown risers 35 . in addition , adjustable resistance may be provided to the movement of the foot platforms , by means of any form of mechanically adjustable resistance means . in the preferred embodiment , it includes a flywheel 39 that interconnects through a gear reducer 40 , with a shaft 41 interconnecting through the gear reducer to the aforesaid pulleys 38 . the belt 37 extends over the pulleys 38 , and through adjusting of the flywheel 39 , the degree of resistance required to pull the belt 37 over the pulleys 38 may be controlled , in order to vary the amount of force required to attain a downward shifting of the platforms 32 and 33 , during undertaking of an exercising function . obviously , other forms of force reducing means , of an equivalent structure , or which provide an equivalent result , and that is for varying the force required to attain movement of the foot platforms , may be embodied in this invention . see also fig5 . as can be further seen in fig2 the pivot assembly 29 has connecting to it a threaded screw 42 and which is operatively associated with a motor means 43 , which may be of the reversing type , with the screw 42 threadedly engaging within a sleeve 44 , and with said sleeve being connected to the pivot assembly 29 . hence , when the motor 43 is energized , in one direction or the other , the screw 42 is rotated , providing for its threaded engagement within the threaded sleeve 44 , to raise or lower the pivot assembly 29 , as can be understood . obviously , once again , other equivalent mechanical or electrical means for raising or lowering of the pivot assembly 29 , may be considered . in referring to fig3 and 4 , the principle of this invention , and what is desired to be attained through the usage , manipulation , and application of this invention , can be readily discerned . for example , it is to be noted in fig3 that the pivot assembly is arranged at its uppermost position upon the lower column 24 . when in this position , and due to the rearward incline in the disposition of the column 22 , as can be noted , the arc angle of pivot for the foot platforms 32 and 33 is upon an arc that is nearly vertically disposed , as can be noted by the directional arrow 45 . on the other hand , as can be seen in fig4 when the pivot assembly 29 is lowered , through the energization of the motor means 43 , in an opposite direction , the foot platforms , while having a similar arc angle pivot range , in this condition , provides a reorientation in its arc of movement , in a forwardly disposed direction as the foot platforms move upwardly , as can be noted by the directional angle 46 . thus , as disclosed in fig3 the arc angle of movement of the foot platforms during their manipulation , while exercising , is generally in a vertical direction , and therefore , exercising upon the platforms when adjusted into such position is equivalent or similar to the exertion undertaken when climbing a ladder . on the other hand , and alternatively , when the pivot assembly is lowered with respect to the column 24 , as can be seen in fig4 the arc angle of pivot of the foot platforms is angulated forwardly of the structure , such that when one exercises upon the device when adjusted into this condition , the exercises undertaken simulate that of ascending stairs , and therefore , may exert stress and exercise upon different muscles , or from a different angle , upon the muscles , than from the adjusted position as shown in fig3 . these are examples of the dexterity in usage of this particular invention , as a result of the various adjustment features built into it . as can be further seen in fig5 the column 22 , and more particularly its bottom segment 24 , mounts for sliding movement of the pivot assembly 29 thereon . the pivot assembly 29 may have integrally formed rearwardly thereof , some pivot mounts , for mounting of the shafts 27 and 28 , for supporting of the level arms 30 and 31 , as previously explained . thus , the actuation of the motor means 43 , turns its threaded screw 42 , within the sleeve 44 , for raising or lowering of the pivot assembly 29 , as previously explained . in addition , the flywheel 39 may include , by way of example , a flywheel therein , and have a friction strap , as noted at 46 , which may be adjusted by means of a servo motor 47 , or the like , and which also may be actuated or adjusted by means of some push button control provided upon the control panel 48 . thus , the degree of resistance offered by the flywheel means 46 , through its shaft 49 , and into the gear reducer 40 , may provide further adjustment to the degree of resistance offered by the foot platforms 32 and 33 , when manipulated by the exerciser . a proximity sensor 50 that cooperates with magnets 51 , may provide for an indication as to the speed of operations of the device , or the rate at which the foot platforms are depressed , so as to provide an indication , and readout , as to the climbing speed encountered by the exerciser , during usage of the device . these are just examples as to how the stair simulator of this invention , may incorporate operative components , to achieve its intended results . variations or modifications upon the subject matter of this invention may occur to those skilled in the art upon reviewing the subject matter of this invention . such variations , if within the spirit of this invention , are intended to be encompassed within the scope of any claims to patent protection issuing upon this development . the description of the preferred embodiment set forth herein is done so for illustrative purposes only .
a stair simulator exerciser for use in maintaining personal fitness including a frame member , the frame member having a column provided at its frontal portion , the column may incline rearwardly , a pivotal assembly is mounted for approximate vertical adjustment upon the column , and a pair of pivotally disposed foot platforms connect with the assembly . when the assembly is raised upon the column , the foot platforms undertake a particular arc of movement with respect to the frame member , but that when the pivotal assembly is arranged downwardly , upon the column , the angle of the arc of shifting of the foot platforms differ from the previous setting . structure is provided for regulating the degree of resistance to the downward movement of the foot platforms during performance of an exercising function .