Abstract: A ski-exercising and rehabilitation apparatus of the invention wherein the down-hill-run unit (22), has a system of rotatable rolls (25) mounted with bearings in external clamping beams (20) and (21) and in the central beam (26) so that their rotation axes lie in one arched plane, whereas said central beam (26) is supported on its ends with shock absorbers (27), whereas the ends of external clamping beams (20 and 21) are jointed at one end with the shorter articulated connecting rods (18 and 19) of variable lengths and at the other end with the longer articulated connecting rods (23 and 24) of variable lengths, the other ends of which are rotatably connected with respective discs of the gear wheels (13, 14, 15 and 16) mounted on the front drive shaft (11) and rear drive shaft (12), said external clamping beams (20 and 21) being also jointed to rocking levers (34 and 35) which are connected to actuators (36) mounted in the frame base (1) of the apparatus, whereas the light signs (54), imitating the positions o

Abstract: The object of this invention is an the apparatus for ski exercising and rehabilitation, intended to serve for both beginning and professional skiers who shall later ski on snow on either carving or traditional skis, water skis or snowboards. The apparatus according to the invention has upper drive roll (11) and, below, lower drive roll (13) and rotatable glide rolls (12) in between them, all arranged on arc (b) in slanted side beams (4), (5) of frame (a), said arc being formed by contact points of the inner side of endless downhill run strip (14) in form of mat, with 2.

Abstract: A ski-exercising and rehabilitation apparatus of the invention wherein the down-hill-run unit (22), has a system of rotatable rolls (25) mounted with bearings in external clamping beams (20) and (21) and in the central beam (26) so that their rotation axes lie in one arched plane, whereas said central beam (26) is supported on its ends with shock absorbers (27), whereas the ends of external clamping beams (20 and 21) are jointed at one end with the shorter articulated connecting rods (18 and 19) of variable lengths and at the other end with the longer articulated connecting rods (23 and 24) of variable lengths, the other ends of which are rotatably connected with respective discs of the gear wheels (13, 14, 15 and 16) mounted on the front drive shaft (11) and rear drive shaft (12), said external clamping beams (20 and 21) being also jointed to rocking levers (34 and 35) which are connected to actuators (36) mounted in the frame base (1) of the apparatus, whereas the light signs (54), imitating the positions o

Abstract: The object of this invention is the apparatus for ski exercising and rehabilitation, intended to serve for both beginning and professional skiers who shall later ski on snow on either carving or traditional skis, water skis or snowboards. The apparatus according to the invention has upper drive roll (11) and, below, lower drive roll (13) and rotatable glide roles (12) in between them, all arranged on arc (b) in slanted side beams (4), (5) of frame (a), said arc being formed by contact points of the inner side of endless downhill run strip (14) in form of mat, with 2.

Abstract: A needle thread end holder for a sewing machine having bobbin thread replenishing mechanism in which an annular groove formed in the presser securing screw accomodates a stretched rubber "O" ring so as to apply only a limited frictional resistance to a thread introduced beneath the "O" ring insufficient to abort a bobbin thread replenishing operation.

Abstract: An angularly configured bracket is mounted at one end portion for pivotal adjustment in a sewing machine into a position of engagement at another end portion with fixed machine structure. A fastener extending through a slot in the bracket while the bracket is so adjusted secures the bracket to the upper end of a fixed post having a rotatable work feed controlling cam thereon, and so stabilizes the post against distortion by a spring biased cam engaging follower.

Abstract: A sewing machine which is operable in either a cam controlled feeding mode or a manually controlled feeding mode is provided with a spring which is moved into loading engagement with a feed regulating control lever by mode selecting mechanism when the selecting mechanism is disposed for manual control, and is moved away from the feed regulating control lever when the selecting mechanism is disposed for cam controlled feeding.

Abstract: A pattern selecting dial for a sewing machine is connected through a toothed driving belt to a remotely located rotatable member which carries a circularly arranged stepped cam and which can be turned with the application of low torque to the dial to effect the selective positioning of a cam follower opposite a pattern controlling cam stack.

Abstract: A sewing machine work feed regulating arrangement is disclosed including a manual control dial for setting the magnitude and direction of work feed and a pattern cam for automatically influencing feed magnitude and direction. Control cam means associated with the manual control dial and effective during a small angular dwell segment thereof influences separate follower means positively to effect either engagement or disengagement of the pattern cam control of the work feed.

Abstract: A sewing machine is secured to the platform of a sewing cabinet with a machine connected stud and a wing nut which is threaded on the stud and is permitted to turn only a limited amount so as to prevent excessive force from being applied to the machine.

Abstract: A compact sewing machine feed system utilizing sheet metal parts to reduce inertia, and separate feed and lift cams to simplify replacement for the purpose of optimizing feed characteristics.

Abstract: A sewing machine with a timing belt for transmitting power from a toothed driving pulley to a toothed driven pulley that rotates a loop taker is provided at each pulley on the belt entering side only with a belt guard which guides the belt onto the pulley and prevents teeth on the belt from jumping over teeth on the pulley.

Abstract: A pattern cam selector mechanism for sewing machines including a pattern cam follower retracting arrangement employing a slidable control block formed with a pair of substantially identical cam tracks disposed laterally opposite each other in mirror image relation, one tracked by a retracting linkage and the other tracked by a stationary abutment pin thereby to minimize functional forces incident to operation of this cam selector mechanism.

Abstract: The meshing bevel gears used to drive the vertical axis looptaker of a sewing machine are preloaded with a compressed resilient member which is prevented from deflecting to a position beyond its elastic limit during the running of the gears.

Abstract: An axially aligned presser bar collar and presser bar bushing in a sewing machine are connected by a helical spring having one end portion affixed to the collar and having the opposite end portion threaded onto a resilient split ring which is located in an annular groove in the bushing.

Abstract: A bushing, sleeve, bearing or like part is secured in a structural member with a clamping device which is screwed into the structural member at right angles to said part to cause a tapered portion of the device converging toward terminating a reduced diameter material end portion to forcibly engage the said part.

Abstract: An assembly for converting a sewing machine speed controller of the foot operated type to hand operation thereof includes a housing for slidably accepting the speed controller therein. Hand operable speed setting means mounted on the housing are provided for an operator to manipulate so as to set a desired speed, the speed setting means maintaining its set condition. Actuator means are further provided, coupled to the speed setting means and responsive to a set condition thereof for controlling the compression of the speed controller.